Added ADC support for STM32C0.

1 files changed, 57 insertions, 0 deletions

diff --git a/examples/stm32c0/src/bin/adc.rs b/examples/stm32c0/src/bin/adc.rs
new file mode 100644
index 000000000..10481f4d2
--- /dev/null
+++ b/examples/stm32c0/src/bin/adc.rs
@@ -0,0 +1,57 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::adc::vals::Scandir;
+use embassy_stm32::adc::{Adc, AdcChannel, AnyAdcChannel, Resolution, SampleTime};
+use embassy_stm32::peripherals::ADC1;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let config = Default::default();
+    let p = embassy_stm32::init(config);
+
+    info!("ADC STM32C0 example.");
+
+    // We need to set certain sample time to be able to read temp sensor.
+    let mut adc = Adc::new(p.ADC1, SampleTime::CYCLES12_5, Resolution::BITS12);
+    let mut temp = adc.enable_temperature().degrade_adc();
+    let mut vref = adc.enable_vrefint().degrade_adc();
+    let mut pin0 = p.PA0.degrade_adc();
+
+    let mut dma = p.DMA1_CH1;
+    let mut read_buffer: [u16; 3] = [0; 3];
+
+    loop {
+        info!("============================");
+        let blocking_temp = adc.blocking_read(&mut temp);
+        let blocking_vref = adc.blocking_read(&mut vref);
+        let blocing_pin0 = adc.blocking_read(&mut pin0);
+        info!(
+            "Blocking ADC read: vref = {}, temp = {}, pin0 = {}.",
+            blocking_vref, blocking_temp, blocing_pin0
+        );
+
+        let channels_seqence: [&mut AnyAdcChannel<ADC1>; 3] = [&mut vref, &mut temp, &mut pin0];
+        adc.read(&mut dma, channels_seqence.into_iter(), &mut read_buffer).await;
+        // Values are ordered according to hardware ADC channel number!
+        info!(
+            "DMA ADC read in set: vref = {}, temp = {}, pin0 = {}.",
+            read_buffer[0], read_buffer[1], read_buffer[2]
+        );
+
+        let hw_channel_selection: u32 =
+            (1 << temp.get_hw_channel()) + (1 << vref.get_hw_channel()) + (1 << pin0.get_hw_channel());
+        adc.read_in_hw_order(&mut dma, hw_channel_selection, Scandir::UP, &mut read_buffer)
+            .await;
+        info!(
+            "DMA ADC read in hardware order: vref = {}, temp = {}, pin0 = {}.",
+            read_buffer[2], read_buffer[1], read_buffer[0]
+        );
+
+        Timer::after_millis(2000).await;
+    }
+}