Updated example in README

Author: sourcebox

README.md

@@ -13,18 +13,31 @@ This crate requires the use of a HAL that implements the `usb-device` traits.
 Turn on an LED as long as note C2 is pressed. The example only shows the hardware-independent parts.
 
 ```rust
+use usb_device::prelude::*;
+use usbd_midi::{
+    data::{
+        midi::{channel::Channel, message::Message, notes::Note},
+        usb_midi::midi_packet_reader::MidiPacketBufferReader,
+    },
+    midi_device::MidiClass,
+};
+
 // Prerequisites, must be setup according to the used board.
 let mut led = todo!(); // Must implement `embedded_hal::digital::OutputPin`.
 let usb_bus = todo!(); // Must be of type `usb_device::bus::UsbBusAllocator`.
 
 // Create a MIDI class with 1 input and 1 output jack.
-let mut midi = MidiClass::new(&usb_bus, 1, 1);
-
-let mut usb_dev = UsbDeviceBuilder::new(&usb_bus, UsbVidPid(0x16c0, 0x5e4))
-    .product("MIDI Test")
-    .device_class(0)
-    .device_sub_class(0)
-    .build();
+let mut midi = MidiClass::new(&usb_bus, 1, 1).unwrap();
+
+    let mut usb_dev = UsbDeviceBuilder::new(&usb_bus, UsbVidPid(0x16c0, 0x5e4))
+        .device_class(0)
+        .device_sub_class(0)
+        .strings(&[StringDescriptors::default()
+            .manufacturer("Music Company")
+            .product("MIDI Device")
+            .serial_number("12345678")])
+        .unwrap()
+        .build();
 
 loop {
     if !usb_dev.poll(&mut [&mut midi]) {