USBMIDI.cpp

00001 /* @license The MIT License
00002  * Copyright (c) 2011 mux, simon
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy
00005  * of this software and associated documentation files (the "Software"), to deal
00006  * in the Software without restriction, including without limitation the rights
00007  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008  * copies of the Software, and to permit persons to whom the Software is
00009  * furnished to do so, subject to the following conditions:
00010  *  
00011  * The above copyright notice and this permission notice shall be included in
00012  * all copies or substantial portions of the Software.
00013  *  
00014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020  * THE SOFTWARE.
00021  */
00022 
00023 #include "USBMIDI.h"
00024 
00025 #include "mbed.h"
00026 #include "usbcore.h"
00027 
00028 static void (*midi_evt)(MIDIMessage) = NULL;
00029 
00030 USBMIDI::USBMIDI() {
00031     usb_init();
00032     usb_connect();
00033     while (!usb_configured());  
00034 }
00035 
00036 void USBMIDI::write(MIDIMessage m) {
00037     while (!writeable());
00038     ep_write(EP5, m.data, 4);
00039 }
00040 
00041 bool USBMIDI::writeable() {
00042     return (bool)ep_writable(EP5);
00043 }
00044 
00045 void USBMIDI::attach(void (*fptr)(MIDIMessage)) {
00046     midi_evt = fptr;
00047 }
00048 
00049 void ep2_in() {}
00050 
00051 void ep2_out() {    
00052     uint8_t buf[MAX_EPn_PSIZE];
00053     int len = ep_read(EP4, buf);
00054     
00055     if (midi_evt != NULL) {
00056         for(int i=0; i<len; i+=4){
00057             midi_evt(MIDIMessage(buf+i));
00058         }
00059     }
00060 }