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|
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::Config;
use embassy_stm32::adc::{Adc, AdcChannel, RegularConversionMode, SampleTime};
use {defmt_rtt as _, panic_probe as _};
const DMA_BUF_LEN: usize = 512;
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
info!("Hello World!");
let mut config = Config::default();
{
use embassy_stm32::rcc::*;
config.rcc.mux.adcsel = mux::Adcsel::SYS;
}
let p = embassy_stm32::init(config);
let adc = Adc::new(p.ADC1);
let adc_pin0 = p.PA0.degrade_adc();
let adc_pin1 = p.PA1.degrade_adc();
let mut adc_dma_buf = [0u16; DMA_BUF_LEN];
let mut measurements = [0u16; DMA_BUF_LEN / 2];
let mut ring_buffered_adc = adc.into_ring_buffered(
p.DMA1_CH1,
&mut adc_dma_buf,
[(adc_pin0, SampleTime::CYCLES640_5), (adc_pin1, SampleTime::CYCLES640_5)].into_iter(),
RegularConversionMode::Continuous,
);
info!("starting measurement loop");
loop {
match ring_buffered_adc.read(&mut measurements).await {
Ok(_) => {
//note: originally there was a print here showing all the samples,
//but even that takes too much time and would cause adc overruns
info!("adc1 first 10 samples: {}", measurements[0..10]);
}
Err(e) => {
warn!("Error: {:?}", e);
}
}
}
}
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