47 lines
1.1 KiB
Rust
47 lines
1.1 KiB
Rust
use stm32f4xx_hal::{
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adc::{
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Adc,
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config::*,
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},
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gpio::{Analog, gpioa::PA3 as Pin},
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stm32::ADC1 as ADC,
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};
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/// ADC Input
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pub struct AdcInput {
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/// unused but consumed
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_pin: Pin<Analog>,
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adc: Adc<ADC>,
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}
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impl AdcInput {
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/// Configure pin into analog mode
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pub fn new<MODE>(adc: ADC, pin: Pin<MODE>) -> Self {
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let pin = pin.into_analog();
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let adc_config = AdcConfig::default()
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.scan(Scan::Enabled)
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.continuous(Continuous::Single)
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.clock(Clock::Pclk2_div_2);
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let mut adc = Adc::adc1(adc, true, adc_config);
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adc.configure_channel(&pin, Sequence::One, SampleTime::Cycles_480);
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AdcInput { _pin: pin, adc }
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}
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/// Enable the ADC,
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/// run a conversion
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/// disable the ADC
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pub fn read(&mut self) -> u16 {
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let adc = &mut self.adc;
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adc.enable();
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adc.clear_end_of_conversion_flag();
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adc.start_conversion();
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let sample = adc.current_sample();
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let result = adc.sample_to_millivolts(sample);
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adc.wait_for_conversion_sequence();
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adc.disable();
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result
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}
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}
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