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Don't increment read address in DMA copy from peripherals

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Mathias
2022-08-18 21:14:57 +02:00
parent 1d49b3444f
commit debff0980d
2 changed files with 16 additions and 10 deletions
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12
embassy-rp/src/dma.rs
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@@ -10,7 +10,11 @@ use pac::dma::vals::DataSize;
use crate::pac::dma::vals;
use crate::{pac, peripherals};
pub(crate) fn read<'a, C: Channel, W: Word>(ch: impl Peripheral<P = C> + 'a, from: *const W, to: *mut [W]) -> Transfer<'a, C> {
pub(crate) fn read<'a, C: Channel, W: Word>(
ch: impl Peripheral<P = C> + 'a,
from: *const W,
to: *mut [W],
) -> Transfer<'a, C> {
let (ptr, len) = crate::dma::slice_ptr_parts_mut(to);
copy(ch, from as *const u32, ptr as *mut u32, len, W::size())
}
@@ -44,7 +48,7 @@ fn copy<'a, C: Channel>(
p.ctrl_trig().write(|w| {
w.set_data_size(data_size);
w.set_incr_read(true);
w.set_incr_read(false);
w.set_incr_write(true);
w.set_chain_to(ch.number());
w.set_en(true);
@@ -136,7 +140,9 @@ pub trait Channel: Peripheral<P = Self> + sealed::Channel + Into<AnyChannel> + S
STATE.channels[self.number() as usize].waker.register(waker);
}
fn on_irq() {}
fn on_irq() {
// FIXME:
}
fn degrade(self) -> AnyChannel {
AnyChannel { number: self.number() }