Arduino Help | Rust Programming Language Community | Page 2

coral geyser Jul 28, 2022, 4:19 AM

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If you did

let dp = arduino_hal::Peripherals::take().unwrap();
let dp2 = arduino_hal::Peripherals::take().unwrap();

You now have 2 descriptions of the microcontroller, but you only have one actual one

wary cloak Jul 28, 2022, 4:19 AM

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So the pins macro from the library take the "database" As an argument to store the available pins, right?

coral geyser Jul 28, 2022, 4:19 AM

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wary cloak So the pins macro from the library take the "database" As an argument to store t...

yep

coral geyser Jul 28, 2022, 4:19 AM

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wary cloak So the pins macro from the library take the "database" As an argument to store t...

well get the pins

wary cloak Jul 28, 2022, 4:19 AM

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But I didn't understand at all yet what's stored in dp

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What does the pheripheral method do

coral geyser Jul 28, 2022, 4:20 AM

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Because to a microcontroller a pin is just a specific spot in memory has a 0 or a 1

coral geyser Jul 28, 2022, 4:20 AM

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wary cloak But I didn't understand at all yet what's stored in dp

That has to do with how this is a hardware abstraction library. It is abstract over all the avr microcontrollers

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So like how a Arduino Uno has less stuff than a Mega the Peripherals struct knows what exists

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And it can be used by other code to know what it can do

wary cloak Jul 28, 2022, 4:21 AM

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Oh so pheripheral is a struck

coral geyser Jul 28, 2022, 4:22 AM

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yep, it looks like https://rahix.github.io/avr-hal/src/avr_device/devices/atmega328p/mod.rs.html#489

mod.rs - source

Source of the Rust file /home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/avr-device-0.3.4/src/devices/atmega328p/mod.rs.

wary cloak Jul 28, 2022, 4:22 AM

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And it stores in what Micro components ate connected to see what it can and cannot do?

coral geyser Jul 28, 2022, 4:22 AM

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yep

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In a generic way to make it easier for other code to use

wary cloak Jul 28, 2022, 4:22 AM

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And what does the take method on the pheripheral struct do?

coral geyser Jul 28, 2022, 4:23 AM

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wary cloak And what does the take method on the pheripheral struct do?

It says we want to take ownership of all the peripherals

wary cloak Jul 28, 2022, 4:23 AM

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And it can fail for any reason so it returns a result type we now it won't so me call unwrap?

coral geyser Jul 28, 2022, 4:23 AM

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Like we don't want 2 Pin5 structs that think they can both control pin 5 at the same time

wary cloak Jul 28, 2022, 4:23 AM

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Do why would or fail

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Tho"

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It*

coral geyser Jul 28, 2022, 4:24 AM

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wary cloak And it can fail for any reason so it returns a result type we now it won't so me...

It returns an Option because we may have already taken it before

wary cloak Jul 28, 2022, 4:24 AM

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Oh

coral geyser Jul 28, 2022, 4:24 AM

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let dp = arduino_hal::Peripherals::take().unwrap();
let dp2 = arduino_hal::Peripherals::take().unwrap();

this would be bad

wary cloak Jul 28, 2022, 4:24 AM

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Makes sense :0

wary cloak Jul 28, 2022, 4:24 AM

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coral geyser Like we don't want 2 Pin5 structs that think they can both control pin 5 at the ...

The pins macro generates a struct for all pins available?

coral geyser Jul 28, 2022, 4:24 AM

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Now code can own specific parts of the microcontroller

coral geyser Jul 28, 2022, 4:24 AM

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wary cloak The pins macro generates a struct for all pins available?

yep

wary cloak Jul 28, 2022, 4:25 AM

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So the dp and pins parts is something I'll always do to right?

coral geyser Jul 28, 2022, 4:25 AM

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wary cloak So the dp and pins parts is something I'll always do to right?

Likely, you can bypass them if you need to access some of the pins the general one doesn't have

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Like the Mega has a lot of pins not in the general set

wary cloak Jul 28, 2022, 4:26 AM

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But wouldn't I need the dp for a lot of stuff?

coral geyser Jul 28, 2022, 4:26 AM

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wary cloak But wouldn't I need the dp for a lot of stuff?

yes you will almost always need the dp

wary cloak Jul 28, 2022, 4:27 AM

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But maybe not pins macro ok got it

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Why is the led variable mutable?

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Ah

coral geyser Jul 28, 2022, 4:27 AM

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wary cloak Why is the led variable mutable?

ah, because we want to blink it. and to do that we need to change it's state from on to off and back

wary cloak Jul 28, 2022, 4:27 AM

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Because it will change from 1 to 0 all the time?

coral geyser Jul 28, 2022, 4:28 AM

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yep

wary cloak Jul 28, 2022, 4:28 AM

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Oh

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Do all the pins from 0 to 52 be named, d0, d1, d15 and so?

coral geyser Jul 28, 2022, 4:29 AM

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wary cloak Do all the pins from 0 to 52 be named, d0, d1, d15 and so?

yep all the usable ones on a Mega board are available https://github.com/Rahix/avr-hal/blob/main/arduino-hal/src/port/mega2560.rs

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The d is for digital

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There are also the analog ones with "a"

wary cloak Jul 28, 2022, 4:31 AM

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So we create the mutable variable led, access the pin 13 from the pins variable that stored whatever was the result of calling the macro and called the method from the pin 13 struct into_output to say to the program this pin is an output?

coral geyser Jul 28, 2022, 4:31 AM

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wary cloak So we create the mutable variable led, access the pin 13 from the pins variable...

yep, the into_output is like the pin mode in Arduino, but it's enforced by the type system

wary cloak Jul 28, 2022, 4:32 AM

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So we have a variable that stores a pin and wherever is an input or an output, it will be mutable and have the name of our pheripheral

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Right?

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So we will always do this also like doing pin mode

coral geyser Jul 28, 2022, 4:32 AM

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wary cloak So we have a variable that stores a pin and wherever is an input or an output, i...

yep

wary cloak Jul 28, 2022, 4:32 AM

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Tho there's another why to set pins to output or inputs that was all that PORTB stuff and so

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That idk if it's supported here

coral geyser Jul 28, 2022, 4:33 AM

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We now have set digital pin 13 to output and are ready to turn it on and off

wary cloak Jul 28, 2022, 4:33 AM

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But anyways that wouke finish the setup part that it's main and we enter the loop part just like Arduino

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Now I understand

coral geyser Jul 28, 2022, 4:33 AM

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wary cloak Tho there's another why to set pins to output or inputs that was all that PORTB ...

Input vs output changes how the hardware in the microcontroller is setup so it can either send electricity or receive it

wary cloak Jul 28, 2022, 4:34 AM

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Why you said that about the setup part executing one now it makes sense

coral geyser Jul 28, 2022, 4:34 AM

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Yep now we start a loop and keep toggling the pin and waiting

wary cloak Jul 28, 2022, 4:35 AM

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coral geyser Input vs output changes how the hardware in the microcontroller is setup so it c...

What I was asking if you can like in Arduino do I think it was something like..

      DDRD = 0xF0

coral geyser Jul 28, 2022, 4:35 AM

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wary cloak What I was asking if you can like in Arduino do I think it was something like.. ...

oh yeah you can if you have to

wary cloak Jul 28, 2022, 4:35 AM

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It's comfortable when you use a lot of pins

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What's the meaning of toggle?

coral geyser Jul 28, 2022, 4:36 AM

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wary cloak What's the meaning of toggle?

switch the state of the pin to the opposite, on -> off, off -> on

wary cloak Jul 28, 2022, 4:36 AM

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Oh

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Toggle is a method for every pin to switch it to the opposite state?

coral geyser Jul 28, 2022, 4:37 AM

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yep

wary cloak Jul 28, 2022, 4:37 AM

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Which in this case would turn the led either on or off

coral geyser Jul 28, 2022, 4:37 AM

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there is also set_high() set_low()

coral geyser Jul 28, 2022, 4:37 AM

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wary cloak Which in this case would turn the led either on or off

yep

wary cloak Jul 28, 2022, 4:38 AM

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And I say to delay here we call the delay_ms function from the library and pass the milliseconds it calls my attention the ms, does it support delays in other ways?

coral geyser Jul 28, 2022, 4:38 AM

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Like in seconds?

wary cloak Jul 28, 2022, 4:39 AM

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For example yes

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Because it's called delay in ms

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And not just delay

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Maybe there's delay_sc

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Or smth

coral geyser Jul 28, 2022, 4:39 AM

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it has ms and us

wary cloak Jul 28, 2022, 4:39 AM

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U for micro?

coral geyser Jul 28, 2022, 4:39 AM

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yep

wary cloak Jul 28, 2022, 4:39 AM

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Ok last question

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I was wondering

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For when it's just a led that uses one pin to control it's fine but

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I wonder when we use the RFID for example what are we calling our variables (?

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Just had the thought

coral geyser Jul 28, 2022, 4:41 AM

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like when you have many pins?

wary cloak Jul 28, 2022, 4:41 AM

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And btw this is surprisingly very familiar I mean it's totally how I would imagine it to be, just like programming C++ in Arduino but is rust in VS code the level of abstraction is the same almost, I thought it was gonna be lower level, or is it just because the simplicity of this program that it's almost as easy as Arduino?

wary cloak Jul 28, 2022, 4:41 AM

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coral geyser like when you have many pins?

Yeah

coral geyser Jul 28, 2022, 4:42 AM

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wary cloak Yeah

You can store them in a struct

pub struct ShiftRegister<Data, Clock, Latch> {
    data: Pin<Output, Data>,
    clock: Pin<Output, Clock>,
    latch: Pin<Output, Latch>,
}

https://gitlab.com/konnorandrews/8-bit-computer/-/blob/main/eeprom/programmer/src/shift.rs#L4

wary cloak Jul 28, 2022, 4:42 AM

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Oh

coral geyser Jul 28, 2022, 4:42 AM

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And because we own the pins we know no other safe code will touch them

wary cloak Jul 28, 2022, 4:43 AM

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wary cloak And btw this is surprisingly very familiar I mean it's totally how I would imagi...

.

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It calls my attention how not that hard it was

coral geyser Jul 28, 2022, 4:43 AM

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wary cloak And btw this is surprisingly very familiar I mean it's totally how I would imagi...

The part you may find lower is if there isn't a library for something you want to talk to

wary cloak Jul 28, 2022, 4:43 AM

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Yeah that worries me..

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But otherwise it would just like what I've been doing but in rust?

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Because that's so fucking cook

coral geyser Jul 28, 2022, 4:44 AM

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Also before we end, if you need docs for the libraries involved use cargo doc --open to generate local ones. The online ones are setup for the Arduino Uno

coral geyser Jul 28, 2022, 4:44 AM

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wary cloak But otherwise it would just like what I've been doing but in rust?

yep

wary cloak Jul 28, 2022, 4:44 AM

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Because it would be even more comfortable because I'm in a language that I understand a bit more, that has cooler tools like iterators and that has compile error messages that make me confident to try

coral geyser Jul 28, 2022, 4:45 AM

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wary cloak But otherwise it would just like what I've been doing but in rust?

The people that work on this have done good to make it as friendly as possible without loosing the control you sometimes need

wary cloak Jul 28, 2022, 4:45 AM

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But there's a small concern

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The only bad part

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Is that I won't be able to work the code at school when I have the subject

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Because you literally have to install so many things and of course the computers there don't have it

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Because they don't even know rust

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We have Vs code and Arduino ofc

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But why would they have all the rust tools(?

coral geyser Jul 28, 2022, 4:46 AM

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wary cloak Is that I won't be able to work the code at school when I have the subject

hmm, yeah that is an issue

wary cloak Jul 28, 2022, 4:46 AM

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And I ain't that garbage of a computer there

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It would be a pain

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There's one person that does do that

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Which is..

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Interesting

wary cloak Jul 28, 2022, 4:47 AM

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coral geyser hmm, yeah that is an issue

Yeah because I want to upload the code live to test it or if a dumbass presses reset

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And also show the code and ofc be able to work on it

coral geyser Jul 28, 2022, 4:48 AM

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wary cloak Yeah because I want to upload the code live to test it or if a dumbass presses r...

You don't need to reprogram it if you turn it off ferrisHmm

wary cloak Jul 28, 2022, 4:48 AM

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Do you think there's any solution aside from taking my computer there?

coral geyser Jul 28, 2022, 4:48 AM

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wary cloak Do you think there's any solution aside from taking my computer there?

You could put a rustc on a usb drive

wary cloak Jul 28, 2022, 4:48 AM

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Because also it may be kinda snobbish but.. I wanna show them what I use and if interested teach them

wary cloak Jul 28, 2022, 4:49 AM

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coral geyser You could put a rustc on a usb drive

Buy an USB and save all that million filed I downloaded on an USB?

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Files*

coral geyser Jul 28, 2022, 4:49 AM

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wary cloak Buy an USB and save all that million filed I downloaded on an USB?

Yeah, though the one part you can't is the microsoft build tools

wary cloak Jul 28, 2022, 4:50 AM

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Idk how that works but that would make that just by plugin the USB I will have all the files so I could work just like home? (But likely with more ram)

coral geyser Jul 28, 2022, 4:50 AM

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which I doubt they have on those machines

wary cloak Jul 28, 2022, 4:50 AM

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coral geyser Yeah, though the one part you can't is the microsoft build tools

Oh-

coral geyser Jul 28, 2022, 4:50 AM

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wary cloak Idk how that works but that would make that just by plugin the USB I will have a...

yeah, you can tell rustup to keep everything on a USB drive

wary cloak Jul 28, 2022, 4:50 AM

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Ok we'll do that but later I mean

coral geyser Jul 28, 2022, 4:50 AM

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wary cloak Oh-

Microsoft be stupid

wary cloak Jul 28, 2022, 4:50 AM

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I don't have classes until Monday

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And also I don't have that subject until Wednesday

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Which is the only day I have it

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So we have time

wary cloak Jul 28, 2022, 4:51 AM

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coral geyser Microsoft be stupid

So the USB plan won't work?

coral geyser Jul 28, 2022, 4:51 AM

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Actually, you may not need the build tools if you prep it on your computer before hand

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As the arduino building doesn't need it

wary cloak Jul 28, 2022, 4:52 AM

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But I wanna code in school too (or I didn't understand what you said)

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Like

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Preparing the folder the cargo build

coral geyser Jul 28, 2022, 4:52 AM

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wary cloak But I wanna code in school too (or I didn't understand what you said)

I think you can do it. I can try it on my machine later if you want

wary cloak Jul 28, 2022, 4:52 AM

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And then just write the code in Vs code and hit run since its already built

wary cloak Jul 28, 2022, 4:53 AM

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coral geyser I think you can do it. I can try it on my machine later if you want

I would thank you

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Last question and I'll let you finally count sheeps

coral geyser Jul 28, 2022, 4:53 AM

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wary cloak And then just write the code in Vs code and hit run since its already built

yep, you need the microsoft build tools if you build for windows, but you are building for Arduino ferrisHmm

wary cloak Jul 28, 2022, 4:53 AM

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Out of curiosity

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What's next? What are we doing tomorrow? Learning how to control the LCD which would be the first component?

coral geyser Jul 28, 2022, 4:54 AM

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sounds fun

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now it's whatever you want to try to get working

wary cloak Jul 28, 2022, 4:54 AM

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It's either that or idk what else could be

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Yeah then just like I did in Arduino

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LCD
Matriciak keyboard

Both together

Relays with the stuff idk how to spell

RFID feature by feature

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As long as we have a library it shouldn't take long

coral geyser Jul 28, 2022, 4:55 AM

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I will probably busy for some of tomorrow not sure when, a friend comes back from a trip and we have a Starcraft 2 session planned

wary cloak Jul 28, 2022, 4:55 AM

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But if we don't.. That's where it would get complicated

wary cloak Jul 28, 2022, 4:56 AM

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coral geyser I will probably busy for some of tomorrow not sure when, a friend comes back fro...

Np actually I usually do this as night as you see but tomorrow at my 20:00 I go somewhere actually if I go alone and know one takes me there, earlier

wary cloak Jul 28, 2022, 4:57 AM

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wary cloak As long as we have a library it shouldn't take long

I did all of that excepting RFID in more or less a week

coral geyser Jul 28, 2022, 4:57 AM

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wary cloak But if we don't.. That's where it would get complicated

datasheet time ferrisButGrimacing

wary cloak Jul 28, 2022, 4:57 AM

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My goal which I hope isn't unachievable

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Is to have all but the RFID so, the basic functionality of the project, LCD, keyboard, relays activating at the right moment so on Wednesday when we test it in the actual thing like the thing we are building

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See that it works in a real scenario

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I wonder what's gonna be their face when I come and say

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Hey,re Writting the project in another language because I felt like it (and because Cpp sucks)

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And test 2 codes, the Arduino one and the rust one

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So I'll upload both one at a time

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Hope I get that on time

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Anyways

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Thank you very much for your kind support and knowledge

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Good night

coral geyser Jul 28, 2022, 5:00 AM

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wary cloak Thank you very much for your kind support and knowledge

no problem, happy to help ferristhumbsup

wary cloak Jul 28, 2022, 5:00 AM

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ferrisParty

wary cloak Jul 28, 2022, 6:45 PM

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I'm off for another round

wary cloak Jul 28, 2022, 10:23 PM

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Hey, how do you look for libraries? (I won't accept GitHub as an answer)

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Because the first step would be to find an LCD display library

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Tho I have to leave soon but at least maybe we can find the library to have it hand for tomorrow

wary cloak Jul 28, 2022, 10:23 PM

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wary cloak Because the first step would be to find an LCD display library

I'll be more specific

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Is an LCD display with I2C 20x4

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Idk if it will be a pain or not the fact that I use I2C

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For me at least I just need four wires instead of like 8 of them and two of those for are GND and VCC

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LCD I think is such a common component that there should be a dependency for it

coral geyser Jul 28, 2022, 10:27 PM

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wary cloak Hey, how do you look for libraries? (I won't accept GitHub as an answer)

crates.io

wary cloak Jul 28, 2022, 10:27 PM

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Yay

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Tho I haven't gone there either

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Is there abstractions for other arquitectures like the AVR one we are using? Do you find it also in crates.io or in another place?

coral geyser Jul 28, 2022, 10:29 PM

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Almost everything available will be on crates.io

wary cloak Jul 28, 2022, 10:29 PM

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I love you rust community..

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Well are there? (Honestly just because I want the raspberry Pi pico) and also..

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I can't change the microcontroller now but

coral geyser Jul 28, 2022, 10:31 PM

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wary cloak Is an LCD display with I2C 20x4

Do you know if it's a https://docs.rs/lcd/latest/lcd/ type lcd?

lcd - Rust

Library that implements low-level protocol to the Hitachi HD44780-compatible LCD device.

wary cloak Jul 28, 2022, 10:31 PM

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Would recommend me another microcontroller for a project like this or what would you had use?

wary cloak Jul 28, 2022, 10:32 PM

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coral geyser Do you know if it's a https://docs.rs/lcd/latest/lcd/ type lcd?

Honestly I only now the LCD display 20x4 with I2C part the rest I have no clue tbh

coral geyser Jul 28, 2022, 10:32 PM

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wary cloak Would recommend me another microcontroller for a project like this or what would...

That is a difficult question, but probably just an Uno

wary cloak Jul 28, 2022, 10:32 PM

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Is there any part or the micro component it could be written it?

wary cloak Jul 28, 2022, 10:32 PM

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coral geyser That is a difficult question, but probably just an Uno

Oh so an arduino still

coral geyser Jul 28, 2022, 10:32 PM

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wary cloak Oh so an arduino still

I have them so 🤷‍♂️

wary cloak Jul 28, 2022, 10:33 PM

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Tho thanks to using the MEGA I have enough VCC and GND pins to test everything at once without using a breadboard

coral geyser Jul 28, 2022, 10:33 PM

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We could spend a few days looking at microcontrollers if you wanted to find the "best" one for the job

wary cloak Jul 28, 2022, 10:33 PM

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coral geyser I have them so 🤷‍♂️

I thought you would came out with a weird microcontroller name I never heard about (?

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Like the ESP something or really anything because I only barely now ESP, arduino ofc and raspberry Pi pico

coral geyser Jul 28, 2022, 10:33 PM

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In truth I would probably use an FPGA, because I like using them

wary cloak Jul 28, 2022, 10:34 PM

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So excepting if you need more memory or pins, really whatever works?

coral geyser Jul 28, 2022, 10:34 PM

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Yeah

wary cloak Jul 28, 2022, 10:34 PM

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Well how could I know the information you need to know about my LCD?

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Because I was going to bought it only bit

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But*

coral geyser Jul 28, 2022, 10:34 PM

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coral geyser In truth I would probably use an FPGA, because I like using them

Who needs a microcontroller when you can just have a programmable circuit

coral geyser Jul 28, 2022, 10:35 PM

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wary cloak Well how could I know the information you need to know about my LCD?

It would have a part number on the back probably

wary cloak Jul 28, 2022, 10:35 PM

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A friend of mine offered for bought it in an electronic house near it's job so we wouldn't have to pay to send it our way

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That?

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It already has the I2C on it as you can see ofc

coral geyser Jul 28, 2022, 10:37 PM

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https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.amazon.com/HiLetgo-HD44780-Character-Backlight-InterfaceAdapter/dp/B082Y37WXG&ved=2ahUKEwjemIXQ0pz5AhUjHjQIHU6ICJwQFnoECA4QAQ&usg=AOvVaw3hwLEW12Qh3E2aEiQXzhEs

wary cloak Jul 28, 2022, 10:39 PM

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What's that?

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Well it's basically that one or it's highly identical

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Btw as I asked, it bothers having to work the I2C or it makes it easier?

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Mainly because when I told you about the RFID using SPI you said is kinda easier but also harder

coral geyser Jul 28, 2022, 10:47 PM

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It's fine, I found https://github.com/wfraser/lcd-pcf8574 which you can base it off of. We just need to use the arduino_hal version of the i2c

GitHub

GitHub - wfraser/lcd-pcf8574: Rust support for some common I2C LCD ...

Rust support for some common I2C LCD modules. Contribute to wfraser/lcd-pcf8574 development by creating an account on GitHub.

wary cloak Jul 28, 2022, 10:48 PM

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Arduino_hal version of the I2C?

coral geyser Jul 28, 2022, 10:49 PM

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https://rahix.github.io/avr-hal/arduino_hal/i2c/index.html the repo above is for raspberry pi boards

arduino_hal::i2c - Rust

API documentation for the Rust i2c mod in crate arduino_hal.

coral geyser Jul 28, 2022, 10:50 PM

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coral geyser Do you know if it's a https://docs.rs/lcd/latest/lcd/ type lcd?

This crate ^ should do all the heaving lifting for actually controlling the lcd

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You just need to tell it how to use the i2c device to talk to it

wary cloak Jul 28, 2022, 10:51 PM

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So the LCD part is abstracted but the I2C is on our part?

coral geyser Jul 28, 2022, 10:51 PM

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Yep

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Which shouldn't be that bad

wary cloak Jul 28, 2022, 10:52 PM

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I hope it's not

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So this dependency we handle it like any other by adding the name and version in the cargo toml file?

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Tho which of the two

coral geyser Jul 28, 2022, 10:54 PM

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wary cloak So this dependency we handle it like any other by adding the name and version in...

https://docs.rs/lcd/latest/lcd/ will be a dependancy the other is just for reference

lcd - Rust

Library that implements low-level protocol to the Hitachi HD44780-compatible LCD device.

wary cloak Jul 28, 2022, 10:55 PM

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And in which toml I add that?

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And what version is?

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So you know

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I type " lcd = 0.8.0"

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Or smth

coral geyser Jul 28, 2022, 10:56 PM

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Version 0.4.1

coral geyser Jul 28, 2022, 10:56 PM

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wary cloak And in which toml I add that?

cargo.toml

wary cloak Jul 28, 2022, 10:57 PM

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lcd = "0.4.1" in the principal toml file in the dependency section

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Right?

coral geyser Jul 28, 2022, 10:57 PM

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Yep

wary cloak Jul 28, 2022, 10:57 PM

#

Have you use it before?

coral geyser Jul 28, 2022, 10:57 PM

#

Not this one, but it looks good

wary cloak Jul 28, 2022, 10:58 PM

#

Next idk if it'll help but I thought I could show how the implementation was for the arduino under the library I used

#

At least to show what I want it to do

#

But there's let's say two version

#

First when I used it as it was, manually

#

But then I created a function for it (which took me some time)

#

That handled a lot of the stuff

#

Like automatically centering the message but only if I told it to or I could chose where it would begin

#

Tell me if it was too long the string I was pasing

#

And stuff

#

I actually even used an struct

#

Tho idk it'll actually help I thought it could serve as reference maybe

coral geyser Jul 28, 2022, 11:02 PM

#

You can definitely use that as a base, but it's probably a good idea to get it so that the lcd library can talk to your display so you know it works

wary cloak Jul 28, 2022, 11:03 PM

#

It's just for reference of the logic and steps let's say of course I don't want to call that code or anything I want to use only rust and it's tools

#

Let me look for it

#

Tho I think I could take the opportunity and

coral geyser Jul 28, 2022, 11:03 PM

#

The lcd crate should be nicer to work with be use you can do things like this

#

?eval println!("{:^20}", 123);

robust mountainBOT Jul 28, 2022, 11:04 PM

#

        123         
()

wary cloak Jul 28, 2022, 11:04 PM

#

Send the whole code for the base functionality of the project (LCD, keyboard, relay) because it's actually short, I'll show you the original version when I just learned how to use the libraries and the version with functions to avoid repetition

coral geyser Jul 28, 2022, 11:04 PM

#

robust mountain ```rust 123 () ```

Automatic centering

wary cloak Jul 28, 2022, 11:05 PM

#

Btw I did the automatic centering optional because there was text I wanted to start from the beginning and looked weird otherwise

#

Well let me look for it I also have to prepare to leave soon which it's a shame but I'll try to at least show you that before so we have everything to work with tomorrow

coral geyser Jul 28, 2022, 11:06 PM

#

Ok

wary cloak Jul 28, 2022, 11:10 PM

#

Ok this is first version using the librariea as they are

#

You'll see unnecessary repetition it was made like 2 months ago or so

#

#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

const byte FILAS = 4;
const byte COLUMNAS = 4;

const char keys[FILAS][COLUMNAS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

const byte pinColumnas[COLUMNAS] = {22, 23, 24, 25};
const byte pinFilas[FILAS] = {26, 27, 28, 29};

Keypad keypad(makeKeymap(keys), pinFilas, pinColumnas, FILAS, COLUMNAS);

char tecla;
bool confirmacion=0;

void setup() {
  pinMode(2, OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  lcd.init();
  lcd.backlight();
}

void loop(){ 

  do{
    lcd.setCursor(3,0);
    lcd.print("Elija una bebida");
    lcd.setCursor(1,1);
    lcd.print("1-Fernet con Coca");
    lcd.setCursor(1,2);
    lcd.print("2-Sex on the beach");
    lcd.setCursor(1,3);
    lcd.print("3-Agua");
    tecla=keypad.waitForKey();
    if(tecla=='1'){
      confirmacion=1;
    }
    else if(tecla=='2'||tecla=='3'){
      lcd.clear();
      lcd.setCursor(3,0);
      lcd.print("Bebida");
      lcd.setCursor(3,1);
      lcd.print("No disponible");
      confirmacion=0;
      delay(1000);

    }
    else{
      lcd.clear();
      lcd.setCursor(3,0);
      lcd.print("elija un");
      lcd.setCursor(3,1);
      lcd.print("valor valido");
      confirmacion=0;
      delay(1000);
    }
  } while(confirmacion!=1);

#

do{
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Elija la intensidad");
    lcd.setCursor(1,1);
    lcd.print("1-Suave");
    lcd.setCursor(1,2);
    lcd.print("2-Medio");
    lcd.setCursor(1,3);
    lcd.print("3-Fuerte");
    tecla=keypad.waitForKey();
    if(tecla=='1'||tecla=='2'||tecla=='3'){
      confirmacion=1;
    }
    else{
      lcd.clear();
      lcd.setCursor(3,0);
      lcd.print("elija un");
      lcd.setCursor(3,1);
      lcd.print("valor valido");
      confirmacion=0;
      delay(1000);
    }
  } while(confirmacion!=1);

  lcd.clear();
  lcd.setCursor(3,1);
  lcd.print("Preparando...");
  lcd.cursor();
  lcd.blink();

#

if(confirmacion==1){
    switch(tecla){
      case '1':
      digitalWrite(5,HIGH);
      delay(2000);
      digitalWrite(5,LOW);
      delay(1000);
      digitalWrite(4,HIGH);
      delay(4000);
      digitalWrite(4,LOW);
      delay(1000);
      digitalWrite(3,HIGH);
      delay(4000);
      digitalWrite(3,LOW);
      delay(1000);
      digitalWrite(2,HIGH);
      delay(4000);
      digitalWrite(2,LOW);
      delay(1000);
      break;
      case '2':
      digitalWrite(5,HIGH);
      delay(5000);
      digitalWrite(5,LOW);
      delay(1000);
      digitalWrite(4,HIGH);
      delay(3000);
      digitalWrite(4,LOW);
      delay(1000);
      digitalWrite(3,HIGH);
      delay(3000);
      digitalWrite(3,LOW);
      delay(1000);
      digitalWrite(2,HIGH);
      delay(3000);
      digitalWrite(2,LOW);
      delay(1000);
      break;
      case '3':
      digitalWrite(5,HIGH);
      delay(8000);
      digitalWrite(5,LOW);
      delay(1000);
      digitalWrite(4,HIGH);
      delay(2000);
      digitalWrite(4,LOW);
      delay(1000);
      digitalWrite(3,HIGH);
      delay(2000);
      digitalWrite(3,LOW);
      delay(1000);
      digitalWrite(2,HIGH);
      delay(2000);
      digitalWrite(2,LOW);
      delay(1000);
      break;
      
    }
  }
  lcd.noCursor();
  lcd.noBlink();
}

#

Pretty simple as is

#

Now I'll show you the last version improved with home made functions

#

Specially for that last switch statement

#

Ok here it is the last version

#

#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

#define PIN_ALCHOHOL 5
#define PIN_ACOMPANANTE1 4
#define PIN_ACOMPANANTE2 3
#define PIN_ACOMPANANTE3 2

struct PrintOptions {
  String toPrint;
  int pos;
};

const PrintOptions empty = {"", 0};

LiquidCrystal_I2C lcd(0x27, 20, 4);

const byte FILAS = 4;
const byte COLUMNAS = 4;

const char keys[FILAS][COLUMNAS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

const byte pinColumnas[COLUMNAS] = {22, 23, 24, 25};
const byte pinFilas[FILAS] = {26, 27, 28, 29};

Keypad keypad(makeKeymap(keys), pinFilas, pinColumnas, FILAS, COLUMNAS);

char tecla;
bool confirmacion=0;

void imprimirFila(byte posY, byte posX, String fila){
  if(fila != ""){
    byte caracteres_restantes = 20 - fila.length();

    if(caracteres_restantes<0){
      lcd.print("muy largo 1");
    }
  byte posicionX = posX == 'c'? (caracteres_restantes/2) : posX;
  lcd.setCursor(posicionX,posY);
  lcd.print(fila);

  }
}

void imprimir(PrintOptions fila1 = empty, PrintOptions fila2 = empty, PrintOptions fila3 = empty, PrintOptions fila4 = empty) {
  imprimirFila(0, fila1.pos, fila1.toPrint);
  imprimirFila(1, fila2.pos, fila2.toPrint);
  imprimirFila(2, fila3.pos, fila3.toPrint);
  imprimirFila(3, fila4.pos, fila4.toPrint);
}

void Barman (int delay_alchohol, int delay_acompanante1 , int delay_acompanante2, int delay_acompanante3){
      digitalWrite(PIN_ALCHOHOL,HIGH);
      delay(delay_alchohol);
      digitalWrite(PIN_ALCHOHOL,LOW);
      delay(1000);
      digitalWrite(PIN_ACOMPANANTE1,HIGH);
      delay(delay_acompanante1);
      digitalWrite(PIN_ACOMPANANTE1,LOW);
      delay(1000);
      digitalWrite(PIN_ACOMPANANTE2,HIGH);
      delay(delay_acompanante2);
      digitalWrite(PIN_ACOMPANANTE2,LOW);
      delay(1000);
      digitalWrite(PIN_ACOMPANANTE3,HIGH);
      delay(delay_acompanante3);
      digitalWrite(PIN_ACOMPANANTE3,LOW);
      delay(1000);
}

#

void setup() {
  pinMode(2, OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  lcd.init();
  lcd.backlight();
}

void loop(){ 

  do{
    imprimir(
    { "Elija una bebida",  'c' },
    { "1-Fernet con Coca",  0  },
    { "2-Sex on the beach", 0  },
    { "3-Agua",             0  }
    );
    

    tecla=keypad.waitForKey();
    if(tecla=='1'){
      confirmacion=1;
    }
    else if(tecla=='2'||tecla=='3'){
      lcd.clear();
      imprimir(
      { "Bebida", 'c'},
      { "No Disponible", 'c'}
      );
      confirmacion=0;
      delay(1000);

    }
    else{
      lcd.clear();
      imprimir(
      { "elija un", 'c'},
      { "valor valido", 'c'}
      );
      confirmacion=0;
      delay(1000);
    }
  } while(confirmacion!=1);

  do{
    lcd.clear();
    imprimir(
    { "Elija la intensidad", 'c'},
    { "1-Suave", 0},
    { "2-Medio", 0},
    { "3-Fuerte", 0}
    );
    tecla=keypad.waitForKey();
    if(tecla=='1'||tecla=='2'||tecla=='3'){
      confirmacion=1;
    }
    else{
      lcd.clear();
      imprimir(
      { "elija un", 'c'},
      { "valor valido", 'c'}
      );
      confirmacion=0;
      delay(1000);
    }
  } while(confirmacion!=1);

  lcd.clear();
  imprimir(
    empty,
    { "preparando...", 'c'}
    );
  lcd.cursor();
  lcd.blink();
  
  if(confirmacion==1){
    int delay_alchohol;
    int delay_acompanante1;
    int delay_acompanante2;
    int delay_acompanante3;

#

switch(tecla){
      case '1':{
      delay_alchohol = 2000;
      delay_acompanante1 = 4000;
      delay_acompanante2 = 4000;
      delay_acompanante3 = 4000;
      Barman (delay_alchohol, delay_acompanante1, delay_acompanante2, delay_acompanante3);
      break;
      }
      case '2':{
      delay_alchohol = 5000;
      delay_acompanante1 = 3000;
      delay_acompanante2 = 3000;
      delay_acompanante3 = 3000;
      Barman (delay_alchohol, delay_acompanante1, delay_acompanante2, delay_acompanante3);
      break;
      }
      case '3':
      {
      delay_alchohol = 8000;
      delay_acompanante1 = 2000;
      delay_acompanante2 = 2000;
      delay_acompanante3 = 2000;
      Barman (delay_alchohol, delay_acompanante1, delay_acompanante2, delay_acompanante3);
      break;
      }
    }
  }
  lcd.noCursor();
  lcd.noBlink();
}

#

There it is

coral geyser Jul 28, 2022, 11:16 PM

#

Looks good

wary cloak Jul 28, 2022, 11:16 PM

#

The basic functionality of the project, LCD, Key board and relays

#

I have also a simulation if you need to see it in practice but that's up to you

#

And just for the record this is basically what I want to re write in rust first, ofc it's not all because there's the RFID missing but that's the most fundamental pillar of the project and the first goal

#

Ofc for now let's just focuse in the LCD part

coral geyser Jul 28, 2022, 11:19 PM

#

Make the LCD go blink ferrisHmm

wary cloak Jul 28, 2022, 11:19 PM

#

I would like to make it like the final version with a function like that, that makes it a lot easier to write whatever I want and it handles a lot of stuff without me having to repeat lcd.print, lcd.set cursor and so all the time

#

It already uses a struct so(?

#

I wonder just how different it'll be

#

Well I have like half an hour so let's see what can be done in that time let me be turning on my computer

#

No actually 20 minutes at best

#

Do I open vs code in the same folder as last time

coral geyser Jul 28, 2022, 11:22 PM

#

Yep

wary cloak Jul 28, 2022, 11:22 PM

#

So open the terminal CD'ing into it, using cargo new, CD'ing into it and calling . Code to open it in vs code?

#

What do we call the project?

#

Are we doing the full project in this or this folder with be for just making work the LCD and then we create another for each component?

#

(It's something I would do if)

#

Ig*

coral geyser Jul 28, 2022, 11:25 PM

#

wary cloak So open the terminal CD'ing into it, using cargo new, CD'ing into it and calling...

I would just use the one from before and build on it

wary cloak Jul 28, 2022, 11:25 PM

#

#

Cargo new there?

coral geyser Jul 28, 2022, 11:25 PM

#

This is where git would be nice ferrisPensive

coral geyser Jul 28, 2022, 11:25 PM

#

wary cloak Cargo new there?

No you can just use this one

wary cloak Jul 28, 2022, 11:26 PM

#

We would work in git instead of vs code?

coral geyser Jul 28, 2022, 11:26 PM

#

Or copy the avr-hal-template-main to a new folder so you don't have to set it all up again

wary cloak Jul 28, 2022, 11:26 PM

#

coral geyser No you can just use this one

I prefer doing one project for each component so I have it tidy and maybe I can call them in the final project or smth

coral geyser Jul 28, 2022, 11:27 PM

#

wary cloak We would work in git instead of vs code?

With git you could save the state, and then come back in the future even if you changed files

wary cloak Jul 28, 2022, 11:27 PM

#

Wait

#

I would have to setup all again with my current plan?

coral geyser Jul 28, 2022, 11:27 PM

#

wary cloak I would have to setup all again with my current plan?

Well you need the Cargo.toml and cargo/config.toml

wary cloak Jul 28, 2022, 11:27 PM

#

I can just copy paste them in the new folder from the old one

coral geyser Jul 28, 2022, 11:28 PM

#

wary cloak I can just copy paste them in the new folder from the old one

Yep you can

wary cloak Jul 28, 2022, 11:28 PM

#

Ok so..

coral geyser Jul 28, 2022, 11:28 PM

#

You should probably go in the cargo.toml and rename the project

wary cloak Jul 28, 2022, 11:28 PM

#

I run cargo new there when I stand in the terminal?

wary cloak Jul 28, 2022, 11:28 PM

#

wary cloak

Here

coral geyser Jul 28, 2022, 11:28 PM

#

wary cloak I run cargo new there when I stand in the terminal?

Go one directory back

wary cloak Jul 28, 2022, 11:28 PM

#

Oh ok

coral geyser Jul 28, 2022, 11:28 PM

#

I don't think you want them inside each other

wary cloak Jul 28, 2022, 11:29 PM

#

Having it on desktop is weird tho

#

#

Ready

coral geyser Jul 28, 2022, 11:29 PM

#

wary cloak Having it on desktop is weird tho

You can make a new folder to put them in

wary cloak Jul 28, 2022, 11:29 PM

#

Where do I create the folder?

coral geyser Jul 28, 2022, 11:29 PM

#

Wherever you want it

#

Doesn't matter

wary cloak Jul 28, 2022, 11:30 PM

#

Well I have a

#

Rust_Codes folder

#

For the book projects

#

I could do them there

coral geyser Jul 28, 2022, 11:30 PM

#

That works

wary cloak Jul 28, 2022, 11:30 PM

#

I thought it had to be in the avr-hal yes or yes

#

For us to use it

#

Or smth

coral geyser Jul 28, 2022, 11:30 PM

#

Nope, we good

wary cloak Jul 28, 2022, 11:31 PM

#

#

Ok so now cargo new?

#

Do I call it.. "rust_lcd"?

coral geyser Jul 28, 2022, 11:33 PM

#

Sure

wary cloak Jul 28, 2022, 11:33 PM

#

Ok I opened VS code let's make the set up

#

Mm it's weird

#

Literally nothing happened

#

I don't have any folder

coral geyser Jul 28, 2022, 11:34 PM

#

ferrisWhat

wary cloak Jul 28, 2022, 11:35 PM

#

#

Ignore the errors

#

But as you see

#

I did the usual

#

I'm in vs and..

#

Nothing

#

Well I went to open folder and opened it manually tho. . Weird

#

coral geyser Jul 28, 2022, 11:37 PM

#

🤷 I thought you just put code no .

wary cloak Jul 28, 2022, 11:37 PM

#

Windows

#

Well I will parallely open the one for yesterday and copy

#

Where do I create the other TOML file? Because last time I needed two and here it's one

coral geyser Jul 28, 2022, 11:38 PM

#

wary cloak Where do I create the other TOML file? Because last time I needed two and here i...

You will replace/add to the one their and then copy over the .cargo/config.toml one

#

And you will need the json file for the mega

wary cloak Jul 28, 2022, 11:39 PM

#

coral geyser You will replace/add to the one their and then copy over the .cargo/config.toml ...

Add?

coral geyser Jul 28, 2022, 11:40 PM

#

Well you could keep the [project] header and just add the rest of it

wary cloak Jul 28, 2022, 11:40 PM

#

I wouldn't be understanding what to do

#

First

#

I'll go to the toml file in the other

#

Which had

#

This

#

And past it to the new project toml

coral geyser Jul 28, 2022, 11:42 PM

#

coral geyser Well you could keep the [project] header and just add the rest of it

Sorry I meant [package]

wary cloak Jul 28, 2022, 11:42 PM

#

#

I did that just know

#

Now*

#

Ofc I'll change the name

#

Thing is what's next now

coral geyser Jul 28, 2022, 11:43 PM

#

The .cargo/config.toml

wary cloak Jul 28, 2022, 11:43 PM

#

Where do I add the other toml file?

#

The one that was really short

coral geyser Jul 28, 2022, 11:45 PM

#

coral geyser The .cargo/config.toml

^ same spot

wary cloak Jul 28, 2022, 11:45 PM

#

Well I need to go I have copied it for next time

#

#

I left it there for now

wary cloak Jul 28, 2022, 11:46 PM

#

coral geyser ^ same spot

So I create a new cargo.toml in there scr directory and paste that?

#

Because I don't remember where it was

#

Well you were right thing ended up being really complicated but well

#

I hope next time we can create a copy of another project to have the set up done

#

Actually how many other stuff I need to copy from the other file -

#

Isn't there a way to just copy all directories that are in vs code to the other new vs code project?

coral geyser Jul 28, 2022, 11:55 PM

#

wary cloak Isn't there a way to just copy all directories that are in vs code to the other ...

Right click directory, copy, right click other vs code paste ferrisPlead

wary cloak Jul 28, 2022, 11:58 PM

#

..

#

Why didn't we do that to begin with(?

coral geyser Jul 28, 2022, 11:58 PM

#

coral geyser Or copy the avr-hal-template-main to a new folder so you don't have to set it al...

^ ferrisPlead

wary cloak Jul 28, 2022, 11:58 PM

#

Which folders do I need to copy?

wary cloak Jul 28, 2022, 11:59 PM

#

coral geyser ^ <:ferrisPlead:857440845891895336>

I didn't understood-

#

Well tell which of all the folders I need to copy so when I come back even tho you'll probably be asleep I can set it all up for next time

#

Tho..

coral geyser Jul 29, 2022, 12:00 AM

#

wary cloak Which folders do I need to copy?

The .cargo/ one and the one with the json files in it forgot the name

wary cloak Jul 29, 2022, 12:00 AM

#

For example the mini toml file had it's own.. Scope?

#

It was inside a cargo folder

wary cloak Jul 29, 2022, 12:01 AM

#

coral geyser The .cargo/ one and the one with the json files in it forgot the name

Ok, it doesn't matter where?

#

Because seems like folder had a scope too or smth

#

Folders*

coral geyser Jul 29, 2022, 12:02 AM

#

wary cloak Ok, it doesn't matter where?

You just need to make this new folder look like the original, except for the target folder (cargo will make that one)

wary cloak Jul 29, 2022, 12:02 AM

#

Ok I'mma try make it similar and when I'm done I'll send a picture

#

Now that you've seen what I want to re-write (well at least more than half of it) how hard do you think it would be to get it done?

coral geyser Jul 29, 2022, 12:04 AM

#

wary cloak Now that you've seen what I want to re-write (well at least more than half of it...

I am unsure, but I think it's doable

wary cloak Jul 29, 2022, 12:04 AM

#

How long do you think it could take?

wary cloak Jul 29, 2022, 12:04 AM

#

coral geyser I am unsure, but I think it's doable

I guess it's reduced to whether everything has libraries or if some things doesn't

coral geyser Jul 29, 2022, 12:05 AM

#

wary cloak How long do you think it could take?

Depends entirely on you, very hard to judge

wary cloak Jul 29, 2022, 12:05 AM

#

Well as I said the first version the code I sent you prior took less that a week but

#

Maybe in rust it's harder? Or maybe some component doesn't have a library

#

What I would be hoping it's to do it for next weekend maybe but idk how is it

#

Next Wednesday if possible but maybe that's too little time

coral geyser Jul 29, 2022, 12:07 AM

#

wary cloak Maybe in rust it's harder? Or maybe some component doesn't have a library

Not having a library is somewhat likely just because it's not as big of an ecosystem as Arduino

wary cloak Jul 29, 2022, 12:07 AM

#

I'm willing to spend a lot of time on this myself

wary cloak Jul 29, 2022, 12:08 AM

#

coral geyser Not having a library is somewhat likely just because it's not as big of an ecosy...

Yeah that worries me a little bit but it's also a bit exciting also, to learn that and so

wary cloak Jul 29, 2022, 12:08 AM

#

wary cloak I'm willing to spend a lot of time on this myself

But I don't like dragging other people down(?

coral geyser Jul 29, 2022, 12:09 AM

#

My recommendation, done rely on it getting done in time

wary cloak Jul 29, 2022, 5:09 AM

#

coral geyser My recommendation, done rely on it getting done in time

I didn't understand

wary cloak Jul 29, 2022, 8:51 AM

#

Ah you wanted to say don't so, O should expect it to get done in that time?

#

Well I mean I guess I have more time that situations would merely be ideal

wary cloak Jul 29, 2022, 5:03 PM

#

Ok I am able to continue now, since I have only 3 days left of holidays I will dedicate all time posible in this three days to give it a huge boost

#

Because after that it will be harder to dedicate it so much time

wary cloak Jul 29, 2022, 8:17 PM

#

I had a random idea

#

I guess the answer's no but

#

Is there any scenario where you could you use multi threaded programming in embedded systems?

#

And I also wonder how much will it cost to do it in terms of memory

#

And I would ask the same for asynchronous programming but I have yet to research what's that

#

@dreamy trellis I just realized you are also here, interested in arduino rust programming?

dreamy trellis Jul 29, 2022, 8:41 PM

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not really

#

i just joined this thread a while ago

#

and never left

wary cloak Jul 29, 2022, 8:43 PM

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Oh

dreamy trellis Jul 29, 2022, 8:44 PM

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i dont have an arduino

#

cant do much without one

wary cloak Jul 29, 2022, 8:45 PM

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Well if there was something you wanted to do with it you could buy one or the cheaper imitation ones since it's open source

dreamy trellis Jul 29, 2022, 8:46 PM

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sure

wary cloak Jul 29, 2022, 8:48 PM

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I recommend it, it's fun

#

Seeing your results irl

#

I heard people consider embedded programming the easiest.. Idk why but maybe just maybe they coould be right I'm not sure because I haven't done much else

dreamy trellis Jul 29, 2022, 8:49 PM

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i dont think thats quite true

wary cloak Jul 29, 2022, 8:50 PM

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Me neither

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What's harder is the fact that you need to buy stuff, which could often be expensive

#

And it doesn't depend only on your code

#

If you want to do an actual thing you need to work with other stuff like PCBs, maybe wood, etc

wary cloak Jul 29, 2022, 10:08 PM

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@coral geyser are you available?

wary cloak Jul 29, 2022, 10:56 PM

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I've finally done the setup imma send the pictures to confirm if it's ok

#

#

The main function, both cargo toml files, the toolchain and the specs full of JSON

wary cloak Jul 29, 2022, 11:02 PM

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wary cloak ``` lcd = "0.4.1" ``` in the principal toml file in the dependency section

Well actually I forgot to this so I'll go do that

wary cloak Jul 30, 2022, 4:07 AM

#

wary cloak ``` lcd = "0.4.1" ``` in the principal toml file in the dependency section

I just realized there are two dependencies sections. .

#

I'll put it in the normal dependencies and leave dependencies arduino hal alone

#

Tho I have an error I think by changing the name in the toml file in the package section from test to rust_lcd tho if it isn't that then no clue

#

coral geyser Jul 30, 2022, 4:13 AM

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wary cloak

you can run cargo check to get a better error message

wary cloak Jul 30, 2022, 4:14 AM

#

#

It suddenly decided to be full of errors why does it do this to me-

#

Just for reference I changed the name back to test to make sure

#

error: Ensure that you are using an AVR target! You may need to change directories or pass a --target flag to cargo. See
https://github.com/Rahix/avr-device/pull/41 for more details.
--> src\main.rs:6:1
|
6 | #[arduino_hal::entry]
| ^^^^^^^^^^^^^^^^^^^^^
|
= note: this error originates in the attribute macro arduino_hal::entry (in Nightly builds, run with -Z macro-backtrace for more info)

error: could not compile test due to previous error

GitHub

Error if the wrong architecture is being used by lights0123 · Pull ...

There have been a couple times where an incorrectly set target file has caused errors that don't immediately point to the problem. Instead, we should show an error immediately telling the user ...

coral geyser Jul 30, 2022, 4:18 AM

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wary cloak

do you have the .cargo/config.toml and the json file that defines the target?

wary cloak Jul 30, 2022, 4:19 AM

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Yes as shown in the pictures above, I could send them again if it's more comfortable to you

coral geyser Jul 30, 2022, 4:19 AM

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wary cloak Yes as shown in the pictures above, I could send them again if it's more comfort...

the config.toml is in the wrong folder

wary cloak Jul 30, 2022, 4:19 AM

#

Just because I don't trust myself with this I sent the photos of what I copied and where because maybe juusst maybe I have what I need but in the wrong place

wary cloak Jul 30, 2022, 4:20 AM

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coral geyser the config.toml is in the wrong folder

Where do I place it?

coral geyser Jul 30, 2022, 4:20 AM

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wary cloak Where do I place it?

in a folder named ".cargo"

wary cloak Jul 30, 2022, 4:20 AM

#

folder inside src or just there?

coral geyser Jul 30, 2022, 4:21 AM

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wary cloak folder inside src or just there?

in the same folder that src is in, but not in src

wary cloak Jul 30, 2022, 4:21 AM

#

#

There?

coral geyser Jul 30, 2022, 4:21 AM

#

project
|- .cargo/
|   |- config.toml
|- src/
    |- main.rs

coral geyser Jul 30, 2022, 4:21 AM

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wary cloak There?

yep

wary cloak Jul 30, 2022, 4:22 AM

#

Tho the error remains there

coral geyser Jul 30, 2022, 4:22 AM

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wary cloak Tho the error remains there

run cargo check

wary cloak Jul 30, 2022, 4:22 AM

#

Btw is there everything I need there and in the right place or I have something else in the wrong place like maybe the specs and so

coral geyser Jul 30, 2022, 4:22 AM

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wary cloak Btw is there everything I need there and in the right place or I have something ...

it looks right

wary cloak Jul 30, 2022, 4:23 AM

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The fact that it failed before wasn't because of me changing the name of test in package but this?

coral geyser Jul 30, 2022, 4:23 AM

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wary cloak The fact that it failed before wasn't because of me changing the name of test in...

Yep

wary cloak Jul 30, 2022, 4:23 AM

#

Ok then if it checks I'll change it again

coral geyser Jul 30, 2022, 4:23 AM

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wary cloak Tho the error remains there

do a ctrl + p and then "reload window"

wary cloak Jul 30, 2022, 4:23 AM

#

Btw the lcd dependencie..

coral geyser Jul 30, 2022, 4:23 AM

#

that should reset rust-analyzer

wary cloak Jul 30, 2022, 4:23 AM

#

Dependenci*

#

Dependency*

#

Where like.. In the dependency section or the arduino hal dependency section

coral geyser Jul 30, 2022, 4:24 AM

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wary cloak Where like.. In the dependency section or the arduino hal dependency section

just the normal dependency section

wary cloak Jul 30, 2022, 4:24 AM

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It do be taking it's time to check

#

This like hitting compile instead of upload, right?

wary cloak Jul 30, 2022, 4:25 AM

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wary cloak It do be taking it's time to check

I guess it's building everything maybe

#

It finished it compiled

#

Tho ctrl p doesn't work and the error it's still there

#

i changed the name again and cargo check said this

#

error: failed to parse manifest at C:\Users\fuchi\OneDrive\Documentos\Codigos_Rust\rust_lcd\Cargo.toml

Caused by:
can't find test bin at src\bin\test.rs or src\bin\test\main.rs. Please specify bin.path if you want to use a non-default path.

coral geyser Jul 30, 2022, 4:28 AM

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wary cloak Tho ctrl p doesn't work and the error it's still there

sorry it's Ctrl+Shift+P

wary cloak Jul 30, 2022, 4:28 AM

#

coral geyser Jul 30, 2022, 4:28 AM

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wary cloak error: failed to parse manifest at `C:\Users\fuchi\OneDrive\Documentos\Codigos_R...

Oh you changed the binary name in the config

wary cloak Jul 30, 2022, 4:29 AM

#

Ah

#

I had to change bin to?

#

No, seems it's not it, it failed again

#

Or maybe it's taking it's time to accept it?

#

I'll run ctrl shift p as you said

#

And then cargo check

coral geyser Jul 30, 2022, 4:31 AM

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wary cloak No, seems it's not it, it failed again

The package name and binary name don't match now

wary cloak Jul 30, 2022, 4:31 AM

#

So I should leave at test? Shouldn't we give it a proper name?

coral geyser Jul 30, 2022, 4:31 AM

#

you can add path = "src/main.rs" to the [[bin]] section to manually set the file for it

coral geyser Jul 30, 2022, 4:32 AM

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wary cloak So I should leave at test? Shouldn't we give it a proper name?

you can also just set name = "rust_lcd" in the [[bin]] section

wary cloak Jul 30, 2022, 4:32 AM

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I did

#

Well seems the reload solve it

#

Ok so I guess finally it's all setup

#

I hope now I just copy from here knowing what and how and there's no more 30 minute setuping for actually doing something

#

How do we start?

#

OH COME ON

#

The same error appeared again

#

And it went away

#

Wtf goes on with rust analyzer

coral geyser Jul 30, 2022, 4:34 AM

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wary cloak Wtf goes on with rust analyzer

RA has issues when you change targets

#

It gets confused sometimes

wary cloak Jul 30, 2022, 4:35 AM

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I'll suppose it's finally fine so, how we start, the use keyboard to bring something into scope, the dp and pins stuff?

coral geyser Jul 30, 2022, 4:35 AM

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you are going to get the lcd working right?

wary cloak Jul 30, 2022, 4:36 AM

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Yeah

#

We, I can't take the credit(?

coral geyser Jul 30, 2022, 4:36 AM

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first probably make sure this compiles and uploads to the board and blinks the LED

wary cloak Jul 30, 2022, 4:36 AM

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Oh sure

coral geyser Jul 30, 2022, 4:37 AM

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I have found the best way to do development is to be as close to a known working setup as possible so if something breaks you only have to check what you just changed

wary cloak Jul 30, 2022, 4:38 AM

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What do you mean a working setup?

coral geyser Jul 30, 2022, 4:38 AM

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wary cloak What do you mean a working setup?

Like no errors

wary cloak Jul 30, 2022, 4:39 AM

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It's already blinking (I hit reset before when I realized it was blinking without me writting Cargo run)

#

But

#

It said finished running and all but again said the thing about the serial port

#

Which is weird because

#

It's blinking anyways

coral geyser Jul 30, 2022, 4:40 AM

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wary cloak It's already blinking (I hit reset before when I realized it was blinking withou...

remember it will start running whatever you last had on it when you plug it in

wary cloak Jul 30, 2022, 4:40 AM

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Ik that's why I hit reset before running cargo run

coral geyser Jul 30, 2022, 4:40 AM

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wary cloak Ik that's why I hit reset before running cargo run

reset doesn't remove the program

wary cloak Jul 30, 2022, 4:40 AM

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Ah

coral geyser Jul 30, 2022, 4:40 AM

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It just restarts it

wary cloak Jul 30, 2022, 4:40 AM

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I see I was wrong

#

Then how can we check?

#

That it works

coral geyser Jul 30, 2022, 4:41 AM

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wary cloak Then how can we check?

You should find the port it's connected to again

#

I think it was COM6 last time ?

wary cloak Jul 30, 2022, 4:41 AM

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But it will blink even if it works or not

#

Like just know

coral geyser Jul 30, 2022, 4:41 AM

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wary cloak But it will blink even if it works or not

When you program it the lights will flash rapidly and the cargo run command will land in the serial monitor

wary cloak Jul 30, 2022, 4:42 AM

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Here

coral geyser Jul 30, 2022, 4:42 AM

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wary cloak Here

yep, usually windows will keep the same port, but sometimes it changes

wary cloak Jul 30, 2022, 4:43 AM

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Yeah I saw an extra light flash rapidly and so

#

So yeah it works

#

So there's no way to erase a program but just override it?

coral geyser Jul 30, 2022, 4:44 AM

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wary cloak So there's no way to erase a program but just override it?

The microcontroller will always be running something you could have a empty program loop {} that you put on it when you don't want it to do stuff

wary cloak Jul 30, 2022, 4:44 AM

#

Oh

#

I see

#

So now that's all setup, what's the first step?

coral geyser Jul 30, 2022, 4:45 AM

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wary cloak So yeah it works

I think a good next step is to make a src/lcd.rs file to hold your LCD code

wary cloak Jul 30, 2022, 4:45 AM

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Next time at least I can get all this setup myself hopefully

wary cloak Jul 30, 2022, 4:45 AM

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coral geyser I think a good next step is to make a `src/lcd.rs` file to hold your LCD code

Won't we code in main.rs?

coral geyser Jul 30, 2022, 4:46 AM

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wary cloak Won't we code in main.rs?

It's good to work in modules so your code doesn't get to messy

wary cloak Jul 30, 2022, 4:46 AM

#

We aren't using main or we are using it later?

#

Lcd it's gonna be our library crate or another binary crate?

coral geyser Jul 30, 2022, 4:46 AM

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wary cloak We aren't using main or we are using it later?

It where be where you do stuff, but we need to setup some stuff first

wary cloak Jul 30, 2022, 4:47 AM

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So like extracting the logic from main and just calling the public api?

coral geyser Jul 30, 2022, 4:47 AM

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wary cloak Lcd it's gonna be our library crate or another binary crate?

remember how we need to connect the lcd library up to the i2c communication? also you wanted to copy some of your custom lcd management code

coral geyser Jul 30, 2022, 4:48 AM

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wary cloak Lcd it's gonna be our library crate or another binary crate?

It will just be a module mod lcd; (in main.rs)

wary cloak Jul 30, 2022, 4:48 AM

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Ok created

#

coral geyser Jul 30, 2022, 4:48 AM

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okay we will use https://github.com/wfraser/lcd-pcf8574/blob/master/src/lib.rs as a template

wary cloak Jul 30, 2022, 4:49 AM

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What's a template?

coral geyser Jul 30, 2022, 4:49 AM

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so just copy over the code from it

coral geyser Jul 30, 2022, 4:49 AM

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wary cloak What's a template?

We will follow the same structure as the code above, but make it specific for the Arduino Mega

wary cloak Jul 30, 2022, 4:50 AM

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Oh I thought we were doing all from scratch

#

I copy all 96 lines?

coral geyser Jul 30, 2022, 4:50 AM

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wary cloak Oh I thought we were doing all from scratch

This should be easier

#

It will end up being mostly from scratch

coral geyser Jul 30, 2022, 4:50 AM

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wary cloak I copy all 96 lines?

yep

#

Its not going to work

wary cloak Jul 30, 2022, 4:51 AM

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Done

coral geyser Jul 30, 2022, 4:51 AM

#

alright, did you add a mod lcd; at the top of main.rs?

wary cloak Jul 30, 2022, 4:51 AM

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No, I will

coral geyser Jul 30, 2022, 4:51 AM

#

once you do that you should get a nice wall of red in the lcd.rs file

wary cloak Jul 30, 2022, 4:51 AM

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use mod lcd?

#

Below no main line

coral geyser Jul 30, 2022, 4:52 AM

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wary cloak Below no main line

yep

wary cloak Jul 30, 2022, 4:52 AM

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coral geyser once you do that you should get a nice wall of red in the lcd.rs file

I got it in main for some reason

#

coral geyser Jul 30, 2022, 4:53 AM

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wary cloak

oh it's just ```rust
mod lcd;

wary cloak Jul 30, 2022, 4:53 AM

#

Done

#

Ok it appeared

coral geyser Jul 30, 2022, 4:53 AM

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coral geyser oh it's just ```rust mod lcd; ```

this defines the lcd.rs file do be a module

#

We don't need the #!... lines at the top on lcd.rs

#

so remove those

wary cloak Jul 30, 2022, 4:54 AM

#

coral geyser Jul 30, 2022, 4:54 AM

#

and we don't need any of the use lines except for use lcd::{Delay, Hardware};

#

we can't use the std ones because ... we don't have std ferrisBut

wary cloak Jul 30, 2022, 4:55 AM

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I wonder why are they there

#

Ok done

#

coral geyser Jul 30, 2022, 4:56 AM

#

wary cloak

we need the

use lcd::{Delay, Hardware};

one, we also don't have i2cdev as this isn't running linux

wary cloak Jul 30, 2022, 4:56 AM

#

coral geyser and we don't need any of the use lines except for `use lcd::{Delay, Hardware};`

Bruh I thought you said

#

We don't need that one

coral geyser Jul 30, 2022, 4:57 AM

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wary cloak Bruh I thought you said

" except for " ferrisHmm

wary cloak Jul 30, 2022, 4:57 AM

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Ok done

coral geyser Jul 30, 2022, 4:57 AM

#

Did the double negative mess you up?

wary cloak Jul 30, 2022, 4:57 AM

#

wary cloak Jul 30, 2022, 4:57 AM

#

coral geyser Did the double negative mess you up?

I may be just a little asleep

coral geyser Jul 30, 2022, 4:58 AM

#

So now we need to find what "LinuxI2CDevice" needs to be replaced with

wary cloak Jul 30, 2022, 4:58 AM

#

So basically as with the toml we are getting rid of everything not arduino mega specific first, aren't we?

coral geyser Jul 30, 2022, 4:58 AM

#

in a terminal in vs code run cargo doc --open

coral geyser Jul 30, 2022, 4:58 AM

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wary cloak So basically as with the toml we are getting rid of everything not arduino mega ...

yep

wary cloak Jul 30, 2022, 4:59 AM

#

It's building stuff

coral geyser Jul 30, 2022, 5:00 AM

#

you should get this in a web browser

wary cloak Jul 30, 2022, 5:00 AM

#

Eventually

coral geyser Jul 30, 2022, 5:01 AM

#

This will be the docs for all the dependencies of your project. Which you need because it will be specific for the Arduino Mega as we configured it to be

wary cloak Jul 30, 2022, 5:01 AM

#

Btw what would be the code we copied? The actual library or smth?

coral geyser Jul 30, 2022, 5:02 AM

#

wary cloak Btw what would be the code we copied? The actual library or smth?

Its an adapter between the lcd library and the linux i2c device

wary cloak Jul 30, 2022, 5:02 AM

#

Wait now that I think about it this code is for the I2C

#

Oh I see

coral geyser Jul 30, 2022, 5:03 AM

#

wary cloak Wait now that I think about it this code is for the I2C

The lcd library expects you to have the lcd connected with 6 wires not i2c. So we just need to adapt it

wary cloak Jul 30, 2022, 5:03 AM

#

So first we have the LCD library for normal lcd but we can't just work with that so me use a code that will help us with the I2C

#

It had errors and it didn't open anything-

#

error: cannot find macro `format` in this scope
  --> src\lcd.rs:32:38
   |
32 |             dev: LinuxI2CDevice::new(format!("/dev/i2c-{}", bus), address)?,
   |                                      ^^^^^^

error[E0412]: cannot find type `LinuxI2CDevice` in this scope
 --> src\lcd.rs:7:10
  |
7 |     dev: LinuxI2CDevice,
  |          ^^^^^^^^^^^^^^ not found in this scope

error[E0412]: cannot find type `Box` in this scope
  --> src\lcd.rs:21:12
   |
21 |     Custom(Box<dyn FnMut(LinuxI2CError) + 'static>),
   |            ^^^ not found in this scope

error[E0412]: cannot find type `LinuxI2CError` in this scope
  --> src\lcd.rs:21:26
   |
13 | pub enum ErrorHandling {
   |                       - help: you might be missing a type parameter: `<LinuxI2CError>`
...
21 |     Custom(Box<dyn FnMut(LinuxI2CError) + 'static>),
   |                          ^^^^^^^^^^^^^ not found in this scope

error[E0412]: cannot find type `LinuxI2CError` in this scope
  --> src\lcd.rs:30:55
   |
24 | impl Pcf8574 {
   |     - help: you might be missing a type parameter: `<LinuxI2CError>`
...
30 |     pub fn new(bus: u8, address: u16) -> Result<Self, LinuxI2CError> {
   |                                                       ^^^^^^^^^^^^^ not found in this scope

error: Compilation failed, aborting rustdoc

For more information about this error, try `rustc --explain E0412`.
error: could not document `rust_lcd`

coral geyser Jul 30, 2022, 5:04 AM

#

wary cloak It had errors and it didn't open anything-

~~oh, add --keep-going~~

wary cloak Jul 30, 2022, 5:04 AM

#

And then a really long text

coral geyser Jul 30, 2022, 5:04 AM

#

By default it won't let you if there are compilation errors with the code

coral geyser Jul 30, 2022, 5:05 AM

#

coral geyser ~~oh, add `--keep-going`~~

actually just comment the mod lcd; in main.rs run the command then uncomment it

#

I should have had you open this first

wary cloak Jul 30, 2022, 5:05 AM

#

Oh ok I was just typing the other stuff

#

cargo doc --open --keep-going

#

It opened

#

With the comment solution

#

Ok finally

#

Arduino hal then?

coral geyser Jul 30, 2022, 5:07 AM

#

yep

#

then search i2c

wary cloak Jul 30, 2022, 5:07 AM

#

coral geyser Jul 30, 2022, 5:08 AM

#

wary cloak

go to the i2c bus controller

wary cloak Jul 30, 2022, 5:08 AM

#

coral geyser Jul 30, 2022, 5:09 AM

#

wary cloak

The one we want is the bottom Type definition one (they are both the same)

wary cloak Jul 30, 2022, 5:09 AM

#

Then why is it two of them? A mistake?

coral geyser Jul 30, 2022, 5:10 AM

#

wary cloak Then why is it two of them? A mistake?

I think their docs config is slightly messed up. Some devices have multiple i2c so it's probably for that

wary cloak Jul 30, 2022, 5:10 AM

#

#

What's that beast

#

Ah type was for

coral geyser Jul 30, 2022, 5:10 AM

#

wary cloak

Now click the I2c in that line

wary cloak Jul 30, 2022, 5:10 AM

#

Alias wasn't it?

coral geyser Jul 30, 2022, 5:11 AM

#

wary cloak Alias wasn't it?

yep the mega i2c is a special case of the I2c struct

wary cloak Jul 30, 2022, 5:11 AM

#

coral geyser Jul 30, 2022, 5:11 AM

#

As you can see this looks like what we want right

#

So now going back to the lcd.rs file

wary cloak Jul 30, 2022, 5:12 AM

#

Honestly

#

I get half of what we are doing rn

#

So we were looking for

#

The definition of the variable (or special instance of the I2C struct) that has all the I2C protocol information and for our specific microcontroller instead of using a whole other struct or stuff bigger than this?

coral geyser Jul 30, 2022, 5:14 AM

#

yep, we need something to replace LinuxI2CDevice

wary cloak Jul 30, 2022, 5:14 AM

#

Tho this one says for arduino uno

coral geyser Jul 30, 2022, 5:14 AM

#

wary cloak Tho this one says for arduino uno

yeah thats what the example shows

coral geyser Jul 30, 2022, 5:15 AM

#

wary cloak

in the lcd.rs file we can replace LinuxI2CDevice with arduino_hal::I2c in the struct definition

wary cloak Jul 30, 2022, 5:16 AM

#

So basically this example code you found is on how someone used the I2C protocol with the library we are interested in but it was with Linux so we are replacing all the unnecessary stuff and changing all Linux to mega

coral geyser Jul 30, 2022, 5:16 AM

#

wary cloak So basically this example code you found is on how someone used the I2C protocol...

exactly

#

super common in software development to find close to but not exactly what you need

wary cloak Jul 30, 2022, 5:17 AM

#

Tho I guess this is another library or something because it has documentation and stuff but the base case is Linux ig tho it supports other stuff for you to change it

#

Ok now I think I more or less get what we are doing

#

coral geyser Jul 30, 2022, 5:18 AM

#

coral geyser in the lcd.rs file we can replace `LinuxI2CDevice` with `arduino_hal::I2c` in th...

You can also change the name of the struct Pcf8574 to something you prefer

coral geyser Jul 30, 2022, 5:18 AM

#

wary cloak

yep

wary cloak Jul 30, 2022, 5:18 AM

#

I guess Lcd with a capital L, what do you think?

coral geyser Jul 30, 2022, 5:18 AM

#

wary cloak I guess Lcd with a capital L, what do you think?

sounds good

wary cloak Jul 30, 2022, 5:18 AM

#

It depends on what this struct represents

#

And what I'm gonna do with it

coral geyser Jul 30, 2022, 5:19 AM

#

You can also update the doc comments (///) as we go so you remember stuff later

coral geyser Jul 30, 2022, 5:19 AM

#

wary cloak It depends on what this struct represents

It will represent the connection to the Lcd

wary cloak Jul 30, 2022, 5:19 AM

#

Ok so it's ok

#

So the comment above this struct originally is

#

/// Represents an LCD display attached via PCF8574 I2C expander. Use the traits in the [lcd]
/// crate to interact with it.

#

So I guess I would write

coral geyser Jul 30, 2022, 5:20 AM

#

coral geyser It will represent the connection to the Lcd

I just remembered that you will probably have a higher level struct that will be your custom LCD methods specific to the project

wary cloak Jul 30, 2022, 5:20 AM

#

///This struct represents the LCD Microcomponent connections

#

I don't have anything else to say

wary cloak Jul 30, 2022, 5:21 AM

#

coral geyser I just remembered that you will probably have a higher level struct that will be...

Mmm

coral geyser Jul 30, 2022, 5:21 AM

#

wary cloak

also, because we have basically direct control over the i2c hardware we don't need to worry about what to do if an error happens

#

So we don't need the on_err field of the struct or the ErrorHandling struct

coral geyser Jul 30, 2022, 5:22 AM

#

wary cloak Mmm

The stuff your arduino code does

wary cloak Jul 30, 2022, 5:23 AM

#

So I deleted the error handling enum and on_err field

#

Using underscores and that on struct names feels a bit ugly but

#

You could use

coral geyser Jul 30, 2022, 5:23 AM

#

k now we get to

pub fn new(bus: u8, address: u16) -> Result<Self, LinuxI2CError> {
    Ok(Self {
        dev: LinuxI2CDevice::new(format!("/dev/i2c-{}", bus), address)?,
        data: 0b0000_1000, // backlight on by default
        on_err: ErrorHandling::None,
    })
}

wary cloak Jul 30, 2022, 5:23 AM

#

lcd_wires

coral geyser Jul 30, 2022, 5:23 AM

#

wary cloak lcd_wires

LcdConnection ?

wary cloak Jul 30, 2022, 5:24 AM

#

Sure

coral geyser Jul 30, 2022, 5:24 AM

#

or the proper term in spanish

wary cloak Jul 30, 2022, 5:24 AM

#

The doc comments are in Spanish but struct names I do them in English

#

Ok we get to the new function yeah

#

Oh

coral geyser Jul 30, 2022, 5:25 AM

#

coral geyser k now we get to ```rust pub fn new(bus: u8, address: u16) -> Result<Self, Linux...

So now for this we don't have a bus or address, we will get the arduino_hal::I2c struct by doing

let mut i2c = arduino_hal::I2c::new(
    dp.TWI,
    pins.a4.into_pull_up_input(),
    pins.a5.into_pull_up_input(),
    50000,
);

(well close to)

wary cloak Jul 30, 2022, 5:25 AM

#

I should change the name of the impl block

coral geyser Jul 30, 2022, 5:26 AM

#

coral geyser k now we get to ```rust pub fn new(bus: u8, address: u16) -> Result<Self, Linux...

So I think ```rust
pub fn new(dev: arduino_hal::I2c) -> Self {
Self {
dev,
data: 0b0000_1000, // backlight on by default
}
}

should be good

wary cloak Jul 30, 2022, 5:26 AM

#

Ok I'll copy that from here in it's place

#

But why wouke be the bus or adress and why won't we need it?

coral geyser Jul 30, 2022, 5:27 AM

#

coral geyser So I think ```rust pub fn new(dev: arduino_hal::I2c) -> Self { Self { ...

The 0b0000_1000 magic number is probably defined in the datasheet for that board on the back of the lcd

coral geyser Jul 30, 2022, 5:27 AM

#

coral geyser So now for this we don't have a bus or address, we will get the arduino_hal::I2c...

Because we will just do this ^

#

We have direct access to the hardware

wary cloak Jul 30, 2022, 5:28 AM

#

And this library suppose we doesn't?

coral geyser Jul 30, 2022, 5:28 AM

#

wary cloak And this library suppose we doesn't?

yep, on linux the OS may prevent you from connecting to the I2c bus

wary cloak Jul 30, 2022, 5:28 AM

#

Ok time to change the doc comment

#

Oh so this is just because of Linux stuff ok I guess knowing that it's enough then

#

ok original comments

#

/// Create a new instance, using the Linux I2C interface for communication. bus is the number
/// of /dev/i2c-<bus> to use, and address is the I2C address of the device.
///
/// After opening the device, defaults to ignoring all I/O errors; see [Self::on_error] and
/// [ErrorHandling] for how to change this behavior.

#

I guess it would just be

coral geyser Jul 30, 2022, 5:29 AM

#

wary cloak Oh so this is just because of Linux stuff ok I guess knowing that it's enough th...

(I thought doing it this way would help the learning experience. instead of just giving all the answers ferrisWink )

wary cloak Jul 30, 2022, 5:30 AM

#

///Creates a new instance of the LcdConnection Struct by receiving the Struct as a parameter and setting data sheet data for the backlight to be on

coral geyser Jul 30, 2022, 5:30 AM

#

okay, quiz time. What do we do with on_error?

wary cloak Jul 30, 2022, 5:31 AM

#

Let me change the comments and I'll try to answer

#

Too long I should've done more comments

#

Ok let's see

#

Well since we got rid of the on error field and the error handling enum and you said we won't needed and it seems because it's of our hardware control I guess we get rid of the public function on_error

coral geyser Jul 30, 2022, 5:35 AM

#

wary cloak Well since we got rid of the on error field and the error handling enum and you ...

yep, we don't need it ferristhumbsup

#

what about backlight?

wary cloak Jul 30, 2022, 5:36 AM

#

Well I wouldn't want to turn off the backlight I don't need tho just for having the functionality I would maybe leave it, but it's not necessary

coral geyser Jul 30, 2022, 5:36 AM

#

wary cloak Well I wouldn't want to turn off the backlight I don't need tho just for having ...

then lets leave it

wary cloak Jul 30, 2022, 5:36 AM

#

(Not only I don't need to, it's turn on by default is useless)

#

Yeah you are right let's delet it

#

If I never needed I can find it again

#

Ever*

coral geyser Jul 30, 2022, 5:37 AM

#

set_bit we need, but you could add a comment

wary cloak Jul 30, 2022, 5:37 AM

#

Set bit writes a letter/char or what does it do?

#

(We later go over on how it does , for now I guess I just need what it does)

coral geyser Jul 30, 2022, 5:38 AM

#

wary cloak Set bit writes a letter/char or what does it do?

It looks like the i2c board on the back of the screen has 8 bits where each bit activates one of the wires

#

The lcd library knows how to set all the wires to control it, but we also need to do the extra wires

wary cloak Jul 30, 2022, 5:38 AM

#

Extra wires?

#

And also 8 bits? Are we counting Vcc and GND?

coral geyser Jul 30, 2022, 5:39 AM

#

normally this LCD uses 4 wires for data and 2 for reset and enable

coral geyser Jul 30, 2022, 5:39 AM

#

wary cloak And also 8 bits? Are we counting Vcc and GND?

It probably has 8 bits because it's a nice number of them to work with

wary cloak Jul 30, 2022, 5:39 AM

#

Data being the characters, ig, reset like a clear but what would be enable? Turn on and off?

wary cloak Jul 30, 2022, 5:40 AM

#

coral geyser It probably has 8 bits because it's a nice number of them to work with

Oh yeah just like some integrated circuits may have 6 or 8 legs but like two of them do nothing

coral geyser Jul 30, 2022, 5:40 AM

#

wary cloak Oh yeah just like some integrated circuits may have 6 or 8 legs but like two of ...

yep

coral geyser Jul 30, 2022, 5:41 AM

#

wary cloak Data being the characters, ig, reset like a clear but what would be enable? Turn...

I am not sure exactly what they do, https://cdn-shop.adafruit.com/datasheets/TC2004A-01.pdf explains it all though if you want to look

wary cloak Jul 30, 2022, 5:41 AM

#

If you that knows lot more of embedded than me doesn't know I guess I really doesn't need to know (?

#

So..

#

Let's see I could comment

coral geyser Jul 30, 2022, 5:42 AM

#

coral geyser I am not sure exactly what they do, https://cdn-shop.adafruit.com/datasheets/TC2...

This is the timing diagram for the communication

#

looks like enable is to enable data transfer

wary cloak Jul 30, 2022, 5:42 AM

#

///Function that sets the bits of the I2C circuit which are used to control the LCD wires

#

Ok done

coral geyser Jul 30, 2022, 5:44 AM

#

impl Hardware for Pcf8574 {
    fn rs(&mut self, bit: bool) {
        self.set_bit(0, bit);
    }

    fn enable(&mut self, bit: bool) {
        self.set_bit(2, bit);
    }

    fn data(&mut self, bits: u8) {
        assert!(bits & 0xF0 == 0, "4-bit mode is required");
        self.data = (self.data & 0x0F) | (bits << 4);
    }

    fn apply(&mut self) {
        if let Err(e) = self.dev.smbus_write_byte(self.data) {
            match &mut self.on_err {
                ErrorHandling::None => (),
                ErrorHandling::Panic => panic!("smbus_write_byte failed: {}", e),
                ErrorHandling::Custom(f) => f(e),
            }
        }
    }
}

You need to change the struct name, and we need to change apply

wary cloak Jul 30, 2022, 5:44 AM

#

Change meaning delete?

coral geyser Jul 30, 2022, 5:45 AM

#

wary cloak Change meaning delete?

no, we still need it but we need to find how the arduino_hal::I2c one does it's write

wary cloak Jul 30, 2022, 5:45 AM

#

And I should change the text to Spanish also

wary cloak Jul 30, 2022, 5:45 AM

#

coral geyser no, we still need it but we need to find how the arduino_hal::I2c one does it's ...

So we go back to the documentation?

wary cloak Jul 30, 2022, 5:46 AM

#

wary cloak And I should change the text to Spanish also

Sometimes I wish I was English (?

#

I would be.. Blondier(?

#

Thing is I am blonde but I was way more and I hate that fact(?

#

There's just one other text to change but I don't understand it

coral geyser Jul 30, 2022, 5:47 AM

#

wary cloak So we go back to the documentation?

yep, did you find anything that may be what we want yet?

wary cloak Jul 30, 2022, 5:47 AM

#

panic!("smbus_write_byte failed: {}", e)

#

What's smbys_write_byte

#

A function?

#

Because I don't see it

coral geyser Jul 30, 2022, 5:48 AM

#

wary cloak A function?

is from that Linux I2c thing self.dev.smbus_write_byte(self.data)

wary cloak Jul 30, 2022, 5:48 AM

#

Oh I see it..

#

Oh

#

So let's first change that function let's see

#

Btw we are near to finishing changing stuff

#

Last time we where here

#

coral geyser Jul 30, 2022, 5:50 AM

#

wary cloak Last time we where here

yep it's on that page

wary cloak Jul 30, 2022, 5:50 AM

#

#

Maybe?

#

Oh there's a write one

coral geyser Jul 30, 2022, 5:50 AM

#

wary cloak

hmm, the linux version just writes

wary cloak Jul 30, 2022, 5:51 AM

#

#

There

coral geyser Jul 30, 2022, 5:51 AM

#

so looks like we need

wary cloak Jul 30, 2022, 5:51 AM

#

Read more? Because seems it's only the signature

coral geyser Jul 30, 2022, 5:52 AM

#

fn apply(&mut self) {
  self.dev.write(address, data);
}

wary cloak Jul 30, 2022, 5:52 AM

#

Oh

coral geyser Jul 30, 2022, 5:52 AM

#

so, first problem, where do we get address from ferrisThink

wary cloak Jul 30, 2022, 5:53 AM

#

The adress of what exactly?

#

(Btw are we kinda doing our own library for our specific case?)

coral geyser Jul 30, 2022, 5:54 AM

#

on i2c you can have multiple devices. Each has it's own address that it will respond to

wary cloak Jul 30, 2022, 5:54 AM

#

Multiple devices? How?

#

It's only on one LCD

coral geyser Jul 30, 2022, 5:54 AM

#

wary cloak (Btw are we kinda doing our own library for our specific case?)

you can thing of it like that

wary cloak Jul 30, 2022, 5:54 AM

#

Oh right!

#

I remember

#

Remember the code I sent you

#

Well that library had an LCD object

#

Which constructor if I remember correctly

#

Needed, columns, rows, and the adresa

#

A dress*

#

Adress*

#

When trying to see like

#

What needed to be there

#

It seemed like it cooould vary but

#

The number was basically always the same and it worked with my LCD so

#

The adress should be that one let me scroll up

coral geyser Jul 30, 2022, 5:56 AM

#

LiquidCrystal_I2C lcd(0x27, 20, 4);

#

this one?

wary cloak Jul 30, 2022, 5:56 AM

#

wary cloak ``` #include <LiquidCrystal_I2C.h> #include <Keypad.h> LiquidCrystal_I2C lcd(0x...

0x27

#

Yes

#

I remember that was an adress

#

And that it worked on mine ofc and that it kinda was always that a friend of mine did the same

#

I heard it could be another if unlucky

#

But technically it's that

coral geyser Jul 30, 2022, 5:57 AM

#

So lets use that

const ADDRESS: u8 = 0x27;

wary cloak Jul 30, 2022, 5:58 AM

#

I can't believe it was actually useful I was also.. (?

wary cloak Jul 30, 2022, 5:58 AM

#

coral geyser So lets use that ```rust const ADDRESS: u8 = 0x27; ```

At the very top?

coral geyser Jul 30, 2022, 5:58 AM

#

wary cloak At the very top?

usually I put them after any use ... statements

wary cloak Jul 30, 2022, 5:59 AM

#

Done so

wary cloak Jul 30, 2022, 5:59 AM

#

coral geyser ```rust fn apply(&mut self) { self.dev.write(address, data); } ```

I replace adress with ADRESS ig

coral geyser Jul 30, 2022, 5:59 AM

#

fn apply(&mut self) {
  self.dev.write(ADDRESS, &[self.data]);
}

wary cloak Jul 30, 2022, 6:00 AM

#

Why the change to data?

coral geyser Jul 30, 2022, 6:00 AM

#

here write expects a slice of bytes, but we just have 1

wary cloak Jul 30, 2022, 6:01 AM

#

I didn't understand honestly how using the constant adress changed that

#

It expected data to be a slice of bytes?

coral geyser Jul 30, 2022, 6:01 AM

#

wary cloak I didn't understand honestly how using the constant adress changed that

It didn't it was just another change we needed

coral geyser Jul 30, 2022, 6:02 AM

#

wary cloak It expected data to be a slice of bytes?

fn write(&mut self, address: u8, bytes: &[u8]) -> Result<(), Self::Error>

here bytes is a slice of bytes (u8)

wary cloak Jul 30, 2022, 6:02 AM

#

idk what you mean slice of bytes instead of x amount of bytes, slice I only think of it as either strings slices or part of an array
why we have only one?

wary cloak Jul 30, 2022, 6:03 AM

#

wary cloak 1) idk what you mean slice of bytes instead of x amount of bytes, slice I only t...

Well or vector you know

#

Unless it was a buffer and it's as slice of a buffer or smth-

coral geyser Jul 30, 2022, 6:03 AM

#

wary cloak 1) idk what you mean slice of bytes instead of x amount of bytes, slice I only t...

A slice &[T] is a continuous sequence of T somewhere in memory (https://doc.rust-lang.org/book/ch04-03-slices.html)

The Slice Type - The Rust Programming Language

#

Here the write function lets you write a buffer of some size to the device at the address

#

So we could do something like self.dev.write(address, &[1, 2, 3, 4, 5])

#

However, to point 2, we only have 1 byte to write because that is what the LCD device expects

wary cloak Jul 30, 2022, 6:04 AM

#

Oh

#

I think I more or less get it

#

Good enough

coral geyser Jul 30, 2022, 6:05 AM

#

coral geyser ```rust fn write(&mut self, address: u8, bytes: &[u8]) -> Result<(), Self::Error...

going back to this ^ Result<(), Self::Error>, we have to decide what to do with it

#

We sort of removed all the error handling code

wary cloak Jul 30, 2022, 6:05 AM

#

Mmm

coral geyser Jul 30, 2022, 6:06 AM

#

What do you want to do if an error happens?

wary cloak Jul 30, 2022, 6:06 AM

#

Unwrap when calling?

coral geyser Jul 30, 2022, 6:06 AM

#

wary cloak Unwrap when calling?

so trigger a panic? sure that works

wary cloak Jul 30, 2022, 6:06 AM

#

coral geyser What do you want to do if an error happens?

I mean I thought we didn't needed it because it can't happen it was because Linux made this harder

#

So if we know more than the compiler, unwrap

#

Only handle if it could happen

coral geyser Jul 30, 2022, 6:07 AM

#

wary cloak I mean I thought we didn't needed it because it can't happen it was because Linu...

ah, it can error, but here it can error if the devices doesn't respond to us

#

Which we expect not to happen as you have control over the hardware configuration

wary cloak Jul 30, 2022, 6:07 AM

#

Mmmmmm

#

I guess for now it's good enough

coral geyser Jul 30, 2022, 6:07 AM

#

But you could do something

wary cloak Jul 30, 2022, 6:07 AM

#

If we something is wrong we'll do it, idk, you know more(?

#

What would you do? Write error handling or unwrap?

coral geyser Jul 30, 2022, 6:09 AM

#

wary cloak What would you do? Write error handling or unwrap?

I think here unwrap is fine

#

If it errors we don't really have anything we can do to fix it

#

Other than debugging it anyway

#

One idea could be to write the error message to the console so you could see it, but that will take more setup to do

wary cloak Jul 30, 2022, 6:10 AM

#

Now about the last impl block we got rid of the thread use but.. Don't we kinds need delay? Tho also, couldn't we just use the hal delay?

#

kinda*

coral geyser Jul 30, 2022, 6:11 AM

#

wary cloak Now about the last impl block we got rid of the thread use but.. Don't we kinds ...

yep we can just use the arduino_hal one

wary cloak Jul 30, 2022, 6:11 AM

#

Ok let's say bye bye to it then

#

54 lines in the end

coral geyser Jul 30, 2022, 6:11 AM

#

wary cloak Ok let's say bye bye to it then

Well, we still need the impl for the lcd crate to work ferrisHmm

#

impl Delay for Pcf8574 {
    fn delay_us(&mut self, delay_usec: u32) {
        arduino_hal::delay_us(delay_usec);
    }
}

wary cloak Jul 30, 2022, 6:12 AM

#

Shouldn't we add more doc comments or it's fine?

coral geyser Jul 30, 2022, 6:12 AM

#

wary cloak Shouldn't we add more doc comments or it's fine?

whatever you feel like

wary cloak Jul 30, 2022, 6:13 AM

#

Well then ig not because idk what the other thing does

#

So what's next?

coral geyser Jul 30, 2022, 6:13 AM

#

wary cloak So what's next?

now we try it ferrisButGrimacing

wary cloak Jul 30, 2022, 6:13 AM

#

The module lcd it's completed say.

#

So we would use this module with the lcd dependencie we imported say by side?

#

Or only this module

#

Which uses

#

The lcd dependencie inside

#

Dependency*

coral geyser Jul 30, 2022, 6:15 AM

#

wary cloak So we would use this module with the lcd dependencie we imported say by side?

For now we will use lcd library in main.rs for testing. Later you can wrap it all up in another struct

wary cloak Jul 30, 2022, 6:15 AM

#

So we use the module for us and the library imported?

coral geyser Jul 30, 2022, 6:16 AM

#

So in main.rs we need ```rust
let lcd_conn = lcd::new(i2c);

wary cloak Jul 30, 2022, 6:16 AM

#

Made for us*

coral geyser Jul 30, 2022, 6:16 AM

#

wary cloak So we use the module for us and the library imported?

yep

wary cloak Jul 30, 2022, 6:17 AM

#

coral geyser So in main.rs we need ```rust let lcd_conn = lcd::new(i2c); ```

Inside main function or the loop?

coral geyser Jul 30, 2022, 6:17 AM

#

wary cloak Inside main function or the loop?

Do we want to create an lcd every loop or just once?

wary cloak Jul 30, 2022, 6:17 AM

#

So below mod lcd I type use lcd::*?

coral geyser Jul 30, 2022, 6:18 AM

#

wary cloak So below ```mod lcd ``` I type ``` use lcd::*```?

you can add use lcd::*;

#

yep

wary cloak Jul 30, 2022, 6:18 AM

#

I decoment mod lcd now?

wary cloak Jul 30, 2022, 6:18 AM

#

coral geyser Do we want to create an lcd every loop or just once?

I guess only one would make sense

coral geyser Jul 30, 2022, 6:19 AM

#

wary cloak I decoment mod lcd now?

For that I recommend using

//! Doc for module

at the top of lcd.rs

wary cloak Jul 30, 2022, 6:19 AM

#

What's that?

coral geyser Jul 30, 2022, 6:19 AM

#

wary cloak What's that?

//! is like /// but documents the thing containing the doc

wary cloak Jul 30, 2022, 6:20 AM

#

Ok so now I remove the slashes from mod lcd in main?

coral geyser Jul 30, 2022, 6:20 AM

#

wary cloak Ok so now I remove the slashes from mod lcd in main?

yep

#

I recommend //! because it keeps the lcd module docs in lcd.rs

wary cloak Jul 30, 2022, 6:20 AM

#

I have 2 errors in main one in the lcd module

coral geyser Jul 30, 2022, 6:21 AM

#

wait do they say ferrisWhat

wary cloak Jul 30, 2022, 6:21 AM

#

coral geyser Jul 30, 2022, 6:21 AM

#

wary cloak

lets deal with the first one

#

so the issue is we have a dependency named lcd and a module named lcd ferrisballSweat , it doesn't know which you mean

#

try doing use crate::lcd::*; instead

wary cloak Jul 30, 2022, 6:23 AM

#

~Let's make the module name capital ~ ask the one who made the crate to change the name.

wary cloak Jul 30, 2022, 6:23 AM

#

coral geyser try doing `use crate::lcd::*;` instead

Ok

#

Ok it works it's just the unused import warning as always

coral geyser Jul 30, 2022, 6:23 AM

#

wary cloak Ok

we can be more specific by using crate::lcd for the module and ::lcd for the library

wary cloak Jul 30, 2022, 6:23 AM

#

Now the other

coral geyser Jul 30, 2022, 6:24 AM

#

wary cloak

run cargo check

#

it should give a hint

wary cloak Jul 30, 2022, 6:24 AM

#

error[E0599]: no method named `write` found for struct `avr_hal_generic::i2c::I2c` in the current scope
   --> src\lcd.rs:54:18
    |
54  |         self.dev.write(ADDRESS, &[self.data]);
    |                  ^^^^^ method not found in `avr_hal_generic::i2c::I2c<Atmega, arduino_hal::pac::TWI, avr_hal_generic::port::Pin<Input, PD1>, avr_hal_generic::port::Pin<Input, PD0>, MHz16>`
    |
   ::: C:\Users\fuchi\.cargo\registry\src\github.com-1ecc6299db9ec823\embedded-hal-0.2.7\src\blocking\i2c.rs:165:8
    |
165 |     fn write(&mut self, address: A, bytes: &[u8]) -> Result<(), Self::Error>;
    |        ----- the method is available for `avr_hal_generic::i2c::I2c<Atmega, arduino_hal::pac::TWI, avr_hal_generic::port::Pin<Input, PD1>, avr_hal_generic::port::Pin<Input, PD0>, MHz16>` here
    |
    = help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
    |
3   | use embedded_hal::blocking::i2c::Write;
    |

For more information about this error, try `rustc --explain E0599`.

coral geyser Jul 30, 2022, 6:25 AM

#

wary cloak ``` error[E0599]: no method named `write` found for struct `avr_hal_generic::i2c...

    = help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
    |
3   | use embedded_hal::blocking::i2c::Write;
    |

ferrisHmm

wary cloak Jul 30, 2022, 6:25 AM

#

Ao

#

So*

#

Above

#

Use lcd delay hardware

#

We write that other use statement?

coral geyser Jul 30, 2022, 6:26 AM

#

yep

wary cloak Jul 30, 2022, 6:26 AM

#

Rust can be so beautiful

#

Ok no errors merely warnings

coral geyser Jul 30, 2022, 6:26 AM

#

coral geyser ``` = help: items from traits can only be used if the trait is in scope help...

This rule can get annoying, but it helps a lot in more complex situations

coral geyser Jul 30, 2022, 6:27 AM

#

wary cloak Ok no errors merely warnings

So now we need to make one of these LcdConnection structs

wary cloak Jul 30, 2022, 6:27 AM

#

I leave the dp and pin variables?

coral geyser Jul 30, 2022, 6:28 AM

#

wary cloak I leave the dp and pin variables?

yep we will need them shortly

wary cloak Jul 30, 2022, 6:28 AM

#

Ok sure

coral geyser Jul 30, 2022, 6:28 AM

#

let dp = arduino_hal::Peripherals::take().unwrap();
let pins = arduino_hal::pins!(dp);

let mut i2c = arduino_hal::I2c::new(
    dp.TWI,
    pins.a4.into_pull_up_input(),
    pins.a5.into_pull_up_input(),
    50000,
);

wary cloak Jul 30, 2022, 6:29 AM

#

Already an error let me see cargo check

#

error[E0308]: arguments to this function are incorrect
   --> src\main.rs:13:19
    |
13  |     let mut i2c = arduino_hal::I2c::new(
    |                   ^^^^^^^^^^^^^^^^^^^^^
14  |         dp.TWI,
15  |         pins.a4.into_pull_up_input(),
    |         ---------------------------- expected struct `PD1`, found struct `PF4`
16  |         pins.a5.into_pull_up_input(),
    |         ---------------------------- expected struct `PD0`, found struct `PF5`
    |
    = note: expected struct `avr_hal_generic::port::Pin<_, PD1>`
               found struct `avr_hal_generic::port::Pin<_, PF4>`
    = note: expected struct `avr_hal_generic::port::Pin<_, PD0>`
               found struct `avr_hal_generic::port::Pin<_, PF5>`
note: associated function defined here
   --> C:\Users\fuchi\.cargo\git\checkouts\avr-hal-f3855d5807fdfd57\1aacefb\avr-hal-generic\src\i2c.rs:216:12
    |
216 |     pub fn new(
    |            ^^^

coral geyser Jul 30, 2022, 6:30 AM

#

wary cloak ``` error[E0308]: arguments to this function are incorrect --> src\main.rs:13...

ferrisHmm the arduino_hal just prevented a mistake

#

are pins a4 and a5 the i2c pins?

wary cloak Jul 30, 2022, 6:30 AM

#

Ah let me see

#

Where so I have them conected

#

Do*

#

Since I haven't disconnected anything

#

It's wire gore

#

I'll see the simulation

#

Then I can check

#

https://wokwi.com/projects/336566211441590868

Wokwi

sketch.ino - Wokwi Arduino and ESP32 Simulator

Run Arduino projects in your browser, no installation required!

#

#

20 and 21

coral geyser Jul 30, 2022, 6:33 AM

#

so switch a4 and a5 to d20 and d21

wary cloak Jul 30, 2022, 6:34 AM

#

Ok no more errors

#

What's next?

coral geyser Jul 30, 2022, 6:34 AM

#

wary cloak What's next?

now lets try some demo code

let mut lcd = Display::new(lcd_conn);

// initialization
lcd.init(FunctionLine::Line2, FunctionDots::Dots5x8);
lcd.display(
    DisplayMode::DisplayOn,
    DisplayCursor::CursorOff,
    DisplayBlink::BlinkOff);
lcd.entry_mode(EntryModeDirection::EntryRight, EntryModeShift::NoShift);

// print something
write!(&mut lcd, "Hello, my number today is {: >4}", 42).unwrap();

wary cloak Jul 30, 2022, 6:34 AM

#

In loop ig, right?

coral geyser Jul 30, 2022, 6:34 AM

#

wary cloak In loop ig, right?

lets just do this once

wary cloak Jul 30, 2022, 6:35 AM

#

Oh ok then main

#

One error for each lone of copying that

#

All undeclared types it seems

#

But I'll run cargo check to show you

#

error[E0433]: failed to resolve: use of undeclared type `FunctionLine`
  --> src\main.rs:23:14
   |
23 |     lcd.init(FunctionLine::Line2, FunctionDots::Dots5x8);
   |              ^^^^^^^^^^^^ use of undeclared type `FunctionLine`

error[E0433]: failed to resolve: use of undeclared type `FunctionDots`
  --> src\main.rs:23:35
   |
23 |     lcd.init(FunctionLine::Line2, FunctionDots::Dots5x8);
   |                                   ^^^^^^^^^^^^ use of undeclared type `FunctionDots`

error[E0433]: failed to resolve: use of undeclared type `DisplayMode`
  --> src\main.rs:25:9
   |
25 |         DisplayMode::DisplayOn,
   |         ^^^^^^^^^^^ use of undeclared type `DisplayMode`

error[E0433]: failed to resolve: use of undeclared type `DisplayCursor`
  --> src\main.rs:26:9
   |
26 |         DisplayCursor::CursorOff,
   |         ^^^^^^^^^^^^^ use of undeclared type `DisplayCursor`

error[E0433]: failed to resolve: use of undeclared type `DisplayBlink`
  --> src\main.rs:27:9
   |
27 |         DisplayBlink::BlinkOff);
   |         ^^^^^^^^^^^^ use of undeclared type `DisplayBlink`

error[E0433]: failed to resolve: use of undeclared type `EntryModeDirection`
  --> src\main.rs:28:20
   |
28 |     lcd.entry_mode(EntryModeDirection::EntryRight, EntryModeShift::NoShift);
   |                    ^^^^^^^^^^^^^^^^^^ use of undeclared type `EntryModeDirection`

error[E0433]: failed to resolve: use of undeclared type `EntryModeShift`
  --> src\main.rs:28:52
   |
28 |     lcd.entry_mode(EntryModeDirection::EntryRight, EntryModeShift::NoShift);
   |                                                    ^^^^^^^^^^^^^^ use of undeclared type `EntryModeShift`

#

error[E0433]: failed to resolve: use of undeclared type `Display`
  --> src\main.rs:20:19
   |
20 |     let mut lcd = Display::new(lcd_conn);
   |                   ^^^^^^^ not found in this scope
   |
help: consider importing one of these items
   |
4  | use core::fmt::Display;
   |
4  | use lcd::Display;
   |

error[E0425]: cannot find value `lcd_conn` in this scope
  --> src\main.rs:20:32
   |
20 |     let mut lcd = Display::new(lcd_conn);
   |                                ^^^^^^^^ not found in this scope

coral geyser Jul 30, 2022, 6:38 AM

#

try adding a use ::lcd::*;

wary cloak Jul 30, 2022, 6:39 AM

#

Ok now only two

#

Why did that work if we already had

#

use crate::lcd::*;

coral geyser Jul 30, 2022, 6:39 AM

#

wary cloak ```use crate::lcd::*;```

because these types come from the library

wary cloak Jul 30, 2022, 6:40 AM

#

Wait

#

So that was from our module?

#

Because I still have mod lcd up there

#

I thought that was for the library

coral geyser Jul 30, 2022, 6:40 AM

#

wary cloak Because I still have mod lcd up there

use crate::lcd::*; is your lcd.rs module

#

crate refers to main.rs

wary cloak Jul 30, 2022, 6:42 AM

#

error[E0425]: cannot find value lcd_conn in this scope
--> src\main.rs:20:32
|
20 | let mut lcd = Display::new(lcd_conn);
| ^^^^^^^^ not found in this scope

#

Wait

#

There's one more

#

But I can't get it

coral geyser Jul 30, 2022, 6:42 AM

#

wary cloak error[E0425]: cannot find value `lcd_conn` in this scope --> src\main.rs:20:32...

what did you call the LcdConnection?

wary cloak Jul 30, 2022, 6:43 AM

#

error[E0599]: no method named write_fmt found for mutable reference &mut lcd::Display<_> in the current scope
--> src\main.rs:32:5
|
32 | write!(&mut lcd, "Hello, my number today is {: >4}", 42).unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: items from traits can only be used if the trait is in scope
= note: this error originates in the macro write (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following trait is implemented but not in scope; perhaps add a use for it:
|
3 | use core::fmt::Write;
|
help: there is an associated function with a similar name
--> C:\Users\fuchi.rustup\toolchains\nightly-2022-06-13-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\macros\mod.rs:500:27
|
500| let result = $dst.write($crate::format_args!($($arg)*));

coral geyser Jul 30, 2022, 6:43 AM

#

wary cloak error[E0599]: no method named `write_fmt` found for mutable reference `&mut lcd:...

 use core::fmt::Write;

coral geyser Jul 30, 2022, 6:43 AM

#

wary cloak error[E0425]: cannot find value `lcd_conn` in this scope --> src\main.rs:20:32...

let lcd_conn = LcdConnection::new(i2c);

wary cloak Jul 30, 2022, 6:44 AM

#

coral geyser ```rust let lcd_conn = LcdConnection::new(i2c); ```

That where?

coral geyser Jul 30, 2022, 6:44 AM

#

wary cloak That where?

above the Display::new()

#

below let mut i2c ...

wary cloak Jul 30, 2022, 6:45 AM

#

finally this warnings i considered relevant

#

warning: variable does not need to be mutable
--> src\main.rs:15:9
|
15 | let mut i2c = arduino_hal::I2c::new(
| ----^^^
| |
| help: remove this mut
|
= note: #[warn(unused_mut)] on by default

warning: unused Result that must be used
--> src\lcd.rs:54:9
|
54 | self.dev.write(ADDRESS, &[self.data]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_must_use)] on by default
= note: this Result may be an Err variant, which should be handled

warning: rust_lcd (bin "rust_lcd") generated 2 warnings

coral geyser Jul 30, 2022, 6:46 AM

#

wary cloak warning: variable does not need to be mutable --> src\main.rs:15:9 | 15 | ...

remove the mut (as we just give it to LcdConnection) and then a .unwrap() for the second

wary cloak Jul 30, 2022, 6:47 AM

#

So this is an example to see if the lcd turns on and writes stuff so we can finally use it?

coral geyser Jul 30, 2022, 6:48 AM

#

yep

wary cloak Jul 30, 2022, 6:48 AM

#

No errors no warnings, I connect it and use cargo run?

coral geyser Jul 30, 2022, 6:48 AM

#

yep

wary cloak Jul 30, 2022, 6:48 AM

#

Tho I predict

#

It won't work because of the same reason the first code didn't

#

Because of the wire gore it may not know what to do and we probably would have to specify something

#

Or maybe the library will handle it let's see

#

I knew it

#

Error: no matching serial port found, use -P or set RAVEDUDE_PORT in your environment

Caused by: Serial port not found.
error: process didn't exit successfully: ravedude mega2560 -b 57600 target\avr-atmega2560\debug\rust_lcd.elf (exit code: 1)
PS C:\Users\fuchi\OneDrive\Documentos\Codigos_Rust\rust_lcd>

#

com 6 again?

coral geyser Jul 30, 2022, 6:50 AM

#

wary cloak com 6 again?

probably

wary cloak Jul 30, 2022, 6:51 AM

#

tho maybe the reason is not the wire gore huh

coral geyser Jul 30, 2022, 6:51 AM

#

wary cloak tho maybe the reason is not the wire gore huh

Your mega is not an official one right?

wary cloak Jul 30, 2022, 6:51 AM

#

Ah it says made in China so..

coral geyser Jul 30, 2022, 6:52 AM

#

ravedude looks for a specific chip id which the non official ones don't use because price

wary cloak Jul 30, 2022, 6:53 AM

#

#

It works

coral geyser Jul 30, 2022, 6:53 AM

#

hmm, it skipped a line

wary cloak Jul 30, 2022, 6:54 AM

#

Too may characters

#

Oh

#

You are right

#

Many*

coral geyser Jul 30, 2022, 6:55 AM

#

FunctionLine::Line2 is suspicious

wary cloak Jul 30, 2022, 6:55 AM

#

Do I change it to line 1?

coral geyser Jul 30, 2022, 6:56 AM

#

wary cloak Do I change it to line 1?

try it and see what happens

wary cloak Jul 30, 2022, 6:56 AM

#

It like

#

Underlined the lines which it's written in

#

But it's written in the same place

#

#

I'll try now 0

#

If it's error then only line

#

Line and line 0 doesn't exist

#

So I will try 3

coral geyser Jul 30, 2022, 6:59 AM

#

there is only 1, 2 (you can check the docs)

wary cloak Jul 30, 2022, 6:59 AM

#

What..

#

Yeah there's only 1 and 2

#

So it's not that

coral geyser Jul 30, 2022, 6:59 AM

#

display.position(0, 1);

before the write!

wary cloak Jul 30, 2022, 6:59 AM

#

It's merely an underliner

#

I see it's similar to it's c++ counter but more complicated (?

#

error

coral geyser Jul 30, 2022, 7:01 AM

#

oh, wait for you it's lcd.

wary cloak Jul 30, 2022, 7:01 AM

#

error[E0425]: cannot find value display in this scope
--> src\main.rs:34:5
|
34 | display.position(0, 1);
| ^^^^^^^ not found in this scope

For more information about this error, try rustc --explain E0425.
error: could not compile rust_lcd due to previous error

#

oh ok

#

#

It starts counting in 0

#

So you set the starting text there

#Arduino Help