(working) support for LILYGO T-Display-S3 ESP32-S3

[erazor83]

class LGFX : public lgfx::LGFX_Device
{
    lgfx::Panel_ST7789	_panel_instance;
    lgfx::Bus_Parallel8	_bus_instance;
    lgfx::Light_PWM     _light_instance;

public:

  LGFX(void)
  {
    {
      auto cfg = _bus_instance.config();
      
      cfg.freq_write =				20000000;
      cfg.pin_wr =					8;
      cfg.pin_rd =					9;
      cfg.pin_rs =					7;
      cfg.pin_d0 =					39;
      cfg.pin_d1 =					40;
      cfg.pin_d2 =					41;
      cfg.pin_d3 =					42;
      cfg.pin_d4 =					45;
      cfg.pin_d5 =					46;
      cfg.pin_d6 =					47;
      cfg.pin_d7 =					48;

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

    {
      auto cfg = _panel_instance.config();

      cfg.pin_cs =					6;
      cfg.pin_rst =					5;
      cfg.pin_busy =				-1;

      cfg.panel_width =				170;
      cfg.panel_height =				320;
      cfg.offset_x =					35;
      cfg.offset_y =					0;
      cfg.offset_rotation =			0;
      cfg.dummy_read_pixel = 		8;
      cfg.dummy_read_bits =		1;
      cfg.readable = 				false;
      cfg.invert =					true;
      cfg.rgb_order =				false;
      cfg.dlen_16bit =				false;
      cfg.bus_shared =				true;

      _panel_instance.config(cfg);
    }

    {
      auto cfg = _light_instance.config();

      cfg.pin_bl =					38;
      cfg.invert =					false;
      cfg.freq   =					44100;
      cfg.pwm_channel =			0;

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

    setPanel(&_panel_instance);
  }
};

There is also a version with touch - I might add this later.

Not sure if reading is possible or even if the freq_write is ok but it works for me.