Add ADC support for H7

examples/stm32h7/Cargo.toml

@@ -8,7 +8,7 @@ resolver = "2"
 [features]
 
 [dependencies]
-embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "defmt-timestamp-uptime"] }
+embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits"] }
 embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "defmt", "stm32h743bi", "net", "time-driver-any", "exti", "unstable-pac", "unstable-traits"] }
 embassy-net = { path = "../../embassy-net", default-features = false, features = ["defmt", "tcp", "medium-ethernet", "pool-16"] }
 

examples/stm32h7/src/bin/adc.rs

@@ -0,0 +1,42 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use embassy::executor::Spawner;
+use embassy::time::{Delay, Duration, Timer};
+use embassy_stm32::adc::{Adc, SampleTime};
+use embassy_stm32::rcc::AdcClockSource;
+use embassy_stm32::time::U32Ext;
+use embassy_stm32::{Config, Peripherals};
+
+use defmt::*;
+use defmt_rtt as _; // global logger
+use panic_probe as _;
+
+pub fn config() -> Config {
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(400.mhz().into());
+    config.rcc.hclk = Some(200.mhz().into());
+    config.rcc.per_ck = Some(64.mhz().into());
+    config.rcc.adc_clock_source = AdcClockSource::PerCk;
+    config
+}
+
+#[embassy::main(config = "config()")]
+async fn main(_spawner: Spawner, mut p: Peripherals) {
+    info!("Hello World!");
+
+    let mut adc = Adc::new(p.ADC3, &mut Delay);
+
+    adc.set_sample_time(SampleTime::Cycles32_5);
+
+    let mut vref_channel = adc.enable_vref();
+
+    loop {
+        let vref = adc.read_internal(&mut vref_channel);
+        info!("vref: {}", vref);
+        let measured = adc.read(&mut p.PC0);
+        info!("measured: {}", measured);
+        Timer::after(Duration::from_millis(500)).await;
+    }
+}