Example

Receive MIDI

fnmain() -> !{let dp = pac::Peripherals::take().unwrap();letmut rcc = dp.RCC.constrain();letmut gpioa = dp.GPIOA.split(&mut rcc.apb2);letmut gpioc = dp.GPIOC.split(&mut rcc.apb2);letmut led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);    led.set_high().unwrap();letmut usb_dp = gpioa.pa12.into_push_pull_output(&mut gpioa.crh);let usb =Peripheral{usb: dp.USB,pin_dm: gpioa.pa11,pin_dp: usb_dp.into_floating_input(&mut gpioa.crh),};let usb_bus =UsbBus::new(usb);letmut midi =MidiClass::new(&usb_bus,1,1);letmut usb_dev =UsbDeviceBuilder::new(&usb_bus,UsbVidPid(0x16c0,0x5e4)).product("MIDI Test").device_class(USB_AUDIO_CLASS).device_sub_class(USB_MIDISTREAMING_SUBCLASS).build();constCHANNEL1:Channel =Channel::new(0);loop{if !usb_dev.poll(&mut[&mut midi]){continue;}letmut buffer =[0;64];ifletOk(size) = midi.read(&mut buffer){let buffer_reader =MidiPacketBufferReader::new(&buffer, size);for packetin buffer_reader.into_iter(){ifletOk(packet) = packet{match packet.message{MidiMessage::NoteOn(CHANNEL1,Note::C2, ..) =>{                            led.set_low().unwrap();},MidiMessage::NoteOff(CHANNEL1,Note::C2, ..) =>{                            led.set_high().unwrap();},                        _ =>{}}}}}}}

Using more than one MIDI port

usb-device = { version = ">=0.2.1", features = ["control-buffer-256"] }