62 lines
1.2 KiB
Rust
62 lines
1.2 KiB
Rust
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#![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) 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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macro_rules! dma_num {
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(DMA1) => {
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0
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};
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(DMA2) => {
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1
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};
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(BDMA) => {
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0
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};
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}
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macro_rules! dmamux_peri {
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(DMA1) => {
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crate::pac::DMAMUX1
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};
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(DMA2) => {
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crate::pac::DMAMUX1
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};
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(BDMA) => {
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crate::pac::DMAMUX1
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};
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}
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pac::bdma_channels! {
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($channel_peri:ident, $dma_peri:ident, $channel_num:expr) => {
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impl MuxChannel for peripherals::$channel_peri {
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const DMAMUX_CH_NUM: u8 = (dma_num!($dma_peri) * 8) + $channel_num;
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const DMAMUX_REGS: pac::dmamux::Dmamux = dmamux_peri!($dma_peri);
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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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