mspm0-adc: add adc with examples

1 files changed, 48 insertions, 0 deletions

diff --git a/examples/mspm0g3507/src/bin/adc.rs b/examples/mspm0g3507/src/bin/adc.rs
new file mode 100644
index 000000000..fed8b9dd3
--- /dev/null
+++ b/examples/mspm0g3507/src/bin/adc.rs
@@ -0,0 +1,48 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_mspm0::adc::{self, Adc, AdcChannel, AdcConfig, Resolution, Vrsel};
+use embassy_mspm0::{bind_interrupts, peripherals, Config};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_halt as _};
+
+bind_interrupts!(struct Irqs {
+    ADC0 => adc::InterruptHandler<peripherals::ADC0>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
+    info!("Hello world!");
+    let p = embassy_mspm0::init(Config::default());
+
+    let adc_config = AdcConfig {
+        resolution: Resolution::BIT12,
+        vr_select: Vrsel::VddaVssa,
+        sample_time: 50,
+    };
+
+    // Configure adc with sequence 0 to 1
+    let mut adc = Adc::new_async(p.ADC0, adc_config, Irqs);
+    let pin1 = p.PA22.degrade_adc();
+    let pin2 = p.PB20.degrade_adc();
+    let sequence = [(&pin1, Vrsel::VddaVssa), (&pin2, Vrsel::VddaVssa)];
+    let mut readings = [0u16; 2];
+    let mut pin3 = p.PA27;
+
+    loop {
+        let r = adc.read_channel(&mut pin3).await;
+        info!("Raw adc PA27: {}", r);
+        // With a voltage range of 0-3.3V and a resolution of 12 bits, the raw value can be
+        // approximated to voltage (~0.0008 per step).
+        let mut x = r as u32;
+        x = x * 8;
+        info!("Adc voltage PA27: {},{:#04}", x / 10_000, x % 10_000);
+        // Read a sequence of channels
+        adc.read_sequence(sequence.into_iter(), &mut readings).await;
+        info!("Raw adc sequence: {}", readings);
+
+        Timer::after_millis(400).await;
+    }
+}