my_dream.rs

use stm32_usbd::UsbCore;
use usbd_serial::SerialPort;
usb usbd_hid::HidKeyboard;

// This macro generates a constructor (pub fn new) and all the required descriptors as a bunch of
// &'static [u8] at compile time.
//
// Problem: it needs complicated information from the crates that implement SerialPort and
// HidKeyboard and it doesn't seem to be feasible to access those from a procmacro (except via
// extremely sketchy and brittle hacks such as writing to temporary files or whatnot)

#[usb_device(
    core=UsbCore,
    vid=0x16c0,
    pid=0x27db,
    manufacturer="Nonexistent Company",
    product="Sample device")]
struct MyDevice {
    device: UsbDevice, // required
    serial: SerialPort,
    keyboard: HidKeyboard,
}

fn main() -> ! {
    let peripherals = Peripherals::take();

    let usb_core = PlatformUsbCore::new(peripherals.USB);
    let { mut device, mut serial, mut keyboard } = MyDevice::new(usb_core);

    loop {
        device.poll();

        serial.read(...);

        keyboard.type(...);
    }
}