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Fix for Linear Advance Bug April 2nd 2023 #20

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Fix for Linear Advance Bug April 2nd 2023 #20

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5 changes: 3 additions & 2 deletions Marlin/src/module/stepper.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1503,7 +1503,7 @@ void Stepper::isr() {
advance_isr();
nextAdvanceISR = la_interval;
}
else if (nextAdvanceISR == LA_ADV_NEVER) // Start LA steps if necessary
else if (nextAdvanceISR > la_interval) // Start/accelerate LA steps if necessary
nextAdvanceISR = la_interval;
#endif

Expand Down Expand Up @@ -2095,7 +2095,8 @@ hal_timer_t Stepper::calc_timer_interval(uint32_t step_rate) {
#ifdef CPU_32_BIT

// A fast processor can just do integer division
return step_rate ? uint32_t(STEPPER_TIMER_RATE) / step_rate : HAL_TIMER_TYPE_MAX;
constexpr uint32_t min_step_rate = uint32_t(STEPPER_TIMER_RATE) / HAL_TIMER_TYPE_MAX;
return step_rate > min_step_rate ? uint32_t(STEPPER_TIMER_RATE) / step_rate : HAL_TIMER_TYPE_MAX;

#else

Expand Down