waveshare_esp32s3_touch_lcd_43.h

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// 2026-02-14 19:00:00 v1.5.0 - Remove lazy init; let driver handle full reset.
#pragma once
 
#include "roo_display/hal/config.h"
 
#if !defined(ESP32) || !(CONFIG_IDF_TARGET_ESP32S3)
#warning Compilation target must be ESP32_S3 for this device.
#else
 
#include "roo_display/driver/esp32s3_dma_parallel_rgb565.h"
#include "roo_display/driver/touch_gt911.h"
#include "roo_display/hal/i2c.h"
#include "roo_display/products/combo_device.h"
 
namespace roo_display::products::waveshare
{
 
// Waveshare ESP32-S3 Touch LCD 4.3" device wrapper.
//
// GT911 reset is routed through a CH422G I/O expander (GpioSetter lambda).
// The INT pin has a hardware pull-down on the board, keeping it LOW during
// reset so the GT911 reliably selects I2C address 0x5D without software
// intervention.
class WaveshareEsp32s3TouchLcd43 : public ComboDevice {
 public:
  // Constructs the device without bus initialization.
  // Call initTransport() before use.
  WaveshareEsp32s3TouchLcd43(Orientation orientation = Orientation(),
                             I2cMasterBusHandle i2c = I2cMasterBusHandle());
 
  // Initializes PSRAM, I2C bus, and CH422G expander.
  bool initTransport();
 
  DisplayDevice& display() override;
  TouchDevice* touch() override;
  TouchCalibration touch_calibration() override;
 
  void setBacklight(bool on);
 
 private:
  void writeEXIO(uint8_t pin, bool state);
 
  I2cMasterBusHandle i2c_;
  I2cSlaveDevice ch422g_wr_set_;
  I2cSlaveDevice ch422g_wr_io_;
  esp32s3_dma::ParallelRgb565Buffered display_;
  TouchGt911 touch_;
  uint8_t exio_shadow_;
};
 
}  // namespace roo_display::products::waveshare
 
 
#endif  // ESP32 && CONFIG_IDF_TARGET_ESP32S3