Macro define_peripherals 

macro_rules! define_peripherals {
    (
        $(#[$outer:meta])*
        $peripherals:ident {
            $(
                $(#[$inner:meta])*
                $peripheral_name:ident : $peripheral_field:ident $(=$peripheral_alias:ident)?
            ),*
            $(,)?
        }
    ) => { ... };
}

This macro allows to obtain peripherals from the one listed in the peripherals module exported by this crate.

It makes sense to use this macro multiple times, coupled with conditional compilation (using the cfg attribute), to define different setups for different boards.

Note

The define_peripherals! macro expects the ariel_os::hal::peripherals module to be in scope.