Add support for ESP32-3248S035C using a ST7796 screen and a GT911 touch panel

[morcibacsi]

Device Name (デバイスの名称・型番等)

Jingcai ESP32-3248S035C

URL of Device Specifications document (仕様書等のURL)

http://pan.jczn1688.com/pd/1/ESP32%20module/3.5inch_ESP32-3248S035.zip?signature=805908560078de8ef3afa0a055ba59a323b5ba57e36e3dd7b1451e60b69732d291fcf8daa348e40ac8f9fdae1289c53dbfc0d6868235a6da2d7d7b9812bad1dc

URL of the store where we can purchase (商品を購入できるURL)

https://www.aliexpress.com/item/1005009316367422.html

This is a ESP32 Cheap Yellow Display (CYD) variant using a ST7796 screen and a GT911 touch panel.

Tested with examples\Advanced\LVGL_PlatformIO

Here is the configured driver file. Both the display and the touch is working.

//LGFX_Jingcai_ESP32-3248S035C.hpp
#pragma once

#define LGFX_USE_V1

#include <LovyanGFX.hpp>

class LGFX : public lgfx::LGFX_Device
{
  lgfx::Panel_ST7796  _panel_instance;
  lgfx::Bus_SPI       _bus_instance;
  lgfx::Light_PWM     _light_instance;
  lgfx::Touch_GT911   _touch_instance;

public:

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

      cfg.spi_host = VSPI_HOST;
      cfg.spi_mode = 0;
      cfg.freq_write = 40000000;
      cfg.freq_read  = 16000000;
      cfg.spi_3wire  = true;
      cfg.use_lock   = true;
      cfg.dma_channel = SPI_DMA_CH_AUTO;
      cfg.pin_sclk = 14;
      cfg.pin_mosi = 13;
      cfg.pin_miso = 12;
      cfg.pin_dc   = 2;

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

    {
      auto cfg = _panel_instance.config();

      cfg.pin_cs           =    15;
      cfg.pin_rst          =    -1;
      cfg.pin_busy         =    -1;

      cfg.panel_width      =   320;
      cfg.panel_height     =   480;
      cfg.offset_x         =     0;
      cfg.offset_y         =     0;
      cfg.offset_rotation  =     0;
      cfg.dummy_read_pixel =     8;
      cfg.dummy_read_bits  =     1;
      cfg.readable         =  true;
      cfg.invert           = false;
      cfg.rgb_order        = false;
      cfg.dlen_16bit       = false;
      cfg.bus_shared       =  true;

      _panel_instance.config(cfg);
    }

    {
      auto cfg = _light_instance.config();

      cfg.pin_bl = 27;
      cfg.invert = false;
      cfg.freq   = 44100;
      cfg.pwm_channel = 7;

      _light_instance.config(cfg);
      _panel_instance.setLight(&_light_instance);
    }

    {
      auto cfg = _touch_instance.config();

      cfg.x_min      = 0;
      cfg.x_max      = 319;
      cfg.y_min      = 0;
      cfg.y_max      = 479;
      cfg.pin_int    = -1;
      cfg.pin_rst    = 25;
      cfg.bus_shared = false;
      cfg.offset_rotation = 0;

      cfg.i2c_port = 1;
      cfg.i2c_addr = 0x5D;
      cfg.pin_sda  = 33;
      cfg.pin_scl  = 32;
      cfg.freq = 400000;

      _touch_instance.config(cfg);
      _panel_instance.setTouch(&_touch_instance);
    }
    setPanel(&_panel_instance);
  }
};