Add rawled bit-bang command, restore FastLED

include/pixel_stomp_mux.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include <cstdint>
-#include <Adafruit_NeoPixel.h>
+#include <FastLED.h>
 
 class PixelStompMux {
 public:
@@ -23,12 +23,11 @@ public:
     void dump();
     void probe();
 
-private:
     uint8_t pin_dat;
     uint8_t pin_ld;
     uint8_t pin_clk;
     uint8_t pin_di;
 
-    Adafruit_NeoPixel strip;
+    CRGB leds[NUM_LEDS];
     uint8_t last_button_state;
 };

platformio.ini

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

src/main.cpp

@@ -121,6 +121,34 @@ void handle_serial_command(const String& cmd) {
         Serial.println("  red/green/blue - solid colour");
         Serial.println("  pixel0/pixel1 - single pixel test");
         Serial.println("  gpiotest - raw GPIO pin diagnostic");
+        Serial.println("  rawled   - bit-bang WS2812 (no library)");
+    } else if (cmd == "rawled") {
+        uint8_t pin = 9;
+        Serial.println("[CMD] Bit-bang WS2812: pixel 0 = RED on GPIO 9");
+        uint32_t colour = 0x00FF00;
+        noInterrupts();
+        for (int i = 0; i < 24; i++) {
+            if (colour & (1 << (23 - i))) {
+                digitalWrite(pin, HIGH);
+                esp_rom_delay_us(800);
+                digitalWrite(pin, LOW);
+                esp_rom_delay_us(450);
+            } else {
+                digitalWrite(pin, HIGH);
+                esp_rom_delay_us(400);
+                digitalWrite(pin, LOW);
+                esp_rom_delay_us(850);
+            }
+        }
+        for (int i = 0; i < 7; i++) {
+            digitalWrite(pin, LOW);
+            esp_rom_delay_us(50);
+        }
+        interrupts();
+        Serial.println("[CMD] Sent. Wait 2 sec...");
+        delay(2000);
+        digitalWrite(pin, LOW);
+        Serial.println("[CMD] Done");
     } else {
         Serial.println("[CMD] Unknown command. Type 'help'");
     }

src/pixel_stomp_mux.cpp

@@ -5,7 +5,6 @@
 
 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) {
 }
 
@@ -19,9 +18,10 @@ void PixelStompMux::begin() {
 
     delay(100);
 
-    strip.begin();
-    strip.setBrightness(128);
-    strip.show();
+    FastLED.addLeds<WS2812, 9, GRB>(leds, NUM_LEDS);
+    FastLED.setBrightness(128);
+    fill_solid(leds, NUM_LEDS, CRGB::Black);
+    FastLED.show();
 
     Serial.printf("[MUX] Init DAT=%d LD=%d CLK=%d DI=%d\n",
                   pin_dat, pin_ld, pin_clk, pin_di);
@@ -58,23 +58,21 @@ 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;
-    strip.setPixelColor(index, r, g, b);
+    leds[index] = CRGB(r, g, b);
 }
 
 void PixelStompMux::set_led_brightness(uint8_t brightness) {
-    strip.setBrightness(brightness);
+    FastLED.setBrightness(brightness);
 }
 
 void PixelStompMux::clear_all() {
-    for (int i = 0; i < NUM_LEDS; i++) {
-        strip.setPixelColor(i, 0, 0, 0);
-    }
-    strip.show();
+    fill_solid(leds, NUM_LEDS, CRGB::Black);
+    FastLED.show();
     Serial.println("[MUX] LEDs cleared");
 }
 
 void PixelStompMux::show() {
-    strip.show();
+    FastLED.show();
 }
 
 void PixelStompMux::dump() {
@@ -92,7 +90,7 @@ void PixelStompMux::dump() {
 }
 
 void PixelStompMux::probe() {
-    Serial.println("[MUX] === Hardware Probe (NeoPixel) ===");
+    Serial.println("[MUX] === Hardware Probe ===");
 
     for (int round = 0; round < 5; round++) {
         Serial.printf("--- Round %d ---\n", round);
@@ -123,12 +121,12 @@ void PixelStompMux::probe() {
     }
 
     Serial.println("  LED test: pixel 0 RED (max brightness)...");
-    strip.setBrightness(255);
-    strip.setPixelColor(0, 255, 0, 0);
-    strip.show();
+    leds[0] = CRGB(255, 0, 0);
+    FastLED.setBrightness(255);
+    FastLED.show();
     delay(2000);
-    strip.setPixelColor(0, 0, 0, 0);
-    strip.show();
+    leds[0] = CRGB::Black;
+    FastLED.show();
 
     Serial.println("[MUX] === Probe Complete ===");
 }