60 lines
1.5 KiB
Rust
60 lines
1.5 KiB
Rust
#![macro_use]
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use crate::pac;
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use crate::peripherals;
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pub(crate) unsafe fn configure_dmamux(
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dmamux_regs: pac::dmamux::Dmamux,
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dmamux_ch_num: u8,
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request: u8,
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) {
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let ch_mux_regs = dmamux_regs.ccr(dmamux_ch_num as _);
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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 sealed {
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use super::*;
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pub trait MuxChannel {
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const DMAMUX_CH_NUM: u8;
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const DMAMUX_REGS: pac::dmamux::Dmamux;
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}
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}
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pub struct DMAMUX1;
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#[cfg(rcc_h7)]
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pub struct DMAMUX2;
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pub trait MuxChannel: sealed::MuxChannel + super::Channel {
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type Mux;
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}
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pac::dma_channels! {
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($channel_peri:ident, $dma_peri:ident, $version:ident, $channel_num:expr, {dmamux: $dmamux:ident, dmamux_channel: $dmamux_channel:expr}) => {
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impl sealed::MuxChannel for peripherals::$channel_peri {
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const DMAMUX_CH_NUM: u8 = $dmamux_channel;
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const DMAMUX_REGS: pac::dmamux::Dmamux = pac::$dmamux;
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}
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impl MuxChannel for peripherals::$channel_peri {
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type Mux = $dmamux;
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}
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};
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}
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/// safety: must be called only once
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pub(crate) unsafe fn init() {
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crate::pac::peripheral_rcc! {
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($name:ident, dmamux, DMAMUX, $clock:ident, ($reg:ident, $field:ident, $set_field:ident), $rst:tt) => {
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crate::pac::RCC.$reg().modify(|reg| {
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reg.$set_field(true);
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});
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};
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}
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}
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