58 lines
2.1 KiB
Rust
58 lines
2.1 KiB
Rust
#![no_std]
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#![no_main]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::adc::vals::Scandir;
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use embassy_stm32::adc::{Adc, AdcChannel, AnyAdcChannel, Resolution, SampleTime};
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use embassy_stm32::peripherals::ADC1;
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use embassy_time::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 config = Default::default();
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let p = embassy_stm32::init(config);
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info!("ADC STM32C0 example.");
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// We need to set certain sample time to be able to read temp sensor.
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let mut adc = Adc::new(p.ADC1, SampleTime::CYCLES12_5, Resolution::BITS12);
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let mut temp = adc.enable_temperature().degrade_adc();
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let mut vref = adc.enable_vrefint().degrade_adc();
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let mut pin0 = p.PA0.degrade_adc();
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let mut dma = p.DMA1_CH1;
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let mut read_buffer: [u16; 3] = [0; 3];
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loop {
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info!("============================");
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let blocking_temp = adc.blocking_read(&mut temp);
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let blocking_vref = adc.blocking_read(&mut vref);
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let blocing_pin0 = adc.blocking_read(&mut pin0);
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info!(
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"Blocking ADC read: vref = {}, temp = {}, pin0 = {}.",
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blocking_vref, blocking_temp, blocing_pin0
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);
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let channels_seqence: [&mut AnyAdcChannel<ADC1>; 3] = [&mut vref, &mut temp, &mut pin0];
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adc.read(&mut dma, channels_seqence.into_iter(), &mut read_buffer).await;
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// Values are ordered according to hardware ADC channel number!
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info!(
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"DMA ADC read in set: vref = {}, temp = {}, pin0 = {}.",
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read_buffer[0], read_buffer[1], read_buffer[2]
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);
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let hw_channel_selection: u32 =
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(1 << temp.get_hw_channel()) + (1 << vref.get_hw_channel()) + (1 << pin0.get_hw_channel());
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adc.read_in_hw_order(&mut dma, hw_channel_selection, Scandir::UP, &mut read_buffer)
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.await;
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info!(
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"DMA ADC read in hardware order: vref = {}, temp = {}, pin0 = {}.",
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read_buffer[2], read_buffer[1], read_buffer[0]
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);
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Timer::after_millis(2000).await;
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}
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}
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