From fb4fe52c0a5be527e6c9bfa006a5fb3ea79b4b0e Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Thu, 20 Aug 2015 00:42:28 -0400
Subject: midi
---
protocol/lufa/midi/midi.c | 277 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 277 insertions(+)
create mode 100755 protocol/lufa/midi/midi.c
(limited to 'protocol/lufa/midi/midi.c')
diff --git a/protocol/lufa/midi/midi.c b/protocol/lufa/midi/midi.c
new file mode 100755
index 000000000..11a589078
--- /dev/null
+++ b/protocol/lufa/midi/midi.c
@@ -0,0 +1,277 @@
+//midi for embedded chips,
+//Copyright 2010 Alex Norman
+//
+//This file is part of avr-midi.
+//
+//avr-midi is free software: you can redistribute it and/or modify
+//it under the terms of the GNU General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+//
+//avr-midi is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+//GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License
+//along with avr-midi. If not, see <http://www.gnu.org/licenses/>.
+
+#include "midi.h"
+#include <string.h> //for memcpy
+
+#define MIN(x,y) (((x) < (y)) ? (x) : (y))
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+bool midi_is_statusbyte(uint8_t theByte){
+ return (bool)(theByte & MIDI_STATUSMASK);
+}
+
+bool midi_is_realtime(uint8_t theByte){
+ return (theByte >= MIDI_CLOCK);
+}
+
+midi_packet_length_t midi_packet_length(uint8_t status){
+ switch(status & 0xF0){
+ case MIDI_CC:
+ case MIDI_NOTEON:
+ case MIDI_NOTEOFF:
+ case MIDI_AFTERTOUCH:
+ case MIDI_PITCHBEND:
+ return THREE;
+ case MIDI_PROGCHANGE:
+ case MIDI_CHANPRESSURE:
+ case MIDI_SONGSELECT:
+ return TWO;
+ case 0xF0:
+ switch(status) {
+ case MIDI_CLOCK:
+ case MIDI_TICK:
+ case MIDI_START:
+ case MIDI_CONTINUE:
+ case MIDI_STOP:
+ case MIDI_ACTIVESENSE:
+ case MIDI_RESET:
+ case MIDI_TUNEREQUEST:
+ return ONE;
+ case MIDI_SONGPOSITION:
+ return THREE;
+ case MIDI_TC_QUARTERFRAME:
+ case MIDI_SONGSELECT:
+ return TWO;
+ case SYSEX_END:
+ case SYSEX_BEGIN:
+ default:
+ return UNDEFINED;
+ }
+ default:
+ return UNDEFINED;
+ }
+}
+
+void midi_send_cc(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t val){
+ //CC Status: 0xB0 to 0xBF where the low nibble is the MIDI channel.
+ //CC Data: Controller Num, Controller Val
+ device->send_func(device, 3,
+ MIDI_CC | (chan & MIDI_CHANMASK),
+ num & 0x7F,
+ val & 0x7F);
+}
+
+void midi_send_noteon(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t vel){
+ //Note Data: Note Num, Note Velocity
+ device->send_func(device, 3,
+ MIDI_NOTEON | (chan & MIDI_CHANMASK),
+ num & 0x7F,
+ vel & 0x7F);
+}
+
+void midi_send_noteoff(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t vel){
+ //Note Data: Note Num, Note Velocity
+ device->send_func(device, 3,
+ MIDI_NOTEOFF | (chan & MIDI_CHANMASK),
+ num & 0x7F,
+ vel & 0x7F);
+}
+
+void midi_send_aftertouch(MidiDevice * device, uint8_t chan, uint8_t note_num, uint8_t amt){
+ device->send_func(device, 3,
+ MIDI_AFTERTOUCH | (chan & MIDI_CHANMASK),
+ note_num & 0x7F,
+ amt & 0x7F);
+}
+
+//XXX does this work right?
+//amt in range -0x2000, 0x1fff
+//uAmt should be in range..
+//0x0000 to 0x3FFF
+void midi_send_pitchbend(MidiDevice * device, uint8_t chan, int16_t amt){
+ uint16_t uAmt;
+ //check range
+ if(amt > 0x1fff){
+ uAmt = 0x3FFF;
+ } else if(amt < -0x2000){
+ uAmt = 0;
+ } else {
+ uAmt = amt + 0x2000;
+ }
+ device->send_func(device, 3,
+ MIDI_PITCHBEND | (chan & MIDI_CHANMASK),
+ uAmt & 0x7F,
+ (uAmt >> 7) & 0x7F);
+}
+
+void midi_send_programchange(MidiDevice * device, uint8_t chan, uint8_t num){
+ device->send_func(device, 2,
+ MIDI_PROGCHANGE | (chan & MIDI_CHANMASK),
+ num & 0x7F,
+ 0);
+}
+
+void midi_send_channelpressure(MidiDevice * device, uint8_t chan, uint8_t amt){
+ device->send_func(device, 2,
+ MIDI_CHANPRESSURE | (chan & MIDI_CHANMASK),
+ amt & 0x7F,
+ 0);
+}
+
+void midi_send_clock(MidiDevice * device){
+ device->send_func(device, 1, MIDI_CLOCK, 0, 0);
+}
+
+void midi_send_tick(MidiDevice * device){
+ device->send_func(device, 1, MIDI_TICK, 0, 0);
+}
+
+void midi_send_start(MidiDevice * device){
+ device->send_func(device, 1, MIDI_START, 0, 0);
+}
+
+void midi_send_continue(MidiDevice * device){
+ device->send_func(device, 1, MIDI_CONTINUE, 0, 0);
+}
+
+void midi_send_stop(MidiDevice * device){
+ device->send_func(device, 1, MIDI_STOP, 0, 0);
+}
+
+void midi_send_activesense(MidiDevice * device){
+ device->send_func(device, 1, MIDI_ACTIVESENSE, 0, 0);
+}
+
+void midi_send_reset(MidiDevice * device){
+ device->send_func(device, 1, MIDI_RESET, 0, 0);
+}
+
+void midi_send_tcquarterframe(MidiDevice * device, uint8_t time){
+ device->send_func(device, 2,
+ MIDI_TC_QUARTERFRAME,
+ time & 0x7F,
+ 0);
+}
+
+//XXX is this right?
+void midi_send_songposition(MidiDevice * device, uint16_t pos){
+ device->send_func(device, 3,
+ MIDI_SONGPOSITION,
+ pos & 0x7F,
+ (pos >> 7) & 0x7F);
+}
+
+void midi_send_songselect(MidiDevice * device, uint8_t song){
+ device->send_func(device, 2,
+ MIDI_SONGSELECT,
+ song & 0x7F,
+ 0);
+}
+
+void midi_send_tunerequest(MidiDevice * device){
+ device->send_func(device, 1, MIDI_TUNEREQUEST, 0, 0);
+}
+
+void midi_send_byte(MidiDevice * device, uint8_t b){
+ device->send_func(device, 1, b, 0, 0);
+}
+
+void midi_send_data(MidiDevice * device, uint16_t count, uint8_t byte0, uint8_t byte1, uint8_t byte2){
+ //ensure that the count passed along is always 3 or lower
+ if (count > 3) {
+ //TODO how to do this correctly?
+ }
+ device->send_func(device, count, byte0, byte1, byte2);
+}
+
+void midi_send_array(MidiDevice * device, uint16_t count, uint8_t * array) {
+ uint16_t i;
+ for (i = 0; i < count; i += 3) {
+ uint8_t b[3] = { 0, 0, 0 };
+ uint16_t to_send = count - i;
+ to_send = (to_send > 3) ? 3 : to_send;
+ memcpy(b, array + i, to_send);
+ midi_send_data(device, to_send, b[0], b[1], b[2]);
+ }
+}
+
+
+void midi_register_cc_callback(MidiDevice * device, midi_three_byte_func_t func){
+ device->input_cc_callback = func;
+}
+
+void midi_register_noteon_callback(MidiDevice * device, midi_three_byte_func_t func){
+ device->input_noteon_callback = func;
+}
+
+void midi_register_noteoff_callback(MidiDevice * device, midi_three_byte_func_t func){
+ device->input_noteoff_callback = func;
+}
+
+void midi_register_aftertouch_callback(MidiDevice * device, midi_three_byte_func_t func){
+ device->input_aftertouch_callback = func;
+}
+
+void midi_register_pitchbend_callback(MidiDevice * device, midi_three_byte_func_t func){
+ device->input_pitchbend_callback = func;
+}
+
+void midi_register_songposition_callback(MidiDevice * device, midi_three_byte_func_t func){
+ device->input_songposition_callback = func;
+}
+
+void midi_register_progchange_callback(MidiDevice * device, midi_two_byte_func_t func) {
+ device->input_progchange_callback = func;
+}
+
+void midi_register_chanpressure_callback(MidiDevice * device, midi_two_byte_func_t func) {
+ device->input_chanpressure_callback = func;
+}
+
+void midi_register_songselect_callback(MidiDevice * device, midi_two_byte_func_t func) {
+ device->input_songselect_callback = func;
+}
+
+void midi_register_tc_quarterframe_callback(MidiDevice * device, midi_two_byte_func_t func) {
+ device->input_tc_quarterframe_callback = func;
+}
+
+void midi_register_realtime_callback(MidiDevice * device, midi_one_byte_func_t func){
+ device->input_realtime_callback = func;
+}
+
+void midi_register_tunerequest_callback(MidiDevice * device, midi_one_byte_func_t func){
+ device->input_tunerequest_callback = func;
+}
+
+void midi_register_sysex_callback(MidiDevice * device, midi_sysex_func_t func) {
+ device->input_sysex_callback = func;
+}
+
+void midi_register_fallthrough_callback(MidiDevice * device, midi_var_byte_func_t func){
+ device->input_fallthrough_callback = func;
+}
+
+void midi_register_catchall_callback(MidiDevice * device, midi_var_byte_func_t func){
+ device->input_catchall_callback = func;
+}
+
--
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