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#![macro_use]
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use crate::pac;
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use crate::pac::bdma_channels;
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use crate::pac::dma_requests;
use crate::pac::peripherals;
use crate::peripherals;
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/*
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#[allow(unused)]
pub(crate) async unsafe fn transfer_m2p(
ch: &mut impl Channel,
ch_func: u8,
src: &[u8],
dst: *mut u8,
) {
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defmt::info!(
"m2p {} func {} {}-{}",
src.len(),
ch_func,
ch.num(),
ch.dma_ch_num()
);
let n = ch.num();
STATE.ch_status[n].store(CH_STATUS_NONE, Ordering::Release);
let ch_regs = ch.regs();
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let dmamux_regs = ch.dmamux_regs();
let ch_mux_regs = dmamux_regs.ccr(ch.dmamux_ch_num() as _);
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ch_mux_regs.write(|reg| {
// one request?
reg.set_nbreq(0);
reg.set_dmareq_id(ch_func);
});
ch_mux_regs.modify(|reg| {
reg.set_ege(true);
//reg.set_se(true);
//reg.set_soie(true);
});
ch_regs.par().write_value(dst as _);
ch_regs.mar().write_value(src.as_ptr() as _);
ch_regs.ndtr().write_value(regs::Ndtr(src.len() as _));
ch_regs.cr().write(|reg| {
reg.set_dir(vals::Dir::FROMMEMORY);
reg.set_msize(vals::Size::BITS8);
reg.set_minc(vals::Inc::ENABLED);
reg.set_pinc(vals::Inc::DISABLED);
reg.set_teie(true);
reg.set_tcie(true);
reg.set_en(true);
});
let res = poll_fn(|cx| {
defmt::info!("poll");
STATE.ch_wakers[n].register(cx.waker());
match STATE.ch_status[n].load(Ordering::Acquire) {
CH_STATUS_NONE => Poll::Pending,
x => Poll::Ready(x),
}
})
.await;
defmt::info!("cr {:b}", ch_regs.cr().read().0);
ch_regs.cr().modify(|reg| {
reg.set_en(false);
});
ch_mux_regs.modify(|reg| {
reg.set_ege(false);
//reg.set_se(true);
//reg.set_soie(true);
});
// TODO handle error
assert!(res == CH_STATUS_COMPLETED);
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}
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*/
pub(crate) unsafe fn configure_dmamux(
dmamux_regs: pac::dmamux::Dmamux,
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dmamux_ch_num: u8,
request: u8,
) {
let ch_mux_regs = dmamux_regs.ccr(dmamux_ch_num as _);
ch_mux_regs.write(|reg| {
// one request?
reg.set_nbreq(0);
reg.set_dmareq_id(request);
});
ch_mux_regs.modify(|reg| {
reg.set_ege(true);
//reg.set_se(true);
//reg.set_soie(true);
});
}
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pub(crate) mod sealed {
use super::*;
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pub trait DmaMux {
fn regs() -> pac::dmamux::Dmamux;
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}
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pub trait Channel {
fn dmamux_regs(&self) -> pac::dmamux::Dmamux;
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fn dmamux_ch_num(&self) -> u8;
}
pub trait PeripheralChannel<PERI, OP>: Channel {
fn request(&self) -> u8;
}
}
pub trait DmaMux: sealed::DmaMux {}
pub trait Channel: sealed::Channel {}
pub trait PeripheralChannel<PERI, OP>: sealed::Channel {}
pub struct P2M;
pub struct M2P;
#[allow(unused)]
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macro_rules! impl_dma_channel {
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($channel_peri:ident, $dmamux_peri:ident, $channel_num:expr, $dma_peri: ident, $dma_num:expr) => {
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impl Channel for peripherals::$channel_peri {}
impl sealed::Channel for peripherals::$channel_peri {
fn dmamux_regs(&self) -> pac::dmamux::Dmamux {
crate::pac::$dmamux_peri
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}
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fn dmamux_ch_num(&self) -> u8 {
($dma_num * 8) + $channel_num
}
}
};
}
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macro_rules! impl_dmamux {
($peri:ident) => {
impl sealed::DmaMux for peripherals::$peri {
fn regs() -> pac::dmamux::Dmamux {
pac::$peri
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}
}
impl DmaMux for peripherals::$peri {}
};
}
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peripherals! {
(bdma, DMA1) => {
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bdma_channels! {
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($channel_peri:ident, DMA1, $channel_num:expr) => {
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impl_dma_channel!($channel_peri, DMAMUX1, $channel_num, DMA1, 0);
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};
}
};
(bdma, DMA2) => {
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bdma_channels! {
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($channel_peri:ident, DMA2, $channel_num:expr) => {
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impl_dma_channel!($channel_peri, DMAMUX1, $channel_num, DMA2, 1);
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};
}
};
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(bdma, BDMA) => {
bdma_channels! {
($channel_peri:ident, BDMA, $channel_num:expr) => {
impl_dma_channel!($channel_peri, DMAMUX1, $channel_num, DMA2, 1);
};
}
};
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(dmamux, DMAMUX1) => {
impl_dmamux!(DMAMUX1);
};
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}
#[allow(unused)]
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macro_rules! impl_usart_dma_requests {
($channel_peri:ident, $dma_peri:ident, $channel_num:expr) => {
dma_requests! {
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// TODO: DRY this up.
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(usart, $peri:ident, RX, $request:expr) => {
impl sealed::PeripheralChannel<peripherals::$peri, P2M> for peripherals::$channel_peri {
fn request(&self) -> u8 {
$request
}
}
impl PeripheralChannel<peripherals::$peri, P2M> for peripherals::$channel_peri { }
};
(usart, $peri:ident, TX, $request:expr) => {
impl sealed::PeripheralChannel<peripherals::$peri, M2P> for peripherals::$channel_peri {
fn request(&self) -> u8 {
$request
}
}
impl PeripheralChannel<peripherals::$peri, M2P> for peripherals::$channel_peri { }
};
(uart, $peri:ident, TX, $request:expr) => {
impl sealed::PeripheralChannel<peripherals::$peri, P2M> for peripherals::$channel_peri {
fn request(&self) -> u8 {
$request
}
}
impl PeripheralChannel<peripherals::$peri, P2M> for peripherals::$channel_peri { }
};
(uart, $peri:ident, RX, $request:expr) => {
impl sealed::PeripheralChannel<peripherals::$peri, M2P> for peripherals::$channel_peri {
fn request(&self) -> u8 {
$request
}
}
impl PeripheralChannel<peripherals::$peri, M2P> for peripherals::$channel_peri { }
};
}
};
}
#[allow(unused)]
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#[cfg(usart)]
use crate::usart;
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bdma_channels! {
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($channel_peri:ident, $dma_peri:ident, $channel_num:expr) => {
impl_usart_dma_requests!($channel_peri, $dma_peri, $channel_num);
};
}
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/// safety: must be called only once
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pub(crate) unsafe fn init() {}