Lee Kai Xuan
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Diff: features/unsupported/USBHost/USBHostMIDI/USBHostMIDI.cpp
- Revision:
- 0:f269e3021894
diff -r 000000000000 -r f269e3021894 features/unsupported/USBHost/USBHostMIDI/USBHostMIDI.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/features/unsupported/USBHost/USBHostMIDI/USBHostMIDI.cpp Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,362 @@
+/* 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