Noriaki Mitsunaga
Quick hack to make NSX-39 (Poke-Miku) USB MIDI device to speak "mbed" from mbed which acts as an USB host.
Dependencies: FatFileSystem mbed
Fork of
MIDI_BlueUSB
by 
Radio Junk Box
Description of the project
This is quick hack to control Poke-miku (NSX-39) from mbed. The mbed acts as an USB host and controls USB MIDI device NSX-39. It speaks "mbed" if you send "s¥n" from virtual USB serial (connected to PC or Mac) or push SW connected to p21. It plays MIDI file "test.mid" on local file-system if you push SW connected to p22. You can find files that I have tested at the bottom. The standard MIDI file support is still preliminary. See TestShell.cpp for the hack. This program is derived from MIDI_BlueUSB (http://mbed.org/users/radiojunkbox/code/MIDI_BlueUSB/) by Radio Junk Box.
ポケミク(NSX-39)を無改造のままmbedから鳴らせるようにしてみました。mbedがUSB hostになって、USB MIDIデバイスのポケミクを鳴らします。mbedのバーチャルシリアル(USBシリアル)にPCからs\nを送るか、p21につないだスイッチを押すとmbedとしゃべります。p22につないだスイッチを押すと、ローカルファイルシステム（.binと同じ場所）に保存した test.mid を再生します。試したファイルは下にある test1.mid と test2.mid です。MIDIファイルのサポートはまだまだ完全とはいえません。
tested MIDI files
Video: Poke-miku speaks `mbed'
Revision 4:cd0d8ce967d8, committed 2014-04-29
- Comitter:
- non
- Date:
- Tue Apr 29 06:01:52 2014 +0000
- Parent:
- 3:31fbce33c25b
- Commit message:
- Fix issues when it plays a MIDI file which has multi tracks.
Changed in this revision
| TestShell.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/TestShell.cpp Sun Apr 27 07:40:40 2014 +0000
+++ b/TestShell.cpp Tue Apr 29 06:01:52 2014 +0000
@@ -641,6 +641,10 @@
ret.p = buf;
while (p < e) {
+ if ((*p & 0x80) == 0) {
+ p ++;
+ continue;
+ }
unsigned char evt = (*p & 0xf0);
switch (evt) {
case 0xd0:
@@ -802,57 +806,83 @@
for (int i=0; i<mh->tracks; i++) {
trks[i] = new midiTrack;
trks[i]->readFile(fp);
+ // fprintf(stderr, "Track%d: ", i);
+ // trks[i]->dump();
}
fclose(fp);
+ int deltaT[32] = {0};
+ struct midiPacket pkt[32];
for (int i=0; i<mh->tracks; i++) {
- if (trks[i] == NULL)
+ if (trks[i] == NULL) {
+ pkt[i].len = 0;
continue;
+ }
trks[i]->rewind();
+ do {
+ pkt[i] = trks[i]->next();
+ } while (pkt[i].len == 0 && !trks[i]->isEnd());
}
+ // fprintf(stderr, "%d %d\n", trks[0]->tempo, mh->delta);
+ float waitTime = (float)trks[0]->tempo/(float)mh->delta/1000000.0;
for (;;) {
- struct midiPacket pkt[32];
- bool songEnd = true;
+ USBLoop();
+ bool songEnd = true;
for (int i=0; i<mh->tracks; i++) {
- pkt[i].len = 0;
-
if (trks[i] == NULL)
continue;
-
- if (!trks[i]->isEnd()) {
- pkt[i] = trks[i]->next();
+ if (pkt[i].len > 0) {
songEnd = false;
}
}
if (songEnd)
break;
- for (int t=0; ; t += 10) {
+ unsigned char buf[64], *p = buf;
+ int len = 0;
+
+ for (int i=0; i<mh->tracks; i++) {
USBLoop();
- bool toNext = true;
- for (int i=0; i<mh->tracks; i++) {
- if (pkt[i].len == 0) {
- continue;
+ if (pkt[i].len == 0) {
+ continue;
+ }
+ //fprintf(stderr, "%d: %d %d\n", i, deltaT[i], pkt[i].delta);
+ if (deltaT[i] >= pkt[i].delta) {
+#if 1
+ deltaT[i] = 0;
+#else
+ fprintf(stderr, "%d[%d] ", deltaT[i], i);
+ deltaT[i] = 0;
+ for (int j=0; j<pkt[i].len; j++) {
+ fprintf(stderr, "%02x ", pkt[i].p[j]);
}
- toNext = false;
- if (t >= pkt[i].delta) {
- fprintf(stderr, "%d[%d] ", t, i);
- for (int j=0; j<pkt[i].len; j++) {
- fprintf(stderr, "%02x ", pkt[i].p[j]);
- }
- fprintf(stderr, "\n");
+ fprintf(stderr, "\n");
+#endif
+ if ((len + pkt[i].len) > sizeof(buf)) {
USBBulkTransfer(NSX39_device, NSX39_endpoint,
- pkt[i].p, pkt[i].len, NULL, NULL);
+ buf, len, NULL, NULL);
+ p = buf;
+ len = 0;
+ }
+ memcpy(p, pkt[i].p, pkt[i].len);
+ p += pkt[i].len;
+ len += pkt[i].len;
+ if (!trks[i]->isEnd()) {
+ do {
+ pkt[i] = trks[i]->next();
+ } while (pkt[i].len == 0 && !trks[i]->isEnd());
+ } else {
pkt[i].len = 0;
}
- }
- if (toNext)
- break;
-// fprintf(stderr, "%f ", (float)trks[0]->tempo/(float)mh->delta/1000000.0);
- wait((float)trks[0]->tempo/(float)mh->delta/100000.0);
+ } else
+ deltaT[i] ++;
}
+ if (len > 0)
+ USBBulkTransfer(NSX39_device, NSX39_endpoint,
+ buf, len, NULL, NULL);
+ wait(waitTime);
}
for (int i=0; i<mh->tracks; i++) {