Function dispatch_loop 

pub(crate) async fn dispatch_loop<H, C>(
    rx: HidReader<'static, Driver<'static, USB>, REPORT_SIZE>,
    tx: HidWriter<'static, Driver<'static, USB>, REPORT_SIZE>,
    service: CryptoService<H, C>,
) -> !
where
    H: AteccHal,
    C: Clock,
    H::Error: Debug,

Main request/response loop: read a HID report, dispatch on the opcode, write the response.

This task owns the [CryptoService] and therefore runs sequentially. Concurrent requests are not supported; the protocol does not need them.