35 lines
1 KiB
Rust
35 lines
1 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::adc::{Adc, SampleTime};
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use embassy_time::{Delay, Duration, Timer};
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_stm32::init(Default::default());
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info!("Hello World!");
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let mut adc = Adc::new(p.ADC, &mut Delay);
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adc.set_sample_time(SampleTime::Cycles71_5);
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let mut pin = p.PA1;
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let mut vrefint = adc.enable_vref(&mut Delay);
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let vrefint_sample = adc.read_internal(&mut vrefint);
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let convert_to_millivolts = |sample| {
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// From https://www.st.com/resource/en/datasheet/stm32f031c6.pdf
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// 6.3.4 Embedded reference voltage
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const VREFINT_MV: u32 = 1230; // mV
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(u32::from(sample) * VREFINT_MV / u32::from(vrefint_sample)) as u16
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};
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loop {
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let v = adc.read(&mut pin);
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info!("--> {} - {} mV", v, convert_to_millivolts(v));
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Timer::after(Duration::from_millis(100)).await;
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}
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}
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