Added USBMIDI tests + bugfix MIDI OUT

libraries/USBDevice/USBMIDI/USBMIDI.cpp

@@ -31,10 +31,10 @@ void USBMIDI::write(MIDIMessage m) {
     for(int p=1; p < m.length; p+=3) {
         uint8_t buf[4];
         // Midi message to USBMidi event packet
-        buf[0]=m.data[p] >> 4;
+        buf[0]=m.data[1] >> 4;
         // SysEx
         if(buf[0] == 0xF) {
-            if(p < m.length-1) {
+            if((m.length - p) > 3) {
                 // SysEx start or continue
                 buf[0]=0x4;
             } else {
@@ -55,8 +55,16 @@ void USBMIDI::write(MIDIMessage m) {
             }
         }
         buf[1]=m.data[p];
-        buf[2]=m.data[p+1];
+
-        buf[3]=m.data[p+2];
+        if(p+1 < m.length)
+            buf[2]=m.data[p+1];
+        else
+            buf[2]=0;
+
+        if(p+2 < m.length)
+            buf[3]=m.data[p+2];
+        else
+            buf[3]=0;
 
         USBDevice::write(EPBULK_IN, buf, 4, MAX_PACKET_SIZE_EPBULK);
     }

libraries/tests/usb/device/midi/main.cpp

@@ -4,7 +4,70 @@
 USBMIDI midi;
 Serial pc(USBTX, USBRX);
 
+// MIDI IN
+void transmitMessage(MIDIMessage msg) {
+ 	switch (msg.type()) {
+        case MIDIMessage::NoteOnType:
+        	wait(0.1);
+			midi.write(MIDIMessage::NoteOn(msg.key()));
+            break;
+        case MIDIMessage::NoteOffType:
+        	wait(0.1);
+			midi.write(MIDIMessage::NoteOff(msg.key()));
+            break;
+        case MIDIMessage::ProgramChangeType:
+        	wait(0.1);
+        	midi.write(MIDIMessage::ProgramChange(msg.program()));
+            break;
+        case MIDIMessage::SysExType:
+        	wait(0.1);
+        	unsigned char tmp[64];
+            for(int i=0;i<msg.length-1;i++) {
+	            tmp[i]=msg.data[i+1];
+            }
+            midi.write(MIDIMessage::SysEx(tmp,msg.length-1));
+            break;
+        default:
+            break;
+    }    
+}
+
 int main(void)
 {
+	wait(5);
+	// MIDI OUT
+
+	// set piano
+	midi.write(MIDIMessage::ProgramChange(1));
+	wait(0.1);
+
+	// play A
+	midi.write(MIDIMessage::NoteOn(21));
+	wait(0.1);
+	midi.write(MIDIMessage::NoteOff(21));
+	wait(0.1);
+
+	// GM reset
+	unsigned char gm_reset[]={0xF0,0x7E,0x7F,0x09,0x01,0xF7};
+	midi.write(MIDIMessage::SysEx(gm_reset,6));
+	wait(0.1);
+
+	// GM Master volume max
+	unsigned char gm_master_vol_max[]={0xF0,0x7F,0x7F,0x04,0x01,0x7F,0x7F,0xF7};
+	midi.write(MIDIMessage::SysEx(gm_master_vol_max,8));
+	wait(0.1);
+
+	// GS reset
+	unsigned char gs_reset[]={0xF0,0x41,0x10,0x42,0x12,0x40,0x00,0x7F,0x00,0x41,0xF7};
+	midi.write(MIDIMessage::SysEx(gs_reset,11));
+	wait(0.1);
+
+	// GS Master volume max
+	unsigned char gs_master_vol_max[]={0xF0,0x41,0x10,0x42,0x12,0x40,0x00,0x04,0x7F,0x3D,0xF7};
+	midi.write(MIDIMessage::SysEx(gs_master_vol_max,11));
+	wait(0.1);
+
+	midi.attach(transmitMessage);
+
     while(1);
 }

workspace_tools/host_tests/midi.py

@@ -0,0 +1,72 @@
+from __future__ import print_function
+import sys
+import re
+import time
+import mido
+from mido import Message
+
+
+def test_midi_in(port):
+	expected_messages_count=0
+	while expected_messages_count < 7:
+		for message in port.iter_pending():
+			if message.type in ('note_on', 'note_off', 'program_change', 'sysex'):
+				yield message
+				expected_messages_count+=1
+		time.sleep(0.1)
+
+def test_midi_loopback(input_port):
+	expected_messages_count=0
+	while expected_messages_count < 1:
+		for message in input_port.iter_pending():
+			print('Test MIDI OUT loopback received {}'.format(message.hex()))
+			expected_messages_count+=1
+
+def test_midi_out_loopback(output_port,input_port):
+	print("Test MIDI OUT loopback")
+	output_port.send(Message('program_change', program=1))
+	test_midi_loopback(input_port)
+
+	output_port.send(Message('note_on', note=21))
+	test_midi_loopback(input_port)
+
+	output_port.send(Message('note_off', note=21))
+	test_midi_loopback(input_port)
+
+	output_port.send(Message('sysex', data=[0x7E,0x7F,0x09,0x01]))
+	test_midi_loopback(input_port)
+
+	output_port.send(Message('sysex', data=[0x7F,0x7F,0x04,0x01,0x7F,0x7F]))
+	test_midi_loopback(input_port)
+
+	output_port.send(Message('sysex', data=[0x41,0x10,0x42,0x12,0x40,0x00,0x7F,0x00,0x41]))
+	test_midi_loopback(input_port)
+
+	output_port.send(Message('sysex', data=[0x41,0x10,0x42,0x12,0x40,0x00,0x04,0x7F,0x3D]))
+	test_midi_loopback(input_port)
+
+portname=""
+
+while portname=="":
+	print("Wait for MIDI IN plug ...")
+	for name in mido.get_input_names():
+		matchObj = re.match( r'Mbed', name)
+
+		if matchObj:
+			portname=name
+	time.sleep( 1 )
+
+try:
+	input_port = mido.open_input(portname)
+	output_port = mido.open_output(portname)
+	
+	print('Using {}'.format(input_port))
+
+	print("Test MIDI IN")
+
+	for message in test_midi_in(input_port):
+		print('Test MIDI IN received {}'.format(message.hex()))
+
+	test_midi_out_loopback(output_port,input_port)
+except KeyboardInterrupt:
+    pass