Refactor

app/fm.h

@@ -41,6 +41,7 @@ extern bool              gFM_FoundFrequency;
 extern uint16_t          gFM_RestoreCountdown_10ms;
 
 bool    FM_CheckValidChannel(uint8_t Channel);
+// returns first valid channel starting at Channel
 uint8_t FM_FindNextChannel(uint8_t Channel, uint8_t Direction);
 int     FM_ConfigureChannelState(void);
 void    FM_TurnOff(void);