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tmk_keyboard/tool/mbed/mbed-sdk/libraries/USBHost/USBHostMIDI/USBHostMIDI.cpp
Jun Wako 1fe4406f37 Squashed 'tmk_core/' changes from 7967731..b9e0ea0 
b9e0ea0 Merge commit '7fa9d8bdea3773d1195b04d98fcf27cf48ddd81d' as 'tool/mbed/mbed-sdk'
7fa9d8b Squashed 'tool/mbed/mbed-sdk/' content from commit 7c21ce5

git-subtree-dir: tmk_core
git-subtree-split: b9e0ea08cb940de20b3610ecdda18e9d8cd7c552
2015-04-24 16:26:14 +09:00

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/* 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
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