Diff: main.cpp

Revision:

0:128aa8026f32

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Nov 09 10:06:48 2011 +0000
@@ -0,0 +1,63 @@
+// Hello World example for the USBMIDI library
+
+#include "mbed.h"
+#include "USBMIDI.h"
+
+//USBMIDI object
+USBMIDI midi;
+
+
+// Leds which will be switch on or off according to a MIDImessage
+BusOut leds(LED1, LED2, LED3, LED4);
+
+BusInOut buttons(p22, p23, p24, p25);
+
+void show_message(MIDIMessage msg) {
+    switch (msg.type()) {
+        case MIDIMessage::NoteOnType:
+            switch (msg.key()) {
+                case 48:
+                    leds = (1 << 0);
+                    break;
+                case 49:
+                    leds = (1 << 1);
+                    break;
+                case 50:
+                    leds = (1 << 2);
+                    break;
+                case 51:
+                    leds = (1 << 3);
+                    break;
+            }
+            break;
+        case MIDIMessage::NoteOffType:
+        default:
+            leds = 0;
+    }
+}
+
+int main() {
+    uint8_t bus = 0;
+    uint8_t p_bus = 0;
+
+    // call back for messages received
+    midi.attach(show_message);
+
+    while (1) {
+
+        //if buttons state changes, send a MIDI message
+        bus = buttons.read();
+        for (int i = 0; i < 4; i++) {
+            if ( (bus & (1 << i)) != (p_bus & (1 << i))) {
+                if (bus & (1 << i)) {
+                    midi.write(MIDIMessage::NoteOn(48 + i));
+                } else if ( !(bus & (1 << i)) ) {
+                    midi.write(MIDIMessage::NoteOff(48 + i));
+                }
+
+            }
+        }
+        wait(0.001);
+        p_bus = bus;
+    }
+}