Public firmware release.

1 files changed, 49 insertions, 0 deletions

diff --git a/bootloader/midi/examples/serial_midi.c b/bootloader/midi/examples/serial_midi.c
new file mode 100644
index 0000000..49c57a6
--- /dev/null
+++ b/bootloader/midi/examples/serial_midi.c
@@ -0,0 +1,49 @@
+#include "serial_midi.h"
+#include <avr/interrupt.h>
+#include "stdlib.h"
+
+static MidiDevice midi_device;
+
+void serial_midi_send(MidiDevice * device, uint8_t cnt, uint8_t inByte0, uint8_t inByte1, uint8_t inByte2){
+   //we always send the first byte
+	while ( !(UCSRA & _BV(UDRE)) ); // Wait for empty transmit buffer
+	UDR = inByte0;
+   //if cnt == 2 or 3 we send the send byte
+   if(cnt > 1) {
+      while ( !(UCSRA & _BV(UDRE)) ); // Wait for empty transmit buffer
+      UDR = inByte1;
+   }
+   //if cnt == 3 we send the third byte
+   if(cnt == 3) {
+      while ( !(UCSRA & _BV(UDRE)) ); // Wait for empty transmit buffer
+      UDR = inByte2;
+   }
+}
+
+MidiDevice * serial_midi_device(void) {
+   return &midi_device;
+}
+
+MidiDevice* serial_midi_init(uint16_t clockScale, bool out, bool in){
+   //send up the device
+   midi_device_init(&midi_device);
+   midi_device_set_send_func(&midi_device, serial_midi_send);
+
+	// Set baud rate
+	UBRRH = (uint8_t)(clockScale >> 8);
+	UBRRL = (uint8_t)(clockScale & 0xFF);
+	// Enable transmitter
+	if(out)
+		UCSRB |= _BV(TXEN);
+	if(in) {
+		//Enable receiver
+		//RX Complete Interrupt Enable  (user must provide routine)
+		UCSRB |= _BV(RXEN) | _BV(RXCIE);
+	}
+	//Set frame format: Async, 8data, 1 stop bit, 1 start bit, no parity
+	//needs to have URSEL set in order to write into this reg
+	UCSRC = _BV(URSEL) | _BV(UCSZ1) | _BV(UCSZ0);
+
+   return serial_midi_device();
+}
+