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|
//! ADC input channels.
use crate::{ic, Ads1x1x, BitFlags as BF, Config};
use private::ChannelSelection;
/// Marker type for an ADC input channel.
pub trait ChannelId<T> {
/// Get the channel.
fn channel_id() -> ChannelSelection;
}
macro_rules! impl_channels {
($(#[doc = $doc:expr] $CH:ident => [$($IC:ident),+]),+ $(,)?) => {
mod private {
#[derive(Debug, Clone, Copy)]
/// ADC input channel selection.
pub enum ChannelSelection {
$(
#[doc = $doc]
$CH,
)+
}
}
$(
#[doc = $doc]
pub struct $CH;
$(
impl<I2C, CONV, MODE> ChannelId<Ads1x1x<I2C, ic::$IC, CONV, MODE>> for $CH {
fn channel_id() -> ChannelSelection {
ChannelSelection::$CH
}
}
)+
)+
};
}
impl_channels!(
/// Measure signal on input channel 0 differentially to signal on input channel 1.
DifferentialA0A1 => [Ads1013, Ads1014, Ads1015, Ads1113, Ads1114, Ads1115],
/// Measure signal on input channel 0 differentially to signal on input channel 3.
DifferentialA0A3 => [Ads1015, Ads1115],
/// Measure signal on input channel 1 differentially to signal on input channel 3.
DifferentialA1A3 => [Ads1015, Ads1115],
/// Measure signal on input channel 3 differentially to signal on input channel 3.
DifferentialA2A3 => [Ads1015, Ads1115],
/// Measure single-ended signal on input channel 0.
SingleA0 => [Ads1015, Ads1115],
/// Measure single-ended signal on input channel 1.
SingleA1 => [Ads1015, Ads1115],
/// Measure single-ended signal on input channel 2.
SingleA2 => [Ads1015, Ads1115],
/// Measure single-ended signal on input channel 3.
SingleA3 => [Ads1015, Ads1115]
);
impl Config {
pub(crate) fn with_mux_bits(&self, ch: ChannelSelection) -> Self {
match ch {
ChannelSelection::DifferentialA0A1 => self
.with_low(BF::MUX2)
.with_low(BF::MUX1)
.with_low(BF::MUX0),
ChannelSelection::DifferentialA0A3 => self
.with_low(BF::MUX2)
.with_low(BF::MUX1)
.with_high(BF::MUX0),
ChannelSelection::DifferentialA1A3 => self
.with_low(BF::MUX2)
.with_high(BF::MUX1)
.with_low(BF::MUX0),
ChannelSelection::DifferentialA2A3 => self
.with_low(BF::MUX2)
.with_high(BF::MUX1)
.with_high(BF::MUX0),
ChannelSelection::SingleA0 => self
.with_high(BF::MUX2)
.with_low(BF::MUX1)
.with_low(BF::MUX0),
ChannelSelection::SingleA1 => self
.with_high(BF::MUX2)
.with_low(BF::MUX1)
.with_high(BF::MUX0),
ChannelSelection::SingleA2 => self
.with_high(BF::MUX2)
.with_high(BF::MUX1)
.with_low(BF::MUX0),
ChannelSelection::SingleA3 => self
.with_high(BF::MUX2)
.with_high(BF::MUX1)
.with_high(BF::MUX0),
}
}
}
|
