Fuminori ALAI
Simple monophonic synthesizer. - USB MIDI function PWM出力を使用した簡単なモノフォニックシンセです。 USB MIDI Functionとして動作します。 {{http://www.youtube.com/watch?v=UWonXdsNGkE}} {{https://lh4.googleusercontent.com/-LHPkdbs5pdw/TxA07cSVUmI/AAAAAAAACVY/2Bia4nz1ptI/s476/mbedDeMonoSynth.png}}
Revision 0:9c32c9c8ead4, committed 2011-12-29
- Comitter:
- alaif
- Date:
- Thu Dec 29 12:44:19 2011 +0000
- Commit message:
Changed in this revision
diff -r 000000000000 -r 9c32c9c8ead4 USBMIDI.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBMIDI.lib Thu Dec 29 12:44:19 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/USBMIDI/#10d694d6ccdc
diff -r 000000000000 -r 9c32c9c8ead4 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Dec 29 12:44:19 2011 +0000
@@ -0,0 +1,59 @@
+/*
+ * Simple monophonic synthesizer
+ * auther: alaif.
+ */
+#include "mbed.h"
+#include "USBMIDI.h"
+
+/* MIDI note no -> FREQ */
+#include "math.h"
+#define NOTE2FREQ(note) (440 * pow(2, ((note - 69) / 12.0f)))
+
+/* HARDWARE Config */
+PwmOut sp1(p21);
+DigitalOut led_ready(LED1);
+DigitalOut led_noteon(LED2);
+
+//NOTE ON event
+void note_on(int note, int vel)
+{
+ if (vel != 0) {
+ sp1.period(1.0f / NOTE2FREQ(note)); //Set freq
+ sp1.write(0.5f); //SQUARE WAVE ON
+ led_noteon = 1;
+ } else {
+ sp1.write(0.0f); //SQUARE WAVE OFF
+ led_noteon = 0;
+ }
+}
+
+//NOTE OFF event
+void note_off()
+{
+ sp1.write(0.0f);
+ led_noteon = 0;
+}
+
+//Recv midi message handler.
+void do_message(MIDIMessage msg)
+{
+ int key = msg.key();
+ switch (msg.type()) {
+ case MIDIMessage::NoteOnType:
+ note_on(key, msg.velocity());
+ break;
+ case MIDIMessage::NoteOffType:
+ note_off();
+ break;
+ }
+}
+
+/* Main */
+USBMIDI midi;
+int main() {
+ led_ready = 0;
+ midi.attach(do_message); // call back for messages received
+ led_ready = 1;
+
+ while (1) {}
+}
diff -r 000000000000 -r 9c32c9c8ead4 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Dec 29 12:44:19 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e