main.cpp

00001 #include "mbed.h"
00002 #include "USBHostMIDI.h"
00003 
00004 Serial pc(USBTX, USBRX);
00005 DigitalOut led1(LED1);
00006 PwmOut led2(LED2), led3(LED3), led4(LED4);
00007 USBHostMIDI midi;
00008 
00009 volatile int sendNoteOn = -1, sendNoteOff = -1, sendControlChange = -1;
00010 
00011 void noteOn(uint8_t channel, uint8_t note, uint8_t velocity) {
00012     pc.printf("noteOn %02x %02x %02x\r\n", channel, note, velocity);
00013     switch (note) {
00014     case 0:
00015         led2 = (float)velocity / 127.0;
00016         break;
00017     case 1:
00018         led3 = (float)velocity / 127.0;
00019         break;
00020     case 2:
00021         led4 = (float)velocity / 127.0;
00022         break;
00023     }
00024     sendNoteOn = (channel << 16) | (note << 8) | velocity;
00025 }
00026 
00027 void noteOff(uint8_t channel, uint8_t note, uint8_t velocity) {
00028     pc.printf("noteOff %02x %02x %02x\r\n", channel, note, velocity);
00029     sendNoteOff = (channel << 16) | (note << 8) | velocity;
00030 }
00031 
00032 void controlChange(uint8_t channel, uint8_t key, uint8_t value) {
00033     pc.printf("controlChange %02x %02x %02x\r\n", channel, key, value);
00034     switch (key) {
00035     case 0:
00036     case 0x4d:
00037         led2 = (float)value / 127.0;
00038         break;
00039     case 1:
00040     case 0x4e:
00041         led3 = (float)value / 127.0;
00042         break;
00043     case 2:
00044     case 0x4f:
00045         led4 = (float)value / 127.0;
00046         break;
00047     }
00048     sendControlChange = (channel << 16) | (key << 8) | value;
00049 }
00050 
00051 void midi_task(void const*) {
00052     int i;
00053     USBHostMIDI midi;
00054     
00055     // attach midi event callbacks
00056     midi.attachNoteOn(noteOn);
00057     midi.attachNoteOff(noteOff);
00058     midi.attachControlChange(controlChange);
00059     pc.printf("begin\r\n");
00060 
00061     for (;;) {
00062         // try to connect a midi device
00063         while(!midi.connect()) {
00064             Thread::wait(500);
00065             led1 = !led1;
00066         }
00067         Thread::wait(1000);
00068         midi.sendControlChange(0, 41, 127); // LED on (nanoKONTROL2)
00069         midi.sendNoteOn(0, 0x29, 127); // LED on (Launch Control XL)
00070         led1 = 1;
00071 
00072         for (;;) {
00073             if (!midi.connected()) {
00074                 pc.printf("disconnected\r\n");
00075                 break;
00076             }
00077 
00078             if (sendNoteOn != -1) {
00079                 midi.sendNoteOn(sendNoteOn >> 16, sendNoteOn >> 8, sendNoteOn);
00080                 sendNoteOn = -1;
00081             }
00082             if (sendNoteOff != -1) {
00083                 midi.sendNoteOff(sendNoteOff >> 16, sendNoteOff >> 8, sendNoteOff);
00084                 sendNoteOff = -1;
00085             }
00086             if (sendControlChange != -1) {
00087                 midi.sendControlChange(sendControlChange >> 16, sendControlChange >> 8, sendControlChange);
00088                 sendControlChange = -1;
00089             }
00090         }
00091     }
00092 }
00093 
00094 int main() {
00095     pc.baud(115200);
00096     pc.printf("*** USB Host MIDI\r\n");
00097 
00098     Thread midiTask(midi_task);
00099     for (;;) {
00100         Thread::wait(100);
00101     }
00102 }