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Diffstat (limited to 'protocol/lufa/midi/midi.c')
| -rwxr-xr-x | protocol/lufa/midi/midi.c | 277 |
1 files changed, 277 insertions, 0 deletions
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; +} + |