Trait arduino_hal::prelude::_embedded_hal_adc_OneShot

source · 
pub trait _embedded_hal_adc_OneShot<ADC, Word, Pin>
where
    Pin: Channel<ADC>,
{
    type Error;

    // Required method
    fn read(&mut self, pin: &mut Pin) -> Result<Word, Error<Self::Error>>;
}
Expand description

ADCs that sample on single channels per request, and do so at the time of the request.

This trait is the interface to an ADC that is configured to read a specific channel at the time of the request (in contrast to continuous asynchronous sampling).

use embedded_hal::adc::{Channel, OneShot};

struct MyAdc; // 10-bit ADC, with 5 channels

impl<WORD, PIN> OneShot<MyAdc, WORD, PIN> for MyAdc
where
   WORD: From<u16>,
   PIN: Channel<MyAdc, ID=u8>,
{
   type Error = ();

   fn read(&mut self, _pin: &mut PIN) -> nb::Result<WORD, Self::Error> {
       let chan = 1 << PIN::channel();
       self.power_up();
       let result = self.do_conversion(chan);
       self.power_down();
       Ok(result.into())
   }
}

Required Associated Types§

source

type Error

Error type returned by ADC methods

Required Methods§

source

fn read(&mut self, pin: &mut Pin) -> Result<Word, Error<Self::Error>>

Request that the ADC begin a conversion on the specified pin

This method takes a Pin reference, as it is expected that the ADC will be able to sample whatever channel underlies the pin.

Implementors§