#help-with-rp2040-pio | adafruit | Page 3

small meteor Mar 20, 2021, 3:07 PM

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I inspect the cmake output with most compiles, if I think something's apt to go wrong.

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Since it is colorized, the errors stand out well enough to do so fairly efficiently.

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Capturing them to a text file (Including STDERR) can help with that.

candid seal Mar 20, 2021, 3:13 PM

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I 100% agree I have blinders on with this thinking!

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That’s why I’m pumped to get feedback on it from you. Even if you can’t replicate my issue, it would still let me break out of my mental box and think about other things.

small meteor Mar 20, 2021, 3:15 PM

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;) I'll be 'good and' surprised if my code, and the blink demo, don't run first pop. ;)

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I got CamelForth reading a buffer from an ascii upload into SRAM, writing that SRAM buffer to flash, cold booting .. and running the new source code from QSPI flash space. Stored in human-readable source code on-target. ;)

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(Dr. Brad Rodriguez is the author of CamelForth in C)

candid seal Mar 20, 2021, 3:42 PM

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I may be over interpreting silence, but I kind of feel like not getting any response from the support staff on my thread means I’m on the right track and the issue really is the flash boot process

candid seal Mar 21, 2021, 7:03 PM

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@small meteor - FYI for when your Feathers arrive

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https://forums.adafruit.com/viewtopic.php?f=57&t=176745&p=862505#p862505

Adafruit customer service forums • View topic - Feather RP2040 won'...

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djix123 on the Forum solved this for me

small meteor Mar 21, 2021, 7:23 PM

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@candid seal Definitely some science going on there. Congrats!

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Also sounds like I'll need to do the same thing.

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The clock div I would have tried but not the rest of it.

candid seal Mar 21, 2021, 7:52 PM

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small meteor The clock div I would have tried but not the rest of it.

same - @distant spade had suggested increasing the PICO_FLASH_SPI_CLOCKDIV to me way back at the beginning. I think that's still necessary too, but I didn't realize you had to explicitly declare to use the boot2_generic_03h.S over the others. Like a week ago I actually tried modifying that file following along with Scotts DeepDive where he was discussing it. Being named "generic" I thought it was already set as the default boot2 file 😛 - Glad it was an easy fix!

small meteor Mar 22, 2021, 10:54 AM

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 $ cat -n boot2_generic_03h.S 
  8 // Details: \
        * Configure SSI to translate each APB read into a 03h command
  9 //  * 8 command clocks, 24 address clocks and 32 data clocks
 10 //  * This enables you to boot from almost anything: you can pretty
 11 //    much solder a potato to your PCB, or a piece of cheese
 12 //  * The tradeoff is performance around 3x worse than QSPI XIP

small meteor Mar 22, 2021, 11:10 AM

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For better performance:

https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2_common/boot_stage2/boot2_w25q080.S#L37

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That seems like a prying point where you could get your crow-bar in ;)

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(The CMakeLists.txt file points to this file as the default if none are specified)

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I have no idea about the part numbers and flash capacities - could just be the wrong file.

ebon lily Mar 22, 2021, 12:52 PM

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do you think it is possible to read a touch on a pin, without needing a button?

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i kinda forgot to order buttons :/

shell badge Mar 22, 2021, 1:20 PM

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FYI: https://mobile.twitter.com/aallan/status/1373971957700567044

Alasdair Allan (@aallan)

Looks like we have a rather nice community port of the #Arduino core to #RP2040 and #RaspberryPiPico. Looks fairly complete as well. Github at https://t.co/OtD7z2Kar7, discussion at https://t.co/8q56IttWOS. https://t.co/lAIiPzGKSY

▶ Play video

small meteor Mar 22, 2021, 3:33 PM

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@candid seal Here's a prebuilt .UF2 with your changes:

https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/tree/dvlp-boot2-aa/pre-built-uf2.d/1-Feather_COPY_TO_RAM.d

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Payload is here:
https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/dvlp-boot2-aa/17-camelforth-b.d/pico-examples/CMakeLists.txt#L13

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It says:

if ( BOOT2_GENERIC_CF_LOCAL ) # calling shell script establishes this
    if (NOT PICO_DEFAULT_BOOT_STAGE2_FILE)
        set(PICO_DEFAULT_BOOT_STAGE2_FILE "${PICO_SDK_PATH}/src/rp2_common/boot_stage2/boot2_generic_03h.S")
    endif()
endif()

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This is how it gets triggered:

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cmake .. -D"PICO_BOARD=adafruit_feather_rp2040" -D"BOOT2_GENERIC_CF_LOCAL=1"

in:

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https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/dvlp-boot2-aa/17-camelforth-b.d/pico-examples/build/run_cmake_feather.sh#L10

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Compiler's response is:

    # [  1%] Building ASM object pico-sdk/src/rp2_common/boot_stage2/CMakeFiles/bs2_default.dir/boot2_generic_03h.S.obj

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That [compiler response] changes .. to the other one (boot2_w25q080.S.obj) ..

.. when the RPi Pico is the target board:

[  1%] Building ASM object pico-sdk/src/rp2_common/boot_stage2/CMakeFiles/bs2_default.dir/boot2_w25q080.S.obj

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PICO_SDK_PATH was set into the environment (xterm/shell) as the SDK manual recommends.

candid seal Mar 22, 2021, 6:57 PM

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small meteor <@!248264531606765568> Here's a prebuilt `.UF2` with your changes: *<https://gi...

cool!

small meteor Mar 23, 2021, 2:35 PM

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@candid seal Worked flawlessly on the Feather RP2040 ;)

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(saw nothing unexpected)

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https://termbin.com/q3o6

dump from flash at (near the) high end, low end, and at 0x10040000 (where I typically store ASCII uploads to the target).

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Just reflashed using the 'reflash' word in Forth, and a no_flash image compiled for Raspberry Pi Pico RP2040 - on the Adafruit Feather RP2040. Looks the same as on correct hardware, at least superficially. ;)

candid seal Mar 23, 2021, 3:15 PM

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@small meteor Nice!

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Did you run the -DPICO_DEFAULT_BOOT_STAGE2_FILE build command at compile or just default ?

small meteor Mar 23, 2021, 3:27 PM

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@candid seal I linked the current source yesterday, I think.

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https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/dvlp-boot2-aa/17-camelforth-b.d/pico-examples/CMakeLists.txt#L11

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$ cmake .. -D"PICO_BOARD=adafruit_feather_rp2040" -D"BOOT2_GENERIC_CF_LOCAL=1"

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The second define is just a flag to trigger CMakeLists.txt just linked.

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(it's the first mechanism that 'worked' - no claim of elegance here)

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But I'm fairly sure I was reading from flash using the 'wrong' .UF2 a little while ago.

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Yup. in no_flash I have the old timestamp for RPi Pico RP2040 compile.

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Yet it read in the source code from flash that I uploaded to the Feather this morning. ;)

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I don't seem to be able to raise the onboard LED on GPIO13 without the Feather-specific build, though. ;)

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Yeah, the copy_to_ram version (of the Pico compile) won't run but the no_flash version does run on the Feather.

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flash_range_erase() is called to wake up the flash.

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https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/camelforth-b/camelforth-b.c#L61

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(the copy_to_ram version of this program, doesn't do this .. or I have things inverted, maybe)

small meteor Mar 23, 2021, 4:02 PM

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Didn't seem to work if built against the boot2_w25q080.S variant.

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i.e.

 cmake $   strings camelforth-b.uf2 | egrep "w25q|eather"
boot2_w25q080
adafruit_feather_rp2040

small meteor Mar 23, 2021, 4:32 PM

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@candid seal https://github.com/raspberrypi/pico-sdk/issues/275

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Looks like they'll be making generic the default if it's not overridden by the target's .h file. ;)

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So, if we'd never spoken and I tried everything 3 weeks from now, it'd have just 'worked' with no head-scratchin'.

candid seal Mar 23, 2021, 4:57 PM

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@small meteor Awesome, that makes sense to let the board def header declare it

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Further idiot proof the sdk against users like me 😂

small meteor Mar 23, 2021, 5:08 PM

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Hey I wouldn't have solved this.

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Instigating a solution is valuable. Be of good cheer.

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Shake n Bake .. "an' Ah hailped!"

modern anchor Mar 24, 2021, 12:26 AM

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shell badge FYI: https://mobile.twitter.com/aallan/status/1373971957700567044

works pretty well 👍

shell badge Mar 24, 2021, 12:26 AM

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Sweet!

wraith storm Mar 24, 2021, 1:36 AM

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I've run across PIO PWM examples in C, it stops the pio statemachine, does a write, then executes a pull and moves the data into the isr before restarting the statemachine. When I try this with CircuitPython, it hangs on the write. Has anyone got the PIO PWM example to work in circuitpython?

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https://github.com/raspberrypi/pico-examples/tree/master/pio/pwm

GitHub

raspberrypi/pico-examples

Contribute to raspberrypi/pico-examples development by creating an account on GitHub.

candid seal Mar 24, 2021, 2:30 AM

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This worked for me

https://learn.adafruit.com/intro-to-rp2040-pio-with-circuitpython/using-pio-to-control-led-brightness

Adafruit Learning System

An Introduction to RP2040 PIO with CircuitPython

Learn how to use the powerful I/O coprocessor inside the RP2040

wraith storm Mar 24, 2021, 2:49 AM

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yeah, that's completely deinit'ing the statemachine and re-initializing it with new values, I've done that successfully. Instead I wanted to pause the statemachine and update the isr before restarting it, as in the C example. Or even just trying to write the ISR while the statemachine is still running, but no luck

distant spade Mar 24, 2021, 3:15 PM

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@wraith storm init the PIO with wait_for_txstall=False

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otherwise write waits for a stall that never comes

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(because of pull noblock)

wraith storm Mar 24, 2021, 4:05 PM

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Did that already

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Still stalls

distant spade Mar 24, 2021, 4:07 PM

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post your full code and I can take a look later

wraith storm Mar 24, 2021, 5:35 PM

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import time
import rp2pio
import board
import adafruit_pioasm
import array


pwm = """
.program pwm
    set pins 0b00
    pull block
    out y 32
    mov isr y
setpin:
    pull noblock
    out x 32
    mov y isr [25]
    set pins 0b01
floop:
    jmp x!=y fnoset
    set pins 0b00
fnoset:
    jmp y-- floop
    mov y isr [28]
    set pins 0b10
sloop:
    jmp x!=y snoset
    set pins 0b00
snoset:
    jmp y-- sloop
    jmp setpin
"""


assembled = adafruit_pioasm.assemble(pwm)


def set_dc(sm, counts, dc):
    dc_counts = array.array('L', [0])
    dc_counts[0] = int((1.0 - dc) * counts)
    sm.write(dc_counts)
    return dc_counts[0]


def set_frequency(sm, freq):
    freq_counts = array.array('L', [0])
    sm_freq = sm.frequency
    freq_counts[0] = int(sm_freq / (4 * freq)) - 16
    sm.write(freq_counts)
    return freq_counts[0]


sm = rp2pio.StateMachine(
    assembled,
    frequency=125_000_000,
    first_set_pin=board.GP0,
    set_pin_count=2,
    wait_for_txstall=False,
)

counts = set_frequency(sm, 10_000)
time.sleep(0.01)
for dc in range(100):
    duty_cycle = (dc + 1)/100
    set_dc(sm, counts, duty_cycle)
    time.sleep(0.02)

sm.stop()
sm.run(adafruit_pioasm.assemble("""pull\nout isr 32\nmov y isr"""))
print('here')
counts = set_frequency(sm, 20_000)
print('here')
sm.restart()

time.sleep(0.01)
for dc in range(100):
    duty_cycle = (dc + 1)/100
    set_dc(sm, counts, duty_cycle)
    time.sleep(0.02)

distant spade Mar 24, 2021, 5:56 PM

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@wraith storm what line does it hang on? it looks ok to me

wraith storm Mar 24, 2021, 6:43 PM

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stops after the first 'here' gets printed

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presumably it stops on the sm.write in set_frequency

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@distant spade

distant spade Mar 24, 2021, 7:35 PM

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@wraith storm ah, that'd be because the sm is stopped and won't pull from the fifo

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the run will write the commands to the SM without waiting to see if the first pull stalls

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(and then just overwrite it with the out)

wraith storm Mar 24, 2021, 7:36 PM

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is there a different order I need to use? or am I just doing it wrong entirely?

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I would like to update y/isr without de-init'ing the statemachine

distant spade Mar 24, 2021, 7:37 PM

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the start of the program does the same thing run does right?

wraith storm Mar 24, 2021, 7:37 PM

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yeah

distant spade Mar 24, 2021, 7:37 PM

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you could run("jmp 1") though I'm not sure if it correctly accounts for the offset

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and then do the write

wraith storm Mar 24, 2021, 7:38 PM

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still hangs

distant spade Mar 24, 2021, 7:38 PM

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restart should also start the program back at the top

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(though there may be bugs)

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I'm assuming you are doing this to learn PIO. otherwise pwmio.PWMOut is probably what you want for PWM

wraith storm Mar 24, 2021, 7:41 PM

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I wish I could, I'm actually PWMing two different pins with a sync'd 180 phase difference and a short deadtime to drive a push-pull mosfet stack

distant spade Mar 24, 2021, 7:41 PM

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ah

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what code do you have now?

wraith storm Mar 24, 2021, 7:44 PM

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# -*- coding: utf-8 -*-
"""
Created on Mon Mar 22 23:10:52 2021

@author: ktritz
"""
import time
import rp2pio
import board
import adafruit_pioasm
import array


pwm = """
.program pwm
    set pins 0b00
    pull block
    out y 32
    mov isr y
setpin:
    pull noblock
    out x 32
    mov y isr [25]
    set pins 0b01
floop:
    jmp x!=y fnoset
    set pins 0b00
fnoset:
    jmp y-- floop
    mov y isr [28]
    set pins 0b10
sloop:
    jmp x!=y snoset
    set pins 0b00
snoset:
    jmp y-- sloop
    jmp setpin
"""


assembled = adafruit_pioasm.assemble(pwm)


def set_dc(sm, counts, dc):
    dc_counts = array.array('L', [0])
    dc_counts[0] = int((1.0 - dc) * counts)
    sm.write(dc_counts)
    return dc_counts[0]


def set_frequency(sm, freq):
    freq_counts = array.array('L', [0])
    sm_freq = sm.frequency
    freq_counts[0] = int(sm_freq / (4 * freq)) - 16
    sm.write(freq_counts)
    return freq_counts[0]


sm = rp2pio.StateMachine(
    assembled,
    frequency=125_000_000,
    first_set_pin=board.GP0,
    set_pin_count=2,
    wait_for_txstall=False,
)

counts = set_frequency(sm, 10_000)
time.sleep(0.01)
for dc in range(100):
    duty_cycle = (dc + 1)/100
    set_dc(sm, counts, duty_cycle)
    time.sleep(0.02)

sm.stop()
#sm.run(adafruit_pioasm.assemble("""jmp 1"""))
sm.restart()
print('here')
counts = set_frequency(sm, 20_000)
print('here')
#sm.restart()

time.sleep(0.01)
for dc in range(100):
    duty_cycle = (dc + 1)/100
    print(duty_cycle)
    set_dc(sm, counts, duty_cycle)
    time.sleep(0.1)

print('done')```

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this runs through without hanging, but the frequency is 2Mhz after the restart regardless of what I actually set

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this is just stopping and restarting the SM

distant spade Mar 24, 2021, 7:48 PM

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I don't have any other ideas. the C source for it is here: https://github.com/adafruit/circuitpython/blob/main/ports/raspberrypi/common-hal/rp2pio/StateMachine.c

GitHub

adafruit/circuitpython

CircuitPython - a Python implementation for teaching coding with microcontrollers - adafruit/circuitpython

wraith storm Mar 24, 2021, 7:57 PM

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ok, I'll take a look. Thanks for the help. Worse comes to worse, de-initializing and re-initializing works

brave surge Mar 26, 2021, 2:35 AM

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anybody have trouble letting Thonny load the UF2 for Micropython on the feather RP2040?

small meteor Mar 29, 2021, 7:32 PM

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guess what's in stock right now

https://www.adafruit.com/category/875

quaint dagger Mar 29, 2021, 8:15 PM

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I have my Feather RP2040 here. I loaded CircuitPython on it and played with that a little: got the Python version of blink working. Then I moved over to pico-examples, built blink there and then loaded it on the board (using BOOTSEL) by copying the built .u.f2 file. It doesn't blink. Thoughts?

small meteor Mar 29, 2021, 8:19 PM

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pico-examples sounds like the C/C++ SDK.

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If it says GPIO25 change that to GPIO13.

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That flash issue is probably still floating around also (see the scrollback here, I think)

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https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/CMakeLists.txt#L13

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The generic thing has to be enabled for the Feather RP2040 afaik.

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This is where the above code line is triggered:
https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/build/run_cmake_feather.sh#L10

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That's how I did it - at the time there was no official way in a boilerplate I could use, from what I was aware of, at least. ;)

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I think it was in milestone 1.2.0 to fix the issue with the generic .S file (boot stage 2?)

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https://github.com/raspberrypi/pico-sdk/issues/275

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__@kilograham added this to the 1.2.0 milestone 8 days ago

velvet frigate Mar 29, 2021, 9:13 PM

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oh sweet a channel just for PIO, exactly what I need 😄

velvet frigate Mar 29, 2021, 9:30 PM

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I'm trying to code a very simple VGA interface. It's monochrome (i.e. only 1 signal out).

So far, the best I've come up with is splitting the PIO into 3 different state machines, each running one program.

One program handling VSYNC, one for HSYNC and the last for the DISPLAY signal. They communicate between themselves using IRQ.

The DISPLAY program is very simple, pulling 1 bit from OSR and sending that to the GPIO. GPIO HIGH is the bit is 1, and LOW if 0.

If you allow the jankiness of this pseudo-code, this is roughly what I would like to achieve:

.program DISPLAY
.wrap_target
  if (IRQ_SIGNAL != 0) { // if magically this didn't take one cycle
    out pins, 1;
  }
.wrap

IRQ_SIGNAL would be set to 1 by either HSYNC or VSYNC during their respective blanking intervals.
But as far as I can tell I can't do something like that. The best I've seen is using irq wait n; which would take at least one cycle waiting for an interrupt to be cleared by HSYNC, for example.

The problem with this method is that it would mess with the timing of the display (if I have 2 sequential ON pixels for example, I can't have a delay between them) and if the last pixel of the display is ON, then the display signal will stay HIGH until a new frame starts (because it is waiting for the irq to be cleared), during the vertical blanking period. And that can't happen.

quaint dagger Mar 29, 2021, 9:51 PM

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small meteor That's how I did it - at the time there was no official way in a boilerplate I c...

Thanks for your help here... this is way at the fringe of my knowledge here. It will take me a while to grok. I feel like I'm better off waiting for SDK v1.1.1

velvet frigate Mar 30, 2021, 12:38 AM

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.program DISPLAY
start:
        irq set 2                       ; Set pause interrupt
        jmp pixel                       ; janky solution to get the order of the code blocks
off:
        set pins, 0                     ; turn signal off
pixel:
.wrap_target
        wait 0 irq 2            ; Check if pause interrupt is set by HSYNC or VSYNC
        out x, 1                        ; Pull one bit from OSR
        jmp !x, off                     ; if bit is 0, jump
        set pins, 1                     ; if bit is 1, turn signal on, wrap back
.wrap

Ok, this is what I came up with. I think it makes sense (though might be just that I'm tired 😅 )
I use some janky code block positioning and used wait 0 irq 2 to stop in case irq 2 is set.
That interrupt is set by either VSYNC or HSYNC during their blanking periods and only reset to 0 by HSYNC when a new line starts (I need to double check timming here but I think it won't be reset during the VSYNC blanking period).
Also I'm not passing OSR straight to the GPIO like before. I'm first passing the value to x and then doing a conditional jump to either turn the pin on or off. This way, each pixel is always 4 cycles long and I the loop is also always listening to an interrupt without having that disturb the number of cycles of a pixel.

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(think I got the jmp !x, off wrong - should be the inverse, but easy fix)

fast walrus Mar 30, 2021, 5:25 PM

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has anyone managed to get a J-Link to flash a Feather RP2040?

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i'm getting ****** Error: Programming failed @ address 0x10000000 (block verification error)

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it seems like it's using a CLKDIV of 4 instead of 2

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but i can't figure out how to set it

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just writing to the register seems to be ignored

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(probably bc the flash is already initialized at that point? not sure)

small meteor Mar 30, 2021, 6:25 PM

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@quaint dagger @fast walrus I generally figure these out on a one-off basis.

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In the case of the flashROM support (QSPI, external) the code says that the generic driver for the flashrom would pretty much work 'if you soldered a potato to your board' - it's very generic.

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CLKDIV is set in the include file the target, iirc.

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If you turn on all compiler warnings you can then:
#warning hello there everybody

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it'll print exactly when it should during a compile - makes tracing what really happens simpler.

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The other way is to introduce a deliberate error into the code - the compiler will halt there, and that's one easy way to prove it did try to compile that one file.

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Then you just undo that edit, resave the file, and continue (satisfied the compiler did use that file).

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 $ ag clkdiv adafruit_feather_rp2040.h 
71:#ifndef PICO_FLASH_SPI_CLKDIV
72:#define PICO_FLASH_SPI_CLKDIV 2
 $ pwd
/some/path/to/pico-sdk/src/boards/include/boards

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'if it's not yet defined, define it as 2'

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Just put in a test there and a #warning to prove the result. ;)

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(make a safety copy first that you never modify)

fast walrus Mar 30, 2021, 7:06 PM

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@small meteor my code is working, I've tested it with the UF2 bootloader

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my issue is just with the J-Link

small meteor Mar 30, 2021, 7:08 PM

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0x10000000 is the bottom of QSPI flashROM space.

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0x20000000 is the bottom of SRAM space.

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0x10040000 is where I store a sample program in flashROM (same address as in the example code for writing flash in your program, for the SDK).

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The Feather has a RESET button in addition to BOOTSEL.

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Might be related to (possibly required) reset function for a J-Link EDU to function at all (I don't know).

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also an RST pin.

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Yeah - I have no idea how a CLKDIV would be set in a J-Link context. ;)

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Maybe erase and write a block of flash in the program.

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flash_range_erase(foo, bar);

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https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/camelforth-b/camelforth-b.c#L85

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That sometimes wakes up the flash (wrong verb).

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Establishes some necessary stuff that doesn't .. I don't know .. get initialized .. by some pathways through the SDK process.

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copy_to_ram didn't seem to need this. but no_flash does need this tweak.

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https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/camelforth-b/CMakeLists.txt#L16

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Summary: flash_range_erase(foo, bar) may solve the problem of flash space visibility. I call this very early in my C/C++ SDK program for RP2040.

queen bay Mar 31, 2021, 10:23 PM

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small meteor guess what's in stock right now *<https://www.adafruit.com/category/875>*

Of course their in stock now! I just purchased one from Waveshare for twice the price this morning...😫

queen bay Mar 31, 2021, 10:33 PM

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fast walrus i'm getting `****** Error: Programming failed @ address 0x10000000 (block verifi...

I would like to help but I haven't figured out how to solder the SWD connector without destroying the Adafruit Feather RP2040 ! How did you get your's mounted?

fast walrus Mar 31, 2021, 10:34 PM

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it was annoying but not that bad

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I just soldered one of the legs on, lined it up, soldered the others, and removed bridges with solder wick

queen bay Mar 31, 2021, 10:41 PM

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fast walrus I just soldered one of the legs on, lined it up, soldered the others, and remove...

The SWD connector I purchased from adafruit leads don't stick out enough for my solder pencil to get to without melting the connector body, I thought about using some flux to stick the connector on the pads then putting the RP2040 into my reflow oven...

fast walrus Mar 31, 2021, 10:42 PM

#

i didn't have any problems with that

#

i was using the pinecil with the stock tip (~~i think it's the TS-100 BC2?~~ TS-B2)

queen bay Mar 31, 2021, 10:45 PM

#

fast walrus i was using the pinecil with the stock tip (~~i think it's the TS-100 BC2?~~ TS-...

I place an order for a set of tips for my Aoyue 968, I'll try the smallest one when they arrive, just wish adafruit would discover the TC2030 concept.

steel shoal Apr 2, 2021, 9:36 PM

#

Question ... does the operating system of the Feather RP2040 provide a means to map a drive so the Feather can access the "near-real-time" data being generated by my game computer and saved in file via the usb connection?

eternal grove Apr 2, 2021, 9:49 PM

#

The RP2040 doesn't have an operating system, it's a microcontroller

#

However I don't know if you can set up dual access to its storage like that or not.

frank quail Apr 3, 2021, 8:55 AM

#

steel shoal Question ... does the operating system of the Feather RP2040 provide a means to ...

using Circuitpython, if you supervisor.disable_autoreload() you can read from the drive as files are put on it. You would likely need to make sure that the computer's OS flushes every write, maybe make them kind of atomic by writing to a temp file and renaming it on the board once finished. I can't promise you won't end up corrupting the drive though...

#

in the arduino world that animated gif project will display animated gifs in a loop from the drive and update as they change https://learn.adafruit.com/pyportal-animated-gif-display

steel shoal Apr 4, 2021, 12:07 AM

#

Thank you madbodger and Neradoc for the advice and recommendations.

quaint dagger Apr 4, 2021, 8:24 PM

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I'm wondering if anyone knows how I might control the NeoPixel on the Feather RP2040 from C/C++. I couldn't find any examples in the pico-sdk.

harsh stratus Apr 5, 2021, 12:04 AM

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@quaint dagger you should be able to use the ws2812 example in the c/c++ sdk documentation

#

As I believe neopixels either use that chip or one that is compatible with it

remote frost Apr 8, 2021, 3:08 AM

#

has anyone interfaced a pdm mic with the rp2040 yet?

#

I couldn't find any tutorials etc

harsh stratus Apr 8, 2021, 8:32 AM

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remote frost has anyone interfaced a pdm mic with the rp2040 yet?

The circuitpython pio asm repo has an example for pdm https://github.com/adafruit/Adafruit_CircuitPython_PIOASM/blob/main/examples/pioasm_pdm.py

GitHub

adafruit/Adafruit_CircuitPython_PIOASM

Simple assembler to convert pioasm to bytes. Contribute to adafruit/Adafruit_CircuitPython_PIOASM development by creating an account on GitHub.

fast walrus Apr 8, 2021, 3:17 PM

#

fast walrus has anyone managed to get a J-Link to flash a Feather RP2040?

update on this: segger got back to me, they've ordered a feather rp2040 for debugging

distant spade Apr 8, 2021, 3:20 PM

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@remote frost the PIO example is what I used for the audiobusio module. The PDMIn class might do what you want without needing PIO directly

wary rampart Apr 12, 2021, 5:43 AM

#

I want to play a 1-bit audio through a buzzer using a Raspberry Pi Pico and microPython.
is that possible?

#

`from machine import Pin
import time

buzz = Pin(15, Pin.OUT)

stream = '010101010...'

for i in range(len(stream)):
buzz.value(int(stream[i]))
time.sleep(1/44100)`

#

drowsy cave Apr 12, 2021, 5:45 AM

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Well the code looks sound. Have you tried it?

wary rampart Apr 12, 2021, 5:48 AM

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I tried but it seems that microPython is not fast enough to turn a pin on and off at very high frequencies, even without the time.sleep() is still slow

#

In case you're wondering, I also have a python script that converts a mono 16-bit .wav audio to a 1-bit .wav

harsh stratus Apr 12, 2021, 7:16 AM

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wary rampart I tried but it seems that microPython is not fast enough to turn a pin on and of...

You could write a pio program to control the gpio pin at a high frequency

small meteor Apr 12, 2021, 12:06 PM

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@wary rampart They're doing video using the RP2040. That dot clock's not slow.

#

Oh, you're using Python. Sorry, my comment doesn't apply, afaik.

patent star Apr 12, 2021, 2:29 PM

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Can anyone point me to a Circuitpython example that uses the PIO for a button input? I can't seem to find one. [edit] going to use the rotary encoder example. I think I found what I need. Thanks.

small meteor Apr 12, 2021, 2:44 PM

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Maybe
https://www.raspberrypi.org/forums/viewtopic.php?t=303087

patent star Apr 13, 2021, 1:20 PM

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I can't find an answer to how quickly the PIO state machines can startup. I seem to recall seeing it somewhere, maybe. How many clocks before a state machine is setup and running? I can imagine it depends on what it will be doing, but I'm more curious about if this is 10 clocks, 1000 clocks, 100000 clocks? Looking for a rough answer.

distant spade Apr 13, 2021, 3:24 PM

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@patent star from what start? the clock is actually running by default. the enable just gates loading the next instruction

patent star Apr 13, 2021, 3:33 PM

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If I create a state machine, in my next line of code I can write to it. What is the time between those two events? The clock rate of the RP2040 Feather is ~125000000. Python is not very deterministic by nature, but this process probably is, I'm guessing. Does it happen in one clock?

distant spade Apr 13, 2021, 5:04 PM

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if you are running from python it's definitely not the next clock

#

the VM takes time

patent star Apr 13, 2021, 5:56 PM

#

Why do I get the error that the frequency is too low? It seems anything less than ~2000 gives this error. I have this driving an A4988 chip MUCH better than I could with Circuitpython. The movement is much smoother. I'm trying to understand the "frequency" input now. It's not making sense yet. I mean, I understand it, but what I'm setting and what I'm seeing are not lining up...yet.

patent star Apr 13, 2021, 8:14 PM

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I must say, the motion I'm getting out of this A4988 using a Pulse/Direction/Enable is very smooth. I'm also able to achieve step rates similar to my native drive solution, with similar smoothness. I have not been able to attain this yet via Circuitpython. I was at one point, using the PWM module and feeding it huge arrays, but the technique I've come up with today is quite nice compared to that. By adjusting the frequency and pulsing a square wave with a counter, and feeding these values, the RP2040 is keeping up no problems. I have a rotary encoder connected, and I still have some missing steps to find here and there, but overall, this chip is awesome!

small meteor Apr 13, 2021, 8:58 PM

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Pre-built .UF2 with source - CamelForth in C for ItsyBitsy RP2040

https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/tree/dvlp-aa__itsyBitsy_exp-a-/pre-built-uf2.d/3-Itsy_COPY_TO_RAM.d

distant spade Apr 13, 2021, 9:58 PM

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@patent star the limit is ~2000 because the divider can only divide the 125mhz down that far

patent star Apr 14, 2021, 1:10 AM

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I figured it was as much.

#

Been thinking of a way around that. I think it's possible with the built in [waits]

wraith storm Apr 14, 2021, 2:11 AM

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pio should be able to do pretty arbitrarily low frequencies

fast walrus Apr 14, 2021, 2:14 PM

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fast walrus update on this: segger got back to me, they've ordered a feather rp2040 for debu...

they just emailed me that they've fixed the issue and it'll be in version 7.00a

patent star Apr 14, 2021, 8:05 PM

#

Every instruction in a state machine takes one clock cycle, or 1/125_000_000Hz. If my state machine has 4 instructions, the fastest it can run at is 125_000_000/4, right?

distant spade Apr 14, 2021, 8:10 PM

#

correct

exotic moth Apr 14, 2021, 8:24 PM

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@patent star It doesn't like some duplicated words in your post... Apologies.

patent star Apr 14, 2021, 8:24 PM

#

It's a codeblock...

#

that uses the "`" thing, right?

exotic moth Apr 14, 2021, 8:25 PM

#

It's there for a reason, but it's not smart enough to know the difference between good and bad.

patent star Apr 14, 2021, 8:25 PM

#

one at each end?

exotic moth Apr 14, 2021, 8:25 PM

#

Yes that's a code block. Code can trigger the bot at times.

#

Can you DM it to me?

#

I'll post it here for you.

#

    .program blink_a_number_of_times
        pull block          ; wait until the loop counter is read
        out x 32            ; and store it in x
        set pins 0          ; explicitly set pin low
    loop_start:             ; start of our loop
        set pins 1 [1]      ; set the given pin to 1 and wait 1 clock
        set pins 0          ; set the given pin to 0
        jmp x-- loop_start  ; jump to loop_start if x is not zero
    """```

patent star Apr 14, 2021, 8:26 PM

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Thanks! This code block is 6 clocks long, with a 4 clock nested loop, right?

#

sorry, 7

#

I had deleted the first set pins 0 line before

small meteor Apr 14, 2021, 11:11 PM

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The C/C++ pico-sdk limits ItsyBitsy RP2040 to 4 MB.

#

CircuitPython seems pretty sure it's 8 MB ;)

#

I haven't tried it on the hardware, in CircuitPython, to test: just in the C/C++ sdk.

#

(where it hard faults or something like that, past 0x103FFFFF, on an erase.)

https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/dvlp-aa/17-camelforth-b.d/pico-examples/camelforth-b/forth/rp2040_flash_ops.inc#L67

#

https://github.com/raspberrypi/pico-sdk/blob/master/src/boards/include/boards/adafruit_itsybitsy_rp2040.h#L83

#

vs
https://github.com/adafruit/circuitpython/blob/main/ports/raspberrypi/boards/adafruit_itsybitsy_rp2040/mpconfigboard.mk#L9

#

vs
https://github.com/adafruit/circuitpython/blob/main/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.mk#L9

#

Subjectively the ItsyBitsy seems way (way) faster to erase flash than either the RPi Pico or the Feather RP2040.

#

The feather probably runs the generic (slow) flash driver, but I had thought the Pico did not.

#

I don't care, I'm happy enough as it is .. I'm just yip-yappin' ;)

distant spade Apr 14, 2021, 11:52 PM

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@small meteor it's a bug. I think thach will be making a PR for it

small meteor Apr 14, 2021, 11:56 PM

#

@distant spade Thanks! I had no problem working around it as I don't even need the full 4 MB by any means. Thanks for the reply!

rustic mica Apr 14, 2021, 11:58 PM

#

hey

#

How do I make my micropython code stay on my pi pico

#

when I unplug and replug I have to reflash the code

#

Im new to micropython

#

I want it to be like arduino so the code stays on it till I put some other code on it

#

I am using MU but I also have thorny

small meteor Apr 15, 2021, 12:08 AM

#

@rustic mica For CircuitPython I think you see the flash as a thumb drive-like device on your host PC.

#

drag and drop your code.py onto that device, or edit the file.

rustic mica Apr 15, 2021, 12:08 AM

#

And I just put the python file on it?

small meteor Apr 15, 2021, 12:08 AM

#

The main kernel remains resident all the time.

rustic mica Apr 15, 2021, 12:08 AM

#

ok tysm will try

small meteor Apr 15, 2021, 12:09 AM

#

It's a resident interpreter that treats part of flash as mass storage.

#

micropython may be very similar - haven't tried it.

rustic mica Apr 15, 2021, 12:10 AM

#

It does not appear in my computer

small meteor Apr 15, 2021, 12:11 AM

#

But you have a REPL? (interpreter you can type into)

rustic mica Apr 15, 2021, 12:11 AM

#

Yes

small meteor Apr 15, 2021, 12:11 AM

#

Control C (I think) interrupts a running program and Control D reloads your program from flash.

#

(been a while for me; I use the C/C++ sdk mostly)

rustic mica Apr 15, 2021, 12:12 AM

#

#

run only runs it temporary

small meteor Apr 15, 2021, 12:13 AM

#

Yeah you have to get to the 'filesystem' to edit code.py or whatever micropython is using.

#

Basically you use the REPL to design small blocks of code; then copy them to a permanent file like code.py, if I'm not mistaken.

#

The REPL is nice because you can hit the TAB key to complete things you're not sure about; it'll list choices that make sense in the current context.

#

It also presents things with proper indentation.

distant spade Apr 15, 2021, 12:15 AM

#

micropython's file needs to be called main.py

small meteor Apr 15, 2021, 12:16 AM

#

https://datasheets.raspberrypi.org/pico/raspberry-pi-pico-python-sdk.pdf

rustic mica Apr 15, 2021, 12:16 AM

#

distant spade micropython's file needs to be called `main.py`

The program Im writing rn?

distant spade Apr 15, 2021, 12:18 AM

#

the one you want to run automatically

rustic mica Apr 15, 2021, 12:18 AM

#

ok

#

thx

distant spade Apr 15, 2021, 12:18 AM

#

in circuitpython main.py or code.py will work

small meteor Apr 15, 2021, 12:20 AM

#

Enter the code in the main panel, then click on the green run button. Thonny will present you with a popup, click on ..

#

_ .. "MicroPython device" and enter "test.py" to save the code to the Raspberry Pi Pico, see Figure 5._

#

on page 28 of that PDF.

#

So Thonny is used to save your code onto the flash permanently (well, semi-permanently ;)

#

You have to update Thonny to the latest and greatest, as the Pico is brand new:

The Raspberry Pi Pico interpreter is only available in the latest version of Thonny.

#

That might be why you haven't seen it yet, if that's what's going on.

#

(the instructions are oriented to Raspberry Pi as the 'host PC' I think)

rustic mica Apr 15, 2021, 12:25 AM

#

Ok finally worked thanks so much for the help

small meteor Apr 15, 2021, 12:28 AM

#

wow that's great.

wary rampart Apr 15, 2021, 6:04 AM

#

The same thing happened to me, I learned through a video on YouTube that I needed to rename my program as main.py if I wanted my program to run without dependency on a computer

modern anchor Apr 16, 2021, 7:42 PM

#

has anybody got pico SDK running on one core while circuit/micropython (either would work but circuit would be preferred) running on the other

thin edge Apr 17, 2021, 3:04 AM

#

Hi everyone

harsh stratus Apr 17, 2021, 5:44 AM

#

@modern anchor I haven’t seen anyone with it working but Scott has talked about it on one of his deep dives.

thin edge Apr 17, 2021, 6:41 AM

#

please help.. I was moving files around the lib folder in my pico. then suddenly I can't do anything with it. It says the file system is in read-only 😦

#

whenever I try to delete or create a file/folder, this error comes up

#

tried plugging the pico on a different Linux machine. Still getting the same error. Same with when I try to delete or create in Linux file manager or shell

#

😦

thin edge Apr 17, 2021, 7:17 AM

#

fixed! I just needed to do a storage.erase_filesystem in REPL

#

file system got corrupted. I thought it's ok to just unplug this thing without ejecting from Linux.

fast walrus Apr 17, 2021, 10:56 PM

#

feather rp2040 works great with j-link software v7.00a and pico-sdk 1.1.2

thin edge Apr 18, 2021, 10:36 AM

#

anyone here able to get MLX90614 working with pi pico rp2040?

rustic mica Apr 18, 2021, 1:59 PM

#

Ok so I have my pi pico set up with micropyhon but now I want to program it with arduino IDE but its not working, What to do?

#

#

yeah I have the pico board installed in the IDE, and the correct port...

small meteor Apr 18, 2021, 7:56 PM

#

@rustic mica The SDK creates an .UF2 which you drag and drop onto the Pico at operating system level.

#

If you find where the Arduino IDE deposits the .bin and .elf files that's probably where it puts the .uf2 if it even exists.

rustic mica Apr 18, 2021, 7:57 PM

#

And do I have to hold the bootsel btn?

small meteor Apr 18, 2021, 7:57 PM

#

Yeah.

rustic mica Apr 18, 2021, 7:57 PM

#

Thank you!

small meteor Apr 18, 2021, 7:58 PM

#

The BOOTSEL is a physical enable line; it enables or disables the standard boot off the flashROM, by (I think) omitting (or connecting) the Chip Select line of the physical flashROM chip itself.

#

(other folks):
https://www.tomshardware.com/how-to/program-raspberry-pi-pico-with-arduino-ide
then
https://github.com/earlephilhower/arduino-pico

#

Haven't done this myself.

#

There is automated discovery of boards in bootloader mode, so they show up in the IDE, and the upload command works using the Microsoft UF2 tool (included).

#

https://arduino-pico.readthedocs.io/en/latest/install.html#uploading-sketches

#

This sounds interesting:
The onboard flash filesystem for the Pico, LittleFS, lets you upload a filesystem image from the sketch directory for your sketch to use.

rustic mica Apr 18, 2021, 8:59 PM

#

small meteor <@!577600075774165012> The SDK creates an `.UF2` which you drag and drop onto th...

Where do I find the .uf2?
Is it something it makes for each skecth?

small meteor Apr 18, 2021, 8:59 PM

#

If it exists, in Linux, it's under /tmp I think.

#

It'll be in the same directory as the .bin and the .elf and the .hex iirc.

#

Yeah it's there.

rustic mica Apr 18, 2021, 9:15 PM

#

Im looking in Appdata bc im on windows

small meteor Apr 18, 2021, 9:15 PM

#

/tmp/arduino_build_12345/Fade.ino.uf2 for example.

#

I'll try to use that UF2 without following instructions. ;)

rustic mica Apr 18, 2021, 9:16 PM

#

It should be here?

#

small meteor Apr 18, 2021, 9:18 PM

#

It worked first try. I did nothing new - just dragged and dropped the generated .uf2 exactly as if the C/C++ SDK had produced itt.

rustic mica Apr 18, 2021, 9:19 PM

#

I dont find any .uf2

#

small meteor Apr 18, 2021, 9:20 PM

#

I just noticed that. ;)

#

I didn't DO anything. IT Just Happened.

#

I built the Fade.ino sketch from the menus.

#

After following the 'git install' instrux on that github for this.

#

https://github.com/earlephilhower/arduino-pico#installing-via-git

#

Obviously the syntax given works in Linux without alteration.

#

On Feather RP2040, I pressed and held one button, and briefly pressed and released the other button.

#

That exposed the RPI-RP2 drive whatevers.

#

Then I dragged and dropped using operating system tools.

#

The UF2 was under /tmp as I mentioned.

#

Along with the let's see:
Fade.elf
Fade.map

#

There was no Fade.bin ;)

small meteor Apr 18, 2021, 9:44 PM

#

Here's a log, including an error when trying to use the automated system (Control U for compile and upload):

https://termbin.com/m8mh

#

I didn't look for udev rules foo (yet).

small meteor Apr 18, 2021, 10:22 PM

#

https://github.com/wa1tnr/rp2040-arduino-basics-a/tree/dvlp-aa/_test-a.d/fade-test-ab

#

To upload I double-clutch: use both Feather RP2040 board buttons, and pick off the .UF2 from my arduino /tmp build directory .. every single time.

#

A bit slower but not different from the C/C++ SDK manual method.

#

(My C/C++ SDK programs have a 'reflash' word in Forth for this, so no button pressin' needed).

small meteor Apr 18, 2021, 10:45 PM

#

This one starts up the USB drive just like if you'd done it yourself using the hardware buttons on the Feather RP2040, from within the Arduino IDE context and resultant .UF2 file:

#

https://github.com/wa1tnr/rp2040-arduino-basics-a/blob/main/_test-a.d/fade-test-ac/fade-test-ac_SKETCH.cpp#L44

#

Did --no-- CMakeLists.txt foo .. none.

#

That's a big advantage for a beginner, I think.

#

as an aside, the one python script used to install this IDE wasn't invasive, from what I saw.

#

Seemed to be used similarly to a bash shell script.

iron sorrel Apr 19, 2021, 3:44 PM

#

Got my Waveshare Pico 1.4 LCD running https://www.waveshare.com/wiki/Pico-LCD-1.14

wraith storm Apr 21, 2021, 6:16 PM

#

the PICO pin-out reference shows ADC_VREF on pin 35, but the CP microcontroller and board modules I think call that pin GPIO29, and A3. Does it behave like a normal ADC input?

#

nvm, figured it out from the reference docs. GPIO29/A3 isn't exposed on the pinout

ebon lily Apr 23, 2021, 4:43 PM

#

is it possible to put some code running on the 2nd core?

#

the idea is for thart code to deal with display, serial and buttons

vivid pewter Apr 24, 2021, 9:57 AM

#

I'm sure there are a few people trying to pave that road

ebon lily Apr 24, 2021, 10:32 AM

#

me too :x

small meteor Apr 26, 2021, 4:52 PM

#

Feather RP2040 showing stock on the Adafruit store. ;)

#

max per customer: 10! lol

#

"I wanted eleven." ;)

#

"One for every day of the week."

#

My new odd, forth-like thing for RP2040:

https://github.com/wa1tnr/rp2040-arduino-basics-a/tree/main/monitor.d/monitor-hh-p

#

Uses a switch/case construct to create a small virtual machine.

#

Current sample run (aka like a screen shot) here:

https://github.com/wa1tnr/rp2040-arduino-basics-a/blob/main/monitor.d/doc/sample_run-ggg.txt

#

Uses four bytes per instruction and spells out their names in three of those four bytes. ;)

#

So, 16 kb RAM holds an equivalent of a 4kb 8-bit program.

viral belfry Apr 27, 2021, 12:28 AM

#

newb question, but is it correct to say that in order to use the RP2040's 8MB on board storage to store measurements, I have to do something like what's in this guide: https://learn.adafruit.com/circuitpython-essentials/circuitpython-storage

Adafruit Learning System

CircuitPython Essentials

The next step in learning CircuitPython.

#

where I basically create a boot.py script to watch for a pull in order to flip the memory system?

frank quail Apr 27, 2021, 12:43 AM

#

yes pretty much

storm heath Apr 27, 2021, 12:46 AM

#

@viral belfry You can either have the "CIRCUITPY" drive be writeable from your host computer or be able to write to the Flash from CircuitPython. You can't do both at the same time. You don't want to ;-). The choice has to be made in boot.py.

floral moth Apr 27, 2021, 4:34 AM

#

I'm having trouble loading CircuitPython on my RP1-RP2 as per TouchBox learn guide. I drag&drop the UF2 file in the RP1-RP2 boot which then disappears but the CIRCUITPY drive does not show up on my Mac destop. Any ideas? Thanks

distant spade Apr 27, 2021, 5:20 PM

#

@floral moth what version of circuitpython are you trying to use?

floral moth Apr 27, 2021, 5:28 PM

#

I'm accessing it from the touch deck guide which leads me to https://learn.adafruit.com/adafruit-feather-rp2040-pico/circuitpython which leads me to https://circuitpython.org/board/adafruit_feather_rp2040/ which states 6.2.0 BTW Scott fingers crossed for Hackaday Supercon in Pasadena this year- a.k.a Marie

Adafruit Learning System

Introducing Adafruit Feather RP2040

RP2040 in the Feather form!

CircuitPython - Feather RP2040 Download

A new chip means a new Feather, and the Raspberry Pi RP2040 is no exception. When we saw this chip we thought “this chip is going to be awesome when we give it the Feather Treatment” and so we did! This Feather features the RP2040, and all niceties you know and love about Feather Measures 2.0” x...

#

Also I'm doing this on my MacBook and just finish other projects using CPX just fine but no success with new feather RP2040. I also tried to use my iMac to see if that made a difference but the RP2040 would not work at all when connected to iMac, power was there but LED does not illuminate, pushing BOOTSEL and reset resulted in nothing. Both computers use BigSur OS.

distant spade Apr 27, 2021, 6:04 PM

#

floral moth Also I'm doing this on my MacBook and just finish other projects using CPX just ...

anything in sudo dmesg?

floral moth Apr 27, 2021, 6:09 PM

#

asks for password, I haven't a clue 😭

distant spade Apr 27, 2021, 6:10 PM

#

you could try just plain dmesg

#

though I think it expects admin privileges

#

can you get to the serial connection?

floral moth Apr 27, 2021, 6:16 PM

#

I used my admin password but it was not accepted. Oops, tried again it worked

#

(base) Maries-MBP-3:UTILS mariemeyer$ ls /dev/tty.*
/dev/tty.Bluetooth-Incoming-Port /dev/tty.URT1
/dev/tty.Maker-2546-RN-iAP-24 /dev/tty.URT2
/dev/tty.MariesAirPods-Wirelessi-1

distant spade Apr 27, 2021, 6:17 PM

#

hrm, no usb serial

#

anything in dmesg about the feather RP2040?

floral moth Apr 27, 2021, 6:33 PM

#

I get pages of text but nothing with RP2040, though the board is working as I did load PID4884_test.uf2

#

Interseting when I just us dmesg I get: Unable to obtain kernel buffer: Operation not permitted
usage: sudo dmesg and when I use sudo dmesg I get pages most of which is meaningless to me 😭

floral moth Apr 27, 2021, 8:22 PM

#

@distant spade just to see I connected CPX to my MacBook and it too does not show up in serial connection. What has Apple done to me😩

frank quail Apr 27, 2021, 8:31 PM

#

it's a good question, since I can see my neopixel trinkey and QT PY 2040 on a Big Sur macbook (intel)

distant spade Apr 27, 2021, 8:59 PM

#

floral moth <@!252717193496756235> just to see I connected CPX to my MacBook and it too does...

Try restarting your computer if you haven't. I did have times where I felt like my mac blacklisted my devices

floral moth Apr 27, 2021, 10:44 PM

#

@distant spade Restart didn't seem to help

distant spade Apr 27, 2021, 10:44 PM

#

hrm, weird

floral moth Apr 27, 2021, 10:45 PM

#

@distant spade yes, very

distant spade Apr 27, 2021, 10:47 PM

#

the bootloader works but circuitpy doesn't?

floral moth Apr 27, 2021, 10:55 PM

#

@distant spade yes, I gather this is true as I can load the test uf2 file on the RP1-RP2 that appears on the desktop but when I load Circuitpython on RP1-RP2 it will disapear from the desktop but the CIRCUITPY drive does not appear and the RP2040 no longer functions till I reload the test file.

distant spade Apr 27, 2021, 10:55 PM

#

have you tried the nuke uf2 file?

floral moth Apr 27, 2021, 10:56 PM

#

no, I'm not aware of it

distant spade Apr 27, 2021, 10:57 PM

#

that'd be worth doing

floral moth Apr 27, 2021, 10:57 PM

#

how do I do that?

distant spade Apr 27, 2021, 10:58 PM

#

https://learn.adafruit.com/getting-started-with-raspberry-pi-pico-circuitpython/circuitpython#flash-resetting-uf2-3083182-8

Adafruit Learning System

Getting Started with Raspberry Pi Pico and CircuitPython

CircuitPython for Pico will get you started in minutes!

floral moth Apr 27, 2021, 10:59 PM

#

I'm looking in getting started pico....you bet me to it HaHa

#

@distant spade OK I nuked it, then download cricutpython to it but the result is the same, boot drive disappears and circuitpy drive never appears

distant spade Apr 27, 2021, 11:10 PM

#

what is the example code that works? could you take a pic of the flash chip on it?

floral moth Apr 27, 2021, 11:16 PM

#

PID4884_test.uf2, it's my understanding that this boards are shipped with this file

distant spade Apr 27, 2021, 11:17 PM

#

ya, that's baked into the rp2040 rom

#

I'm curious about the physical chip on the board

#

where does the test uf2 come from?

floral moth Apr 27, 2021, 11:19 PM

#

From here: https://learn.adafruit.com/adafruit-feather-rp2040-pico/downloads

#

distant spade Apr 27, 2021, 11:20 PM

#

hrm, that looks right

#

the top right chip is the flash

#

does the status led do anything after CP is loaded?

floral moth Apr 27, 2021, 11:23 PM

#

better view

#

this is how the sits after CP load

#

But when running the test uf2 13 flashes

#

distant spade Apr 27, 2021, 11:26 PM

#

I don't know what the test uf2 is

#

is the green fading in and out?

#

with CP

floral moth Apr 27, 2021, 11:29 PM

#

I'm referring to the PID4884 file, the green fades to other colors

distant spade Apr 27, 2021, 11:34 PM

#

where did you get that file?

floral moth Apr 27, 2021, 11:35 PM

#

from here: learn.adafruit.com/adafruit-feather-rp2040-pico/downloads

#

distant spade Apr 27, 2021, 11:37 PM

#

ah

#

my mind skipped the green button

#

I suspect that is pico-sdk code rather than circuitpython

floral moth Apr 27, 2021, 11:41 PM

#

That's the issue I can't get CP to load. I was attempting to construct John Park's Touch Deck project

distant spade Apr 27, 2021, 11:42 PM

#

I think it is loading if the neopixel is green after you copy CP over

floral moth Apr 27, 2021, 11:45 PM

#

No it's just were the PID4884 program stopped, sometimes it's green, somtimes blue, and sometimes red, just depends at what point the program was interrupted and I don't think CP is every copied over as the cricutpy drive never appears.

distant spade Apr 27, 2021, 11:46 PM

#

I doubt that it's failing to copy CP over

#

it might be that the flash isn't starting up correctly

#

you could try the 6.2.0 beta releases

#

there were some changes in the flash code so an older one may work

floral moth Apr 27, 2021, 11:47 PM

#

OK, give me a moment

#

Can't seem to get there, I go to github for eariler CP but sends me to the https://circuitpython.org/board/raspberry_pi_pico/ which is where I statred but no option to select eariler version. Obviously I'm missing something

CircuitPython - Pico Download

The Raspberry Pi foundation changed single-board computing when they released the Raspberry Pi computer, now they’re ready to do the same for microcontrollers with the release of the brand new Raspberry Pi Pico. This low-cost microcontroller board features a powerful new chip, the RP2040, and all...

frank quail Apr 27, 2021, 11:58 PM

#

just to super triple double check, the file name for circuitpython is adafruit-circuitpython-adafruit_feather_rp2040-en_US-6.2.0.uf2 and is 499kB ?

distant spade Apr 27, 2021, 11:58 PM

#

click "absolute latest" the S3 bucket has older versions too

#

ah! that'd do it too

#

the link from 10:28am this morning has the right circuitpython.org link

frank quail Apr 27, 2021, 11:59 PM

#

you did link to the right cp.org page, so I assumed it was good, but please check

#

(I picked en_US, you might use another language, though try with en_US in that case, just to see)

floral moth Apr 28, 2021, 12:04 AM

#

https://circuitpython.org/board/raspberry_pi_pico/ I don't see an option to select other CP versions

CircuitPython - Pico Download

The Raspberry Pi foundation changed single-board computing when they released the Raspberry Pi computer, now they’re ready to do the same for microcontrollers with the release of the brand new Raspberry Pi Pico. This low-cost microcontroller board features a powerful new chip, the RP2040, and all...

#

https://github.com/adafruit/circuitpython/releases this page tells me to go to the link show above

GitHub

Releases · adafruit/circuitpython

CircuitPython - a Python implementation for teaching coding with microcontrollers - adafruit/circuitpython

distant spade Apr 28, 2021, 12:08 AM

#

the link above is not for the feather

frank quail Apr 28, 2021, 12:08 AM

#

the link for the feather is https://circuitpython.org/board/adafruit_feather_rp2040/, you get to it by selecting the feather rp2040 from https://circuitpython.org/downloads

#

the file is adafruit-circuitpython-adafruit_feather_rp2040-en_US-6.2.0.uf2

floral moth Apr 28, 2021, 12:12 AM

#

That's exactly were I was.

frank quail Apr 28, 2021, 12:14 AM

#

6.2.0 beta versions are at the bottom: https://adafruit-circuit-python.s3.amazonaws.com/index.html?prefix=bin/adafruit_feather_rp2040/en_US/

#

(from the "Browse S3" link in the download page)

floral moth Apr 28, 2021, 12:18 AM

#

WOW!!!! That worked I now have the circuitpy dive on my desktop. I use beta 4

#

#

Just an FYI

#

@distant spade Scott thank you so much, I learned quite a bit today

#

@frank quail Thank you so so much

frank quail Apr 28, 2021, 12:23 AM

#

ah

distant spade Apr 28, 2021, 12:24 AM

#

you can see if rc.0 works

#

it redid the flash stuff

floral moth Apr 28, 2021, 12:24 AM

#

@distant spade FYI the LED now flashes green

#

rc.0?

small meteor Apr 28, 2021, 12:27 AM

#

IF you run out of stuff to try, this will give you an interactive tty and blink the LED prior to connection:
https://github.com/wa1tnr/rp2040-arduino-basics-a/tree/main/monitor.d/monitor-hh-p/prebuilt_uf2.d/feather-rp2040.d

floral moth Apr 28, 2021, 12:28 AM

#

cool

small meteor Apr 28, 2021, 12:32 AM

#

13 wiggle toggles D13 several times.

#

quit exits and reflashes. ;)

#

fyi I never do see a drive in Linux, except RPI_RP2 and that's not mounted. Not in df report.

#

oops wrong - it does get mounted when I click on it. ;)

#

 $ sudo blkid | egrep sdb
/dev/sdb1: SEC_TYPE="msdos" LABEL_FATBOOT="RPI-RP2" LABEL="RPI-RP2" TYPE="vfat"

#

I see a 12-digit serial number in dmesg - in hexadecimal.

floral moth Apr 28, 2021, 12:38 AM

#

Interesting since I've use sudo dmesg and the RP1-RP2 never shows nor does it appear when ls /dev/tty.* is used

small meteor Apr 28, 2021, 12:38 AM

#

if 'aspberry' isn't in dmesg, then it's not showing (not in Linux anyway)

floral moth Apr 28, 2021, 12:39 AM

#

Not in Mac either

small meteor Apr 28, 2021, 12:41 AM

#

 $ sudo dmesg | egrep "Raspb|alNum"

#

That picks up the branding and the serial number here.

#

Maybe if you install the C/C++ SDK it sets up some magic foo to make it all work smoothly.

left vortex Apr 28, 2021, 2:05 PM

#

hi

#

i have ordered rp pico

#

if i make an application with rp2040 with micropyhthon

#

later can i replace rp2040 wth another arm cortex mcu?

exotic moth Apr 28, 2021, 2:13 PM

#

left vortex later can i replace rp2040 wth another arm cortex mcu?

I think it depends on how specific your application is to the RP2040. In theory, yes, you could replace it. But it may not be a drop-in replacement, it might require some modifications.

left vortex Apr 28, 2021, 2:17 PM

#

thank you @exotic moth i am thinking to make an AI application with camera and speaker

#

if i can manage to make it

exotic moth Apr 28, 2021, 2:19 PM

#

The issue will be if you utilise any features of the RP2040 that aren't present in other ARM Cortex MCUs. If you're simply using it to run the hardware, you'll need to update pin names most likely, but that would be it.

left vortex Apr 28, 2021, 2:23 PM

#

it is a good news 🙂

#

can i use same micropython code on other arm cortex mcu to?

exotic moth Apr 28, 2021, 2:31 PM

#

I don't know MicroPython, unfortunately, so I can't be certain. If it works like CircuitPython in that sense, then yes, the same code should work, you would simply need to update the pin names to match the new hardware.

#

I believe it does work that way though.

#

The time the MicroPython cares about what hardware you have is when you tell it on what pins to look for your camera and speaker. So on Pico, GPIO24 and GPIO25, let's say. Then you want to use a SAMD51 or something, and maybe the pins are GPIO6 and GPIO7 or something. You would need to update that part of your code, but, in theory, that's all that would need updating. The rest should continue to work.

#

Unless you use the PIO feature of the Pico, for example, which isn't available on a SAMD51. Then it won't quite be that simple.

left vortex Apr 28, 2021, 2:50 PM

#

should i choose circiutpython over micropython for better standardization?

exotic moth Apr 28, 2021, 2:52 PM

#

That's entirely up to you. I don't think you'll get any better standardisation out of one over the other. If you're new to programming, CircuitPython is much easier to start with. If you're desperate for threading and interrupts, MicroPython is the way to go. Both have their strengths and it depends on your project. You should check out whether there is support (e.g. libraries) for your camera in either one, and if only one has support, that would answer your question easily. If they both have support for it, then you'll need to decide for yourself.

left vortex Apr 28, 2021, 2:54 PM

#

thank you very much @exotic moth

#

your answers was very informative

exotic moth Apr 28, 2021, 2:54 PM

#

You're entirely welcome. Good luck with your project!

ebon lily Apr 29, 2021, 9:45 AM

#

https://shop.pimoroni.com/products/pico-rgb-keypad-base

^ does anyone know if it is possible (at all) to use this with circuitpython?

im building my macro keyboard thingy and i want to write it all in circuitpython, because of the displayio libraries, and i can only find the micropython uf2 images or the c++ sourcecode :/

Pico RGB Keypad Base

Connect a glorious, squishy, 4x4 rainbow-illuminated keypad to your Raspberry Pi Pico - perfect for making a custom USB input device!

chrome osprey Apr 29, 2021, 11:50 AM

#

ebon lily https://shop.pimoroni.com/products/pico-rgb-keypad-base ^ does anyone know if i...

Unfortunately, there is no CircuitPython library for the TCA9555 which is used to read the buttons. However, looking at the Datasheet and the Pimoroni C++ code for MicroPython it shouldn't be too hard to write one if you're feeling up to it.

ebon lily Apr 29, 2021, 1:22 PM

#

i first need to buy it to test, but i am willing to throw something together

small meteor May 1, 2021, 1:10 AM

#

Just look at the example code they give (if they give example code).

#

Says APA102 those are DotStar RGB's.

#

Also says MicroPython library is provided.

#

This is likely to be a good starting point:

https://github.com/pimoroni/pimoroni-pico

#

Here also:
https://github.com/pimoroni/pimoroni-pico/tree/main/libraries/pico_rgb_keypad

#

"Our Pico Keypad Pack offers a 4x4, squishy, RGB illuminated keypad for the Raspberry Pi Pico. The buttons are read via an i2c IO expander and the LEDs are APA102s driven by SPI."

ebon lily May 1, 2021, 1:21 AM

#

all the source code is in c++, and they provide their own micropython uf2 file instead of the .mpy libraries

#

but i want to use circuitpython with it

small meteor May 1, 2021, 1:22 AM

#

This looks like something related to porting it over:

https://github.com/pimoroni/pimoroni-pico/tree/main/micropython/modules/pico_rgb_keypad

#

For fifty cents I'm going to guess 'you have to port that code to work with CircuitPython'.

ebon lily May 1, 2021, 1:23 AM

#

i already knew i would have to rewrite it

small meteor May 1, 2021, 1:23 AM

#

;)

#

I do this stuff all the time when I want it and cannot wait. ;)

ebon lily May 1, 2021, 1:23 AM

#

at least the code seems like it was made for humans to read

small meteor May 1, 2021, 1:24 AM

#

(and somehow remain largely ignorant of the system I'm porting with, and to.) ;)

#

Basically you whack-a-mole until all compiler errors are gone. Then the code is correct from a compiler standpoint. May do little that's wanted, but it doesn't break the compiler.

#

Then figure out why it compiles but doesn't run correctly.

#

If your memory is good (human memory) you'll remember some or all of the places you just punted and did what your intuition told you to do.

#

Some of those guesses will be wrong.

#

diff helps quite a bit, there.

#

Shows you what you changed (old and new lines).

#

git diff is even better since it keeps a history of them, as the code evolves.

ebon lily May 1, 2021, 1:29 AM

#

🤦

#

dang it bot

#

but yeah, i use git, a lot ...

#

(like, not at all)

#

it never cost me anything at all, oh no no

#

(until a bug in circuitpython literally destroyed over 10 hours of work)

small meteor May 1, 2021, 1:33 AM

#

haha

#

Well I decided to. Didn't know or see the value; and then: I did.

#

I would say 'learn git or learn mercurial' due to a recent conversation I had.

#

But learn one of them.

#

https://www.mercurial-scm.org/

ebon lily May 1, 2021, 1:35 AM

#

git is good, but i see it as a huge barrier and a huge obstacle on development for this stuff

#

but that's a me-problem

small meteor May 1, 2021, 1:35 AM

#

It's an investment and no, it won't write code for you. ;)

#

A lot of people just use git as a code repository, without ever using the commit-changes features.

#

Or branches.

#

"I didn't know when I started it was this kind of a time commitment."

ebon lily May 1, 2021, 1:37 AM

#

i want to use git for it, but it's always a pain for me

small meteor May 1, 2021, 1:38 AM

#

Heh. What do you use to interact with git .. a web browser?

ebon lily May 1, 2021, 1:39 AM

#

i've used the webbrowser, i used vscode, i used the annoying windows program thingy, i used the bitbucket thingy... i can't really deal with it

small meteor May 1, 2021, 1:39 AM

#

kattni wrote some tutorial materials related to git. Links should be in the git #channel.

#

I didn't like it much when I started using it. I still sort-of remember.

#

diff is more straightforward.

#

diff thisfile thatfile

#

diff is designed for a companion program called patch

#

The output of diff is applied to an older revision, using patch .. to update to the newer code.

ebon lily May 1, 2021, 1:42 AM

#

yeah, i know that part

small meteor May 1, 2021, 1:42 AM

#

Wikipedia article edit history uses a similar idea.

#

You can build a birdhouse with a hand saw and a hammer and a drill.

#

But you're not going to do cabinetmaking with just those tools.

#

Same is true of software-building 'tools'.

ebon lily May 1, 2021, 1:46 AM

#

i just make it work, somehow

#

but when i get that board, i guess i will have to just bang my head till it works

small meteor May 1, 2021, 1:50 AM

#

APA102 can be bit-banged - no driver required. i2c is hard to do poorly. ;)

ebon lily May 1, 2021, 1:51 AM

#

well, it's not that hard

#

coming from someone that can screw anything

#

i basically, somehow, managed to destroy the flash of my pico pi trying to write a file to it

small meteor May 1, 2021, 1:58 AM

#

The RPi Pico RP2040 board (and the clones) have a permanent bootloader.

ebon lily May 1, 2021, 1:58 AM

#

yeah, i destroyed everything on it

#

except that bootloader

small meteor May 1, 2021, 1:58 AM

#

iirc the address of the loader is 0x0 or very low in the memory map, ending around 0x2000 or 0x4000 iirc.

#

Unless I'm mistaken.

ebon lily May 1, 2021, 1:59 AM

#

well, i ruined it

#

the only way to make it operational was to nuke it with the nuke_flash.uf2 file

small meteor May 1, 2021, 1:59 AM

#

and

ebon lily May 1, 2021, 2:00 AM

#

i lost my code

small meteor May 1, 2021, 2:00 AM

#

Oh I see, you didn't damage the hardware at all.

#

You lost your work. ;)

ebon lily May 1, 2021, 2:01 AM

#

over 10 hours banging my head to convert this:
https://github.com/adafruit/Adafruit_CircuitPython_HID/blob/master/adafruit_hid/keycode.py

to make it work with my keyboard and other non-us symbols

GitHub

adafruit/Adafruit_CircuitPython_HID

USB Human Interface Device drivers. Contribute to adafruit/Adafruit_CircuitPython_HID development by creating an account on GitHub.

small meteor May 1, 2021, 2:01 AM

#

Sure. So, get started doing it again before you forget all your insights.

#

In 30 days they'll be gone, probably.

#

I wrote a beautiful 8051 SMBus (i2c) driver program.

#

I do not have a copy of my own work, today. I would like to have it, but I never did publish it.

ebon lily May 1, 2021, 2:02 AM

#

it was over 30 days ago

small meteor May 1, 2021, 2:03 AM

#

('I wrote' here means 'I ported')

#

That's why I do things differently today than then. I tend to do the drudge work earlier, now, if I want to keep what I've earned.

ebon lily May 1, 2021, 2:04 AM

#

oh, i do keep a copy of my work

#

it isn't worthy of being made public, yet

#

still need to write the keypad interface and display interface

small meteor May 1, 2021, 2:05 AM

#

I think we're pretty far off-topic now. ;)

ebon lily May 1, 2021, 2:05 AM

#

a little, yes

#

but it's related to the rp2040

#

btw, do you know how to do a soft-reset, like the ctrl+d on the repl, but without connecting to the repl serial?

small meteor May 1, 2021, 2:08 AM

#

On RP2040 I build in a 'reflash' command using C/C++

#

I have not found a cold reset I can do.

#

reflash usually is suitable though I don't like that it exposed RPI_RP2 if I don't intend to update it.

ebon lily May 1, 2021, 2:09 AM

#

by "cold reset" you mean, like if you pulled the power?

small meteor May 1, 2021, 2:09 AM

#

well ~~nvic.reset~~
NVIC_SystemReset();
~~something like that~~ on other platforms.

#

https://github.com/wa1tnr/ainsuForth-gen-exp-m4/blob/master/src/kernel/warm.cpp#L12

ebon lily May 1, 2021, 2:11 AM

#

but on circuitpython?

small meteor May 1, 2021, 2:13 AM

#

Haven't seen it.

#

Not really sure what's standard, there. Possibly the keyboard at the CDC/ACM interface.

ebon lily May 1, 2021, 2:14 AM

#

well, i found the equivalent to pulling the power, but that's a bit too much for just restarting it

small meteor May 1, 2021, 2:15 AM

#

The Pico RP2040 chip and supporting SDK seems to take great pains over just resetting the one thing you wanted to reset, inside the chip.

#

Kind of a strange way to do things on a $4 education sector ~~chip~~ target board. ;)

ebon lily May 1, 2021, 2:16 AM

#

i guess i will have to live with an hard reboot

#

nothing too bad

small meteor May 1, 2021, 2:18 AM

#

Resets usually kill the USB connection at the REPL if you do them poorly.

#

NVIC_SystemReset(); is well-behaved in that regard.

ebon lily May 1, 2021, 2:18 AM

#

eh, i dont care about that

#

i will be using the version 6.2.0 beta 3 with the 2 usb_cdc channels

#

i will have my c# program handle the 2nd usb_cdc channel, so, it's fine

#

just have to write it better

#

im a bit stumped on 2-way communication

small meteor May 1, 2021, 2:21 AM

#

You might want to look at tinyusb because the author made extensive use of NVIC_SystemReset(); in CircuitPython.

ebon lily May 1, 2021, 2:21 AM

#

i will have to look at it

#

got any ideas for 2-way communication over serial?

#

right now, i have it communicating by sending a "command" and receiving a "response" from c#

small meteor May 1, 2021, 2:25 AM

#

Yeah I spend a lot of time thinking about serial. ;)

#

I think xmodem is sometimes leveraged if bit for bit is important (binary transfers).

#

Simple projects use ASCII representations of everything.

#

pyserial is used on a host PC to simplify implementation there.

#

I don't know if too many people use weird binary encoding via serial.

#

I mean if you wanted to send the message of the arithmetical quantity three you could do it by sending these bits:

0000 0000 0000 0000 0000 0000 0000 0011

ebon lily May 1, 2021, 2:29 AM

#

im currently using json to send stuff

small meteor May 1, 2021, 2:30 AM

#

gforth
hex  ok
33 emit 3 ok
decimal  ok
51 emit 3 ok

#

If you understand the json thing that's probably fine. I never did learn it (at all).

#

I personally would send 0x33 to the USART as part of a text stream.

#

(to send the message 'three' to another machine)

#

If I really needed binary transfer, I'd start with coding 'xmodem'.

#

That's what I've seen others do (several times) so I'm guessing it has merit.

ebon lily May 1, 2021, 2:33 AM

#

nah, i just want it to be able to communicate with c# (or even javascript, in the future)

#

simple stuff

small meteor May 1, 2021, 2:33 AM

#

The way I look at it, it all begins with two VT-100 terminals typing to each other on a closed loop.

ebon lily May 1, 2021, 2:33 AM

#

like, sending numbers and simple utf-8 strings

small meteor May 1, 2021, 2:34 AM

#

Both humans should be able to read what the other typed. It's all a substitute for typing by hand, by people, to other people. Everything else is derived from that base idea.

#

(teletypes)

#

When you start coding for this stuff you find out you need to convert strings to ~~ASCII or to~~ integer numbers.

#

The string data is often legible.

ebon lily May 1, 2021, 2:36 AM

#

json handles it all for me

#

maybe i can send a null byte after the json string

#

im not sure how circuitpython would handle it

valid kite May 6, 2021, 10:08 PM

#

Just received a Feather RP2040. Unfortunately I failed to notice it had a USB-C and I don't have any cables. I have been programming a R-Pi Pico using the SWD interface with a Raspberry Pi 4. I'm trying to program the Feather RP2040 by powering it up from a Li-Ion battery and connecting to SWD via some wires that I soldered to the pads underneath. It doesn't look like the code is loading properly. No errors, but when I single step through the code simple variables that have been initialised to 0 are showing up as huge negative numbers. And also the code is not working. Am I scuppered until I get a USB-C cable?

#

Should say I'm using the C/C++ SDK in VScode

plucky goblet May 6, 2021, 10:32 PM

#

valid kite Just received a Feather RP2040. Unfortunately I failed to notice it had a USB-C ...

You might check the pinout, as there might be pins corresponding to the USB Vin, dunno. That is the case on some other boards.

#

But of course you don't want to bypass the voltage regulator on a board unless your supply is safe and the correct voltage.

valid kite May 6, 2021, 11:26 PM

#

I figured the battery would provide the power to the regulator instead of the USB.

plucky goblet May 7, 2021, 12:42 AM

#

valid kite I figured the battery would provide the power to the regulator instead of the US...

What I mean is that the USB connections might actually be mirrored as pins. There's generally a schematic posted somewhere where you could check this out.

small meteor May 7, 2021, 7:36 AM

#

https://learn.adafruit.com/adafruit-feather-rp2040-pico
and
https://learn.adafruit.com/assets/100337

small meteor May 7, 2021, 12:33 PM

#

QT Py RP2040 in stock.

pine needle May 8, 2021, 1:13 AM

#

#include <stdio.h>
#include "pico/stdlib.h"

int main()
{
    stdio_init_all();

    gpio_init(13);
    gpio_set_dir(13, GPIO_OUT);

    gpio_put(13, true);

    while (true) {
        puts("Hello!");
        sleep_ms(1000);
    }
    return 0;
}

How come that isn't lighting up the red led on an Adafruit Itsy Bitsy rp2040? It says on the overview page it has a Pin #13 red LED for general purpose blinking However, if I iterate through the numbers 1-30 and turn them all on, the led lights up. Am I being stupid?

pine needle May 8, 2021, 1:52 AM

#

So apparently it's on 11

plucky goblet May 8, 2021, 1:54 AM

#

I ran into the same problem and had to dig into the source code to figure out that the red LED on an Itsy Bitsy RP2040 is on pin 11, not 13. I don't know why Adafruit's web page says pin 13. I just tested this out to confirm that yes, the red LED is on pin 11 (e.g., "led = Pin(11, Pin.OUT)")

pine needle May 8, 2021, 1:55 AM

#

Do they have like a complaint form so we can let them know?

plucky goblet May 8, 2021, 1:57 AM

#

pine needle Do they have like a complaint form so we can let them know?

If they're reading their forums hopefully someone will notice.

#

But you can always send an email to tech support. They're friendly in my experience.

neon dock May 8, 2021, 2:06 AM

#

You can also report issues from the learn guide, by clicking the "Feedback? Corrections?" in the left column of the learn guides

#

That goes to someone's inbox and gets tracked, which ensures that it gets looked at

pine needle May 8, 2021, 2:06 AM

#

Oh

#

well I already sent the email so HEHE

neon dock May 8, 2021, 2:08 AM

#

Still good to know if/when there's a next time! 🙂

pine needle May 8, 2021, 2:09 AM

#

Indeed!

frank quail May 8, 2021, 2:10 AM

#

there was a similar mistake in the Circuitpython board definition, probably a matter of the board being revised before release and the pages not updated

#

or maybe a matter of confusion between D13 and GP11

pine needle May 8, 2021, 3:24 AM

#

I'm curious if anyone knows, what pin is the RGB led on for the Itsy Bitsy RP2040? Or am I just going to have to go digging again

waxen aurora May 8, 2021, 3:27 AM

#

Looks like GPIO17 from the schematic.

pine needle May 8, 2021, 3:28 AM

#

Neat thanks

pine needle May 8, 2021, 3:49 AM

#

Final question: Does Adafruit have a library for controlling the RGB LED from C/C++ OR Does the arduino library work for the rp2040 if I set it up right?

plucky goblet May 8, 2021, 3:54 AM

#

pine needle Final question: Does Adafruit have a library for controlling the RGB LED from C/...

They must, since I was doing that on my Itsy Bitsy M4 Express, which was programmed in C/C++. I think in the Adafruit docs on the Itsy Bitsy M4 Express you'd find an example file.

pine needle May 8, 2021, 4:00 AM

#

Thanks for the tip!

small meteor May 8, 2021, 7:54 PM

#

Feather 13 Itsy 11 Pico 25 qtpy 26
https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/tree/dvlp-aa/17-camelforth-b.d/pico-examples/camelforth-b/include

#

(qtpy arbitrary; no inbuilt LED; put on A3 for hahas)

#

Crickit (SeeSaw) for CPX has NeoPixel code.

#

https://github.com/adafruit/seesaw/blob/master/bsp/bsp_neopix.cpp#L25

bleak robin May 8, 2021, 10:50 PM

#

Latest version of vscode has stopped loading the circuitpython extension so can't connect to my Pico. Does anyone have a solution?

bleak kraken May 10, 2021, 12:16 AM

#

do you have platformio installed in vscode? I had to remove it inorder for circuitpython to load

tawny grove May 10, 2021, 2:20 AM

#

I need some help in mapping wiring between the AS3935 lightning detector and the RPI Pico if anyone can help

eternal grove May 10, 2021, 2:24 AM

#

You should be able to connect to it via SPI or I2C, depending on how it's configured.

small meteor May 11, 2021, 2:28 PM

#

Can't power cycle QTPYRP2040 without losing /dev/ttyACM0 hello_world USB Debian AMD64 OS. ;)

#

So have to upload .UF2 every single time.

#

cloned fresh pico-sdk and

git submodule update --init

to update tinyUSB.

#

Other targets are fine.

#

(Feather RP2040, ItsyBitsy RP2040, Raspberry Pi Pico RP2040).

#

CircuitPython seems fine on same QTPY RP2040 target; recovers power cycle no issues.

#

New USB-C cable used (from Adafruit).

#

Nothing done with udev rules in Linux.

#

/dev/tty* does not enumerate /dev/ttyACM0 or anything close.

#

Did not check dmesg (at all ;)

#

Okay dmesg looking very interesting!

small meteor May 11, 2021, 2:50 PM

#

zero effects on dmesg after removing the USB-C cable from the USB port of the PC, then plugging back in.

SESSION LOG, dmesg:

https://termbin.com/4tc5

wary rampart May 11, 2021, 3:09 PM

#

I have this program made in micropython with PIO instructions to try to play 1-bit audio through a buzzer, but the only thing I get is an OSError: 12:

import time
import rp2
from machine import Pin

# Define the one_bit program.
@rp2.asm_pio(set_init=rp2.PIO.OUT_LOW)
def one_bit():
    a = '1111111010110100101101010101000000000000000000000001111111111111000000000000101110111000000011111000000111111111110000001111111110000000000000101111111111000101111111111100111111111111011111110000000111111111111111111111111000000111111111111110101111111111111111111111111111111111111111000000000000011111111110000011111111011001111110000000011000001110000001111111111111111111111111011111111111111111111111111111111111111111111111111111111111000000000001111111111111111111111111111111111100'
    wrap_target()
    for i in range(len(a)):
        set(pins,int(a[i]))[1]
    wrap()
    
# Instantiate a state machine with the one_bit program, at 44100Hz, with set bound to Pin(15)(Buzzer on the rp2 GPIO)
sm=rp2.StateMachine(0,one_bit,freq=44100,set_base=Pin(15))

# Run the state machine for 5 seconds.
sm.active(1)
time.sleep(5)
sm.active(0)

distant spade May 11, 2021, 4:15 PM

#

@wary rampart you won't be able to do a for loop in a function marked with asm_pio

#

it's not really full python inside the function

wary rampart May 11, 2021, 7:54 PM

#

How can you do bit-banging then?
In the documentation I do not see any clear and simple example of how to do them

small meteor May 11, 2021, 9:09 PM

#

 $ git diff adafruit_qtpy_rp2040.h | cat
diff --git a/src/boards/include/boards/adafruit_qtpy_rp2040.h b/src/boards/include/boards/adafruit_qtpy_rp2040.h
index e3384fb..9b6496b 100644
--- a/src/boards/include/boards/adafruit_qtpy_rp2040.h
+++ b/src/boards/include/boards/adafruit_qtpy_rp2040.h
@@ -75,7 +75,7 @@
 #define PICO_BOOT_STAGE2_CHOOSE_W25Q080 1
 
 #ifndef PICO_FLASH_SPI_CLKDIV
-#define PICO_FLASH_SPI_CLKDIV 2
+#define PICO_FLASH_SPI_CLKDIV 4
 #endif
 
 #ifndef PICO_FLASH_SIZE_BYTES
 $ pwd
/some/path/to/camelforth-rp2040-b-MS-U/17-camelforth-b.d/pico-sdk/src/boards/include/boards
 $ date
Tue May 11 21:04:27 UTC 2021
 $

#

Doubling the clock divisor fixed my issue for now.

#

#define PICO_FLASH_SPI_CLKDIV 4

#

(Target survives removal of power; upon plugging in again, works as expected)

PR submitted here:
https://github.com/raspberrypi/pico-sdk/pull/401

vagrant jetty May 12, 2021, 12:01 AM

#

I am trying to find a library adafruit-blinka for a pi pico is there such a thing?

plucky goblet May 12, 2021, 12:58 AM

#

According to the adafruit-blinka repository on PyPI (the official distribution) it is only available for non-Circuit Python versions of Python, so that'd mean CPython (on Linux) or MicroPython. The latter can run on an RP2040, the chip of the Pi Pico. Because the library is "owned" by Adafruit it's not part of the micropython-lib port but you can AFAIK just install the library onto your Pico from PyPI.

small meteor May 12, 2021, 2:42 PM

#

In my PR I ask for a change in the clock divisor. Yet, ItsyBitsy RP2040 has the same QSPI flashROM chip, and it's recognized (by my Linux host PC, CDC/ACM) with a clock divisor of 2.

My PR asks for a divisor of 4 for qtpy RP2040.

#

(Going by CircuitPython source for the identity of that flash chip)

#

No, I'm not - sorry - going by what's in the pico-sdk include files for both target variants. Oops.

#

 $  ag W25Q64JVxQ ; echo ; pwd
boards/adafruit_qt2040_trinkey/mpconfigboard.mk
9:EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ"

boards/pimoroni_tiny2040/mpconfigboard.mk
9:EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ"

boards/adafruit_itsybitsy_rp2040/mpconfigboard.mk
9:EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ"

boards/adafruit_qtpy_rp2040/mpconfigboard.mk
9:EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ"

/some/path/to/circuitpython/ports/raspberrypi
 $

left vortex May 12, 2021, 3:42 PM

#

hi

#

I have a raspbery pi pico and ov7670 arduino camera
i would like to interface the camera with the microcontroller
but i could not find a solid tutorial which explain things for a newbie

#

my goal is to interface a cam with a microcontroller for object detection
it should be low cost solution
i have also stm32 black pill

#

would you suggest other microcontroller or camera for object detection?

small meteor May 12, 2021, 10:42 PM

#

@left vortex May want to also look at Tensor Flow Light (not sure on the spelling of it).

#

That's in the Machine Learning range.

#

They had it, like, see a cat and say CAT but only if it was a cat.

#

My guess is: they train it a lot before it's any good at that task.

#

So it 'learns' with experience.

#

https://www.tensorflow.org/lite

#

I may have some, or all, of that wrong. ;)

left vortex May 13, 2021, 3:10 AM

#

Thank you @small meteor
I have some knowledge about tensorflow
I should use tensorflow lite for microcontrollers i suppose
What I would like to learn is how i can interface the camera with rpico so i can use the video for object matching

small meteor May 13, 2021, 12:10 PM

#

@left vortex I've never done that (used a camera with a microcontroller) and I'm more of a 'you cannot do that' kind of person (been proven wrong many times).

They're doing video out with that chip, but, that's very different and not quite the same thing as normal video.

#

(still very impressive development in the MCU sector, from where I sit)

#

Pico is new on the market and innovators seem very attracted to it - it seems to me like a fast-paced new technology, building on what's already known.

#

The pio interface seems the strong attractor, here. It's something pretty unique, I think (don't know for sure).

subtle bane May 13, 2021, 12:13 PM

#

The Pico is an amazing little thing, but I'm not sure it has the horsepower to do video object matching... Pi certainly does

small meteor May 13, 2021, 12:14 PM

#

also the XIP ('excute in place?') aspect is what drew my immediate attention to it.

#

iirc that's fundamentally different - a design that emphasises off-chip storage from day one.

#

I think the basics of visual matching would be about high-contrast changes in recognized shapes in an image.

subtle bane May 13, 2021, 12:17 PM

#

Remote control cars!

small meteor May 13, 2021, 12:25 PM

#

(above strongly edited for brevity - here's the original transcript):
https://termbin.com/41xo

storm heath May 13, 2021, 1:17 PM

#

@left vortex There is a fairly new CircuitPython library for the OV7670 with an example for the pico in the examples folder https://github.com/adafruit/Adafruit_CircuitPython_OV7670 it is set up for an st7789 display. I am not aware of a guide for it, but you can ask questions here or in #help-with-circuitpython . The pin conections are in the example. The camera data lines are connected with D0-D7 on GP12-GP19. Only D0 is specifeid in the code since they must follow in that order.

#

I does work for displaying images. I have not tried using the images for anything.... yet

#

There is also an ov7670_simpletest.py that does not need a display, it just makes an "ascii-art" image in the REPL. It is a good place to start. Note: the pin assignments in the simpltest are not correct for the pico. They are for the grandcentral_m4 and must all be reassigned. Let me know if you want a working example.

left vortex May 13, 2021, 1:53 PM

#

@storm heath thank you very much

#

I will try that

storm heath May 13, 2021, 1:55 PM

#

@left vortex here is the "simpletest" with the pins set for my pico. I just verified that it works.

📎 ov7670_pico.py

#

@left vortex almost forgot, you do have to add pullup resistors to the ov7670 -- getting the guide

#

https://learn.adafruit.com/adafruit-ov7670-camera-library-samd51/hardware this guide shows how to modify the OV7670 camera

#

Or since you are just wiring it via jumpers for the pico, you can just put the pullups on a breadboard. the guide was really for plugging the camera into the grandcentral directly. I should not have made it sound so complicated. The main thing is the OV7670 camera does not have pull-ups on the SDA/SCL lines and you have to add them somehow...

left vortex May 13, 2021, 2:08 PM

#

Thank you @storm heath
I was biased micropython over circuitpython
But now i see circuitpython have better support

storm heath May 13, 2021, 2:09 PM

#

We like to think so 😉 -- Good luck!

charred sluice May 13, 2021, 2:36 PM

#

I have a Cortex M4 C-code project building with "make" and now I want to modify it to build for Raspberry Pi RP2040 Pico. The RP2040 code I'm integrating into my code uses a CMakeLists.txt and builds with VSCode.

I'd really like to have one single way of building and just specify the board type, so if it's reasonable to do, I'd like to just use make BOARD=XXXX.

#

Is it futile to try and convert from VScode and cmake back over to my current Makefile?

eternal grove May 13, 2021, 2:57 PM

#

That's what I would do.

distant spade May 13, 2021, 3:13 PM

#

charred sluice I have a Cortex M4 C-code project building with "make" and now I want to modify ...

In CP, we just list the sources and include paths from the pico-sdk that we need

hallow edge May 13, 2021, 10:56 PM

#

hi everyone. i'm playing with the PIO on circuitpython and I'm stuck on something. I have a small PIO program which does "push" and I get the data using the readinto() method of statemachine. my understanding is that since the push pushes a 32bit word I should do readinto() into a bytearray(4). However, it seems that it only returns after four PIO push instructions. In other words, I wonder if there's some internal confusion between bytes and (32 bit) words on the rp2pio library

pine needle May 14, 2021, 12:10 AM

#

std::vector<float> quat {-1, 0.7, 1, -0.5};
tud_hid_report(1, quat.data(), (sizeof(float) * quat.size()));

I'm trying to send an array of floats to the host device through tinyUSB but when I put the data I receive into https://www.scadacore.com/tools/programming-calculators/online-hex-converter/ I get wacky stuff. When I'm reading the data I get the hexadecimal string 0100 0080 bf33 3333 3f00 0080 3f00 0000 bf which I get from the python script

import hid
USB = 0xcafe
for dict in hid.enumerate(USB):
        print(dict)
        dev = hid.Device(dict['vendor_id'], dict['product_id'])
        if dev:
                f = open('./stuff', 'wb')
                f.write(dev.read(63))
                f.close()
``` Am I just putting the data in wrong and that's correct or am I doing something completely wrong?

SCADACore

Online Hex Converter - Bytes, Ints, Floats, Significance, Endians -...

Convert Hex values into Bytes, Ints, and Floats of different bit significance, Bit Endians, and byte significance for interfacing with unknown field devices

plucky goblet May 14, 2021, 4:30 AM

#

I don't see an exact match for a channel for this question, but I was wondering if anyone knew if the new Itsy Bitsy RP2040 is a direct pin-for-pin replacement for the Itsy Bitsy M4 Express. I don't mean what's inside the CPU, but I've got the latter on a robot in a bespoke-wired socket and from the docs I can't see any pin-wise difference, so I'd like to just swap out the new RP2040 board to replace the ATSAMD51 one currently on the robot.

I.e., when Adafruit say it's an Itsy Bitsy form factor do they mean that they're pin-wise equivalent as well?

distant spade May 14, 2021, 5:23 PM

#

hallow edge hi everyone. i'm playing with the PIO on circuitpython and I'm stuck on somethin...

bytearrays are always 8 bit writes. check out array instead because it allows you to specify larger units

distant spade May 14, 2021, 5:23 PM

#

plucky goblet I don't see an exact match for a channel for this question, but I was wondering ...

Ya, probably. The pinout of the RP2040 is quite flexible

ancient forge May 14, 2021, 5:27 PM

#

Would this be right for a reset button on a pico (with also an input pin, I know RESET and RUN could technically be the same pin but it's making things easier to understand in this schematic)

small meteor May 14, 2021, 10:41 PM

#

@ancient forge Feather has 10k there and the rest of your circuit matches it.

#

Pin 26 is NOT_RUN (/RUN).

#

The signal on that pin is labeled NOT_RESET (/RESET).

#

(If they were inverted, the resistor would be a pull-down to GND)

#

NOT here means happens when brought low

#

/RESET means 'this thing resets when this pin is brought low'

ancient forge May 14, 2021, 10:47 PM

#

Yeah, I understand what it means, I'm just glad I got it sorted, I think I ended up increasing it to a 10k one anyhow

small meteor May 14, 2021, 10:50 PM

#

Active Low is a great term, here, as well.

plucky goblet May 14, 2021, 11:23 PM

#

ancient forge Yeah, I understand what it means, I'm just glad I got it sorted, I think I ended...

Yeah, I don't know why anyone would use 1K for a pullup resistor, draws a lot of current unnecessarily. 10K is pretty common.

charred sluice May 18, 2021, 2:54 PM

#

distant spade In CP, we just list the sources and include paths from the pico-sdk that we need

Fought with make for a couple of days and called a truce for now. Got too frustrated and wanted to get something compiling. Went back to cmake and VSCode and getting close to compiling again. Want to see something working and can then work on optimizing the toolchain when I have more patience…

full saddle May 18, 2021, 6:06 PM

#

First time I try to program in MicroPython (used to C/C++ and Arduino boards).

#

Any idea? Trying to read a BME280 sensor. Not sure which I2C pins to connect to. But I used these:

#

Nvm, used a different BME280 library. Works fine now.

red wyvern May 18, 2021, 10:10 PM

#

I'm just starting to look at building a GPIB (aka IEEE-488, HP-IB, etc) interface board, either to USB, Ethernet, or something else that could talk with a Linux box or RPi more easily than IEEE-488.

I'm curious - has anyone tried using the RP2040's PIO with that kind of bus? There are existing projects built around Arduino shield and Pi Hat form factors but an RP2040 could enable a much smaller form factro.

full saddle May 19, 2021, 3:30 PM

#

Anyone using Arduino IDE for their RP2040?

When my serial monitor is open, I can't upload properly. Always have to close it and then upload, reopen. Anyone knows why?

sleek sandal May 19, 2021, 4:22 PM

#

full saddle Anyone using Arduino IDE for their RP2040? When my serial monitor is open, I c...

Woof. Ya, the Arduino IDE can be rough. I've experienced it before, that with different kinds of programmers selected, it often doesn't manage connection state to serial ports very well. If you're able, I've switched exclusively to PlatformIO and the VSCode plugin for it.

full saddle May 19, 2021, 4:23 PM

#

sleek sandal Woof. Ya, the Arduino IDE can be rough. I've experienced it before, that with di...

Thanks, found platformio quite overwhelming. Maybe I should give it a go again

sleek sandal May 19, 2021, 4:25 PM

#

full saddle Thanks, found platformio quite overwhelming. Maybe I should give it a go again

Ya, Arduino is this interesting middle ground, where if you don't need the more advanced functionality of Arduino/C, it is easier than most editors but as a software developer by trade, the editor is a bit painful for me to use.
VS Code + Microsoft just released their own Arduino plugin, might be worth a try https://marketplace.visualstudio.com/items?itemName=vsciot-vscode.vscode-arduino

Arduino - Visual Studio Marketplace

Extension for Visual Studio Code - Arduino for Visual Studio Code

sleek sandal May 19, 2021, 4:26 PM

#

full saddle Thanks, found platformio quite overwhelming. Maybe I should give it a go again

I've played with it a bit, its interesting how it works. They end up calling the normal Arduino executable for most functions, VSCode is just a better code editor.

#

The benefit of that extension over the PlatformIO one, is it's more mainstream and will likely feel more familiar with terms and buttons and such.

full saddle May 19, 2021, 4:46 PM

#

sleek sandal Ya, Arduino is this interesting middle ground, where if you don't need the more ...

Yes, software dev myself. The new Arduino IDE 2.0 is better though.. still beta. Will try the MSFT Arduino plug-in

#

Thanks for the tip!

small meteor May 19, 2021, 9:31 PM

#

I don't remember a problem with RP2040 and serial monitor Arduino IDE.

#

https://github.com/earlephilhower/arduino-pico.git

#

I'm reflashing so that automatically logs out the device ;)

#

https://github.com/wa1tnr/rp2040-arduino-basics-a/blob/main/monitor.d/monitor-hh-p/reflash.cpp#L5

#

But I usually 'double clutch' the two-button Adafruit boards (press BOOTSEL and tap RESET) if I don't have reflash going.

#

never really learned what 'double-clutch' means

small meteor May 19, 2021, 10:04 PM

#

pico back in stock on Adafruit vending site. ;)

chrome osprey May 19, 2021, 10:37 PM

#

ebon lily i first need to buy it to test, but i am willing to throw something together

I've finally gotten hold of a RGB Base and I've written a TCA9555 library which will read the keys. The leds are controllable with the normal DotStar library. It's only on Github at the moment (not PyPI or Readthedocs.)
https://github.com/lesamouraipourpre/Community_CircuitPython_TCA9555
There's an example which reads the keys and controls the LEDs.
Any feedback would be appreciated.

GitHub

lesamouraipourpre/Community_CircuitPython_TCA9555

Library for TCA9555 Low-Voltage 16-Bit I2C and SMBus I/O Expander on CircuitPython. - lesamouraipourpre/Community_CircuitPython_TCA9555

ebon lily May 19, 2021, 10:39 PM

#

😮

#

i need to test it, once i get a board

#

yes, still havent bought the keyboard thingy

#

keypad

#

but i will try it as soon as i get it

#

i was reading it and it does look really cool

exotic moth May 19, 2021, 10:51 PM

#

chrome osprey I've finally gotten hold of a RGB Base and I've written a TCA9555 library which ...

This looks really excellent!

ebon lily May 19, 2021, 10:51 PM

#

it does!

#

it seems like it is really easy to use

exotic moth May 19, 2021, 10:52 PM

#

Excellent use of register.

ebon lily May 19, 2021, 10:52 PM

#

but is it me-proof? 🤔

#

but yeah, really nice work

#

thank you

raw monolith May 20, 2021, 12:54 AM

#

Hello everyone! I need a little help with a project I'm making with an RP2040

#

I want to know what would be the best way to power the RP2040 without using a PC or battery

ebon lily May 20, 2021, 12:55 AM

#

using a pc? just plug an usb cable

raw monolith May 20, 2021, 12:55 AM

#

(If it's possible)

#

without using a PC, neither battery

ebon lily May 20, 2021, 12:55 AM

#

oh

#

well, check the pinout

#

there's pins there that you can pass 5v and ground to it

raw monolith May 20, 2021, 12:56 AM

#

#

Which of these would it be?

ebon lily May 20, 2021, 12:59 AM

#

if im not mistaken, either 39 or 40 will be for 5v in

#

let me check

#

yeah, seems that pin 39 takes 1.8-5.5v

raw monolith May 20, 2021, 1:02 AM

#

alright, thank you!

ebon lily May 20, 2021, 1:02 AM

#

you're welcome

coral wyvern May 20, 2021, 2:23 PM

#

Hello everyone, I got a question. I want to control multiple small oled displays, and for what I want to make it seems all the displays are controlled via SPI. Now based on what I've read, could I use one spi out to send data to all of them, and then use a general gpio as the cs on each one so when I want to send data to only one of them I just pull that one's cs high and leave the other ones low (or vice versa as appropriate, I have no idea what I'm doing. I'm new to all of this, and have been learning python for a month and circuitpython for 2 weeks). If that's not how that works could someone point me in a correct directiom of a rabbit hole to go down. Thank you

small meteor May 20, 2021, 2:27 PM

#

@coral wyvern it may be necessary to experiment with at least two display units. As far as I know, you've described it correctly. /CS (or just CS) is probably used to tell the bus which unit is being talked-to.

#

I think it has to be dynamically operated - I don't think you can get away without /CS connected to GPIO.

#

(say by tying it to GND or to Vcc).

coral wyvern May 20, 2021, 2:48 PM

#

i figured it had to be gpio, i just wasnt sure if there wasnt something special like it NEEDED to be a particular pin or any gpio that can be set to output and be high or low will work. I just wanted to make sure I'm not missing something cause it seems like everyone else who's done something similar has a much more complicated solution. Maybe as I try this i'll find out why. Needless to say having some confirmation that I'm understanding it correctly just means I need to start trying stuff out and see how it works.

#

which in turn means maybe I can make my idea to make my own version of the NKK lcd switches happen and make a macropad like streamdeck where each switch has it's own 96x64 rgb oled

waxen aurora May 20, 2021, 3:01 PM

#

coral wyvern i figured it had to be gpio, i just wasnt sure if there wasnt something special ...

Yep, your understanding is on the level. Some chips have dedicated pins for CS which is under the control of the SPI peripheral, but it's almost always fine (or even preferred) to use a general GPIO for that instead and have the software layer handle which device is being selected.

coral wyvern May 20, 2021, 5:08 PM

#

Thank you @waxen aurora . Admittedly, now that I know that it should be possible, I have a million other ideas and questions running through my head of the possibilities.

small meteor May 21, 2021, 12:44 PM

#

@rapid stag I have one of each (differently date-coded) flash chip.

My copy of the QT Py RP2040 has the problem flash chip; the ItsyBitsyRP2040 I have uses the non-problematic flash chip

Wrt
https://github.com/raspberrypi/pico-sdk/pull/401

rapid stag May 21, 2021, 12:46 PM

#

small meteor <@!329766224093249548> I have one of each (differently date-coded) flash chip. ...

thanks, that is very interesting; there might be other components whose specs have changed between runs, such as the crystal or even the RP2040 (though it is the same version). The more data points we have the better!

small meteor May 21, 2021, 12:46 PM

#

;) I like having both the problem and non problem chips on hand. ;) It's fun.

rapid stag May 21, 2021, 12:46 PM

#

I have the same: two qt py's and one Itsy with same data code, all are fine; one qt py with other data code, problematic

small meteor May 21, 2021, 12:47 PM

#

I didn't want to clutter up the PR with this so I figured I'd let you know here, in case you need a tester for some reason.

rapid stag May 21, 2021, 12:54 PM

#

@small meteor do you actually see a problem with the possibly problematic QT Py? Does it load and run CircuitPython just fine?

small meteor May 21, 2021, 12:56 PM

#

@rapid stag Yes it runs CircuitPython without issue, but won't run the hello_world in pico-examples in pico-sdk repo.

#

(Does not enumerate USB except when dragging and dropping the .UF2 for the pico-sdk hello-world example program).

#

(so it runs exactly once - will not run a second time when power is cycled)

rapid stag May 21, 2021, 12:58 PM

#

that is similar behavior; you could try building the hello-world with that one line change to xosc_init() and see if it makes any difference

#

does hello-world work fine on the itsy?

small meteor May 21, 2021, 12:59 PM

#

iirc I had no problems with the Itsy at all.

#

I'm running a CamelForth on the targets which challenges them more than hello-world does. ;)

#

I set the clock divisor to 4 (from 2) for qtpy and that cleared up my issue.

#

(itsy didn't need this change, nor did feather or Pi Pico RP2040)

rapid stag May 21, 2021, 1:00 PM

#

clock divisor of 2 is over the spec'd speed for the flash chip

#

maybe just over

small meteor May 21, 2021, 1:01 PM

#

I don't know where to make the xosc_init() change but I'll look for it.

rapid stag May 21, 2021, 1:02 PM

#

See https://forums.adafruit.com/viewtopic.php?f=60&t=178640&p=873715#p873709

small meteor May 21, 2021, 1:02 PM

#

 $  ag xosc_init | cat -n
     1  src/rp2_common/hardware_clocks/clocks.c:134:    xosc_init();
     2  src/rp2_common/hardware_xosc/include/hardware/xosc.h:28:void xosc_init(void);
     3  src/rp2_common/hardware_xosc/xosc.c:16:void xosc_init(void) {

#

@rapid stag
Adafruit CircuitPython 6.2.0-58-g17955ba5e-dirty on 2021-05-18; Adafruit QTPy RP2040 with rp2040

This enumerates /dev/ttyACM0 on Debian amd64 even after CP2104 Friend has enumerated and has been connected-to in an active session.

That's fairly robust behavior.

#

The ItsyBitsy RP2040 fails this test - won't enumerate unless I unplug CP2104 friend, first. ;)

#

It's running an Arduino IDE program for RP2040 (several days since buring the firmware)

rapid stag May 21, 2021, 1:15 PM

#

there is an erratum about that in the RP2040 datasheet, I think

#

about multiple devices on USB

small meteor May 21, 2021, 1:15 PM

#

Right but why does your circuitpython not also fail.

rapid stag May 21, 2021, 1:16 PM

#

I'm not sure there's a software workaround, but we might have enabled it if there is. It may also be due to some delay, or differences in what the particular version of tinyusb is doing

small meteor May 21, 2021, 1:16 PM

#

Okay - yeah there was a software kludge and I've tested it. My (human) memory is poor on this. ;)

rapid stag May 21, 2021, 1:17 PM

#

there is a separate thing about GPIO15, but I think that's a different erratum

small meteor May 21, 2021, 1:17 PM

#

The best I got was I could enumerate two /dev/ttyACM* devices but if I connected to either one the other would not enumerate.

rapid stag May 21, 2021, 1:17 PM

#

there have been many recent changes re RP2040 in tinyusb: https://github.com/hathach/tinyusb/pulls?q=is%3Apr+is%3Aclosed+rp2040

small meteor May 21, 2021, 1:17 PM

#

So to get both enumerated and active in a terminal I had to plug both in, see that they enumerated, then connect one at a time. That did work.

#

My workaround was the GPIO15 thing iirc.

#

Anyway - main point was your CircuitPython in that .zip in the forum seems quite robust comparatively.

rapid stag May 21, 2021, 1:28 PM

#

ah, you were testing with that, got it. Keep an eye on these issues, lots of questions to answer here

small meteor May 21, 2021, 1:28 PM

#

@rapid stag Thanks for all of this.

plush moon May 23, 2021, 8:43 PM

#

Has anyone been able to build and flash code to the rp2040 feather board just using C and Cmake? (I assume yes but I am trying to move my dev setup from the pico to the feather and I am having trouble, it builds fine but flashing with picoprobe or using the uf2 file makes the board crash)

small meteor May 23, 2021, 10:29 PM

#

@plush moon Not sure what you're asking.

#

https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/tree/main/17-camelforth-b.d/pico-examples/camelforth-b/include

plush moon May 23, 2021, 11:42 PM

#

mainly asking how other people are building there code for the feather rp2040 because i am having issues

#

the differences between compiling for the base pico board and feather would be helpful too but ill thumb through that git repo and see if i can fix my problem

heady estuary May 24, 2021, 7:30 PM

#

I'm wondering if anyone else has been having significant problems flashing their rp2040 feather via the arduino ide. I was only able to flash it once since I got it, every time both prior and since then it gives a generic error and fails to upload. It persists across my windows and arch machine. Dragging the uf2 file over from the temp directory into the bootloader directory works most of the time, although anything other than a simple blink sketch doesn't seem to work.

I haven't really done much with microcontrollers before so I'm a bit lost on what the issue is

keen iron May 24, 2021, 7:30 PM

#

Good evening everyone, a quick question if I may? I'm trying to build my first project with a raspberry pi pico... an HC-SR04 ultrasonic sensor requires 5V and a 3.3V split voltage which runs from VBUS, but I also wish to use the MAX98357 I2S Class-D Mono Amp which requires 3.3V... Can I run that from the 3V3(OUT) and have them work together from the one micro USB input or would I need to add an external breadboard power supply? Oh and two diffused red LED, so sensor to light and sound.

small meteor May 24, 2021, 10:31 PM

#

@plush moon

 $ cmake .. -D"PICO_BOARD=adafruit_feather_rp2040"

#

The original Raspberry Pi Pico RP2040 is the only target that does not need something like this.

#

Everything else needs to be told what $PICO_BOARD is.

#

Look in pico-sdk/src/boards/include/boards for each associated .h file for any target board.

#

Take that filename and drop the .h from it.

#

That's how I got the correct parameter for:

cmake .. -D"PICO_BOARD=adafruit_feather_rp2040"

#

There is an include file in that directory, named

adafruit_feather_rp2040.h

#

@heady estuary After building an .UF2 file in the Arduino IDE, I copy it to the mounted RPI_RP2 drive using the operating system itself.

I don't use the Arduino IDE to automate this, in any way.

#

@keen iron I have not at all looked at what the RPi Pico RP2040 board can do in the way of supplying power to sensors and such.

#

Almost all boards on the market provide at least 100 mA at 3.3 VDC to peripherals like that sensor, as well as VUSB which is passed from the host PC and is 5.0 VDC.

#

The RPi Pico RP2040 target's power supply section is reproduced in the scrollback of this #channel if I'm not mistaken.

#

It's also in the factory PDF.

#

(I checked; it's not in the scrollback of this channel, unless I (somehow) missed it)

#

Looks like pin 36 is 3.3 out

#

38 is ground (and several others are as well)

#

VBUS is on pin 40

#

4.4 Powerchain in the PDF.

#

Basically says VBUS feeds to VSYS through a schottky diode.

#

RT6150 buck/boost transforms VSYS to a fixed 3.3VDC.

heady estuary May 24, 2021, 11:22 PM

#

small meteor <@!211324975544664064> After building an `.UF2` file in the Arduino IDE, I copy...

Alright, that's what I've been doing. I'm not sure why it fails in the ide, but if copying it manually works, it works

small meteor May 25, 2021, 4:30 PM

#

@heady estuary I just didn't want to spend the time tracing down if/why it should work through the IDE.

#

I had a similar problem with STM32duino which I also circumvented.

#

The hardware usually is on the market way before SDK support is full and complete.

#

Two years from now it'll be like 'what problem?'

heady estuary May 25, 2021, 5:24 PM

#

Now I just have to figure out how to get my oled feather to work...

Running the example oled sketch leaves me with a black screen :/

small meteor May 25, 2021, 5:32 PM

#

I've never once run an OLED. The regular LCD character displays you could adjust the contrast and figure out if anything at all was being received by the LCD controller chip.

heady estuary May 25, 2021, 5:39 PM

#

I have no problem running the oled in circuitpython, only when I'm trying to use it with arduino. At first I thought maybe I was missing a library or maybe something wasn't connected right but it just doesn't seem to want to work with arduino

small meteor May 25, 2021, 5:41 PM

#

Oh okay if it's wired correctly and works with any software at all then it is a software issue not a wiring issue.

heady estuary May 25, 2021, 5:47 PM

#

It does spit out a bunch of errors about the adafruit libraries using deprecated commands, I can't post it right now because I'm not at home though

#

maybe it's just an rp2040 problem, considering it's still pretty new

small meteor May 25, 2021, 5:50 PM

#

A lot of those libraries use well-known interfaces; they may make assumptions about pins.

#

I would find a library that does work and examine why it works.

#

Obviously it'll be one that does nothing I want done, but them's the breaks. ;)

heady estuary May 25, 2021, 5:52 PM

#

That's always how it goes

small meteor May 25, 2021, 5:52 PM

#

Look at some of the well-known libs and ask the question: how do they work on very different platforms. How were they ported.

#

I mainly work with the core so I don't encounter this issue very much.

heady estuary May 25, 2021, 5:53 PM

#

Serves me right for expecting new hardware to be fully ironed out :P

small meteor May 25, 2021, 5:54 PM

#

;)

#

The stuff they are working on for RP2040 is compelling.

#

I've learned to follow what they're up to ;)

heady estuary May 25, 2021, 5:56 PM

#

oh and on the note of flashing via the ide

I've found that flashing it with Pico selected with mbed, it just works. Of course the code doesn't run at all, but it flashes without any problems. The exe that it's using to flash mbed must be doing something veery different than what the python script is doing

#

Same if I flash it as an rp2040 Connect. It just flashes, no problem

small meteor May 25, 2021, 5:58 PM

#

I did learn exactly how the Arduino IDE launches a shell script to do the STM32F405 Express upload thing, iirc.

#

If you read the logs and work at it hard enough, it ought to work.

#

Get it working on the command line perfectly.

heady estuary May 25, 2021, 5:59 PM

#

That's hopeful

Ill take a peek at it. I'm not the best python programmer in the world but hopefully it's not too difficult to understand what it's doing

#

and why it's having a problem

small meteor May 25, 2021, 6:00 PM

#

In Linux it was pretty deep under the ~/.arduino15 tree

heady estuary May 25, 2021, 6:00 PM

#

It works fine up until it disconnects the board to reboot it into bootloader, then it seems to forget what it's flashing to

#

whereas the exe doesn't have a problem with that

#

Anyways thank you, I'll update if I dig anything up

small meteor May 25, 2021, 6:04 PM

#

.arduino15/packages/STM32/tools/STM32Tools/1.4.0/tools/linux/stm32CubeProg.sh

#

Pretty sure I messed with that to get it to go.

#

So that's fairly deep under ~/.arduino15

#

I don't have any logs to look at since I directly copy the UF2 and it's done. ;)

#

So I don't know what the Arduino IDE tries to do - or if it would succeed or not. ;) lol never even gave it a chance to fail. ;)

#

(I was already copying the UF2 using the same method, for C/C++ SDK work, so there was no real change in my workflow).

heady estuary May 25, 2021, 6:13 PM

#

I'll paste it here when I'm home, it's a bit strange

small meteor May 25, 2021, 6:13 PM

#

;)

#

Turn on any warnings and messages in the IDE.

#

I think I saw some openocd stuff for this but I don't know how that works.

heady estuary May 25, 2021, 10:19 PM

#

Right so I have part of the error that Adafruit_SH110X spits out:

H:\Documents\Arduino\libraries\Adafruit_SH110X\splash.h:6:5: warning: 'B00000000' is deprecated: use 0b00000000 instead [-Wdeprecated-declarations]
    6 |     B00000000, B00000000, B00000000, B00000000, B00000000, B00000001, B10000000,
      |     ^~~~~~~~~
In file included from C:\Users\{username}\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\1.5.1\cores\rp2040/api/ArduinoAPI.h:26,
                 from C:\Users\{username}\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\1.5.1\cores\rp2040/Arduino.h:30,
                 from H:\Documents\Arduino\libraries\Adafruit_GFX_Library/Adafruit_GFX.h:5,
                 from H:\Documents\Arduino\libraries\Adafruit_GFX_Library/Adafruit_GrayOLED.h:29,
                 from H:\Documents\Arduino\libraries\Adafruit_SH110X\Adafruit_SH110X.h:27,
                 from H:\Documents\Arduino\libraries\Adafruit_SH110X\Adafruit_SH110X.cpp:39:
C:\Users\{username}\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\1.5.1\cores\rp2040/api/Binary.h:45:3: note: declared here
   45 |   B00000000 DEPRECATED(0b00000000) = 0,
      |   ^~~~~~~~~

I assume it's going through an array because it keeps repeating this, advancing one space at a time.

#

It ends with

  516 |   B11100000 DEPRECATED(0b11100000) = 224,
      |   ^~~~~~~~~
H:\Documents\Arduino\libraries\Adafruit_SH110X\Adafruit_SH110X.cpp: In member function 'virtual void Adafruit_SH110X::display()':
H:\Documents\Arduino\libraries\Adafruit_SH110X\Adafruit_SH110X.cpp:281:49: warning: narrowing conversion of '(176 + ((int)p))' from 'int' to 'uint8_t' {aka 'unsigned char'} [-Wnarrowing]
  281 |       uint8_t cmd[] = {0x00, SH110X_SETPAGEADDR + p, 0x10 + (page_start >> 4),
H:\Documents\Arduino\libraries\Adafruit_SH110X\Adafruit_SH110X.cpp:281:59: warning: narrowing conversion of '(16 + ((int)(page_start >> 4)))' from 'int' to 'uint8_t' {aka 'unsigned char'} [-Wnarrowing]
  281 |       uint8_t cmd[] = {0x00, SH110X_SETPAGEADDR + p, 0x10 + (page_start >> 4),
      |                                                      ~~~~~^~~~~~~~~~~~~~~~~~~
H:\Documents\Arduino\libraries\Adafruit_SH110X\Adafruit_SH110X.cpp:282:35: warning: narrowing conversion of '(int)(((unsigned char)((int)page_start)) & 15)' from 'int' to 'uint8_t' {aka 'unsigned char'} [-Wnarrowing]
  282 |                        page_start & 0xF};
      |                        ~~~~~~~~~~~^~~~~

#

I'm not sure if this is more suited for here or #help-with-arduino

#

The program compiles fine, but when trying to upload, I get this:

Global variables use 12868 bytes (4%) of dynamic memory, leaving 249276 bytes for local variables. Maximum is 262144 bytes.
C:\Users\{username}\AppData\Local\Arduino15\packages\rp2040\tools\pqt-python3\1.0.1-base-3a57aed/python3 C:\Users\{username}\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\1.5.1/tools/uf2conv.py --serial COM9 --family RP2040 --deploy C:\Users\{username}\AppData\Local\Temp\arduino_build_239174/OLED_featherwing.ino.uf2 
An error occurred while uploading the sketch

#

and nothing after that

#

if anyone has insight on this, please share

eternal grove May 26, 2021, 12:54 PM

#

The messages give the recommended fix: basically you'd replace each instance of B11100000 with 0b11100000

#

Since there are lot of different ones, I would probably write a short Python program to do them for me.

heady estuary May 26, 2021, 4:11 PM

#

I just went and used notepad++ to batch replace anything that started with B with 0b

#

while those errors are now gone, it still doesn't run on the feather 🙃

eternal grove May 26, 2021, 9:49 PM

#

It compiles though?

heady estuary May 28, 2021, 3:00 PM

#

eternal grove It compiles though?

yeah it does (late reply, oops)

it just doesn't actually run at all, as far as I can tell

#

visually, anyways.

#

no serial output either

#

It must be something with one of the libraries included in the oled example because other included examples (for blinking the led or running a multithreaded program) work without issue

small meteor May 28, 2021, 6:33 PM

#

@heady estuary Is there some reason why you're not solving the problem you're solving? ;)

#

C:\Users\{username}\AppData\Local\Arduino15\packages\rp2040\tools\pqt-python3\1.0.1-base-3a57aed/python3 C:\Users\{username}\AppData\Local\Arduino15\packages\rp2040\hardware\rp2040\1.5.1/tools/uf2conv.py --serial COM9 --family RP2040 --deploy C:\Users\{username}\AppData\Local\Temp\arduino_build_239174/OLED_featherwing.ino.uf2 
An error occurred while uploading the sketch

#

So there's a tool provided by rp2040 foo vendor that uses python3.

#

uf2conv.py is something to take some other input (possibly .bin) and make it into a UF2 file.

#

Serial was specified as COM9.

#

The --deploy switch points to a UF2 file. Ostensibly it even exists.

#

So I would check manually that the UF2 got built and uploads and runs on the target.

#

If it does, it's a matter of automating that process.

#

You may even find the text of that error message in a very specific file; you can edit that file and change the text of that message, to remove all doubt that it is that very file that is reporting the error encountered.

small meteor May 28, 2021, 6:41 PM

#

heady estuary I'm wondering if anyone else has been having significant problems flashing their...

anything other than a simple blink doesn't seem to work.

#

That'll be the programmer - yourself. ;)

#

If blink's working try something else that's kind of simple.

#

Do not skip over steps.

#

This is the Arduino IDE and not the C/C++ toolchain.

#

This program is compiled in the Arduino IDE, for the RP2040 chip:

https://github.com/wa1tnr/rp2040-arduino-basics-a/tree/main/monitor.d/monitor-hh-p

#

This one's fairly basic and not overly commented or with so much cruft left behind:
https://github.com/wa1tnr/rp2040-arduino-basics-a/tree/main/_test-a.d/itc-forth-aa

#

The 'reflash' there will present as RPI_RP2 drive in Linux. I don't know if other OS's use a different name (doublt it).

#

From there just drag and drop to reflash (using a UF2).

#

(does in software what other have to do in hardware, to start a reflash)

heady estuary May 28, 2021, 7:47 PM

#

small meteor So I would check manually that the UF2 got built and uploads and runs on the tar...

uf2 does get built, and they run when copied manually

heady estuary May 28, 2021, 7:48 PM

#

small meteor That'll be the programmer - yourself. ;)

And I'm using pre-made examples. Had I written it myself, I'd know who to blame :P

#

the specific example I'm using is from the Adafruit SH110X Library, called OLED_featherwing

heady estuary May 28, 2021, 8:46 PM

#

small meteor This one's fairly basic and not overly commented or with so much cruft left behi...

This seems to have worked, it prints "A" several times to serial and then puts the board into bootloader mode. From there, I was able to drag a .uf2 file I made (which blinks the on board neopixel RGB) into the RPI_RP2 drive, which flashed and ran without issue. So that works!

#

I tried to run the example oled sketch again, though, and I was able to get serial output but nothing to display on the oled

#

at least I know the neopixel works ¯_(ツ)_/¯

small meteor May 30, 2021, 5:42 PM

#

heady estuary This seems to have worked, it prints "A" several times to serial and then puts t...

So that's great!

#

RP2040 Feather

I have one of these and found it good to work with.

#

LED on GPIO13 and NeoPixel on GPIO16 (Feather variant doesn't need a 'power pin').

#

Flash is to 0x10000000 plus 0x7FFFFF.

heady estuary May 30, 2021, 5:48 PM

#

yeah I had to look at the board schematic to figure out which pin it was since it's pretty much undocumented

small meteor May 30, 2021, 5:48 PM

#

CamelForth will run on FeatherRP2040:

https://github.com/wa1tnr/camelforth-rp2040-b-MS-U

#

I didn't add WS2812b support to CamelForth just yet.

heady estuary May 30, 2021, 5:50 PM

#

do you think I should try that out too

small meteor May 30, 2021, 5:51 PM

#

Yeah sure. It'll give you confidence that the target's working nicely.

#

Interacting with the target in real time is a powerful convincer, I think.

heady estuary May 30, 2021, 5:52 PM

#

I'm beginning to think that the SH110X library just hasn't been updated for the rp2040 feather, but I don't know because I haven't seen or heard anyone else using it with that specific feather

#

so there's a very real chance I'm just very incompetent :)

small meteor May 30, 2021, 5:53 PM

#

No your first guess sounds correct.

#

I think you were on Arduino IDE (I can't remember obvious things anymore ;)

#

https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/build/run_cmake_feather.sh

#

that's the build script I use to make a CamelForth UF2 for Feather RP2040 using C/C++ SDK toolchain.

#

There should be at least one prebuilt UF2 ready to download.

#

Which is probably more to the point for your needs.

#

Start with this one:
https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/tree/main/pre-built-uf2.d/1-Feather_COPY_TO_RAM.d

#

If you type

  5 3 * .

it should say either

  F
ok

or:

  15
ok

#

The dot just prints what's on top of the Forth stack.

#

5 and 3 are literals.

#

F or 15 is the answer and depends on the base you're in (decimal, or hex).

#

It's pretty much an RPN calculator when used this way.

#

One of these two should be in the basic Forth dictionary:
https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/camelforth-b/pico-hw/pico-LED/pico-LED.c#L26

#

https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/camelforth-b/forth/forth.c#L653

#

They both seem to be. ;)

heady estuary May 30, 2021, 6:00 PM

#

alright, thank you

Im doing a bit of spring cleaning right now so my workstation is a bit covered in junk (but when is it not) so I'll have to get back to you later on the outcome

small meteor May 30, 2021, 6:00 PM

#

So just type 'blink' at the ok prompt.

heady estuary May 30, 2021, 6:00 PM

#

I appreciate your patience will all of this, though!

small meteor May 30, 2021, 6:01 PM

#

pip should be a very terse blink and 'blink' should be a stronger longer duration blink.

#

;)

#

: tryme 8 delay pip 12 delay blink 8 delay blink 12 delay pip ;

heady estuary May 30, 2021, 6:01 PM

#

will do

small meteor May 30, 2021, 6:02 PM

#

The colon begins a definition in forth and the semicolon ends it.

#

'tryme' is the name of the new defintion (called a 'word').

#

I'm often not here for a few days so I'll see any responses only when I return. ;)

heady estuary May 30, 2021, 6:03 PM

#

that's fine, I greatly appreciate the help

small meteor May 30, 2021, 6:04 PM

#

glad to do it.

#

the more you know <unicorns>

heady estuary May 30, 2021, 6:05 PM

#

🏳️‍🌈⭐

small meteor Jun 1, 2021, 8:22 PM

#

You can get them chips for a buck.

#

https://www.raspberrypi.org/blog/raspberry-pi-rp2040-on-sale/

#

Today, we’re announcing the logical next step: RP2040 chips are now available from our Approved Reseller partners in single-unit quantities, allowing you to build your own projects and products on Raspberry Silicon.

#

It's a nice chip!

eternal grove Jun 2, 2021, 2:20 AM

#

Looks home-solderable too, which is nice

ancient forge Jun 3, 2021, 11:27 AM

#

I've heard LadyAda talk about using the Boot Select button on RP2040 boards as a GPIO but how does that work? whats the circuitry used?

storm heath Jun 3, 2021, 11:48 AM

#

@ancient forge See the last comment in this discussion https://www.reddit.com/r/raspberrypipico/comments/lymezt/say_i_want_to_use_the_boot_select_button_as_a/. It is not encouraging.... As documented in the Pico Datasheet. The BOOTSEL button is not connected to RP2040 GPIO at all, it is connected to the Chip Select (/CS) pin of the W25Q16JV flash memory chip. The /CS pin enables and disables the flash chip. The button disables flash boot, enabling USB boot.

ancient forge Jun 3, 2021, 11:59 AM

#

nono, not the pico

#

She said Pimoroni did it with one of their boards, and she was doing it with her KeyBoar

storm heath Jun 3, 2021, 12:16 PM

#

Ah sorry, I misunderstood.

small meteor Jun 4, 2021, 7:01 AM

#

I've forgotten but probably one 1N4148 signal diode and maybe a resistor.

#

When she publishes the schematic it's gonna be something simple like that. ;)

stone tusk Jun 4, 2021, 8:44 PM

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Can we built a fido2 u2f key using rp2040 ie. QtPy or rp pico

dusty hedge Jun 8, 2021, 6:04 PM

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hi guys, I have a pio question I can't make forward progress on by googling: I have two encoders attached to my rp2040 feather, and I have pio based encoder reader that works fine if I read from one or the other - but when I read from both, it seems like they start interfering with each other, and either no data comes out, or it comes out garbled/twice. is there something I have to do to make the statemachine instances properly separate? - https://pastebin.com/SXj93KgD - maybe I'm missing something obvious about oop in python, but I hope not.

dusty hedge Jun 8, 2021, 10:09 PM

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dusty hedge hi guys, I have a pio question I can't make forward progress on by googling: I h...

hi @dusty hedge , I think I see your problem: your readinto is blocking, so the code will just wait for alternating encoders to have data, and that's why they seem to be interfering. try to add a in_waiting check at the start of read_encoder and you should be good!

small meteor Jun 10, 2021, 7:11 AM

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hey guys, i have a question here, does someone have experience use C++ for adafruit feather rp2040 board? i saw there are almost none info on the internet.

also can we actually use the PICO C/C++ SDK for Adafruit feather rp2040 ? bcs when i click the C/C++ support link on the data sheet, it goes to github for PICO.

thank you 🙂

plucky goblet Jun 10, 2021, 7:59 AM

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small meteor hey guys, i have a question here, does someone have experience use C++ for adafr...

I think the fact that the chip and the boards that use it are all very new means that everything is still a bit confused. The release of the RP2040 has been met with a lot of enthusiasm, and there's lots of versions (carrier boards) in different form factors. But if a board is using the RP2040 you can generally use the SDK to program it. There might be hardware unique to a specific carrier board, like battery management or an RGB LED or something, but the RP2040 is what you're programming, so I'd say the SDK should be fine.

I've got a RPi Pico and a couple of Itsy Bitsy RP2040s that I haven't had time to actually begin playing with... yet! 😆

small meteor Jun 10, 2021, 9:56 AM

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@small meteor

cmake .. -D"PICO_BOARD=adafruit_feather_rp2040"

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(from pico-examples/build directory)

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https://github.com/wa1tnr/camelforth-rp2040-b-MS-U/blob/main/17-camelforth-b.d/pico-examples/build/run_cmake_feather.sh

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Do the same for any of these targets (replacing what you see, above):

adafruit_feather_rp2040
adafruit_itsybitsy_rp2040
adafruit_qtpy_rp2040
arduino_nano_rp2040_connect
none
pico
pimoroni_keybow2040
pimoroni_pga2040
pimoroni_picolipo_16mb
pimoroni_picolipo_4mb
pimoroni_picosystem
pimoroni_tiny2040
sparkfun_micromod
sparkfun_promicro
sparkfun_thingplus
vgaboard

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Remove .h from these filenames to obtain the string to build for any of them:
https://github.com/raspberrypi/pico-sdk/tree/master/src/boards/include/boards

small meteor Jun 10, 2021, 12:31 PM

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small meteor <@456226577798135808> ```bash cmake .. -D"PICO_BOARD=adafruit_feather_rp2040" ``...

thank you, will try it soon 🙂
still confuse with what is that but let's see hehe

red bay Jun 10, 2021, 2:07 PM

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small meteor hey guys, i have a question here, does someone have experience use C++ for adafr...

Yes you can. It is too bad that there is such a stress to direct people to the various Pythons, but I understand why. Still, the GPIO numbering would have been nice on the Adafruit boards

wet mulch Jun 10, 2021, 2:24 PM

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Hello makers,
I've a question about HID with Pico.
I'm working on a project nowadays. I use Raspi Pico as a mouse on circuitpython with adafruit hid library.
I would like to know status of mouse's left clik. Is that possible? If yes how can I do that?

small meteor Jun 10, 2021, 2:43 PM

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@small meteor It's the same idea as CC=gcc make

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You're setting a string into the environment, essentially. In this case, you're choosing a non-default target (There are so many targets to build for; this is the mechanism to select which target platform is used to compile subtle differences, for).

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So some targets may only have 4 megabytes of flashROM; others, 8 mb.

wind pier Jun 11, 2021, 1:21 PM

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Hi! I have an adafruit_feather_rp2040 and an adafruit_qtpy_rp2040 and a featherwing oled 128x64 and would like to know how to use the 3 buttons A, B, C in the oled. Would you help me? I'm using from CircuitPython.

eternal grove Jun 11, 2021, 2:43 PM

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The waveform generator tutorial uses the buttons, the code that does so is covered here https://learn.adafruit.com/waveform-generator/code

Adafruit Learning System

Feather Waveform Generator in CircuitPython

This device has many names: function generator, waveform generator, and signal generator. As we all know... you can't stop the signal.

wind pier Jun 11, 2021, 7:39 PM

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Thanks!

small meteor Jun 16, 2021, 12:30 PM

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hey peeps 🙂

i want to continue my question installing c++ for adafruit feather rp2040.. do we need spesific file to install it like circuit python or no. bcs i tried to follow the installing c++ from the pdf and tried to put my blink.uf2 but suddenly my board just turn off, didnt connected and no blinked led.
thanks 🙂

eternal grove Jun 16, 2021, 2:16 PM

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Normally you don't "install" C++, just compile the code and upload it to the board.

small meteor Jun 16, 2021, 3:21 PM

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ah yeah that's what i mean. but now it's fine. i tried @small meteor solution and all good. thanks 🙂

gusty cloud Jun 16, 2021, 11:29 PM

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I'm experimenting with gpio on Pico, and when I send an output pin low, gnd and that pin doesn't have continuity when powered by vsys

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But it has continuity when powered by usb

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Why?

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Or is it actually metering non zero voltage...

eternal grove Jun 16, 2021, 11:48 PM

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Did you try continuity both ways?

gusty cloud Jun 16, 2021, 11:51 PM

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oh, interesting, it's because it's 55ohms and not 0ohms