ed15973a3f
satan/keymaps/midi
MIDI_ENABLE = no
text data bss dec hex filename
0 17080 0 17080 42b8 satan_midi.hex
MIDI_ENABLE = yes
#define MIDI_TONE_KEYCODE_OCTAVES 3 // default
text data bss dec hex filename
0 20846 0 20846 516e satan_midi.hex
MIDI_ENABLE = yes
#define MIDI_TONE_KEYCODE_OCTAVES 2 // fewer octaves
text data bss dec hex filename
0 20846 0 20846 516e satan_midi.hex
211 lines
7.8 KiB
C
211 lines
7.8 KiB
C
#define MIDI_TONE_KEYCODE_OCTAVES 2
|
|
|
|
#include "process_midi.h"
|
|
#include "timer.h"
|
|
|
|
static uint8_t tone_status[MIDI_TONE_COUNT];
|
|
|
|
static uint8_t midi_modulation;
|
|
static int8_t midi_modulation_step;
|
|
static uint16_t midi_modulation_timer;
|
|
|
|
inline uint8_t compute_velocity(uint8_t setting)
|
|
{
|
|
return (setting + 1) * (128 / (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN + 1));
|
|
}
|
|
|
|
void midi_init(void)
|
|
{
|
|
midi_config.octave = MI_OCT_2 - MIDI_OCTAVE_MIN;
|
|
midi_config.transpose = 0;
|
|
midi_config.velocity = (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN);
|
|
midi_config.channel = 0;
|
|
midi_config.modulation_interval = 8;
|
|
|
|
for (uint8_t i = 0; i < MIDI_TONE_COUNT; i++)
|
|
{
|
|
tone_status[i] = MIDI_INVALID_NOTE;
|
|
}
|
|
|
|
midi_modulation = 0;
|
|
midi_modulation_step = 0;
|
|
midi_modulation_timer = 0;
|
|
}
|
|
|
|
void midi_task(void)
|
|
{
|
|
if (timer_elapsed(midi_modulation_timer) < midi_config.modulation_interval)
|
|
return;
|
|
midi_modulation_timer = timer_read();
|
|
|
|
if (midi_modulation_step != 0)
|
|
{
|
|
dprintf("midi modulation %d\n", midi_modulation);
|
|
midi_send_cc(&midi_device, midi_config.channel, 0x1, midi_modulation);
|
|
|
|
if (midi_modulation_step < 0 && midi_modulation < -midi_modulation_step) {
|
|
midi_modulation = 0;
|
|
midi_modulation_step = 0;
|
|
return;
|
|
}
|
|
|
|
midi_modulation += midi_modulation_step;
|
|
|
|
if (midi_modulation > 127)
|
|
midi_modulation = 127;
|
|
}
|
|
}
|
|
|
|
uint8_t midi_compute_note(uint16_t keycode)
|
|
{
|
|
return 12 * midi_config.octave + (keycode - MIDI_TONE_MIN) + midi_config.transpose;
|
|
}
|
|
|
|
bool process_midi(uint16_t keycode, keyrecord_t *record)
|
|
{
|
|
switch (keycode) {
|
|
case MIDI_TONE_MIN ... MIDI_TONE_MAX:
|
|
{
|
|
uint8_t channel = midi_config.channel;
|
|
uint8_t tone = keycode - MIDI_TONE_MIN;
|
|
uint8_t velocity = compute_velocity(midi_config.velocity);
|
|
if (record->event.pressed) {
|
|
uint8_t note = midi_compute_note(keycode);
|
|
midi_send_noteon(&midi_device, channel, note, velocity);
|
|
dprintf("midi noteon channel:%d note:%d velocity:%d\n", channel, note, velocity);
|
|
tone_status[tone] = note;
|
|
}
|
|
else {
|
|
uint8_t note = tone_status[tone];
|
|
if (note != MIDI_INVALID_NOTE)
|
|
{
|
|
midi_send_noteoff(&midi_device, channel, note, velocity);
|
|
dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity);
|
|
}
|
|
tone_status[tone] = MIDI_INVALID_NOTE;
|
|
}
|
|
return false;
|
|
}
|
|
case MIDI_OCTAVE_MIN ... MIDI_OCTAVE_MAX:
|
|
if (record->event.pressed) {
|
|
midi_config.octave = keycode - MIDI_OCTAVE_MIN;
|
|
dprintf("midi octave %d\n", midi_config.octave);
|
|
}
|
|
return false;
|
|
case MI_OCTD:
|
|
if (record->event.pressed && midi_config.octave > 0) {
|
|
midi_config.octave--;
|
|
dprintf("midi octave %d\n", midi_config.octave);
|
|
}
|
|
return false;
|
|
case MI_OCTU:
|
|
if (record->event.pressed && midi_config.octave < (MIDI_OCTAVE_MAX - MIDI_OCTAVE_MIN)) {
|
|
midi_config.octave++;
|
|
dprintf("midi octave %d\n", midi_config.octave);
|
|
}
|
|
return false;
|
|
case MIDI_TRANSPOSE_MIN ... MIDI_TRANSPOSE_MAX:
|
|
if (record->event.pressed) {
|
|
midi_config.transpose = keycode - MI_TRNS_0;
|
|
dprintf("midi transpose %d\n", midi_config.transpose);
|
|
}
|
|
return false;
|
|
case MI_TRNSD:
|
|
if (record->event.pressed && midi_config.transpose > (MIDI_TRANSPOSE_MIN - MI_TRNS_0)) {
|
|
midi_config.transpose--;
|
|
dprintf("midi transpose %d\n", midi_config.transpose);
|
|
}
|
|
return false;
|
|
case MI_TRNSU:
|
|
if (record->event.pressed && midi_config.transpose < (MIDI_TRANSPOSE_MAX - MI_TRNS_0)) {
|
|
const bool positive = midi_config.transpose > 0;
|
|
midi_config.transpose++;
|
|
if (positive && midi_config.transpose < 0)
|
|
midi_config.transpose--;
|
|
dprintf("midi transpose %d\n", midi_config.transpose);
|
|
}
|
|
return false;
|
|
case MIDI_VELOCITY_MIN ... MIDI_VELOCITY_MAX:
|
|
if (record->event.pressed) {
|
|
midi_config.velocity = keycode - MIDI_VELOCITY_MIN;
|
|
dprintf("midi velocity %d\n", midi_config.velocity);
|
|
}
|
|
return false;
|
|
case MI_VELD:
|
|
if (record->event.pressed && midi_config.velocity > 0) {
|
|
midi_config.velocity--;
|
|
dprintf("midi velocity %d\n", midi_config.velocity);
|
|
}
|
|
return false;
|
|
case MI_VELU:
|
|
if (record->event.pressed) {
|
|
midi_config.velocity++;
|
|
dprintf("midi velocity %d\n", midi_config.velocity);
|
|
}
|
|
return false;
|
|
case MIDI_CHANNEL_MIN ... MIDI_CHANNEL_MAX:
|
|
if (record->event.pressed) {
|
|
midi_config.channel = keycode - MIDI_CHANNEL_MIN;
|
|
dprintf("midi channel %d\n", midi_config.channel);
|
|
}
|
|
return false;
|
|
case MI_CHD:
|
|
if (record->event.pressed) {
|
|
midi_config.channel--;
|
|
dprintf("midi channel %d\n", midi_config.channel);
|
|
}
|
|
return false;
|
|
case MI_CHU:
|
|
if (record->event.pressed) {
|
|
midi_config.channel++;
|
|
dprintf("midi channel %d\n", midi_config.channel);
|
|
}
|
|
return false;
|
|
case MI_OFF:
|
|
if (record->event.pressed) {
|
|
midi_send_cc(&midi_device, midi_config.channel, 0x7B, 0);
|
|
dprintf("midi off\n");
|
|
}
|
|
return false;
|
|
case MI_SUS:
|
|
midi_send_cc(&midi_device, midi_config.channel, 0x40, record->event.pressed ? 127 : 0);
|
|
dprintf("midi sustain %d\n", record->event.pressed);
|
|
return false;
|
|
case MI_PORT:
|
|
midi_send_cc(&midi_device, midi_config.channel, 0x41, record->event.pressed ? 127 : 0);
|
|
dprintf("midi portamento %d\n", record->event.pressed);
|
|
return false;
|
|
case MI_SOST:
|
|
midi_send_cc(&midi_device, midi_config.channel, 0x42, record->event.pressed ? 127 : 0);
|
|
dprintf("midi sostenuto %d\n", record->event.pressed);
|
|
return false;
|
|
case MI_SOFT:
|
|
midi_send_cc(&midi_device, midi_config.channel, 0x43, record->event.pressed ? 127 : 0);
|
|
dprintf("midi soft %d\n", record->event.pressed);
|
|
return false;
|
|
case MI_LEG:
|
|
midi_send_cc(&midi_device, midi_config.channel, 0x43, record->event.pressed ? 127 : 0);
|
|
dprintf("midi legato %d\n", record->event.pressed);
|
|
return false;
|
|
case MI_MOD:
|
|
midi_modulation_step = record->event.pressed ? 1 : -1;
|
|
return false;
|
|
case MI_MODSD:
|
|
if (record->event.pressed) {
|
|
midi_config.modulation_interval++;
|
|
// prevent overflow
|
|
if (midi_config.modulation_interval == 0)
|
|
midi_config.modulation_interval--;
|
|
dprintf("midi modulation interval %d\n", midi_config.modulation_interval);
|
|
}
|
|
return false;
|
|
case MI_MODSU:
|
|
if (record->event.pressed && midi_config.modulation_interval > 0) {
|
|
midi_config.modulation_interval--;
|
|
dprintf("midi modulation interval %d\n", midi_config.modulation_interval);
|
|
}
|
|
return false;
|
|
};
|
|
|
|
return true;
|
|
}
|