From 2ed300c939a37b141ed8e078ece8ecec72f7c072 Mon Sep 17 00:00:00 2001
From: Diego Barrios Romero <eldruin@gmail.com>
Date: Fri, 17 Apr 2020 10:06:14 +0200
Subject: [PATCH] Add full duplex I2S trait

---
 src/i2s.rs     | 17 +++++++++++++++++
 src/lib.rs     |  1 +
 src/prelude.rs |  1 +
 3 files changed, 19 insertions(+)
 create mode 100644 src/i2s.rs

diff --git a/src/i2s.rs b/src/i2s.rs
new file mode 100644
index 000000000..215b84c9c
--- /dev/null
+++ b/src/i2s.rs
@@ -0,0 +1,17 @@
+//! I2S - Inter-IC Sound Interface
+
+use nb;
+
+/// Full duplex
+pub trait FullDuplex<Word> {
+    /// Error type
+    type Error;
+
+    /// Reads the left word and right word available.
+    ///
+    /// The order is in the result is `(left_word, right_word)`
+    fn try_read(&mut self) -> nb::Result<(Word, Word), Self::Error>;
+
+    /// Sends a left word and a right word to the slave.
+    fn try_send(&mut self, left_word: Word, right_word: Word) -> nb::Result<(), Self::Error>;
+}
diff --git a/src/lib.rs b/src/lib.rs
index dd2592660..554687eb6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -692,6 +692,7 @@ pub mod blocking;
 pub mod capture;
 pub mod digital;
 pub mod fmt;
+pub mod i2s;
 pub mod prelude;
 pub mod pwm;
 pub mod qei;
diff --git a/src/prelude.rs b/src/prelude.rs
index df59cf823..71e814389 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -27,6 +27,7 @@ pub use crate::digital::InputPin as _embedded_hal_digital_InputPin;
 pub use crate::digital::OutputPin as _embedded_hal_digital_OutputPin;
 pub use crate::digital::StatefulOutputPin as _embedded_hal_digital_StatefulOutputPin;
 pub use crate::digital::ToggleableOutputPin as _embedded_hal_digital_ToggleableOutputPin;
+pub use crate::i2s::FullDuplex as _embedded_hal_i2s_FullDuplex;
 pub use crate::pwm::Pwm as _embedded_hal_Pwm;
 pub use crate::pwm::PwmPin as _embedded_hal_PwmPin;
 pub use crate::qei::Qei as _embedded_hal_Qei;