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//! Features only supported by ADS1x14 and ADS1x15 devices.
use crate::{
conversion, ic, Ads1x1x, BitFlags as BF, ComparatorLatching, ComparatorMode,
ComparatorPolarity, ComparatorQueue, Error, FullScaleRange, Register,
};
impl<I2C, IC, CONV, MODE, E> Ads1x1x<I2C, IC, CONV, MODE>
where
I2C: embedded_hal_async::i2c::I2c<Error = E>,
IC: ic::Tier2Features,
CONV: conversion::ConvertThreshold<E>,
{
/// Sets the input voltage measurable range.
///
/// This configures the programmable gain amplifier (PGA) and determines the measurable input voltage range.
pub async fn set_full_scale_range(&mut self, range: FullScaleRange) -> Result<(), Error<E>> {
use crate::FullScaleRange as FSR;
let cfg = self.config.clone();
let config = match range {
FSR::Within6_144V => cfg.with_low(BF::PGA2).with_low(BF::PGA1).with_low(BF::PGA0),
FSR::Within4_096V => cfg
.with_low(BF::PGA2)
.with_low(BF::PGA1)
.with_high(BF::PGA0),
FSR::Within2_048V => cfg
.with_low(BF::PGA2)
.with_high(BF::PGA1)
.with_low(BF::PGA0),
FSR::Within1_024V => cfg
.with_low(BF::PGA2)
.with_high(BF::PGA1)
.with_high(BF::PGA0),
FSR::Within0_512V => cfg
.with_high(BF::PGA2)
.with_low(BF::PGA1)
.with_low(BF::PGA0),
FSR::Within0_256V => cfg
.with_high(BF::PGA2)
.with_low(BF::PGA1)
.with_high(BF::PGA0),
};
self.write_register(Register::CONFIG, config.bits).await?;
self.config = config;
Ok(())
}
/// Sets the raw comparator lower threshold.
///
/// The voltage that these values correspond to must be calculated using the
/// full-scale range ([`FullScaleRange`]) selected.
///
/// The input value must be within `[2047..-2048]` for 12-bit devices (`ADS101x`)
/// and within `[32767..-32768]` for 16-bit devices (`ADS111x`).
pub async fn set_low_threshold_raw(&mut self, value: i16) -> Result<(), Error<E>> {
let register_value = CONV::convert_threshold(value)?;
self.write_register(Register::LOW_TH, register_value).await
}
/// Sets the raw comparator upper threshold.
///
/// The voltage that these values correspond to must be calculated using the
/// full-scale range ([`FullScaleRange`]) selected.
///
/// The input value must be within `[2047..-2048]` for 12-bit devices (`ADS101x`)
/// and within `[32767..-32768]` for 16-bit devices (`ADS111x`).
pub async fn set_high_threshold_raw(&mut self, value: i16) -> Result<(), Error<E>> {
let register_value = CONV::convert_threshold(value)?;
self.write_register(Register::HIGH_TH, register_value).await
}
/// Sets the comparator mode.
pub async fn set_comparator_mode(&mut self, mode: ComparatorMode) -> Result<(), Error<E>> {
let config = match mode {
ComparatorMode::Traditional => self.config.with_low(BF::COMP_MODE),
ComparatorMode::Window => self.config.with_high(BF::COMP_MODE),
};
self.write_register(Register::CONFIG, config.bits).await?;
self.config = config;
Ok(())
}
/// Sets the comparator polarity.
pub async fn set_comparator_polarity(
&mut self,
polarity: ComparatorPolarity,
) -> Result<(), Error<E>> {
let config = match polarity {
ComparatorPolarity::ActiveLow => self.config.with_low(BF::COMP_POL),
ComparatorPolarity::ActiveHigh => self.config.with_high(BF::COMP_POL),
};
self.write_register(Register::CONFIG, config.bits).await?;
self.config = config;
Ok(())
}
/// Sets the comparator latching.
pub async fn set_comparator_latching(
&mut self,
latching: ComparatorLatching,
) -> Result<(), Error<E>> {
let config = match latching {
ComparatorLatching::Nonlatching => self.config.with_low(BF::COMP_LAT),
ComparatorLatching::Latching => self.config.with_high(BF::COMP_LAT),
};
self.write_register(Register::CONFIG, config.bits).await?;
self.config = config;
Ok(())
}
/// Activates the comparator and sets the alert queue.
///
/// The comparator can be disabled with [`disable_comparator`](Self::disable_comparator).
pub async fn set_comparator_queue(&mut self, queue: ComparatorQueue) -> Result<(), Error<E>> {
let config = match queue {
ComparatorQueue::One => self.config.with_low(BF::COMP_QUE1).with_low(BF::COMP_QUE0),
ComparatorQueue::Two => self.config.with_low(BF::COMP_QUE1).with_high(BF::COMP_QUE0),
ComparatorQueue::Four => self.config.with_high(BF::COMP_QUE1).with_low(BF::COMP_QUE0),
};
self.write_register(Register::CONFIG, config.bits).await?;
self.config = config;
Ok(())
}
/// Disables the comparator. (default)
///
/// This sets the ALERT/RDY pin to high-impedance.
///
/// The comparator can be enabled by setting the comparator queue using
/// the [`set_comparator_queue`](Self::set_comparator_queue) method.
pub async fn disable_comparator(&mut self) -> Result<(), Error<E>> {
let config = self
.config
.with_high(BF::COMP_QUE1)
.with_high(BF::COMP_QUE0);
self.write_register(Register::CONFIG, config.bits).await?;
self.config = config;
Ok(())
}
/// Enables the ALERT/RDY pin as conversion-ready function.
///
/// When in one-shot mode, this makes the ALERT/RDY pin output the OS bit,
/// in continuous-conversion mode, provides a continuous-conversion ready pulse.
///
/// When calling this the comparator will be reset to default and any thresholds will be cleared.
pub async fn use_alert_rdy_pin_as_ready(&mut self) -> Result<(), Error<E>> {
if self.config
!= self
.config
.with_high(BF::COMP_QUE1)
.with_high(BF::COMP_QUE0)
{
self.set_comparator_queue(ComparatorQueue::default())
.await?;
}
self.write_register(Register::HIGH_TH, 0x8000).await?;
self.write_register(Register::LOW_TH, 0).await
}
}
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