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|
#[macro_export]
macro_rules! peripherals_definition {
($($(#[$cfg:meta])? $name:ident),*$(,)?) => {
/// Types for the peripheral singletons.
pub mod peripherals {
$(
$(#[$cfg])?
#[allow(non_camel_case_types)]
#[doc = concat!(stringify!($name), " peripheral")]
pub struct $name { _private: () }
$(#[$cfg])?
impl $name {
/// Unsafely create an instance of this peripheral out of thin air.
///
/// # Safety
///
/// You must ensure that you're only using one instance of this type at a time.
#[inline]
pub unsafe fn steal() -> Self {
Self{ _private: ()}
}
}
$(#[$cfg])?
$crate::impl_peripheral!($name);
)*
}
};
}
#[macro_export]
macro_rules! peripherals_struct {
($($(#[$cfg:meta])? $name:ident),*$(,)?) => {
/// Struct containing all the peripheral singletons.
///
/// To obtain the peripherals, you must initialize the HAL, by calling [`crate::init`].
#[allow(non_snake_case)]
pub struct Peripherals {
$(
#[doc = concat!(stringify!($name), " peripheral")]
$(#[$cfg])?
pub $name: peripherals::$name,
)*
}
impl Peripherals {
///Returns all the peripherals *once*
#[inline]
pub(crate) fn take() -> Self {
critical_section::with(Self::take_with_cs)
}
///Returns all the peripherals *once*
#[inline]
pub(crate) fn take_with_cs(_cs: critical_section::CriticalSection) -> Self {
#[no_mangle]
static mut _EMBASSY_DEVICE_PERIPHERALS: bool = false;
// safety: OK because we're inside a CS.
unsafe {
if _EMBASSY_DEVICE_PERIPHERALS {
panic!("init called more than once!")
}
_EMBASSY_DEVICE_PERIPHERALS = true;
Self::steal()
}
}
}
impl Peripherals {
/// Unsafely create an instance of this peripheral out of thin air.
///
/// # Safety
///
/// You must ensure that you're only using one instance of this type at a time.
#[inline]
pub unsafe fn steal() -> Self {
Self {
$(
$(#[$cfg])?
$name: peripherals::$name::steal(),
)*
}
}
}
};
}
#[macro_export]
macro_rules! peripherals {
($($(#[$cfg:meta])? $name:ident),*$(,)?) => {
$crate::peripherals_definition!(
$(
$(#[$cfg])?
$name,
)*
);
$crate::peripherals_struct!(
$(
$(#[$cfg])?
$name,
)*
);
};
}
#[macro_export]
macro_rules! into_ref {
($($name:ident),*) => {
$(
let mut $name = $name.into_ref();
)*
}
}
#[macro_export]
macro_rules! impl_peripheral {
($type:ident) => {
impl $crate::Peripheral for $type {
type P = $type;
#[inline]
unsafe fn clone_unchecked(&self) -> Self::P {
#[allow(clippy::needless_update)]
$type { ..*self }
}
}
};
}
|
