wiring of ssd1322

[wary cobalt]

how would i wire this 16 pin display to an i2c interface and that to an esp or arduino? https://www.robotics.org.za/OLED-31-SPI-33V-YEL

[marsh schooner]

if you want 4-wire

and the answer for i2c is you don't this chip can only be used for parrallel or SPI communication

if you look at the options for the BS0 and BS1 pins, no configuration there allows for I2C

[wary cobalt]

i have bridged it to 4 pin spi but i cant get it working for whatever reason

[marsh schooner]

do you have E and R/W tied low?

IIRC, for it to work properly, D3-D7 must be tied to ground, as well as E and R/W#

[wary cobalt]

wired it up like this https://forum.arduino.cc/t/oled-ssd1322-an-esp32-az-delivery/1244946/4?page=2

but they all need to be on ground. does it also require the on board mosi and clk pins from the esp?

[marsh schooner]

no just the ones going to the COG of the OLED

notice D2 is not connected

i think that is because it could be used for MISO... but who needs to read data from a screen

[wary cobalt]

whats the reason behind all of those going to ground?

[marsh schooner]

well, the RD# and the WR# are probably because otherwise the read/write functionality doesn't work

the d3-7 are probably so spurious noise doesn't mess anything else up in the circuit

[wary cobalt]

wait here it says hardware spi, so i will need to pay attention which pin it goes to

[marsh schooner]

you are using an ESP32?,... you can remap the hardware spi pins if you are

[wary cobalt]

wut

[marsh schooner]

but it is just as easy to wire them up to the default location

ESP32s have a switch matrix for their digital IO, most Digital IO that go to subsystems, like SPI, can be remapped in code to different pins

[wary cobalt]

this one to be exact

[marsh schooner]

but it isn't trivial so using the default location is just as good

[wary cobalt]

where do you find such wiring guides btw? im dying to find such stuff

[marsh schooner]

the one further up?

[wary cobalt]

yeah

[marsh schooner]

https://forum.arduino.cc/t/buydisplay-com-3-2-oled-ssd1322-arduino-mega-hw-spi-u8g2-library/863200

[wary cobalt]

should i go with 3 or 4 pin spi btw? ive soldered it to 4 now

[marsh schooner]

if you have the pins, do the 4, it just allows for faster communication

[wary cobalt]

Still no worky

[wary cobalt]

Nvm it does work but this is apparently full screen lit

[marsh schooner]

You will need to play with the initialization setting to find what way to have it work through the memory

[wary cobalt]

What do I adjust here

U8G2_SSD1322_256x64_F_4W_HW_SPI

[marsh schooner]

I had to play with all the settings and make sure to set the memory pages correctly

[wary cobalt]

i have literally no idea what youre talking about

[marsh schooner]

When I am not on my phone I'll put together some notes

[marsh schooner]

first thing try this
https://github.com/olikraus/u8g2/issues/1007

[marsh schooner]

also try U8G2_SSD1322_ZJY_256X64_1_4W_HW_SPI

https://forum.arduino.cc/t/arduino-nano-and-ssd1322-3-12/948891 this post is claiming it is the NHD Version

U8G2_SSD1322_NHD_256X64_F_4W_HW_SPI

[wary cobalt]

i cant even get this to work anymore im so pissed of rn

[wary cobalt]

different esp and it works, thx

and i also dont need to connect a bigilion of ground pins

[marsh schooner]

Cool glad you got it working

[wary cobalt]

Yeah it stopped working like on the previous chip. I have no idea what I’m doing wrong

[marsh schooner]

Try grounding the Rd and write pins they could be floating and causing errors

[wary cobalt]

no it doesnt make a difference then it shouldve worked on the other chip aswell its just dead again and i have no clue as to why

[marsh schooner]

do you have a logic analyzer, or scope or something?

I would be interested to see if the pins are burned out due to something

[wary cobalt]

i dont but my dad has, will try to test