added dac

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Added
 - 10-bit addressing mode for I2C traits.
+- Added `blocking::dac::SingleChannelDac` trait for digitial-to-analog-converters.
 - `try_set_state` method for `OutputPin` using an input `PinState` value.
 
 ### Changed

src/blocking/dac.rs

@@ -0,0 +1,10 @@
+//! Digital-to-analog conversion traits
+
+/// Trait representing a single-channel digital-to-analog converter (DAC).
+pub trait SingleChannelDac<Word> {
+    /// Error type returned by DAC methods
+    type Error;
+
+    /// Output a constant signal, given a bit word.
+    fn try_set_value(&mut self, value: Word) -> Result<(), Self::Error>;
+}

src/blocking/mod.rs

@@ -4,6 +4,7 @@
 //! traits. To save boilerplate when that's the case a `Default` marker trait may be provided.
 //! Implementing that marker trait will opt in your type into a blanket implementation.
 
+pub mod dac;
 pub mod delay;
 pub mod i2c;
 pub mod rng;

src/prelude.rs

@@ -5,6 +5,7 @@
 
 pub use crate::adc::Channel as _embedded_hal_adc_Channel;
 pub use crate::adc::OneShot as _embedded_hal_adc_OneShot;
+pub use crate::blocking::dac::SingleChannelDac as _embedded_hal_blocking_dac_SingleChannelDac;
 pub use crate::blocking::delay::DelayMs as _embedded_hal_blocking_delay_DelayMs;
 pub use crate::blocking::delay::DelayUs as _embedded_hal_blocking_delay_DelayUs;
 pub use crate::blocking::i2c::{