Commit 8f02e62d authored by Knut Aldrin's avatar Knut Aldrin
Browse files

Ignore unsupported status bytes and messages to other channels

parent c7dd7830

TeslaMidi/MIDI.c

+65 −45
Original line number Diff line number Diff line
@@ -28,7 +28,8 @@ uint8_t midi_current_byte; 
enum {

	FREE,

	NOTE_ON,

	NOTE_OFF

	NOTE_OFF,

	IGNORE

} midi_state;



void midi_init(uint8_t channel, note_t* notes_struct, midi_channel_t* channel_struct)
@@ -53,20 +54,35 @@ void midi_init(uint8_t channel, note_t* notes_struct, midi_channel_t* channel_st 
}



uint8_t parse_status( char input ) {

	// Status byte?

	if( input & MIDI_STATUS_bm ) {



		// Check that they want to speak to us

		if( ( input & MIDI_CHANNEL_MASK ) == midi_channel->channel ) {

      switch ( input & MIDI_STATUS_MASK ) {

			  case MIDI_note_off_gc:

			  	midi_state = NOTE_OFF;

			  	midi_current_byte = 0;

				return 1;

			  	break;



		  	case MIDI_note_on_gc:

		  		midi_state = NOTE_ON;

		  		midi_current_byte = 0;

				return 1;

		  		break;



        default:

          // Not supported yet

          midi_state = IGNORE;

          midi_current_byte = 0;

          break;

		  }

    }



		// No status

		// Return 1 cause we intercepted a status byte

		return 1;

	}

	else {

		// Not a status byte

		return 0;

	}

}
@@ -77,6 +93,7 @@ void parse_midi(char input) 
	switch (midi_state)

	{

		case FREE:

		case IGNORE:

			//check channel

			parse_status( input );

			break;
@@ -144,6 +161,9 @@ void parse_midi(char input) 


			break;



		default:

			// WTF? Unknown state

			tesla_panic();

	}



}