Neopixel fix (#8845)

* improve neopixel definition for all boards

* Improve NeoPixel definition for all boards

* neopixelWrite uses Peirpheral Manager now

The function can now be used for many GPIOs in the same sketch by using Peripheral Manager attach/detach, not being necesary to worry about initialization.

* improve error message

* check if pin is RGB_BUILTIN

* fixes boards that don't RGB_BUILTIN

cores/esp32/esp32-hal-rgb-led.c

@@ -3,34 +3,27 @@
 
 void neopixelWrite(uint8_t pin, uint8_t red_val, uint8_t green_val, uint8_t blue_val){
   rmt_data_t led_data[24];
-  static bool initialized = false;
 
-  uint8_t _pin = pin;
+  // Verify if the pin used is RGB_BUILTIN and fix GPIO number
 #ifdef RGB_BUILTIN
-  if(pin == RGB_BUILTIN){
-    _pin = RGB_BUILTIN - SOC_GPIO_PIN_COUNT;
-  }
+  pin = pin == RGB_BUILTIN ? pin - SOC_GPIO_PIN_COUNT : pin;
 #endif
-
-  if(!initialized){
-    if (!rmtInit(_pin, RMT_TX_MODE, RMT_MEM_NUM_BLOCKS_1, 10000000)){
-        log_e("RGB LED driver initialization failed!");
-        return;
-    }
-    initialized = true;
+  if (!rmtInit(pin, RMT_TX_MODE, RMT_MEM_NUM_BLOCKS_1, 10000000)) {
+    log_e("RGB LED driver initialization failed for GPIO%d!", pin);
+    return;
   }
 
   int color[] = {green_val, red_val, blue_val};  // Color coding is in order GREEN, RED, BLUE
   int i = 0;
-  for(int col=0; col<3; col++ ){
-    for(int bit=0; bit<8; bit++){
-      if((color[col] & (1<<(7-bit)))){
+  for (int col = 0; col < 3; col++ ) {
+    for (int bit = 0; bit < 8; bit++) {
+      if ((color[col] & (1 << (7 - bit)))) {
         // HIGH bit
         led_data[i].level0 = 1; // T1H
         led_data[i].duration0 = 8; // 0.8us
         led_data[i].level1 = 0; // T1L
         led_data[i].duration1 = 4; // 0.4us
-      }else{
+      } else {
         // LOW bit
         led_data[i].level0 = 1; // T0H
         led_data[i].duration0 = 4; // 0.4us
@@ -40,5 +33,5 @@ void neopixelWrite(uint8_t pin, uint8_t red_val, uint8_t green_val, uint8_t blue
       i++;
     }
   }
-  rmtWrite(_pin, led_data, RMT_SYMBOLS_OF(led_data), RMT_WAIT_FOR_EVER);
+  rmtWrite(pin, led_data, RMT_SYMBOLS_OF(led_data), RMT_WAIT_FOR_EVER);
 }

libraries/ESP32/examples/RMT/RMTWriteNeoPixel/RMTWriteNeoPixel.ino

@@ -19,15 +19,11 @@
  * Parameters can be changed by the user. In a single LED circuit, it will just blink.
  */
 
-// The effect seen in ESP32C3, ESP32S2 and ESP32S3 is like a Blink of RGB LED
-#if CONFIG_IDF_TARGET_ESP32S2
-#define BUILTIN_RGBLED_PIN   18
-#elif CONFIG_IDF_TARGET_ESP32S3
-#define BUILTIN_RGBLED_PIN   48  // 48 or 38
-#elif CONFIG_IDF_TARGET_ESP32C3
-#define BUILTIN_RGBLED_PIN   8
+// The effect seen in (Espressif devkits) ESP32C6, ESP32H2, ESP32C3, ESP32S2 and ESP32S3 is like a Blink of RGB LED
+#ifdef PIN_NEOPIXEL
+#define BUILTIN_RGBLED_PIN   PIN_NEOPIXEL
 #else
-#define BUILTIN_RGBLED_PIN   21   // ESP32 has no builtin RGB LED
+#define BUILTIN_RGBLED_PIN   21   // ESP32 has no builtin RGB LED (PIN_NEOPIXEL)
 #endif
 
 #define NR_OF_LEDS   8*4

libraries/ESP32/examples/RMT/RMT_CPUFreq_Test/RMT_CPUFreq_Test.ino

@@ -26,14 +26,11 @@
 
 
 // Default DevKit RGB LED GPIOs:
-#if CONFIG_IDF_TARGET_ESP32S2
-#define MY_LED_GPIO   18
-#elif CONFIG_IDF_TARGET_ESP32S3
-#define MY_LED_GPIO   48  // 48 or 38
-#elif CONFIG_IDF_TARGET_ESP32C3
-#define MY_LED_GPIO   8
+// The effect seen in (Espressif devkits) ESP32C6, ESP32H2, ESP32C3, ESP32S2 and ESP32S3 is like a Blink of RGB LED
+#ifdef PIN_NEOPIXEL
+#define MY_LED_GPIO   PIN_NEOPIXEL
 #else
-#define MY_LED_GPIO   21   // Any, ESP32 has no RGB LED - depends on circuit setup
+#define MY_LED_GPIO   21   // ESP32 has no builtin RGB LED (PIN_NEOPIXEL)
 #endif
 
 // Set the correct GPIO to any necessary by changing RGB_LED_GPIO value