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stm32/dma: add MuxChannel trait to distinguish DMAMUX1 and DMAMUX2 channels.

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This commit is contained in:
Dario Nieuwenhuis 2021-07-17 07:49:49 +02:00
parent 54b5012c56
commit 3655048e0f
5 changed files with 37 additions and 14 deletions
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8
embassy-stm32/src/dma/bdma.rs
View File

@ -175,9 +175,9 @@ pac::dma_channels! {
buf.as_mut_ptr(),
buf.len(),
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_REGS,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_REGS,
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_CH_NUM,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_CH_NUM,
)
}
}
@ -199,9 +199,9 @@ pac::dma_channels! {
buf.as_ptr() as *mut u8,
buf.len(),
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_REGS,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_REGS,
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_CH_NUM,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_CH_NUM,
)
}
}

8
embassy-stm32/src/dma/dma.rs
View File

@ -177,9 +177,9 @@ pac::dma_channels! {
buf.as_mut_ptr(),
buf.len(),
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_REGS,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_REGS,
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_CH_NUM,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_CH_NUM,
)
}
}
@ -201,9 +201,9 @@ pac::dma_channels! {
buf.as_ptr() as *mut u8,
buf.len(),
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_REGS,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_REGS,
#[cfg(dmamux)]
<Self as super::dmamux::MuxChannel>::DMAMUX_CH_NUM,
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_CH_NUM,
)
}
}

18
embassy-stm32/src/dma/dmamux.rs
View File

@ -19,17 +19,31 @@ pub(crate) unsafe fn configure_dmamux(
});
}
pub(crate) trait MuxChannel {
pub(crate) mod sealed {
use super::*;
pub trait MuxChannel {
const DMAMUX_CH_NUM: u8;
const DMAMUX_REGS: pac::dmamux::Dmamux;
}
}
pub struct DMAMUX1;
#[cfg(rcc_h7)]
pub struct DMAMUX2;
pub trait MuxChannel: sealed::MuxChannel + super::Channel {
type Mux;
}
pac::dma_channels! {
($channel_peri:ident, $dma_peri:ident, $version:ident, $channel_num:expr, {dmamux: $dmamux:ident, dmamux_channel: $dmamux_channel:expr}) => {
impl MuxChannel for peripherals::$channel_peri {
impl sealed::MuxChannel for peripherals::$channel_peri {
const DMAMUX_CH_NUM: u8 = $dmamux_channel;
const DMAMUX_REGS: pac::dmamux::Dmamux = pac::$dmamux;
}
impl MuxChannel for peripherals::$channel_peri {
type Mux = $dmamux;
}
};
}

3
embassy-stm32/src/dma/mod.rs
View File

@ -5,6 +5,9 @@ mod dma;
#[cfg(dmamux)]
mod dmamux;
#[cfg(dmamux)]
pub use dmamux::*;
use core::future::Future;
use embassy::util::Unborrow;

10
embassy-stm32/src/usart/mod.rs
View File

@ -172,13 +172,19 @@ crate::pac::peripheral_pins!(
macro_rules! impl_dma {
($inst:ident, {dmamux: $dmamux:ident}, $signal:ident, $request:expr) => {
impl<T: crate::dma::Channel> sealed::$signal<peripherals::$inst> for T {
impl<T> sealed::$signal<peripherals::$inst> for T
where
T: crate::dma::MuxChannel<Mux = crate::dma::$dmamux>,
{
fn request(&self) -> dma::Request {
$request
}
}
impl<T: crate::dma::Channel> $signal<peripherals::$inst> for T {}
impl<T> $signal<peripherals::$inst> for T where
T: crate::dma::MuxChannel<Mux = crate::dma::$dmamux>
{
}
};
($inst:ident, {channel: $channel:ident}, $signal:ident, $request:expr) => {
impl sealed::$signal<peripherals::$inst> for peripherals::$channel {