Add blocking I2S traits

Author: eldruin

src/blocking/i2s.rs

@@ -0,0 +1,39 @@
+//! Blocking I2S API
+
+/// Blocking read
+pub trait Read<W> {
+    /// Error type
+    type Error;
+
+    /// Reads enough bytes from the slave to fill `left_words` and `right_words`.
+    fn try_read<'w>(
+        &mut self,
+        left_words: &'w mut [W],
+        right_words: &'w mut [W],
+    ) -> Result<(), Self::Error>;
+}
+
+/// Blocking write
+pub trait Write<W> {
+    /// Error type
+    type Error;
+
+    /// Sends `left_words` and `right_words` to the slave.
+    fn try_write<'w>(
+        &mut self,
+        left_words: &'w [W],
+        right_words: &'w [W],
+    ) -> Result<(), Self::Error>;
+}
+
+/// Blocking write (iterator version)
+pub trait WriteIter<W> {
+    /// Error type
+    type Error;
+
+    /// Sends `left_words` and `right_words` to the slave.
+    fn try_write<LW, RW>(&mut self, left_words: LW, right_words: RW) -> Result<(), Self::Error>
+    where
+        LW: IntoIterator<Item = W>,
+        RW: IntoIterator<Item = W>;
+}

src/blocking/mod.rs

@@ -6,6 +6,7 @@
 
 pub mod delay;
 pub mod i2c;
+pub mod i2s;
 pub mod rng;
 pub mod serial;
 pub mod spi;

src/prelude.rs

@@ -13,6 +13,9 @@ pub use crate::blocking::i2c::{
     WriteIterRead as _embedded_hal_blocking_i2c_WriteIterRead,
     WriteRead as _embedded_hal_blocking_i2c_WriteRead,
 };
+pub use crate::blocking::i2s::{
+    Read as _embedded_hal_blocking_i2s_Read, Write as _embedded_hal_blocking_i2s_Write,
+};
 pub use crate::blocking::rng::Read as _embedded_hal_blocking_rng_Read;
 pub use crate::blocking::serial::Write as _embedded_hal_blocking_serial_Write;
 pub use crate::blocking::spi::{