Arduino_ESP32RGBPanel.cpp
#include "Arduino_ESP32RGBPanel.h"

#if defined(ESP32) && (CONFIG_IDF_TARGET_ESP32S3)
#if (ESP_ARDUINO_VERSION_MAJOR < 3)

Arduino_ESP32RGBPanel::Arduino_ESP32RGBPanel(
    int8_t de, int8_t vsync, int8_t hsync, int8_t pclk,
    int8_t r0, int8_t r1, int8_t r2, int8_t r3, int8_t r4,
    int8_t g0, int8_t g1, int8_t g2, int8_t g3, int8_t g4, int8_t g5,
    int8_t b0, int8_t b1, int8_t b2, int8_t b3, int8_t b4,
    uint16_t hsync_polarity, uint16_t hsync_front_porch, uint16_t hsync_pulse_width, uint16_t hsync_back_porch,
    uint16_t vsync_polarity, uint16_t vsync_front_porch, uint16_t vsync_pulse_width, uint16_t vsync_back_porch,
    uint16_t pclk_active_neg, int32_t prefer_speed, bool useBigEndian,
    uint16_t de_idle_high, uint16_t pclk_idle_high)
    : _de(de), _vsync(vsync), _hsync(hsync), _pclk(pclk),
      _r0(r0), _r1(r1), _r2(r2), _r3(r3), _r4(r4),
      _g0(g0), _g1(g1), _g2(g2), _g3(g3), _g4(g4), _g5(g5),
      _b0(b0), _b1(b1), _b2(b2), _b3(b3), _b4(b4),
      _hsync_polarity(hsync_polarity), _hsync_front_porch(hsync_front_porch), _hsync_pulse_width(hsync_pulse_width), _hsync_back_porch(hsync_back_porch),
      _vsync_polarity(vsync_polarity), _vsync_front_porch(vsync_front_porch), _vsync_pulse_width(vsync_pulse_width), _vsync_back_porch(vsync_back_porch),
      _pclk_active_neg(pclk_active_neg), _prefer_speed(prefer_speed), _useBigEndian(useBigEndian),
      _de_idle_high(de_idle_high), _pclk_idle_high(pclk_idle_high)
{
}

bool Arduino_ESP32RGBPanel::begin(int32_t speed)
{
  if (speed == GFX_NOT_DEFINED)
  {
#ifdef CONFIG_SPIRAM_MODE_QUAD
    _speed = 6000000L;
#else
    _speed = 12000000L;
#endif
  }
  else
  {
    _speed = speed;
  }

  return true;
}

uint16_t *Arduino_ESP32RGBPanel::getFrameBuffer(int16_t w, int16_t h)
{
  esp_lcd_rgb_panel_config_t *_panel_config = (esp_lcd_rgb_panel_config_t *)heap_caps_calloc(1, sizeof(esp_lcd_rgb_panel_config_t), MALLOC_CAP_DMA | MALLOC_CAP_INTERNAL);

  _panel_config->clk_src = LCD_CLK_SRC_PLL160M;
  _panel_config->timings.pclk_hz = (_prefer_speed == GFX_NOT_DEFINED) ? _speed : _prefer_speed;
  _panel_config->timings.h_res = w;
  _panel_config->timings.v_res = h;
  // The following parameters should refer to LCD spec
  _panel_config->timings.hsync_pulse_width = _hsync_pulse_width;
  _panel_config->timings.hsync_back_porch = _hsync_back_porch;
  _panel_config->timings.hsync_front_porch = _hsync_front_porch;
  _panel_config->timings.vsync_pulse_width = _vsync_pulse_width;
  _panel_config->timings.vsync_back_porch = _vsync_back_porch;
  _panel_config->timings.vsync_front_porch = _vsync_front_porch;
  _panel_config->timings.flags.hsync_idle_low = (_hsync_polarity == 0) ? 1 : 0;
  _panel_config->timings.flags.vsync_idle_low = (_vsync_polarity == 0) ? 1 : 0;
  _panel_config->timings.flags.de_idle_high = _de_idle_high;
  _panel_config->timings.flags.pclk_active_neg = _pclk_active_neg;
  _panel_config->timings.flags.pclk_idle_high = _pclk_idle_high;

  _panel_config->data_width = 16; // RGB565 in parallel mode, thus 16bit in width
  _panel_config->sram_trans_align = 8;
  _panel_config->psram_trans_align = 64;
  _panel_config->hsync_gpio_num = _hsync;
  _panel_config->vsync_gpio_num = _vsync;
  _panel_config->de_gpio_num = _de;
  _panel_config->pclk_gpio_num = _pclk;

  if (_useBigEndian)
  {
    _panel_config->data_gpio_nums[0] = _g3;
    _panel_config->data_gpio_nums[1] = _g4;
    _panel_config->data_gpio_nums[2] = _g5;
    _panel_config->data_gpio_nums[3] = _r0;
    _panel_config->data_gpio_nums[4] = _r1;
    _panel_config->data_gpio_nums[5] = _r2;
    _panel_config->data_gpio_nums[6] = _r3;
    _panel_config->data_gpio_nums[7] = _r4;
    _panel_config->data_gpio_nums[8] = _b0;
    _panel_config->data_gpio_nums[9] = _b1;
    _panel_config->data_gpio_nums[10] = _b2;
    _panel_config->data_gpio_nums[11] = _b3;
    _panel_config->data_gpio_nums[12] = _b4;
    _panel_config->data_gpio_nums[13] = _g0;
    _panel_config->data_gpio_nums[14] = _g1;
    _panel_config->data_gpio_nums[15] = _g2;
  }
  else
  {
    _panel_config->data_gpio_nums[0] = _b0;
    _panel_config->data_gpio_nums[1] = _b1;
    _panel_config->data_gpio_nums[2] = _b2;
    _panel_config->data_gpio_nums[3] = _b3;
    _panel_config->data_gpio_nums[4] = _b4;
    _panel_config->data_gpio_nums[5] = _g0;
    _panel_config->data_gpio_nums[6] = _g1;
    _panel_config->data_gpio_nums[7] = _g2;
    _panel_config->data_gpio_nums[8] = _g3;
    _panel_config->data_gpio_nums[9] = _g4;
    _panel_config->data_gpio_nums[10] = _g5;
    _panel_config->data_gpio_nums[11] = _r0;
    _panel_config->data_gpio_nums[12] = _r1;
    _panel_config->data_gpio_nums[13] = _r2;
    _panel_config->data_gpio_nums[14] = _r3;
    _panel_config->data_gpio_nums[15] = _r4;
  }

  _panel_config->disp_gpio_num = GPIO_NUM_NC;

  _panel_config->flags.disp_active_low = 0;
  _panel_config->flags.relax_on_idle = 0;
  _panel_config->flags.fb_in_psram = 1; // allocate frame buffer in PSRAM

  ESP_ERROR_CHECK(esp_lcd_new_rgb_panel(_panel_config, &_panel_handle));
  ESP_ERROR_CHECK(esp_lcd_panel_reset(_panel_handle));
  ESP_ERROR_CHECK(esp_lcd_panel_init(_panel_handle));

  uint16_t color = random(0xffff);
  ESP_ERROR_CHECK(_panel_handle->draw_bitmap(_panel_handle, 0, 0, 1, 1, &color));

  _rgb_panel = __containerof(_panel_handle, esp_rgb_panel_t, base);

  LCD_CAM.lcd_ctrl2.lcd_vsync_idle_pol = _vsync_polarity;
  LCD_CAM.lcd_ctrl2.lcd_hsync_idle_pol = _hsync_polarity;

  return (uint16_t *)_rgb_panel->fb;
}
#endif // #if (ESP_ARDUINO_VERSION_MAJOR < 3)
#endif // #if defined(ESP32) && (CONFIG_IDF_TARGET_ESP32S3)