Implement Uart RX functionality. UART RX works. DMX frame detection not yet implemented.

firmware/include/ring-light/dmx.h

@@ -1,4 +1,43 @@
 #ifndef _DMX_H_
 #define _DMX_H_
 
+
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define DMX_UNIVERSE_SIZE (255u)
+#define DMX_USED_CHANNEL_COUNT (129u)
+
+/**
+ * @brief Init DMX reception
+ *
+ * DMX data is received from the base channel onwards:
+ * - R LED1
+ * - G LED1
+ * - B LED1
+ * - W LED1
+ * - R LED2
+ * ...
+ * - W LED32
+ * - W DISCRETE
+ *
+ * In Sum: 129 8 bit channels
+ *
+ * @param base_channel Base channel the ring light will listen on
+ */
+void dmx_init(uint32_t base_channel);
+
+/**
+ * @brief Has new DMX data been received?
+ * @return true if new data is available
+ */
+bool dmx_new_data_available(void);
+
+/**
+ * @brief Returns the array of the 129 DMX channels
+ * @return
+ */
+const uint8_t *dmx_get_data(void);
+
 #endif /* _DMX_H_ */