rp/pio: disable state machines on drop

1 files changed, 3 insertions, 0 deletions

diff --git a/embassy-rp/src/pio.rs b/embassy-rp/src/pio.rs
index 32e9be74d..d05eef04b 100644
--- a/embassy-rp/src/pio.rs
+++ b/embassy-rp/src/pio.rs
@@ -324,6 +324,9 @@ pub struct PioStateMachineInstance<'d, PIO: PioInstance, const SM: usize> {
 
 impl<'d, PIO: PioInstance, const SM: usize> Drop for PioStateMachineInstance<'d, PIO, SM> {
     fn drop(&mut self) {
+        unsafe {
+            PIO::PIO.ctrl().write_clear(|w| w.set_sm_enable(1 << SM));
+        }
         on_pio_drop::<PIO>();
     }
 }