Switch from FastLED to Adafruit NeoPixel (more reliable on ESP32-S3 RMT)

include/pixel_stomp_mux.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include <cstdint>
-#include <FastLED.h>
+#include <Adafruit_NeoPixel.h>
 
 class PixelStompMux {
 public:
@@ -29,8 +29,6 @@ private:
     uint8_t pin_clk;
     uint8_t pin_di;
 
-    CRGB leds[NUM_LEDS];
+    Adafruit_NeoPixel strip;
     uint8_t last_button_state;
-
-    uint8_t shift_in_74hc165();
 };

platformio.ini

@@ -8,7 +8,7 @@ framework = arduino
 
 lib_deps =
     adafruit/Adafruit TinyUSB Library@^2.0.0
-    fastled/FastLED@^3.9.0
+    adafruit/Adafruit NeoPixel@^1.12.0
 
 build_flags =
     -DARDUINO_USB_MODE=1

src/led_stub.cpp

@@ -19,7 +19,7 @@ void DefaultLedStub::set_mux(PixelStompMux* mux) {
 }
 
 void DefaultLedStub::begin() {
-    Serial.println("[LED] Using WS2812C via PixelStomp MUX (FastLED)");
+    Serial.println("[LED] Using WS2812C via PixelStomp MUX (NeoPixel)");
     initialized = true;
 
     if (!mux_ptr) {

src/pixel_stomp_mux.cpp

@@ -5,6 +5,7 @@
 
 PixelStompMux::PixelStompMux(uint8_t dat, uint8_t ld, uint8_t clk, uint8_t di)
     : pin_dat(dat), pin_ld(ld), pin_clk(clk), pin_di(di),
+      strip(NUM_LEDS, dat, NEO_GRB + NEO_KHZ800),
       last_button_state(0) {
 }
 
@@ -18,11 +19,9 @@ void PixelStompMux::begin() {
 
     delay(100);
 
-    FastLED.addLeds<WS2812, 9, GRB>(leds, NUM_LEDS);
-    FastLED.setMaxPowerInVoltsAndMilliamps(5, 500);
-    FastLED.setBrightness(128);
-    fill_solid(leds, NUM_LEDS, CRGB::Black);
-    FastLED.show();
+    strip.begin();
+    strip.setBrightness(128);
+    strip.show();
 
     Serial.printf("[MUX] Init DAT=%d LD=%d CLK=%d DI=%d\n",
                   pin_dat, pin_ld, pin_clk, pin_di);
@@ -59,21 +58,23 @@ bool PixelStompMux::is_button_pressed(uint8_t index) {
 
 void PixelStompMux::set_led_color(uint8_t index, uint8_t r, uint8_t g, uint8_t b) {
     if (index >= NUM_LEDS) return;
-    leds[index] = CRGB(r, g, b);
+    strip.setPixelColor(index, r, g, b);
 }
 
 void PixelStompMux::set_led_brightness(uint8_t brightness) {
-    FastLED.setBrightness(brightness);
+    strip.setBrightness(brightness);
 }
 
 void PixelStompMux::clear_all() {
-    fill_solid(leds, NUM_LEDS, CRGB::Black);
-    FastLED.show();
+    for (int i = 0; i < NUM_LEDS; i++) {
+        strip.setPixelColor(i, 0, 0, 0);
+    }
+    strip.show();
     Serial.println("[MUX] LEDs cleared");
 }
 
 void PixelStompMux::show() {
-    FastLED.show();
+    strip.show();
 }
 
 void PixelStompMux::dump() {
@@ -91,7 +92,7 @@ void PixelStompMux::dump() {
 }
 
 void PixelStompMux::probe() {
-    Serial.println("[MUX] === Hardware Probe (BMC Protocol) ===");
+    Serial.println("[MUX] === Hardware Probe (NeoPixel) ===");
 
     for (int round = 0; round < 5; round++) {
         Serial.printf("--- Round %d ---\n", round);
@@ -122,12 +123,12 @@ void PixelStompMux::probe() {
     }
 
     Serial.println("  LED test: pixel 0 RED (max brightness)...");
-    leds[0] = CRGB(255, 0, 0);
-    FastLED.setBrightness(255);
-    FastLED.show();
+    strip.setBrightness(255);
+    strip.setPixelColor(0, 255, 0, 0);
+    strip.show();
     delay(2000);
-    leds[0] = CRGB::Black;
-    FastLED.show();
+    strip.setPixelColor(0, 0, 0, 0);
+    strip.show();
 
     Serial.println("[MUX] === Probe Complete ===");
 }