stm32/spi: fix blocking transfer hanging after async.

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/stm32/src/bin/spi_dma.rs b/tests/stm32/src/bin/spi_dma.rs
index 3e9521ae7..f4f1994c0 100644
--- a/tests/stm32/src/bin/spi_dma.rs
+++ b/tests/stm32/src/bin/spi_dma.rs
@@ -68,6 +68,22 @@ async fn main(_spawner: Spawner, p: Peripherals) {
     spi.read::<u8>(&mut []).await.unwrap();
     spi.write::<u8>(&[]).await.unwrap();
 
+    // === Check mixing blocking with async.
+    spi.blocking_transfer(&mut buf, &data).unwrap();
+    assert_eq!(buf, data);
+    spi.transfer(&mut buf, &data).await.unwrap();
+    assert_eq!(buf, data);
+    spi.blocking_write(&buf).unwrap();
+    spi.transfer(&mut buf, &data).await.unwrap();
+    assert_eq!(buf, data);
+    spi.blocking_read(&mut buf).unwrap();
+    spi.blocking_write(&buf).unwrap();
+    spi.write(&buf).await.unwrap();
+    spi.read(&mut buf).await.unwrap();
+    spi.blocking_write(&buf).unwrap();
+    spi.blocking_read(&mut buf).unwrap();
+    spi.write(&buf).await.unwrap();
+
     info!("Test OK");
     cortex_m::asm::bkpt();
 }