Implement first draft of working DMX. Still needs rework and beatifying

firmware/include/ring-light/dmx.h

@@ -34,4 +34,16 @@ void dmx_init(uint32_t base_channel);
  */
 const uint8_t *dmx_get_data(void);
 
+/**
+ * @brief Check if a break was received. This resets the flag
+ * @return true if a break was received since the last time calling this function
+ */
+bool dmx_poll_break_received(void);
+
+/**
+ * @brief The DMX receiver has received all data for the ring light. It can be read
+ * @return
+ */
+bool dmx_enough_data_received(void);
+
 #endif /* _DMX_H_ */