1 files changed, 20 insertions, 0 deletions
diff --git a/src/ws2812.h b/src/ws2812.h
new file mode 100644
index 0000000..3a0cf5c
--- /dev/null
+++ b/src/ws2812.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include "hardware/pio.h"
+#include "hardware/gpio.h"
+
+#include <stdbool.h>
+
+#define _WS2812_U8(v, s) (((uint32_t) (v) & 0xFF) << s)
+#define WS2812_U32RGB(r, g, b) \
+	(_WS2812_U8(b, 0) | _WS2812_U8(r, 8) | _WS2812_U8(g, 16))
+
+struct ws2812 {
+	PIO pio;
+	uint sm;
+	uint pin;
+	bool init;
+};
+
+void ws2812_init(struct ws2812 *pix, PIO pio, uint pin);
+void ws2812_put(struct ws2812 *pix, uint32_t rgb);