Added ADC support + examples

Author: Cor Peters

examples/adc-continious.rs

@@ -0,0 +1,70 @@
+#![no_main]
+#![no_std]
+
+use crate::hal::{
+    adc::{
+        config::{Continuous, SampleTime, Sequence},
+        AdcClaim, ClockSource, Temperature, Vref,
+    },
+    gpio::GpioExt,
+    rcc::{Config, RccExt},
+    stm32::Peripherals,
+};
+use stm32g4xx_hal as hal;
+
+use cortex_m_rt::entry;
+
+use log::info;
+
+#[macro_use]
+mod utils;
+
+#[entry]
+fn main() -> ! {
+    utils::logger::init();
+
+    info!("start");
+
+    let dp = Peripherals::take().unwrap();
+    let mut cp = cortex_m::Peripherals::take().expect("cannot take core peripherals");
+
+    info!("rcc");
+
+    let rcc = dp.RCC.constrain();
+    let mut rcc = rcc.freeze(Config::hsi());
+
+    info!("Setup Gpio");
+    let gpioa = dp.GPIOA.split(&mut rcc);
+    let pa0 = gpioa.pa0.into_analog();
+
+    info!("Setup Adc1");
+    let (mut adc, syst) = dp.ADC1.claim(ClockSource::SystemClock, &rcc, cp.SYST);
+    cp.SYST = syst;
+
+    adc.enable_temperature(&dp.ADC12_COMMON);
+    adc.enable_vref(&dp.ADC12_COMMON);
+    adc.set_auto_delay(true);
+    adc.set_continuous(Continuous::Continuous);
+    adc.reset_sequence();
+    adc.configure_channel(&pa0, Sequence::One, SampleTime::Cycles_640_5);
+    adc.configure_channel(&Vref, Sequence::Two, SampleTime::Cycles_640_5);
+    adc.configure_channel(&Temperature, Sequence::Three, SampleTime::Cycles_640_5);
+    let adc = adc.enable();
+
+    info!("Enter Loop");
+    let mut adc = adc.start_conversion();
+
+    loop {
+        adc = adc.wait_for_conversion_sequence().unwrap_active();
+        let millivolts = adc.sample_to_millivolts(adc.current_sample());
+        info!("pa3: {}mV", millivolts);
+
+        adc = adc.wait_for_conversion_sequence().unwrap_active();
+        let millivolts = Vref::sample_to_millivolts(adc.current_sample());
+        info!("vref: {}mV", millivolts);
+
+        adc = adc.wait_for_conversion_sequence().unwrap_active();
+        let millivolts = Temperature::temperature_to_degrees_centigrade(adc.current_sample());
+        info!("temp: {}℃C", millivolts); // Note: Temperature seems quite low...
+    }
+}

examples/adc-one-shot.rs

@@ -0,0 +1,52 @@
+#![no_main]
+#![no_std]
+
+use crate::hal::{
+    adc::{config::SampleTime, AdcClaim, ClockSource},
+    rcc::Config,
+    stm32::Peripherals,
+};
+use hal::prelude::*;
+use stm32g4xx_hal as hal;
+
+use cortex_m_rt::entry;
+
+use log::info;
+
+#[macro_use]
+mod utils;
+
+#[entry]
+fn main() -> ! {
+    utils::logger::init();
+
+    info!("start");
+
+    let dp = Peripherals::take().unwrap();
+    let mut cp = cortex_m::Peripherals::take().expect("cannot take core peripherals");
+
+    info!("rcc");
+
+    let rcc = dp.RCC.constrain();
+    let mut rcc = rcc.freeze(Config::hsi());
+
+    info!("Setup Adc1");
+
+    let (mut adc, syst) = dp.ADC1.claim(ClockSource::SystemClock, &rcc, cp.SYST);
+    cp.SYST = syst;
+
+    info!("Setup Gpio");
+
+    let gpioa = dp.GPIOA.split(&mut rcc);
+    let pa0 = gpioa.pa0.into_analog();
+
+    info!("Enter Loop");
+
+    loop {
+        info!("Convert");
+        let sample = adc.convert(&pa0, SampleTime::Cycles_640_5);
+        info!("sample to mv");
+        let millivolts = adc.sample_to_millivolts(sample);
+        info!("pa3: {}mV", millivolts);
+    }
+}