Macro define_uart 

macro_rules! define_uart {
    ( name: $name:ident, device: $device:ident, tx: $tx:ident, rx: $rx:ident, host_facing: $_host_facing:literal ) => { ... };
}

Available on crate feature uart only.

Creates a struct of the given name, containing all peripherals needed to set up a UART.

It holds the TX and RX pins, and can be taken through the same mechanism as those defined using define_peripherals! (that is, by using ariel_os::task(autostart, peripherals) or the underlying TakePeripherals trait).

The struct also has a method .build_with_config() that can be used to initialize an Ariel OS uart instance.