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Fix example

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This commit is contained in:
Grant Miller 2023-04-05 15:12:27 -05:00
parent f588105429
commit efd9e18321
1 changed files with 12 additions and 3 deletions
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15
examples/stm32f0/src/bin/adc.rs
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@ -16,12 +16,21 @@ async fn main(_spawner: Spawner) {
let mut adc = Adc::new(p.ADC, &mut Delay);
adc.set_sample_time(SampleTime::Cycles71_5);
let mut pin = p.PA1;
let mut vref = adc.enable_temperature(&mut Delay);
let mut vrefint = adc.enable_vref(&mut Delay);
let vrefint_sample = adc.read_internal(&mut vrefint);
let convert_to_millivolts = |sample| {
// FIXME: use proper datasheet and value
// From http://www.st.com/resource/en/datasheet/CD00161566.pdf
// 5.3.4 Embedded reference voltage
const VREFINT_MV: u32 = 1200; // mV
(u32::from(sample) * VREFINT_MV / u32::from(vrefint_sample)) as u16
};
loop {
let v = adc.read(&mut pin);
let r = adc.read_internal(&mut vref);
info!("--> {} - {} mV / vref = {} - {} mV", v, adc.to_millivolts(v), r, adc.to_millivolts(r));
info!("--> {} - {} mV", v, convert_to_millivolts(v));
Timer::after(Duration::from_millis(100)).await;
}
}