44 lines
1.3 KiB
Rust
44 lines
1.3 KiB
Rust
//! adc oversampling example
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//!
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//! This example uses adc oversampling to achieve 16bit data
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#![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::{Adc, SampleTime};
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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 p = embassy_stm32::init(Default::default());
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info!("Adc oversample test");
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let mut adc = Adc::new(p.ADC1);
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adc.set_sample_time(SampleTime::CYCLES1_5);
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let mut pin = p.PA1;
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// From https://www.st.com/resource/en/reference_manual/rm0444-stm32g0x1-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
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// page373 15.8 Oversampler
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// Table 76. Maximum output results vs N and M. Grayed values indicates truncation
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// 0x00 oversampling ratio X2
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// 0x01 oversampling ratio X4
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// 0x02 oversampling ratio X8
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// 0x03 oversampling ratio X16
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// 0x04 oversampling ratio X32
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// 0x05 oversampling ratio X64
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// 0x06 oversampling ratio X128
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// 0x07 oversampling ratio X256
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adc.set_oversampling_ratio(0x03);
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adc.set_oversampling_shift(0b0000);
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adc.oversampling_enable(true);
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loop {
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let v = adc.blocking_read(&mut pin);
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info!("--> {} ", v); //max 65520 = 0xFFF0
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Timer::after_millis(100).await;
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}
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}
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