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Merge pull request #2017 from ilya-epifanov/rp-adc-div

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added sampling frequency setting to adc capture methods on rp2040
This commit is contained in:
Dario Nieuwenhuis 2023-10-20 01:47:27 +00:00 committed by GitHub
commit 88ada52146
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 16 additions and 4 deletions
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8
embassy-rp/src/adc.rs
View file

@ -213,6 +213,7 @@ impl<'d> Adc<'d, Async> {
ch: &mut Channel<'_>,
buf: &mut [W],
fcs_err: bool,
div: u16,
dma: impl Peripheral<P = impl dma::Channel>,
) -> Result<(), Error> {
let r = Self::regs();
@ -258,6 +259,7 @@ impl<'d> Adc<'d, Async> {
// start conversions and wait for dma to finish. we can't report errors early
// because there's no interrupt to signal them, and inspecting every element
// of the fifo is too costly to do here.
r.div().write_set(|w| w.set_int(div));
r.cs().write_set(|w| w.set_start_many(true));
dma.await;
mem::drop(auto_reset);
@ -275,9 +277,10 @@ impl<'d> Adc<'d, Async> {
&mut self,
ch: &mut Channel<'_>,
buf: &mut [S],
div: u16,
dma: impl Peripheral<P = impl dma::Channel>,
) -> Result<(), Error> {
self.read_many_inner(ch, buf, false, dma).await
self.read_many_inner(ch, buf, false, div, dma).await
}
#[inline]
@ -285,11 +288,12 @@ impl<'d> Adc<'d, Async> {
&mut self,
ch: &mut Channel<'_>,
buf: &mut [Sample],
div: u16,
dma: impl Peripheral<P = impl dma::Channel>,
) {
// errors are reported in individual samples
let _ = self
.read_many_inner(ch, unsafe { mem::transmute::<_, &mut [u16]>(buf) }, true, dma)
.read_many_inner(ch, unsafe { mem::transmute::<_, &mut [u16]>(buf) }, true, div, dma)
.await;
}
}

10
tests/rp/src/bin/adc.rs
View file

@ -93,6 +93,7 @@ async fn main(_spawner: Spawner) {
adc.read_many(
&mut Channel::new_pin(&mut p.PIN_29, Pull::Down),
&mut low,
1,
&mut p.DMA_CH0,
)
.await
@ -100,11 +101,17 @@ async fn main(_spawner: Spawner) {
adc.read_many(
&mut Channel::new_pin(&mut p.PIN_29, Pull::None),
&mut none,
1,
&mut p.DMA_CH0,
)
.await
.unwrap();
adc.read_many_raw(&mut Channel::new_pin(&mut p.PIN_29, Pull::Up), &mut up, &mut p.DMA_CH0)
adc.read_many_raw(
&mut Channel::new_pin(&mut p.PIN_29, Pull::Up),
&mut up,
1,
&mut p.DMA_CH0,
)
.await;
defmt::assert!(low.iter().zip(none.iter()).all(|(l, n)| *l >> 4 < *n as u16));
defmt::assert!(up.iter().all(|s| s.good()));
@ -115,6 +122,7 @@ async fn main(_spawner: Spawner) {
adc.read_many(
&mut Channel::new_temp_sensor(&mut p.ADC_TEMP_SENSOR),
&mut temp,
1,
&mut p.DMA_CH0,
)
.await