ESP32C3 with GC9A01/GC9D01 display 0.71"

[multiOTP]

/*******************************************
 * ESP32C3 with GC9A01/GC9D01 display 0.71 *
********************************************/
#pragma once
#define LGFX_USE_V1
#include <LovyanGFX.hpp>

class Round_GC9A01_071 : public lgfx::Panel_GC9A01 {
public:
  const uint8_t* getInitCommands(uint8_t listno) const override
  {
    static constexpr uint8_t list0[] = {
      0xFE, 0,
      0xEF, 0,
      0x80, 1, 0xFF,
      0x81, 1, 0xFF,
      0x82, 1, 0xFF,
      0x83, 1, 0xFF,
      0x84, 1, 0xFF,
      0x85, 1, 0xFF,
      0x86, 1, 0xFF,
      0x87, 1, 0xFF,
      0x88, 1, 0xFF,
      0x89, 1, 0xFF,
      0x8A, 1, 0xFF,
      0x8B, 1, 0xFF,
      0x8C, 1, 0xFF,
      0x8D, 1, 0xFF,
      0x8E, 1, 0xFF,
      0x8F, 1, 0xFF,

      0x3A, 1, 0x05,
      0xEC, 1, 0x01,

      0x74, 7, 0x02, 0x0E, 0x00, 0x00, 0x00, 0x00, 0x00,

      0x98, 1, 0x3E,
      0x99, 1, 0x3E,

      0xB5, 2, 0x0D, 0x0D,

      0x60, 4, 0x38, 0x0F, 0x79, 0x67,
      0x61, 4, 0x38, 0x11, 0x79, 0x67,

      0x64, 6, 0x38, 0x17, 0x71, 0x5F, 0x79, 0x67,
      0x65, 6, 0x38, 0x13, 0x71, 0x5B, 0x79, 0x67,

      0x6A, 2, 0x00, 0x00,

      0x6C, 7, 0x22, 0x02, 0x22, 0x02, 0x22, 0x22, 0x50,

      0x6E, 32,
        0x03, 0x03, 0x01, 0x01,
        0x00, 0x00, 0x0f, 0x0f,
        0x0d, 0x0d, 0x0b, 0x0b,
        0x09, 0x09, 0x00, 0x00,
        0x00, 0x00, 0x0a, 0x0a,
        0x0c, 0x0c, 0x0e, 0x0e,
        0x10, 0x10, 0x00, 0x00,
        0x02, 0x02, 0x04, 0x04,

      0xBF, 1, 0x01,
      0xF9, 1, 0x40,

      0x9B, 1, 0x3B,
      0x93, 3, 0x33, 0x7F, 0x00,

      0x7E, 1, 0x30,

      0x70, 6, 0x0D, 0x02, 0x08, 0x0D, 0x02, 0x08,
      0x71, 3, 0x0D, 0x02, 0x08,

      0x91, 2, 0x0E, 0x09,

      0xC3, 1, 0x19,
      0xC4, 1, 0x19,
      0xC9, 1, 0x3C,

      0xF0, 6, 0x53, 0x15, 0x0A, 0x04, 0x00, 0x3E,
      0xF2, 6, 0x53, 0x15, 0x0A, 0x04, 0x00, 0x3A,

      0xF1, 6, 0x56, 0xA8, 0x7F, 0x33, 0x34, 0x5F,
      0xF3, 6, 0x52, 0xA4, 0x7F, 0x33, 0x34, 0xDF,

      0x36, 1, 0x00,

      0x11, 0+CMD_INIT_DELAY, 200,

      0x29, 0,     // display on
      0x2C, 0,     // memory write
      0xFF, 0xFF   // end of list
    };
    switch (listno) {
      case 0: return list0;
      default: return nullptr;
    }
  }
};

class LGFX : public lgfx::LGFX_Device {
  lgfx::Bus_SPI     _bus_instance;
  Round_GC9A01_071  _panel_instance;

public:
  LGFX(void) {
    {
      auto cfg = _bus_instance.config();

      cfg.spi_host    = SPI2_HOST;
      cfg.spi_mode    = 0;
      cfg.freq_write  = 27000000; // 27000000
      cfg.freq_read   = 20000000; // 20000000
      cfg.spi_3wire   = false;
      cfg.use_lock    = true;
      cfg.dma_channel = SPI_DMA_CH_AUTO; // SPI_DMA_CH_AUTO

      cfg.pin_sclk = 6;
      cfg.pin_mosi = 7;
      cfg.pin_miso = -1;
      cfg.pin_dc   = 4;

      _bus_instance.config(cfg);
      _panel_instance.setBus(&_bus_instance);
    }

    {
      auto cfg = _panel_instance.config();

      cfg.pin_cs   = 5;
      cfg.pin_rst  = 8; // 8
      cfg.pin_busy = -1;

      cfg.panel_width    = 160;
      cfg.panel_height   = 160;
      cfg.memory_width   = 160;
      cfg.memory_height  = 160;
      cfg.offset_x       = 0;
      cfg.offset_y       = 0;
      cfg.offset_rotation = 0;
      cfg.dummy_read_pixel = 8;
      cfg.dummy_read_bits  = 1;
      cfg.readable         = false;
      cfg.invert           = false;
      cfg.rgb_order        = 1; // 0: RGB, 1: BGR
      cfg.dlen_16bit       = false;
      cfg.bus_shared       = false;

      _panel_instance.config(cfg);
    }

    setPanel(&_panel_instance);
  }
};

[tobozo]

hi,

thanks for sharing this 👍

[tobozo]

I've added that panel profile and initCommands to Panel_GC9A01.hpp on the develop branch, it can be accessed as Panel_Round_GC9A01_071.

[multiOTP]

Thanks :-) - Merci !

[msoft444]

@tobozo @multiOTP
I think there might be a typo in Panel_Round_GC9A01_071. It should be Panel_Round_GC9D01_071.

[tobozo]

not a typo, it's valid for both

/*******************************************
 * ESP32C3 with GC9A01/GC9D01 display 0.71 *
********************************************/

[msoft444]

There are no 0.71-inch round displays with the GC9A01 driver; they only come with the GC9D01 driver.