bool USBMIDI::EP2_OUT_callback() {
uint8_t buf[64];
uint32_t len;
readEP(EPBULK_OUT, buf, &len, 64);
if (midi_evt != NULL) {
for (int i=0; i<len; i+=4) {
midi_evt(MIDIMessage(buf+i));
}
}
// We reactivate the endpoint to receive next characters
readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
return true;
}
bool USBMIDI::EPBULK_OUT_callback() {
uint8_t buf[64];
uint32_t len;
readEP(EPBULK_OUT, buf, &len, 64);
if (midi_evt != NULL) {
for (uint32_t i=0; i<len; i+=4) {
uint8_t data_read;
data_end=true;
switch(buf[i]) {
case 0x2:
// Two-bytes System Common Message - undefined in USBMidi 1.0
data_read=2;
break;
case 0x4:
// SysEx start or continue
data_end=false;
data_read=3;
break;
case 0x5:
// Single-byte System Common Message or SysEx end with one byte
data_read=1;
break;
case 0x6:
// SysEx end with two bytes
data_read=2;
break;
case 0xC:
// Program change
data_read=2;
break;
case 0xD:
// Channel pressure
data_read=2;
break;
case 0xF:
// Single byte
data_read=1;
break;
default:
// Others three-bytes messages
data_read=3;
break;
}
for(uint8_t j=1;j<data_read+1;j++) {
data[cur_data]=buf[i+j];
cur_data++;
}
if(data_end) {
midi_evt(MIDIMessage(data,cur_data));
cur_data=0;
}
}
}
// We reactivate the endpoint to receive next characters
readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
return true;
}