diff options
Diffstat (limited to 'tmk_core/protocol/midi/qmk_midi.c')
| -rw-r--r-- | tmk_core/protocol/midi/qmk_midi.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/tmk_core/protocol/midi/qmk_midi.c b/tmk_core/protocol/midi/qmk_midi.c new file mode 100644 index 000000000..d4de6caa7 --- /dev/null +++ b/tmk_core/protocol/midi/qmk_midi.c @@ -0,0 +1,184 @@ +#include <LUFA/Drivers/USB/USB.h> +#include "qmk_midi.h" +#include "sysex_tools.h" +#include "midi.h" +#include "usb_descriptor.h" +#include "process_midi.h" +#if API_SYSEX_ENABLE +#include "api.h" +#endif + +/******************************************************************************* + * MIDI + ******************************************************************************/ + +MidiDevice midi_device; + +#define SYSEX_START_OR_CONT 0x40 +#define SYSEX_ENDS_IN_1 0x50 +#define SYSEX_ENDS_IN_2 0x60 +#define SYSEX_ENDS_IN_3 0x70 + +#define SYS_COMMON_1 0x50 +#define SYS_COMMON_2 0x20 +#define SYS_COMMON_3 0x30 + +static void usb_send_func(MidiDevice * device, uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2) { + MIDI_EventPacket_t event; + event.Data1 = byte0; + event.Data2 = byte1; + event.Data3 = byte2; + + uint8_t cable = 0; + + //if the length is undefined we assume it is a SYSEX message + if (midi_packet_length(byte0) == UNDEFINED) { + switch(cnt) { + case 3: + if (byte2 == SYSEX_END) + event.Event = MIDI_EVENT(cable, SYSEX_ENDS_IN_3); + else + event.Event = MIDI_EVENT(cable, SYSEX_START_OR_CONT); + break; + case 2: + if (byte1 == SYSEX_END) + event.Event = MIDI_EVENT(cable, SYSEX_ENDS_IN_2); + else + event.Event = MIDI_EVENT(cable, SYSEX_START_OR_CONT); + break; + case 1: + if (byte0 == SYSEX_END) + event.Event = MIDI_EVENT(cable, SYSEX_ENDS_IN_1); + else + event.Event = MIDI_EVENT(cable, SYSEX_START_OR_CONT); + break; + default: + return; //invalid cnt + } + } else { + //deal with 'system common' messages + //TODO are there any more? + switch(byte0 & 0xF0){ + case MIDI_SONGPOSITION: + event.Event = MIDI_EVENT(cable, SYS_COMMON_3); + break; + case MIDI_SONGSELECT: + case MIDI_TC_QUARTERFRAME: + event.Event = MIDI_EVENT(cable, SYS_COMMON_2); + break; + default: + event.Event = MIDI_EVENT(cable, byte0); + break; + } + } + + send_midi_packet(&event); +} + +static void usb_get_midi(MidiDevice * device) { + MIDI_EventPacket_t event; + while (recv_midi_packet(&event)) { + + midi_packet_length_t length = midi_packet_length(event.Data1); + uint8_t input[3]; + input[0] = event.Data1; + input[1] = event.Data2; + input[2] = event.Data3; + if (length == UNDEFINED) { + //sysex + if (event.Event == MIDI_EVENT(0, SYSEX_START_OR_CONT) || event.Event == MIDI_EVENT(0, SYSEX_ENDS_IN_3)) { + length = 3; + } else if (event.Event == MIDI_EVENT(0, SYSEX_ENDS_IN_2)) { + length = 2; + } else if(event.Event == MIDI_EVENT(0, SYSEX_ENDS_IN_1)) { + length = 1; + } else { + //XXX what to do? + } + } + + //pass the data to the device input function + if (length != UNDEFINED) + midi_device_input(device, length, input); + } +} + +static void fallthrough_callback(MidiDevice * device, + uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2){ + +#ifdef AUDIO_ENABLE + if (cnt == 3) { + switch (byte0 & 0xF0) { + case MIDI_NOTEON: + play_note(((double)261.6)*pow(2.0, -4.0)*pow(2.0,(byte1 & 0x7F)/12.0), (byte2 & 0x7F) / 8); + break; + case MIDI_NOTEOFF: + stop_note(((double)261.6)*pow(2.0, -4.0)*pow(2.0,(byte1 & 0x7F)/12.0)); + break; + } + } + if (byte0 == MIDI_STOP) { + stop_all_notes(); + } +#endif +} + + +static void cc_callback(MidiDevice * device, + uint8_t chan, uint8_t num, uint8_t val) { + //sending it back on the next channel + // midi_send_cc(device, (chan + 1) % 16, num, val); +} + +#ifdef API_SYSEX_ENABLE +uint8_t midi_buffer[MIDI_SYSEX_BUFFER] = {0}; + +static void sysex_callback(MidiDevice * device, uint16_t start, uint8_t length, uint8_t * data) { + // SEND_STRING("\n"); + // send_word(start); + // SEND_STRING(": "); + // Don't store the header + int16_t pos = start - 4; + for (uint8_t place = 0; place < length; place++) { + // send_byte(*data); + if (pos >= 0) { + if (*data == 0xF7) { + // SEND_STRING("\nRD: "); + // for (uint8_t i = 0; i < start + place + 1; i++){ + // send_byte(midi_buffer[i]); + // SEND_STRING(" "); + // } + const unsigned decoded_length = sysex_decoded_length(pos); + uint8_t decoded[API_SYSEX_MAX_SIZE]; + sysex_decode(decoded, midi_buffer, pos); + process_api(decoded_length, decoded); + return; + } + else if (pos >= MIDI_SYSEX_BUFFER) { + return; + } + midi_buffer[pos] = *data; + } + // SEND_STRING(" "); + data++; + pos++; + } +} +#endif + +void midi_init(void); + +void setup_midi(void) +{ +#ifdef MIDI_ADVANCED + midi_init(); +#endif + midi_device_init(&midi_device); + midi_device_set_send_func(&midi_device, usb_send_func); + midi_device_set_pre_input_process_func(&midi_device, usb_get_midi); + midi_register_fallthrough_callback(&midi_device, fallthrough_callback); + midi_register_cc_callback(&midi_device, cc_callback); +#ifdef API_SYSEX_ENABLE + midi_register_sysex_callback(&midi_device, sysex_callback); +#endif +} |