Diff: main.cpp

Revision:

0:0fd787d62a99

Child:

1:0dac72ab5910

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jan 03 08:07:31 2018 +0000
@@ -0,0 +1,102 @@
+#include "mbed.h"
+#include "USBHostMIDI.h"
+
+Serial pc(USBTX, USBRX);
+DigitalOut led1(LED1);
+PwmOut led2(LED2), led3(LED3), led4(LED4);
+USBHostMIDI midi;
+
+volatile int sendNoteOn = -1, sendNoteOff = -1, sendControlChange = -1;
+
+void noteOn(uint8_t channel, uint8_t note, uint8_t velocity) {
+    pc.printf("noteOn %02x %02x %02x\r\n", channel, note, velocity);
+    switch (note) {
+    case 0:
+        led2 = (float)velocity / 127.0;
+        break;
+    case 1:
+        led3 = (float)velocity / 127.0;
+        break;
+    case 2:
+        led4 = (float)velocity / 127.0;
+        break;
+    }
+    sendNoteOn = (channel << 16) | (note << 8) | velocity;
+}
+
+void noteOff(uint8_t channel, uint8_t note, uint8_t velocity) {
+    pc.printf("noteOff %02x %02x %02x\r\n", channel, note, velocity);
+    sendNoteOff = (channel << 16) | (note << 8) | velocity;
+}
+
+void controlChange(uint8_t channel, uint8_t key, uint8_t value) {
+    pc.printf("controlChange %02x %02x %02x\r\n", channel, key, value);
+    switch (key) {
+    case 0:
+    case 0x4d:
+        led2 = (float)value / 127.0;
+        break;
+    case 1:
+    case 0x4e:
+        led3 = (float)value / 127.0;
+        break;
+    case 2:
+    case 0x4f:
+        led4 = (float)value / 127.0;
+        break;
+    }
+    sendControlChange = (channel << 16) | (key << 8) | value;
+}
+
+void midi_task(void const*) {
+    int i;
+    USBHostMIDI midi;
+    
+    // attach midi event callbacks
+    midi.attachNoteOn(noteOn);
+    midi.attachNoteOff(noteOff);
+    midi.attachControlChange(controlChange);
+    pc.printf("begin\r\n");
+
+    for (;;) {
+        // try to connect a midi device
+        while(!midi.connect()) {
+            Thread::wait(500);
+            led1 = !led1;
+        }
+        Thread::wait(1000);
+        midi.sendControlChange(0, 41, 127); // LED on (nanoKONTROL2)
+        midi.sendNoteOn(0, 0x29, 127); // LED on (Launch Control XL)
+        led1 = 1;
+
+        for (;;) {
+            if (!midi.connected()) {
+                pc.printf("disconnected\r\n");
+                break;
+            }
+
+            if (sendNoteOn != -1) {
+                midi.sendNoteOn(sendNoteOn >> 16, sendNoteOn >> 8, sendNoteOn);
+                sendNoteOn = -1;
+            }
+            if (sendNoteOff != -1) {
+                midi.sendNoteOff(sendNoteOff >> 16, sendNoteOff >> 8, sendNoteOff);
+                sendNoteOff = -1;
+            }
+            if (sendControlChange != -1) {
+                midi.sendControlChange(sendControlChange >> 16, sendControlChange >> 8, sendControlChange);
+                sendControlChange = -1;
+            }
+        }
+    }
+}
+
+int main() {
+    pc.baud(115200);
+    pc.printf("*** USB Host MIDI\r\n");
+
+    Thread midiTask(midi_task);
+    for (;;) {
+        Thread::wait(100);
+    }
+}