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NeoPixel/neoPixel.c

+#include <stdio.h>
+#include <stdlib.h>
+
+#include "pico/stdlib.h"
+#include "hardware/pio.h"
+#include "hardware/clocks.h"
+#include "ws2812.pio.h"
+
+#define GPIO 28
+
+static inline void setPixel(uint32_t pixel_grb) {
+    pio_sm_put_blocking(pio0, 0, pixel_grb * 256);
+}
+
+void rgbFade() {
+    for(int i = 0; i <256; i++){
+        setPixel((32*256*256*256) + (256*256*(i))+(256*(0))+(255-i));
+        sleep_ms(100);
+    }
+    for(int i = 0; i <256; i++){
+        setPixel((32*256*256*256) + (256*256*(255-i))+(256*(i))+(0));
+        sleep_ms(100);
+    }
+        for(int i = 0; i <256; i++){
+        setPixel((32*256*256*256) + (256*256*(0))+(256*(255-0))+(i));
+        sleep_ms(100);
+    }
+}
+
+int main() {
+    stdio_init_all();
+    uint offset = pio_add_program(pio0, &ws2812_program);
+    ws2812_program_init(pio0, 0, offset, GPIO, 800000, true);
+    while (1) {
+            rgbFade();
+    }
+}