Add ADC example

Author: hannobraun

Cargo.toml

@@ -88,6 +88,10 @@ debug = true
 lto = true
 
 
+[[example]]
+name = "adc"
+required-features = ["rt", "stm32l4x3"]
+
 [[example]]
 name = "irq_button"
 required-features = ["rt"]

examples/adc.rs

@@ -0,0 +1,36 @@
+#![no_main]
+#![no_std]
+
+use panic_rtt_target as _;
+
+use cortex_m_rt::entry;
+use rtt_target::{rprint, rprintln};
+use stm32l4xx_hal::{adc::ADC, delay::Delay, pac, prelude::*};
+
+#[entry]
+fn main() -> ! {
+    rtt_target::rtt_init_print!();
+    rprint!("Initializing...");
+
+    let cp = pac::CorePeripherals::take().unwrap();
+    let dp = pac::Peripherals::take().unwrap();
+
+    let mut rcc = dp.RCC.constrain();
+    let mut flash = dp.FLASH.constrain();
+    let mut pwr = dp.PWR.constrain(&mut rcc.apb1r1);
+
+    let clocks = rcc.cfgr.freeze(&mut flash.acr, &mut pwr);
+
+    let mut delay = Delay::new(cp.SYST, clocks);
+    let mut adc = ADC::new(dp.ADC, &mut rcc.ahb2, &mut rcc.ccipr, &mut delay);
+
+    let mut gpioc = dp.GPIOC.split(&mut rcc.ahb2);
+    let mut a1 = gpioc.pc0.into_analog(&mut gpioc.moder, &mut gpioc.pupdr);
+
+    rprintln!(" done.");
+
+    loop {
+        let value = adc.read(&mut a1).unwrap();
+        rprintln!("Value: {}", value);
+    }
+}