53 lines
1.3 KiB
Rust
53 lines
1.3 KiB
Rust
#![macro_use]
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use crate::{pac, peripherals};
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pub(crate) fn configure_dmamux<M: MuxChannel>(channel: &mut M, request: u8) {
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let ch_mux_regs = channel.mux_regs().ccr(channel.mux_num());
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ch_mux_regs.write(|reg| {
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reg.set_nbreq(0);
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reg.set_dmareq_id(request);
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});
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ch_mux_regs.modify(|reg| {
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reg.set_ege(true);
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});
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}
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pub(crate) mod dmamux_sealed {
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use super::*;
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pub trait MuxChannel {
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fn mux_regs(&self) -> pac::dmamux::Dmamux;
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fn mux_num(&self) -> usize;
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}
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}
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pub struct DMAMUX1;
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#[cfg(stm32h7)]
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pub struct DMAMUX2;
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pub trait MuxChannel: dmamux_sealed::MuxChannel {
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type Mux;
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}
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foreach_dma_channel! {
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($channel_peri:ident, $dma_peri:ident, $version:ident, $channel_num:expr, $index:expr, {dmamux: $dmamux:ident, dmamux_channel: $dmamux_channel:expr}) => {
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impl dmamux_sealed::MuxChannel for peripherals::$channel_peri {
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fn mux_regs(&self) -> pac::dmamux::Dmamux {
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pac::$dmamux
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}
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fn mux_num(&self) -> usize {
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$dmamux_channel
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}
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}
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impl MuxChannel for peripherals::$channel_peri {
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type Mux = $dmamux;
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}
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};
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}
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/// safety: must be called only once
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pub(crate) unsafe fn init(_cs: critical_section::CriticalSection) {
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crate::_generated::init_dmamux();
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}
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