forked for unsupported target
Dependents: stm32-disco-example DISCO-F469NI_BD_SD_Card_Control
Fork of USBHOST by
USBHostMIDI/USBHostMIDI.cpp
- Committer:
- frq08711@LMECWL0871.LME.ST.COM
- Date:
- 2017-02-15
- Revision:
- 1:ab240722d7ef
File content as of revision 1:ab240722d7ef:
/* Copyright (c) 2014 mbed.org, MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software * and associated documentation files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "USBHostMIDI.h" #if USBHOST_MIDI #include "dbg.h" #define SET_LINE_CODING 0x20 USBHostMIDI::USBHostMIDI() { host = USBHost::getHostInst(); size_bulk_in = 0; size_bulk_out = 0; init(); } void USBHostMIDI::init() { dev = NULL; bulk_in = NULL; bulk_out = NULL; dev_connected = false; midi_intf = -1; midi_device_found = false; sysExBufferPos = 0; } bool USBHostMIDI::connected() { return dev_connected; } bool USBHostMIDI::connect() { if (dev_connected) { return true; } for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) { if ((dev = host->getDevice(i)) != NULL) { USB_DBG("Trying to connect MIDI device\r\n"); if (host->enumerate(dev, this)) { break; } if (midi_device_found) { bulk_in = dev->getEndpoint(midi_intf, BULK_ENDPOINT, IN); bulk_out = dev->getEndpoint(midi_intf, BULK_ENDPOINT, OUT); if (!bulk_in || !bulk_out) { break; } USB_INFO("New MIDI device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, midi_intf); dev->setName("MIDI", midi_intf); host->registerDriver(dev, midi_intf, this, &USBHostMIDI::init); size_bulk_in = bulk_in->getSize(); size_bulk_out = bulk_out->getSize(); bulk_in->attach(this, &USBHostMIDI::rxHandler); host->bulkRead(dev, bulk_in, buf, size_bulk_in, false); dev_connected = true; return true; } } } init(); return false; } void USBHostMIDI::rxHandler() { uint8_t *midi; if (bulk_in) { int length = bulk_in->getLengthTransferred(); if (bulk_in->getState() == USB_TYPE_IDLE || bulk_in->getState() == USB_TYPE_FREE) { // MIDI event handling for (int i = 0; i < length; i += 4) { if (i + 4 > length) { // length shortage, ignored. break; } // read each four bytes midi = &buf[i]; // process MIDI message // switch by code index number switch (midi[0] & 0xf) { case 0: // miscellaneous function codes miscellaneousFunctionCode(midi[1], midi[2], midi[3]); break; case 1: // cable events cableEvent(midi[1], midi[2], midi[3]); break; case 2: // two bytes system common messages systemCommonTwoBytes(midi[1], midi[2]); break; case 3: // three bytes system common messages systemCommonThreeBytes(midi[1], midi[2], midi[3]); break; case 4: // SysEx starts or continues sysExBuffer[sysExBufferPos++] = midi[1]; if (sysExBufferPos >= 64) { systemExclusive(sysExBuffer, sysExBufferPos, true); sysExBufferPos = 0; } sysExBuffer[sysExBufferPos++] = midi[2]; if (sysExBufferPos >= 64) { systemExclusive(sysExBuffer, sysExBufferPos, true); sysExBufferPos = 0; } sysExBuffer[sysExBufferPos++] = midi[3]; // SysEx continues. don't send break; case 5: // SysEx ends with single byte sysExBuffer[sysExBufferPos++] = midi[1]; systemExclusive(sysExBuffer, sysExBufferPos, false); sysExBufferPos = 0; break; case 6: // SysEx ends with two bytes sysExBuffer[sysExBufferPos++] = midi[1]; if (sysExBufferPos >= 64) { systemExclusive(sysExBuffer, sysExBufferPos, true); sysExBufferPos = 0; } sysExBuffer[sysExBufferPos++] = midi[2]; systemExclusive(sysExBuffer, sysExBufferPos, false); sysExBufferPos = 0; break; case 7: // SysEx ends with three bytes sysExBuffer[sysExBufferPos++] = midi[1]; if (sysExBufferPos >= 64) { systemExclusive(sysExBuffer, sysExBufferPos, true); sysExBufferPos = 0; } sysExBuffer[sysExBufferPos++] = midi[2]; if (sysExBufferPos >= 64) { systemExclusive(sysExBuffer, sysExBufferPos, true); sysExBufferPos = 0; } sysExBuffer[sysExBufferPos++] = midi[3]; systemExclusive(sysExBuffer, sysExBufferPos, false); sysExBufferPos = 0; break; case 8: noteOff(midi[1] & 0xf, midi[2], midi[3]); break; case 9: if (midi[3]) { noteOn(midi[1] & 0xf, midi[2], midi[3]); } else { noteOff(midi[1] & 0xf, midi[2], midi[3]); } break; case 10: polyKeyPress(midi[1] & 0xf, midi[2], midi[3]); break; case 11: controlChange(midi[1] & 0xf, midi[2], midi[3]); break; case 12: programChange(midi[1] & 0xf, midi[2]); break; case 13: channelPressure(midi[1] & 0xf, midi[2]); break; case 14: pitchBend(midi[1] & 0xf, midi[2] | (midi[3] << 7)); break; case 15: singleByte(midi[1]); break; } } // read another message host->bulkRead(dev, bulk_in, buf, size_bulk_in, false); } } } bool USBHostMIDI::sendMidiBuffer(uint8_t data0, uint8_t data1, uint8_t data2, uint8_t data3) { if (bulk_out) { uint8_t midi[4]; midi[0] = data0; midi[1] = data1; midi[2] = data2; midi[3] = data3; if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, 4) == USB_TYPE_OK) { return true; } } return false; } bool USBHostMIDI::sendMiscellaneousFunctionCode(uint8_t data1, uint8_t data2, uint8_t data3) { return sendMidiBuffer(0, data1, data2, data3); } bool USBHostMIDI::sendCableEvent(uint8_t data1, uint8_t data2, uint8_t data3) { return sendMidiBuffer(1, data1, data2, data3); } bool USBHostMIDI::sendSystemCommmonTwoBytes(uint8_t data1, uint8_t data2) { return sendMidiBuffer(2, data1, data2, 0); } bool USBHostMIDI::sendSystemCommmonThreeBytes(uint8_t data1, uint8_t data2, uint8_t data3) { return sendMidiBuffer(3, data1, data2, 0); } bool USBHostMIDI::sendSystemExclusive(uint8_t *buffer, int length) { uint8_t midi[64]; int midiLength; int midiPos; if (bulk_out) { for (int i = 0; i < length; i += 48) { if (i + 48 >= length) { // contains last data midiLength = (((length - i) + 2) / 3) * 4; for (int pos = i; pos < length; pos += 3) { midiPos = (pos + 2) / 3 * 4; if (pos + 3 >= length) { // last data switch (pos % 3) { case 0: midi[midiPos ] = 7; midi[midiPos + 1] = buffer[pos ]; midi[midiPos + 2] = buffer[pos + 1]; midi[midiPos + 3] = buffer[pos + 2]; break; case 1: midi[midiPos ] = 5; midi[midiPos + 1] = buffer[pos ]; midi[midiPos + 2] = 0; midi[midiPos + 3] = 0; break; case 2: midi[midiPos ] = 6; midi[midiPos + 1] = buffer[pos ]; midi[midiPos + 2] = buffer[pos + 1]; midi[midiPos + 3] = 0; break; } } else { // has more data midi[midiPos ] = 4; midi[midiPos + 1] = buffer[pos ]; midi[midiPos + 2] = buffer[pos + 1]; midi[midiPos + 3] = buffer[pos + 2]; } } } else { // has more data midiLength = 64; for (int pos = i; pos < length; pos += 3) { midiPos = (pos + 2) / 3 * 4; midi[midiPos ] = 4; midi[midiPos + 1] = buffer[pos ]; midi[midiPos + 2] = buffer[pos + 1]; midi[midiPos + 3] = buffer[pos + 2]; } } if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, midiLength) != USB_TYPE_OK) { return false; } } return true; } return false; } bool USBHostMIDI::sendNoteOff(uint8_t channel, uint8_t note, uint8_t velocity) { return sendMidiBuffer(8, channel & 0xf | 0x80, note & 0x7f, velocity & 0x7f); } bool USBHostMIDI::sendNoteOn(uint8_t channel, uint8_t note, uint8_t velocity) { return sendMidiBuffer(9, channel & 0xf | 0x90, note & 0x7f, velocity & 0x7f); } bool USBHostMIDI::sendPolyKeyPress(uint8_t channel, uint8_t note, uint8_t pressure) { return sendMidiBuffer(10, channel & 0xf | 0xa0, note & 0x7f, pressure & 0x7f); } bool USBHostMIDI::sendControlChange(uint8_t channel, uint8_t key, uint8_t value) { return sendMidiBuffer(11, channel & 0xf | 0xb0, key & 0x7f, value & 0x7f); } bool USBHostMIDI::sendProgramChange(uint8_t channel, uint8_t program) { return sendMidiBuffer(12, channel & 0xf | 0xc0, program & 0x7f, 0); } bool USBHostMIDI::sendChannelPressure(uint8_t channel, uint8_t pressure) { return sendMidiBuffer(13, channel & 0xf | 0xd0, pressure & 0x7f, 0); } bool USBHostMIDI::sendPitchBend(uint8_t channel, uint16_t value) { return sendMidiBuffer(14, channel & 0xf | 0xe0, value & 0x7f, (value >> 7) & 0x7f); } bool USBHostMIDI::sendSingleByte(uint8_t data) { return sendMidiBuffer(15, data, 0, 0); } /*virtual*/ void USBHostMIDI::setVidPid(uint16_t vid, uint16_t pid) { // we don't check VID/PID for this driver } /*virtual*/ bool USBHostMIDI::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed { // USB MIDI class/subclass if ((midi_intf == -1) && (intf_class == AUDIO_CLASS) && (intf_subclass == 0x03)) { midi_intf = intf_nb; return true; } // vendor specific device if ((midi_intf == -1) && (intf_class == 0xff) && (intf_subclass == 0x03)) { midi_intf = intf_nb; return true; } return false; } /*virtual*/ bool USBHostMIDI::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used { if (intf_nb == midi_intf) { if (type == BULK_ENDPOINT) { midi_device_found = true; return true; } } return false; } #endif