ff80b69183
* Provide ADC values in mV instead of requiring the user to scale them * Changelog * Try converting poly calibration also * Update changelog and comments * Fix example
56 lines
1.6 KiB
Rust
56 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 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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// Note that only AdcCalLine and AdcCalCurve return readings in mV; the other
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// two return raw readings in some unspecified scale.
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//
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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(analog.adc1, adc1_config).unwrap();
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let mut delay = Delay::new(&clocks);
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loop {
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let pin_mv = nb::block!(adc1.read(&mut pin)).unwrap();
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println!("PIN2 ADC reading = {pin_mv} mV");
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delay.delay_ms(1500u32);
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}
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}
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