refactor(esp32-s3-lcd-43): remove IO expander and use LovyanGFX backlight

boards/esp32-s3-lcd-43/DisplayDriverGFX.cpp

@@ -1,51 +1,19 @@
+// boards/esp32-s3-lcd-43/DisplayDriverGFX.cpp
 #include <Arduino.h>
-#include <Wire.h>
-#include <ESP_IOExpander_Library.h>
 #include "LovyanPins.h"
 #include "board_config.h"
 #include "DisplayDriverGFX.h"
 
 // ── Globals ──
 static LGFX* _gfx = nullptr;
-static ESP_IOExpander* _expander = nullptr;
 
 // ── Forward declarations ──
-static void initExpander();
 static void initDisplay();
 
 // ── Dimensions ──
 static constexpr int DISP_W = 800;
 static constexpr int DISP_H = 480;
 
-// ── Expander initialization (from Westcott) ──
-static void initExpander() {
-    Serial.println("IO expander init...");
-    
-    // Initialize I2C for expander (port 0)
-    Wire.begin(TOUCH_SDA, TOUCH_SCL);
-    
-    _expander = new ESP_IOExpander_CH422G(
-        (i2c_port_t)I2C_NUM_0,
-        ESP_IO_EXPANDER_I2C_CH422G_ADDRESS
-    );
-    _expander->init();
-    _expander->begin();
-    
-    // Set all pins to output
-    _expander->multiPinMode(TP_RST | LCD_BL | LCD_RST | SD_CS | USB_SEL, OUTPUT);
-    
-    // Reset sequence for LCD
-    _expander->digitalWrite(LCD_RST, LOW);
-    delay(50);
-    _expander->digitalWrite(LCD_RST, HIGH);
-    delay(150);
-    
-    // Turn on backlight
-    _expander->digitalWrite(LCD_BL, HIGH);
-    
-    Serial.println("IO expander ready");
-}
-
 // ── Display initialization ──
 static void initDisplay() {
     Serial.println("LovyanGFX init...");
@@ -67,13 +35,13 @@ DisplayDriverGFX& DisplayDriverGFX::instance() {
 // ── IDisplayDriver implementation ──
 
 void DisplayDriverGFX::begin() {
-    initExpander();
     initDisplay();
 }
 
 void DisplayDriverGFX::setBacklight(bool on) {
-    if (_expander) {
+    if (_gfx) {
-        _expander->digitalWrite(LCD_BL, on ? HIGH : LOW);
+        // LovyanGFX handles backlight via setBrightness
+        _gfx->setBrightness(on ? 255 : 0);
     }
 }
 

mise.toml

@@ -7,7 +7,6 @@ description = "Install shared (platform-independent) libraries"
 run = """
 arduino-cli lib install "ArduinoJson@7.4.1"
 arduino-cli lib install "NTPClient@3.2.1"
-arduino-cli lib install "ESP32_IO_Expander@0.0.4"
 echo "[OK] Shared libraries installed"
 """
 
@@ -78,13 +77,12 @@ description = "Compile ESP32-32E sketch"
 depends = ["install-libs"]
 run = """
 arduino-cli compile \
-  --fqbn "esp32:esp32:waveshare_esp32_s3_touch_lcd_43:PSRAM=enabled,FlashSize=16M,USBMode=hwcdc,PartitionScheme=app3M_fat9M_16MB" \
+  --fqbn "esp32:esp32@2.0.11:esp32:FlashSize=4M,PartitionScheme=default" \
   --libraries ./libraries \
-  --libraries ./vendor/esp32-s3-lcd-43 \
+  --libraries ./vendor/esp32-32e/TFT_eSPI \
   --build-property "compiler.cpp.extra_flags=-DDEBUG_MODE -DBOARD_HAS_PSRAM" \
-  --build-property "build.extra_flags=-DCONFIG_ESP32S3_OLD_I2C_LEGACY_DEVICE_COMPAT_MODE=1" \
   --warnings default \
-  ./boards/esp32-s3-lcd-43
+  ./boards/esp32-32e
 """
 
 [tasks.upload-32e]
@@ -105,7 +103,7 @@ arduino-cli monitor --port "${PORT:-/dev/ttyUSB0}" --config baudrate=115200
 # ── ESP32-S3-LCD-4.3 ────────────────────────────────────
 
 [tasks.compile-s3-43]
-description = "Compile ESP32-S3-LCD-4.3 sketch"
+description = "Compile ESP32-S3-LCD-4.3 sketch (Core 2.x)"
 depends = ["install-libs"]
 run = """
 arduino-cli compile \