Added support for Waveshare ESP32-S3-Touch-LCD-2 (#826)

Author: p43lz3r

src/lgfx_user/LGFX_ESP32_S3_Touch_LCD_2.h

@@ -0,0 +1,97 @@
+// 2026-02-16 13:00 v2.2.1
+//
+// LGFX_ESP32_S3_Touch_LCD_2.h
+//
+// LovyanGFX device configuration for Waveshare ESP32-S3-Touch-LCD-2.
+// Display: ST7789 240x320 IPS (SPI) | Touch: CST816S (I2C)
+// MCU:     ESP32-S3
+//
+// Compatible with both Arduino framework and ESP-IDF.
+
+#ifndef LGFX_ESP32_S3_TOUCH_LCD_2_H_
+#define LGFX_ESP32_S3_TOUCH_LCD_2_H_
+
+#include <LovyanGFX.hpp>
+
+class LGFX : public lgfx::LGFX_Device {
+  lgfx::Panel_ST7789 panel_instance_;
+  lgfx::Bus_SPI bus_instance_;
+  lgfx::Light_PWM light_instance_;
+  lgfx::Touch_CST816S touch_instance_;
+
+ public:
+  LGFX(void) {
+    // --- SPI bus ---
+    {
+      auto cfg = bus_instance_.config();
+      cfg.spi_host = SPI3_HOST;
+      cfg.spi_mode = 0;
+      cfg.freq_write = 40000000;    // 40 MHz write clock
+      cfg.freq_read = 16000000;     // 16 MHz read clock
+      cfg.spi_3wire = true;
+      cfg.use_lock = true;
+      cfg.dma_channel = SPI_DMA_CH_AUTO;
+      cfg.pin_sclk = 39;
+      cfg.pin_mosi = 38;
+      cfg.pin_miso = 40;
+      cfg.pin_dc = 42;
+      bus_instance_.config(cfg);
+      panel_instance_.setBus(&bus_instance_);
+    }
+
+    // --- Display panel ---
+    {
+      auto cfg = panel_instance_.config();
+      cfg.pin_cs = 45;
+      cfg.pin_rst = -1;              // Not connected
+      cfg.pin_busy = -1;             // Not used
+      cfg.panel_width = 240;
+      cfg.panel_height = 320;
+      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 = true;             // Required for IPS panel
+      cfg.rgb_order = false;         // RGB (not BGR)
+      cfg.dlen_16bit = false;
+      cfg.bus_shared = true;
+      panel_instance_.config(cfg);
+    }
+
+    // --- Backlight (PWM) ---
+    {
+      auto cfg = light_instance_.config();
+      cfg.pin_bl = 1;
+      cfg.invert = false;            // HIGH = bright
+      cfg.freq = 44100;
+      cfg.pwm_channel = 7;
+      light_instance_.config(cfg);
+      panel_instance_.setLight(&light_instance_);
+    }
+
+    // --- Touch (CST816S via I2C) ---
+    {
+      auto cfg = touch_instance_.config();
+      cfg.i2c_port = 0;
+      cfg.i2c_addr = 0x15;           // CST816S default address
+      cfg.pin_sda = 48;
+      cfg.pin_scl = 47;
+      cfg.pin_int = -1;              // Not connected
+      cfg.pin_rst = -1;              // Not connected
+      cfg.freq = 400000;             // 400 kHz I2C clock
+      cfg.x_min = 0;
+      cfg.x_max = 239;
+      cfg.y_min = 0;
+      cfg.y_max = 319;
+      cfg.offset_rotation = 0;
+      touch_instance_.config(cfg);
+      panel_instance_.setTouch(&touch_instance_);
+    }
+
+    setPanel(&panel_instance_);
+  }
+};
+
+#endif  // LGFX_ESP32_S3_TOUCH_LCD_2_H_