Fix extraneous Linear Advance DIR change (MarlinFirmware#20131)

avandekamp · Feb 4, 2021 · e061a04 · e061a04
1 parent 7c21e59
commit e061a04
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/Marlin/src/module/stepper.cpp b/Marlin/src/module/stepper.cpp
@@ -2261,7 +2261,6 @@ uint32_t Stepper::block_phase_isr() {
         interval = LA_isr_rate;
       }
       else if (step_events_completed < decelerate_after && LA_current_adv_steps < LA_max_adv_steps) {
-             //step_events_completed <= (uint32_t)accelerate_until) {
         LA_steps++;
         LA_current_adv_steps++;
         interval = LA_isr_rate;
@@ -2272,6 +2271,8 @@ uint32_t Stepper::block_phase_isr() {
     else
       interval = LA_ADV_NEVER;
 
+    if (!LA_steps) return interval; // Leave pins alone if there are no steps!
+
     DIR_WAIT_BEFORE();
 
     #if ENABLED(MIXING_EXTRUDER)