USB device stack
Dependents: mbed_11U24_CapacitorDose_V001
USBMIDI/USBMIDI.cpp
- Committer:
- mbed_official
- Date:
- 2015-04-20
- Revision:
- 50:a3c50882f2c5
- Parent:
- 48:03f8e580579a
File content as of revision 50:a3c50882f2c5:
/* Copyright (c) 2010-2011 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 "stdint.h" #include "USBMIDI.h" USBMIDI::USBMIDI(uint16_t vendor_id, uint16_t product_id, uint16_t product_release) : USBDevice(vendor_id, product_id, product_release), cur_data(0), data_end(true) { midi_evt = NULL; USBDevice::connect(); } // write plain MIDIMessage that will be converted to USBMidi event packet void USBMIDI::write(MIDIMessage m) { // first byte keeped for retro-compatibility for(int p=1; p < m.length; p+=3) { uint8_t buf[4]; // Midi message to USBMidi event packet buf[0]=m.data[1] >> 4; // SysEx if(buf[0] == 0xF) { if((m.length - p) > 3) { // SysEx start or continue buf[0]=0x4; } else { switch(m.length - p) { case 1: // SysEx end with one byte buf[0]=0x5; break; case 2: // SysEx end with two bytes buf[0]=0x6; break; case 3: // SysEx end with three bytes buf[0]=0x7; break; } } } buf[1]=m.data[p]; if(p+1 < m.length) buf[2]=m.data[p+1]; else buf[2]=0; if(p+2 < m.length) buf[3]=m.data[p+2]; else buf[3]=0; USBDevice::write(EPBULK_IN, buf, 4, MAX_PACKET_SIZE_EPBULK); } } void USBMIDI::attach(void (*fptr)(MIDIMessage)) { midi_evt = fptr; } bool USBMIDI::EPBULK_OUT_callback() { uint8_t buf[64]; uint32_t len; readEP(EPBULK_OUT, buf, &len, 64); if (midi_evt != NULL) { for (uint32_t i=0; i<len; i+=4) { uint8_t data_read; data_end=true; switch(buf[i]) { case 0x2: // Two-bytes System Common Message - undefined in USBMidi 1.0 data_read=2; break; case 0x4: // SysEx start or continue data_end=false; data_read=3; break; case 0x5: // Single-byte System Common Message or SysEx end with one byte data_read=1; break; case 0x6: // SysEx end with two bytes data_read=2; break; case 0xC: // Program change data_read=2; break; case 0xD: // Channel pressure data_read=2; break; case 0xF: // Single byte data_read=1; break; default: // Others three-bytes messages data_read=3; break; } for(uint8_t j=1;j<data_read+1;j++) { data[cur_data]=buf[i+j]; cur_data++; } if(data_end) { midi_evt(MIDIMessage(data,cur_data)); cur_data=0; } } } // We reactivate the endpoint to receive next characters readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK); return true; } // Called in ISR context // Set configuration. Return false if the // configuration is not supported. bool USBMIDI::USBCallback_setConfiguration(uint8_t configuration) { if (configuration != DEFAULT_CONFIGURATION) { return false; } // Configure endpoints > 0 addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK); addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK); // We activate the endpoint to be able to receive data readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK); return true; } uint8_t * USBMIDI::stringIinterfaceDesc() { static uint8_t stringIinterfaceDescriptor[] = { 0x0c, //bLength STRING_DESCRIPTOR, //bDescriptorType 0x03 'A',0,'u',0,'d',0,'i',0,'o',0 //bString iInterface - Audio }; return stringIinterfaceDescriptor; } uint8_t * USBMIDI::stringIproductDesc() { static uint8_t stringIproductDescriptor[] = { 0x16, //bLength STRING_DESCRIPTOR, //bDescriptorType 0x03 'M',0,'b',0,'e',0,'d',0,' ',0,'A',0,'u',0,'d',0,'i',0,'o',0 //bString iProduct - Mbed Audio }; return stringIproductDescriptor; } uint8_t * USBMIDI::configurationDesc() { static uint8_t configDescriptor[] = { // configuration descriptor 0x09, 0x02, 0x65, 0x00, 0x02, 0x01, 0x00, 0xc0, 0x50, // The Audio Interface Collection 0x09, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, // Standard AC Interface Descriptor 0x09, 0x24, 0x01, 0x00, 0x01, 0x09, 0x00, 0x01, 0x01, // Class-specific AC Interface Descriptor 0x09, 0x04, 0x01, 0x00, 0x02, 0x01, 0x03, 0x00, 0x00, // MIDIStreaming Interface Descriptors 0x07, 0x24, 0x01, 0x00, 0x01, 0x41, 0x00, // Class-Specific MS Interface Header Descriptor // MIDI IN JACKS 0x06, 0x24, 0x02, 0x01, 0x01, 0x00, 0x06, 0x24, 0x02, 0x02, 0x02, 0x00, // MIDI OUT JACKS 0x09, 0x24, 0x03, 0x01, 0x03, 0x01, 0x02, 0x01, 0x00, 0x09, 0x24, 0x03, 0x02, 0x06, 0x01, 0x01, 0x01, 0x00, // OUT endpoint descriptor 0x09, 0x05, 0x02, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00, 0x05, 0x25, 0x01, 0x01, 0x01, // IN endpoint descriptor 0x09, 0x05, 0x82, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00, 0x05, 0x25, 0x01, 0x01, 0x03, }; return configDescriptor; }