Proper AVR preemptive interrupt handling (#10501)

Co-Authored-By: ejtagle <ejtagle@hotmail.com>
2018-04-23 20:47:31 -05:00
parent 0764981aa1
commit 51004e003d
5 changed files with 47 additions and 38 deletions
--- a/Marlin/stepper.h
+++ b/Marlin/stepper.h
@@ -54,6 +54,7 @@ extern Stepper stepper;

 #define ENABLE_STEPPER_DRIVER_INTERRUPT()  SBI(TIMSK1, OCIE1A)
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() CBI(TIMSK1, OCIE1A)
+#define STEPPER_ISR_ENABLED()             TEST(TIMSK1, OCIE1A)

 // intRes = intIn1 * intIn2 >> 16
 // uses: