Yuu Kobayashi
Nucleo F401REでFM音源を実装するやつ 外部DACとオペアンプを利用 現在はMCP4922とNJM2737
Dependencies: AOTTrigon I2CEEPROM MCP4922 AQM0802A mbed
Fork of
NuMidi401
by 
Yuu Kobayashi
NuFM401
Nucleo F401用の自作ソフトウェアMIDI音源
概要
だいたいそんなもんです。
特徴
- ブレッドボードの上で組める程度には簡単な回路構成
- 外部のDACにMCP4922を採用
- 念のためのボルテージフォロアとしてNJM2737Dを採用
- バンク用EEPROMに24FC1025を採用
- シリアル経由でMIDIデータを受信することで操作
補足
シリアル <=> MIDI のドライバにはHairless-MIDISerialをオススメします。 仮想MIDIケーブルはとりあえずMIDI Yokeで。
Diff: FMOscillator/FMOscillator.cpp
- Revision:
- 13:e11380ceb460
- Parent:
- 11:62da91a1eaf1
- Child:
- 14:06785925915e
diff -r 7408b85fba39 -r e11380ceb460 FMOscillator/FMOscillator.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/FMOscillator/FMOscillator.cpp Sat Jan 17 03:57:58 2015 +0000
@@ -0,0 +1,146 @@
+#include "FMOscillator.h"
+
+char sysexData[128];
+
+FMOscillator::FMOscillator() {
+
+}
+
+FMOscillator::FMOscillator(Timer *timer, Serial *serial, AOTTrigon *trigon) {
+
+}
+
+void FMOscillator::getMIDIMessage()
+{
+ unsigned char st = serial->getc();
+ switch(st >> 4) {
+ case 0x8:
+ midiNoteOff(st & 0xf, midis.getc(), midis.getc());
+ break;
+ case 0x9:
+ midiNoteOn(st & 0xf, midis.getc(), midis.getc());
+ break;
+ case 0xa:
+ midiPolyphonicKeyPressure(st & 0xf, midis.getc(), midis.getc());
+ break;
+ case 0xb:
+ char b2 = midis.getc();
+ if (b2 >= 120) {
+ midiChannelMode(st & 0xf, b2, midis.getc());
+ } else {
+ midiControlChange(st & 0xf, b2, midis.getc());
+ }
+ break;
+ case 0xc:
+ midiProgramChange(st & 0xf, midis.getc());
+ break;
+ case 0xd:
+ midiChannelPressure(st & 0xf, midis.getc());
+ break;
+ case 0xe:
+ char LSB = midis.getc();
+ char MSB = midis.getc();
+ midiPitchBend(st & 0xf, ((LSB << 7) | (MSB << 7)) + 8192);
+ break;
+ case 0xf:
+ int t2 = st & 0xf;
+ if (t2 <= 7) {
+ getMIDISystemCommonMessage(t2);
+ } else {
+ midiSystemRealtimeMessage(st);
+ }
+ break;
+ }
+}
+
+void FMOscillator::getMIDISystemCommonMessage(char t2)
+{
+ switch(t2) {
+ case 0:
+ //もう面倒臭いから128byteのバッファに適当に放り込んでおこう
+ sysexData[0] = 0xf0;
+ int i = 1;
+ char d = 0;
+ do {
+ d = serial->getc();
+ sysexData[i]=d;
+ i++;
+ } while(d != 0xf7);
+
+ break;
+ case 1:
+ serial->getc();
+ break;
+ case 2:
+ midis.getc();
+ midis.getc();
+ break;
+ case 3:
+ midis.getc();
+ break;
+ case 4:
+ break;
+ case 5:
+ break;
+ case 6:
+ break;
+ case 7:
+ //どうしろと
+ break;
+ }
+}
+
+void FMOscillator::midiSystemRealtimeMessage(char mes)
+{
+
+}
+
+
+void FMOscillator::midiNoteOn(char ch, char note, char vel)
+{
+ if (vel==0) {
+ //globalrelease((ch<<8)|note);
+ } else {
+ //globalattack((ch<<8)|note,vel);
+ }
+}
+
+void FMOscillator::midiNoteOff(char ch, char note, char vel)
+{
+ //globalrelease((ch<<8)|note);
+}
+
+void FMOscillator::midiPolyphonicKeyPressure(char ch, char note, char vel)
+{
+
+}
+
+void FMOscillator::midiControlChange(char ch, char ctrl, char data)
+{
+
+}
+
+void FMOscillator::midiChannelMode(char ch, char ctrl, char data)
+{
+
+}
+
+void FMOscillator::midiProgramChange(char ch, char prg)
+{
+
+}
+
+void FMOscillator::midiChannelPressure(char ch, char pres)
+{
+
+}
+
+void FMOscillator::midiPitchBend(char ch, short pb)
+{
+
+}
+
+void FMOscillator::midiSystemExclusiveMessage()
+{
+
+}
\ No newline at end of file