99bf346898
* Clean up passing clocks to drivers * Update changelog * Initialise Clocks in a critical section * Fix calling now() before init * Fix doc * Fix esp-wifi migration guide * Add safety comment * Update tests
56 lines
1.6 KiB
Rust
56 lines
1.6 KiB
Rust
//! Connect a potentiometer to an IO pin and see the read values change when
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//! rotating the shaft.
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//!
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//! Alternatively, you could also connect the IO pin to GND or 3V3 to see the
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//! maximum and minimum raw values read.
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//!
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//! The following wiring is assumed for ESP32:
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//! - Analog pin => GPIO32
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//! The following wiring is assumed for ESP32S2/S3:
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//! - Analog pin => GPIO3
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//! The following wiring is assumed for others:
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//! - Analog pin => GPIO2
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//% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3
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#![no_std]
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#![no_main]
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use esp_backtrace as _;
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use esp_hal::{
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analog::adc::{Adc, AdcConfig, Attenuation},
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delay::Delay,
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gpio::Io,
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prelude::*,
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};
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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 = esp_hal::init(esp_hal::Config::default());
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let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
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cfg_if::cfg_if! {
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if #[cfg(feature = "esp32")] {
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let analog_pin = io.pins.gpio32;
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} else if #[cfg(any(feature = "esp32s2", feature = "esp32s3"))] {
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let analog_pin = io.pins.gpio3;
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} else {
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let analog_pin = io.pins.gpio2;
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}
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}
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// Create ADC instances
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let mut adc1_config = AdcConfig::new();
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let mut adc1_pin = adc1_config.enable_pin(analog_pin, Attenuation::Attenuation11dB);
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let mut adc1 = Adc::new(peripherals.ADC1, adc1_config);
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let delay = Delay::new();
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loop {
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let pin_value: u16 = nb::block!(adc1.read_oneshot(&mut adc1_pin)).unwrap();
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println!("ADC reading = {}", pin_value);
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delay.delay_millis(1500);
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}
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}
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