small cleanup in i2s_parallel examples

liebman · Oct 21, 2024 · 2bddce5 · 2bddce5
1 parent 7852126
commit 2bddce5
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Showing 2 changed files with 2 additions and 15 deletions.
diff --git a/examples/src/bin/embassy_i2s_parallel.rs b/examples/src/bin/embassy_i2s_parallel.rs
@@ -75,13 +75,6 @@ async fn main(_spawner: Spawner) {
         data[3] = (offset + 1) as u8;
     }
 
-    let tx_buffer = unsafe {
-        use esp_hal::dma::ReadBuffer;
-        let (ptr, len) = tx_buffer.read_buffer();
-        // SAFETY: tx_buffer is left inside of the TxBuf
-        core::slice::from_raw_parts_mut(ptr as *mut u8, len)
-    };
-
     let mut tx_buf = DmaTxBuf::new(tx_descriptors, tx_buffer).expect("DmaTxBuf::new failed");
 
     info!("Sending {} bytes!", BUFFER_SIZE);

diff --git a/examples/src/bin/i2s_parallel.rs b/examples/src/bin/i2s_parallel.rs
@@ -2,7 +2,8 @@
 //! rate with a delay of 10ms between each transfer.
 //!
 //! The following wiring is assumed:
-//! - Data pins => GPIO16, GPIO4, GPIO17, GPIO18, GPIO5, GPIO19, GPIO12, and GPIO14
+//! - Data pins => GPIO16, GPIO4, GPIO17, GPIO18, GPIO5, GPIO19, GPIO12, and
+//!   GPIO14
 //! - Clock output pin => GPIO25
 //!
 //! You can use a logic analyzer to see how the pins are used.
@@ -68,13 +69,6 @@ fn main() -> ! {
         data[3] = (offset + 1) as u8;
     }
 
-    let tx_buffer = unsafe {
-        use esp_hal::dma::ReadBuffer;
-        let (ptr, len) = tx_buffer.read_buffer();
-        // SAFETY: tx_buffer is left inside of the TxBuf
-        core::slice::from_raw_parts_mut(ptr as *mut u8, len)
-    };
-
     let mut tx_buf: DmaTxBuf =
         DmaTxBuf::new(tx_descriptors, tx_buffer).expect("DmaTxBuf::new failed");