2022 M5 Stamp Pico and Waveshare epaper Arduino Library?

[hausofpayne]

Re: Connecting Epaper display to m5stack core or other models ? (Waveshare)

Site says previous topic is old so I started a new one on its suggestion.

Hi there. I know there's an M5Paper product.

But I'd like to connect a Waveshare 1.54" bw epaper display to an M5Stamp Pico board.

Are there any Arduino libraries available to do this?what are they called?

What are the M5 pins that I connect the DI, SCK, CS, Dc, BUSY and RESET pins.

Thanks for your suggestions/recommendations.

[felmue]

Hello @hausofpayne

ESP32 allows to assign almost any functionality (SPI, I2C, etc.) to almost any GPIOs.

Using the example GxEPD2_WS_ESP32_Driver.ino from the GxEPD2 library with the following GPIO setup worked for me. (Note: I used a Waveshare 2.9" ePaper for my test.)

• DI <--> 26
• SCK <--> 18
• CS <--> 21
• DC <--> 22
• BUSY <--> 32
• RESET <--> 33

On line 118 of the example you set the GPIOs for CS, DC, RST and BUSY:

GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=*/ 21, /*DC=*/ 22, /*RST=*/ 33, /*BUSY=*/ 32));

On line 150 of the example you set the GPIOs for SPI:

  SPI.begin(18, 36, 26, 21); // map and init SPI pins SCK(18), MISO(36), MOSI(26), SS(21)

Thanks
Felix