embassy/embassy-stm32/src/rng.rs

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2021-04-26 18:11:46 +00:00
use crate::pac::rng_v1::{regs, Rng};
use crate::peripherals;
use embassy::util::Unborrow;
use embassy_extras::unborrow;
pub struct Random<T: Instance> {
inner: T,
}
impl<T: Instance> Random<T> {
pub fn new(inner: impl Unborrow<Target=T>) -> Self {
unborrow!(inner);
Self {
inner,
}
}
}
use embassy::traits::rng::Rng as RngTrait;
use core::future::Future;
use core::marker::PhantomData;
impl<T:Instance> RngTrait for Random<T> {
type Error = ();
type RngFuture<'a> where Self: 'a = impl Future<Output=Result<(), Self::Error>>;
fn fill<'a>(&'a mut self, dest: &'a mut [u8]) -> Self::RngFuture<'a> {
async move {
Ok(())
}
}
}
pub(crate) mod sealed {
use super::*;
pub trait Instance {
fn regs(&self) -> Rng;
}
}
pub trait Instance: sealed::Instance {}
macro_rules! impl_rng {
($addr:expr) => {
impl crate::rng::sealed::Instance for peripherals::RNG {
fn regs(&self) -> crate::pac::rng_v1::Rng {
crate::pac::rng_v1::Rng($addr as _)
}
}
impl crate::rng::Instance for peripherals::RNG {}
}
}