Add SpiDmaBus::split for moving between manual & automatic DMA buff…

…ers (#2824) * Allow swapping dma buffers * Deconstruct makes more sense * Format * Changelog * Race-conditioned * Change SpiDmaBus::deconstruct name to SpiDmaBus::split * Add flush & bracket references * Fix mutability --------- Co-authored-by: ferris <[email protected]>
esp-rs · Dec 20, 2024 · 0ef5a80 · 0ef5a80
1 parent f83ab23
commit 0ef5a80
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 0 deletions.
diff --git a/esp-hal/CHANGELOG.md b/esp-hal/CHANGELOG.md
@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Peripheral singletons now implement `Debug` and `defmt::Format` (#2682, #2834)
 - `BurstConfig`, a device-specific configuration for configuring DMA transfers in burst mode (#2543)
 - `{DmaRxBuf, DmaTxBuf, DmaRxTxBuf}::set_burst_config` (#2543)
+- Added `SpiDmaBus::split` for moving between manual & automatic DMA buffers (#2824)
 - ESP32-S2: DMA support for AES (#2699)
 - Added `transfer_in_place_async` and embedded-hal-async implementation to `Spi` (#2691)
 - `InterruptHandler` now implements `Hash` and `defmt::Format` (#2830)

diff --git a/esp-hal/src/spi/master.rs b/esp-hal/src/spi/master.rs
@@ -1646,6 +1646,12 @@ mod dma {
                 tx_buf,
             }
         }
+
+        /// Splits [SpiDmaBus] back into [SpiDma], [DmaRxBuf] and [DmaTxBuf].
+        pub fn split(mut self) -> (SpiDma<'d, M, T>, DmaRxBuf, DmaTxBuf) {
+            self.wait_for_idle();
+            (self.spi_dma, self.rx_buf, self.tx_buf)
+        }
     }
 
     impl<T> InterruptConfigurable for SpiDmaBus<'_, Blocking, T>