208 lines
6.8 KiB
C++
208 lines
6.8 KiB
C++
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/* Copyright (c) 2010-2011 mbed.org, MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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* and associated documentation files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "stdint.h"
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#include "USBMIDI.h"
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USBMIDI::USBMIDI(uint16_t vendor_id, uint16_t product_id, uint16_t product_release)
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: USBDevice(vendor_id, product_id, product_release), cur_data(0), data_end(true)
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{
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midi_evt = NULL;
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USBDevice::connect();
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}
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// write plain MIDIMessage that will be converted to USBMidi event packet
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void USBMIDI::write(MIDIMessage m) {
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// first byte keeped for retro-compatibility
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for(int p=1; p < m.length; p+=3) {
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uint8_t buf[4];
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// Midi message to USBMidi event packet
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buf[0]=m.data[1] >> 4;
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// SysEx
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if(buf[0] == 0xF) {
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if((m.length - p) > 3) {
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// SysEx start or continue
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buf[0]=0x4;
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} else {
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switch(m.length - p) {
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case 1:
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// SysEx end with one byte
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buf[0]=0x5;
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break;
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case 2:
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// SysEx end with two bytes
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buf[0]=0x6;
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break;
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case 3:
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// SysEx end with three bytes
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buf[0]=0x7;
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break;
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}
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}
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}
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buf[1]=m.data[p];
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if(p+1 < m.length)
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buf[2]=m.data[p+1];
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else
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buf[2]=0;
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if(p+2 < m.length)
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buf[3]=m.data[p+2];
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else
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buf[3]=0;
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USBDevice::write(EPBULK_IN, buf, 4, MAX_PACKET_SIZE_EPBULK);
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}
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}
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void USBMIDI::attach(void (*fptr)(MIDIMessage)) {
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midi_evt = fptr;
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}
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bool USBMIDI::EPBULK_OUT_callback() {
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uint8_t buf[64];
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uint32_t len;
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readEP(EPBULK_OUT, buf, &len, 64);
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if (midi_evt != NULL) {
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for (uint32_t i=0; i<len; i+=4) {
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uint8_t data_read;
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data_end=true;
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switch(buf[i]) {
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case 0x2:
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// Two-bytes System Common Message - undefined in USBMidi 1.0
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data_read=2;
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break;
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case 0x4:
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// SysEx start or continue
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data_end=false;
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data_read=3;
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break;
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case 0x5:
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// Single-byte System Common Message or SysEx end with one byte
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data_read=1;
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break;
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case 0x6:
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// SysEx end with two bytes
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data_read=2;
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break;
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case 0xC:
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// Program change
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data_read=2;
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break;
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case 0xD:
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// Channel pressure
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data_read=2;
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break;
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case 0xF:
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// Single byte
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data_read=1;
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break;
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default:
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// Others three-bytes messages
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data_read=3;
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break;
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}
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for(uint8_t j=1;j<data_read+1;j++) {
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data[cur_data]=buf[i+j];
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cur_data++;
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}
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if(data_end) {
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midi_evt(MIDIMessage(data,cur_data));
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cur_data=0;
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}
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}
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}
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// We reactivate the endpoint to receive next characters
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readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
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return true;
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}
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// Called in ISR context
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// Set configuration. Return false if the
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// configuration is not supported.
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bool USBMIDI::USBCallback_setConfiguration(uint8_t configuration) {
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if (configuration != DEFAULT_CONFIGURATION) {
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return false;
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}
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// Configure endpoints > 0
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addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK);
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addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
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// We activate the endpoint to be able to receive data
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readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
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return true;
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}
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uint8_t * USBMIDI::stringIinterfaceDesc() {
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static uint8_t stringIinterfaceDescriptor[] = {
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0x0c, //bLength
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STRING_DESCRIPTOR, //bDescriptorType 0x03
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'A',0,'u',0,'d',0,'i',0,'o',0 //bString iInterface - Audio
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};
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return stringIinterfaceDescriptor;
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}
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uint8_t * USBMIDI::stringIproductDesc() {
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static uint8_t stringIproductDescriptor[] = {
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0x16, //bLength
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STRING_DESCRIPTOR, //bDescriptorType 0x03
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'M',0,'b',0,'e',0,'d',0,' ',0,'A',0,'u',0,'d',0,'i',0,'o',0 //bString iProduct - Mbed Audio
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};
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return stringIproductDescriptor;
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}
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uint8_t * USBMIDI::configurationDesc() {
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static uint8_t configDescriptor[] = {
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// configuration descriptor
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0x09, 0x02, 0x65, 0x00, 0x02, 0x01, 0x00, 0xc0, 0x50,
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// The Audio Interface Collection
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0x09, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, // Standard AC Interface Descriptor
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0x09, 0x24, 0x01, 0x00, 0x01, 0x09, 0x00, 0x01, 0x01, // Class-specific AC Interface Descriptor
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0x09, 0x04, 0x01, 0x00, 0x02, 0x01, 0x03, 0x00, 0x00, // MIDIStreaming Interface Descriptors
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0x07, 0x24, 0x01, 0x00, 0x01, 0x41, 0x00, // Class-Specific MS Interface Header Descriptor
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// MIDI IN JACKS
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0x06, 0x24, 0x02, 0x01, 0x01, 0x00,
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0x06, 0x24, 0x02, 0x02, 0x02, 0x00,
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// MIDI OUT JACKS
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0x09, 0x24, 0x03, 0x01, 0x03, 0x01, 0x02, 0x01, 0x00,
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0x09, 0x24, 0x03, 0x02, 0x06, 0x01, 0x01, 0x01, 0x00,
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// OUT endpoint descriptor
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0x09, 0x05, 0x02, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
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0x05, 0x25, 0x01, 0x01, 0x01,
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// IN endpoint descriptor
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0x09, 0x05, 0x82, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
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0x05, 0x25, 0x01, 0x01, 0x03,
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};
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return configDescriptor;
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}
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