⚡️ Exit from ISR on AVR already does sei

Co-Authored-By: tombrazier <68918209+tombrazier@users.noreply.github.com>
MarlinFirmware · Apr 7, 2023 · 3ec5d6d · 3ec5d6d
1 parent 75aa880
commit 3ec5d6d
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/Marlin/src/module/stepper.cpp b/Marlin/src/module/stepper.cpp
@@ -1600,8 +1600,11 @@ void Stepper::isr() {
   // Set the next ISR to fire at the proper time
   HAL_timer_set_compare(MF_TIMER_STEP, hal_timer_t(next_isr_ticks));
 
-  // Don't forget to finally reenable interrupts
-  hal.isr_on();
+  // Don't forget to finally reenable interrupts on non-AVR.
+  // AVR automatically calls sei() for us on Return-from-Interrupt.
+  #ifndef __AVR__
+    hal.isr_on();
+  #endif
 }
 
 #if MINIMUM_STEPPER_PULSE || MAXIMUM_STEPPER_RATE