ced8088fe9
* Make ADC reads return u16s, not generic types * Changelog entry * Add the PR number to the changelog --------- Co-authored-by: Jesse Braham <jessebraham@users.noreply.github.com>
59 lines
1.6 KiB
Rust
59 lines
1.6 KiB
Rust
//! Connect a potentiometer to PIN2 and see the read values change when
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//! rotating the shaft. Alternatively you could also connect the PIN to GND or
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//! 3V3 to see the maximum and minimum raw values read.
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#![no_std]
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#![no_main]
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use esp32c3_hal::{
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adc,
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adc::{AdcConfig, Attenuation, ADC, ADC1},
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clock::ClockControl,
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gpio::IO,
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peripherals::Peripherals,
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prelude::*,
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Delay,
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};
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use esp_backtrace as _;
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use esp_println::println;
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#[entry]
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fn main() -> ! {
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let peripherals = Peripherals::take();
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let mut system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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// Create ADC instances
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let analog = peripherals.APB_SARADC.split();
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let mut adc1_config = AdcConfig::new();
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let atten = Attenuation::Attenuation11dB;
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// You can try any of the following calibration methods by uncommenting them
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// type AdcCal = ();
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// type AdcCal = adc::AdcCalBasic<ADC1>;
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// type AdcCal = adc::AdcCalLine<ADC1>;
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type AdcCal = adc::AdcCalCurve<ADC1>;
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let mut pin = adc1_config.enable_pin_with_cal::<_, AdcCal>(io.pins.gpio2.into_analog(), atten);
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let mut adc1 = ADC::<ADC1>::adc(
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&mut system.peripheral_clock_control,
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analog.adc1,
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adc1_config,
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)
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.unwrap();
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let mut delay = Delay::new(&clocks);
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loop {
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let pin_value = nb::block!(adc1.read(&mut pin)).unwrap();
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let pin_value_mv = pin_value as u32 * atten.ref_mv() as u32 / 4096;
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println!("PIN2 ADC reading = {pin_value} ({pin_value_mv} mV)");
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delay.delay_ms(1500u32);
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}
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}
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