qmk_firmware

QMK firmware for my keyboards (Corne, Sweep Ferris) and trackball (Ploopy Adept)
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midi.c (7949B)

      1 // midi for embedded chips,
      2 // Copyright 2010 Alex Norman
      3 //
      4 // This file is part of avr-midi.
      5 //
      6 // avr-midi is free software: you can redistribute it and/or modify
      7 // it under the terms of the GNU General Public License as published by
      8 // the Free Software Foundation, either version 3 of the License, or
      9 //(at your option) any later version.
     10 //
     11 // avr-midi is distributed in the hope that it will be useful,
     12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 // GNU General Public License for more details.
     15 //
     16 // You should have received a copy of the GNU General Public License
     17 // along with avr-midi.  If not, see <http://www.gnu.org/licenses/>.
     18 
     19 #include "midi.h"
     20 #include <string.h> //for memcpy
     21 #include "util.h"
     22 
     23 #ifndef NULL
     24 #    define NULL 0
     25 #endif
     26 
     27 bool midi_is_statusbyte(uint8_t theByte) {
     28     return (bool)(theByte & MIDI_STATUSMASK);
     29 }
     30 
     31 bool midi_is_realtime(uint8_t theByte) {
     32     return (theByte >= MIDI_CLOCK);
     33 }
     34 
     35 midi_packet_length_t midi_packet_length(uint8_t status) {
     36     switch (status & 0xF0) {
     37         case MIDI_CC:
     38         case MIDI_NOTEON:
     39         case MIDI_NOTEOFF:
     40         case MIDI_AFTERTOUCH:
     41         case MIDI_PITCHBEND:
     42             return THREE;
     43         case MIDI_PROGCHANGE:
     44         case MIDI_CHANPRESSURE:
     45         case MIDI_SONGSELECT:
     46             return TWO;
     47         case 0xF0:
     48             switch (status) {
     49                 case MIDI_CLOCK:
     50                 case MIDI_TICK:
     51                 case MIDI_START:
     52                 case MIDI_CONTINUE:
     53                 case MIDI_STOP:
     54                 case MIDI_ACTIVESENSE:
     55                 case MIDI_RESET:
     56                 case MIDI_TUNEREQUEST:
     57                     return ONE;
     58                 case MIDI_SONGPOSITION:
     59                     return THREE;
     60                 case MIDI_TC_QUARTERFRAME:
     61                 case MIDI_SONGSELECT:
     62                     return TWO;
     63                 case SYSEX_END:
     64                 case SYSEX_BEGIN:
     65                 default:
     66                     return UNDEFINED;
     67             }
     68         default:
     69             return UNDEFINED;
     70     }
     71 }
     72 
     73 void midi_send_cc(MidiDevice* device, uint8_t chan, uint8_t num, uint8_t val) {
     74     // CC Status: 0xB0 to 0xBF where the low nibble is the MIDI channel.
     75     // CC Data: Controller Num, Controller Val
     76     device->send_func(device, 3, MIDI_CC | (chan & MIDI_CHANMASK), num & 0x7F, val & 0x7F);
     77 }
     78 
     79 void midi_send_noteon(MidiDevice* device, uint8_t chan, uint8_t num, uint8_t vel) {
     80     // Note Data: Note Num, Note Velocity
     81     device->send_func(device, 3, MIDI_NOTEON | (chan & MIDI_CHANMASK), num & 0x7F, vel & 0x7F);
     82 }
     83 
     84 void midi_send_noteoff(MidiDevice* device, uint8_t chan, uint8_t num, uint8_t vel) {
     85     // Note Data: Note Num, Note Velocity
     86     device->send_func(device, 3, MIDI_NOTEOFF | (chan & MIDI_CHANMASK), num & 0x7F, vel & 0x7F);
     87 }
     88 
     89 void midi_send_aftertouch(MidiDevice* device, uint8_t chan, uint8_t note_num, uint8_t amt) {
     90     device->send_func(device, 3, MIDI_AFTERTOUCH | (chan & MIDI_CHANMASK), note_num & 0x7F, amt & 0x7F);
     91 }
     92 
     93 // XXX does this work right?
     94 // amt in range -0x2000, 0x1fff
     95 // uAmt should be in range..
     96 // 0x0000 to 0x3FFF
     97 void midi_send_pitchbend(MidiDevice* device, uint8_t chan, int16_t amt) {
     98     uint16_t uAmt;
     99     // check range
    100     if (amt > 0x1fff) {
    101         uAmt = 0x3FFF;
    102     } else if (amt < -0x2000) {
    103         uAmt = 0;
    104     } else {
    105         uAmt = amt + 0x2000;
    106     }
    107     device->send_func(device, 3, MIDI_PITCHBEND | (chan & MIDI_CHANMASK), uAmt & 0x7F, (uAmt >> 7) & 0x7F);
    108 }
    109 
    110 void midi_send_programchange(MidiDevice* device, uint8_t chan, uint8_t num) {
    111     device->send_func(device, 2, MIDI_PROGCHANGE | (chan & MIDI_CHANMASK), num & 0x7F, 0);
    112 }
    113 
    114 void midi_send_channelpressure(MidiDevice* device, uint8_t chan, uint8_t amt) {
    115     device->send_func(device, 2, MIDI_CHANPRESSURE | (chan & MIDI_CHANMASK), amt & 0x7F, 0);
    116 }
    117 
    118 void midi_send_clock(MidiDevice* device) {
    119     device->send_func(device, 1, MIDI_CLOCK, 0, 0);
    120 }
    121 
    122 void midi_send_tick(MidiDevice* device) {
    123     device->send_func(device, 1, MIDI_TICK, 0, 0);
    124 }
    125 
    126 void midi_send_start(MidiDevice* device) {
    127     device->send_func(device, 1, MIDI_START, 0, 0);
    128 }
    129 
    130 void midi_send_continue(MidiDevice* device) {
    131     device->send_func(device, 1, MIDI_CONTINUE, 0, 0);
    132 }
    133 
    134 void midi_send_stop(MidiDevice* device) {
    135     device->send_func(device, 1, MIDI_STOP, 0, 0);
    136 }
    137 
    138 void midi_send_activesense(MidiDevice* device) {
    139     device->send_func(device, 1, MIDI_ACTIVESENSE, 0, 0);
    140 }
    141 
    142 void midi_send_reset(MidiDevice* device) {
    143     device->send_func(device, 1, MIDI_RESET, 0, 0);
    144 }
    145 
    146 void midi_send_tcquarterframe(MidiDevice* device, uint8_t time) {
    147     device->send_func(device, 2, MIDI_TC_QUARTERFRAME, time & 0x7F, 0);
    148 }
    149 
    150 // XXX is this right?
    151 void midi_send_songposition(MidiDevice* device, uint16_t pos) {
    152     device->send_func(device, 3, MIDI_SONGPOSITION, pos & 0x7F, (pos >> 7) & 0x7F);
    153 }
    154 
    155 void midi_send_songselect(MidiDevice* device, uint8_t song) {
    156     device->send_func(device, 2, MIDI_SONGSELECT, song & 0x7F, 0);
    157 }
    158 
    159 void midi_send_tunerequest(MidiDevice* device) {
    160     device->send_func(device, 1, MIDI_TUNEREQUEST, 0, 0);
    161 }
    162 
    163 void midi_send_byte(MidiDevice* device, uint8_t b) {
    164     device->send_func(device, 1, b, 0, 0);
    165 }
    166 
    167 void midi_send_data(MidiDevice* device, uint16_t count, uint8_t byte0, uint8_t byte1, uint8_t byte2) {
    168     // ensure that the count passed along is always 3 or lower
    169     if (count > 3) {
    170         // TODO how to do this correctly?
    171     }
    172     device->send_func(device, count, byte0, byte1, byte2);
    173 }
    174 
    175 void midi_send_array(MidiDevice* device, uint16_t count, uint8_t* array) {
    176     uint16_t i;
    177     for (i = 0; i < count; i += 3) {
    178         uint8_t  b[3]    = {0, 0, 0};
    179         uint16_t to_send = count - i;
    180         to_send          = (to_send > 3) ? 3 : to_send;
    181         memcpy(b, array + i, to_send);
    182         midi_send_data(device, to_send, b[0], b[1], b[2]);
    183     }
    184 }
    185 
    186 void midi_register_cc_callback(MidiDevice* device, midi_three_byte_func_t func) {
    187     device->input_cc_callback = func;
    188 }
    189 
    190 void midi_register_noteon_callback(MidiDevice* device, midi_three_byte_func_t func) {
    191     device->input_noteon_callback = func;
    192 }
    193 
    194 void midi_register_noteoff_callback(MidiDevice* device, midi_three_byte_func_t func) {
    195     device->input_noteoff_callback = func;
    196 }
    197 
    198 void midi_register_aftertouch_callback(MidiDevice* device, midi_three_byte_func_t func) {
    199     device->input_aftertouch_callback = func;
    200 }
    201 
    202 void midi_register_pitchbend_callback(MidiDevice* device, midi_three_byte_func_t func) {
    203     device->input_pitchbend_callback = func;
    204 }
    205 
    206 void midi_register_songposition_callback(MidiDevice* device, midi_three_byte_func_t func) {
    207     device->input_songposition_callback = func;
    208 }
    209 
    210 void midi_register_progchange_callback(MidiDevice* device, midi_two_byte_func_t func) {
    211     device->input_progchange_callback = func;
    212 }
    213 
    214 void midi_register_chanpressure_callback(MidiDevice* device, midi_two_byte_func_t func) {
    215     device->input_chanpressure_callback = func;
    216 }
    217 
    218 void midi_register_songselect_callback(MidiDevice* device, midi_two_byte_func_t func) {
    219     device->input_songselect_callback = func;
    220 }
    221 
    222 void midi_register_tc_quarterframe_callback(MidiDevice* device, midi_two_byte_func_t func) {
    223     device->input_tc_quarterframe_callback = func;
    224 }
    225 
    226 void midi_register_realtime_callback(MidiDevice* device, midi_one_byte_func_t func) {
    227     device->input_realtime_callback = func;
    228 }
    229 
    230 void midi_register_tunerequest_callback(MidiDevice* device, midi_one_byte_func_t func) {
    231     device->input_tunerequest_callback = func;
    232 }
    233 
    234 void midi_register_sysex_callback(MidiDevice* device, midi_sysex_func_t func) {
    235     device->input_sysex_callback = func;
    236 }
    237 
    238 void midi_register_fallthrough_callback(MidiDevice* device, midi_var_byte_func_t func) {
    239     device->input_fallthrough_callback = func;
    240 }
    241 
    242 void midi_register_catchall_callback(MidiDevice* device, midi_var_byte_func_t func) {
    243     device->input_catchall_callback = func;
    244 }