HomeDynamic/experimental/Sonoff Test/Sonoff-Tasmota-6.4.1/lib/esp-epaper-29-ws-20171230-gemu-1.0/main

Example: e-paper dispalys

This test code shows how to use ESP32 driver e-Paper displays

• Support for Waveshare 2.7inch e-Paper HAT based ePaper modules in 4-wire SPI mode

e-paper functions:

• Graphics drawing functions:

  • Paint_Clear Clear all screen memery
  • Paint_DrawAbsolutePixel This draws a pixel by absolute coordinates
  • Paint_GetImage Getters and Setters
  • Paint_SetRotate Setup displays rotate
  • Paint_DrawPixel Draws a pixel by the coordinates
  • Paint_DrawCharAt Draw a charactor on the frame buffer but not refresh
  • Paint_DrawStringAt Displays a string on the frame buffer but not refresh
  • Paint_DrawLine Draws a line on the frame buffer
  • Paint_DrawHorizontalLine Draw a horizontal line on the frame buffer
  • Paint_DrawVerticalLine Draw a vertical line on the frame buffer
  • Paint_DrawRectangle Draws a rectangle
  • Paint_DrawFilledRectangle Draws a filled rectangle
  • Paint_DrawCircle Draws a circle
  • Paint_DrawFilledCircle Draws a filled circle

• Fonts:

  • Support for font8,font12,font16,font20,font24, fonts embeded
    

• String write function:

  • EPD_print Write text to display.

• Images:

  • Can display the image form C array

Connecting the display

• mosi: 23 (display DIN)
• sck: 18
• CS: 5 (display CS)
• DC: 26 (display DC)
• RST: 27 (display RESET)
• BUSY: 32 (display BUSY output)
  
  

How to build

make menuconfig

Make and flash the example.

make all && make flash

Test:

• Dispaly espressif logo for 2s
• display the random value on e-paper, refresh 5s