From 62d6bb6c8a5cee402c917dbad5d3b7d900239aab Mon Sep 17 00:00:00 2001
From: Ilya Epifanov <elijah.epifanov@gmail.com>
Date: Fri, 6 Oct 2023 14:29:12 +0200
Subject: [PATCH 1/2] added sampling frequency setting to adc capture methods
 on rp2040

---
 embassy-rp/src/adc.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/embassy-rp/src/adc.rs b/embassy-rp/src/adc.rs
index bac45574..5b913f15 100644
--- a/embassy-rp/src/adc.rs
+++ b/embassy-rp/src/adc.rs
@@ -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;
     }
 }

From 0c97ce2fcc715ffe954d34bfa5b927038e913560 Mon Sep 17 00:00:00 2001
From: Ilya Epifanov <elijah.epifanov@gmail.com>
Date: Mon, 9 Oct 2023 11:00:40 +0200
Subject: [PATCH 2/2] fixed rp adc tests

---
 tests/rp/src/bin/adc.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tests/rp/src/bin/adc.rs b/tests/rp/src/bin/adc.rs
index 0250fd5f..0c04a55f 100644
--- a/tests/rp/src/bin/adc.rs
+++ b/tests/rp/src/bin/adc.rs
@@ -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
@@ -100,12 +101,18 @@ 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)
-            .await;
+        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()));
         defmt::assert!(none.iter().zip(up.iter()).all(|(n, u)| (*n as u16) < u.value()));
@@ -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