Merge pull request #7799 from Bob-the-Kuhn/Marlin-2.0.x-fix-LPC1768-stepper-hang-and-limit-maximum-stepper-ISR-spacing
Marlin 2.0.x - fix LPC1768 stepper hang and limit maximum stepper ISR spacing
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f0d34ca4f5
@ -79,8 +79,16 @@ void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
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static FORCE_INLINE void HAL_timer_set_count(const uint8_t timer_num, const HAL_TIMER_TYPE count) {
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switch (timer_num) {
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case 0: LPC_TIM0->MR0 = count; break;
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case 1: LPC_TIM1->MR0 = count; break;
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case 0:
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LPC_TIM0->MR0 = count;
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if (LPC_TIM0->TC > count)
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LPC_TIM0->TC = count - 5; // generate an immediate stepper ISR
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break;
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case 1:
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LPC_TIM1->MR0 = count;
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if (LPC_TIM1->TC > count)
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LPC_TIM1->TC = count - 5; // make sure we don't have one extra long period
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break;
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}
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}
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@ -323,8 +323,13 @@ void Stepper::isr() {
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HAL_TIMER_TYPE ocr_val;
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#define ENDSTOP_NOMINAL_OCR_VAL 3000 // check endstops every 1.5ms to guarantee two stepper ISRs within 5ms for BLTouch
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#define OCR_VAL_TOLERANCE 1000 // First max delay is 2.0ms, last min delay is 0.5ms, all others 1.5ms
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#if defined(CPU_32_BIT)
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#define ENDSTOP_NOMINAL_OCR_VAL 1500 * HAL_TICKS_PER_US // check endstops every 1.5ms to guarantee two stepper ISRs within 5ms for BLTouch
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#define OCR_VAL_TOLERANCE 500 * HAL_TICKS_PER_US // First max delay is 2.0ms, last min delay is 0.5ms, all others 1.5ms
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#else
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#define ENDSTOP_NOMINAL_OCR_VAL 3000 // check endstops every 1.5ms to guarantee two stepper ISRs within 5ms for BLTouch
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#define OCR_VAL_TOLERANCE 1000 // First max delay is 2.0ms, last min delay is 0.5ms, all others 1.5ms
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#endif
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#if DISABLED(ADVANCE) && DISABLED(LIN_ADVANCE)
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// Disable Timer0 ISRs and enable global ISR again to capture UART events (incoming chars)
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@ -335,40 +340,45 @@ void Stepper::isr() {
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#endif
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#endif
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#define _SPLIT(L) (ocr_val = (HAL_TIMER_TYPE)L)
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#if ENABLED(ENDSTOP_INTERRUPTS_FEATURE) || defined(CPU_32_BIT)
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#define SPLIT(L) _SPLIT(L)
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#else // sample endstops in between step pulses
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static uint32_t step_remaining = 0;
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#define SPLIT(L) do { \
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_SPLIT(L); \
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if (ENDSTOPS_ENABLED && L > ENDSTOP_NOMINAL_OCR_VAL) { \
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const uint16_t remainder = (uint16_t)L % (ENDSTOP_NOMINAL_OCR_VAL); \
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ocr_val = (remainder < OCR_VAL_TOLERANCE) ? ENDSTOP_NOMINAL_OCR_VAL + remainder : ENDSTOP_NOMINAL_OCR_VAL; \
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step_remaining = (uint16_t)L - ocr_val; \
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} \
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}while(0)
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static uint32_t step_remaining = 0; // SPLIT function always runs. This allows 16 bit timers to be
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// used to generate the stepper ISR.
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#define SPLIT(L) do { \
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if (L > ENDSTOP_NOMINAL_OCR_VAL) { \
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const uint32_t remainder = (uint32_t)L % (ENDSTOP_NOMINAL_OCR_VAL); \
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ocr_val = (remainder < OCR_VAL_TOLERANCE) ? ENDSTOP_NOMINAL_OCR_VAL + remainder : ENDSTOP_NOMINAL_OCR_VAL; \
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step_remaining = (uint32_t)L - ocr_val; \
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} \
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else \
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ocr_val = L;\
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}while(0)
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if (step_remaining && ENDSTOPS_ENABLED) { // Just check endstops - not yet time for a step
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if (step_remaining) {
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if (ENDSTOPS_ENABLED)
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endstops.update();
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if (step_remaining > ENDSTOP_NOMINAL_OCR_VAL) {
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step_remaining -= ENDSTOP_NOMINAL_OCR_VAL;
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ocr_val = ENDSTOP_NOMINAL_OCR_VAL;
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}
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else {
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ocr_val = step_remaining;
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step_remaining = 0; // last one before the ISR that does the step
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}
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_NEXT_ISR(ocr_val);
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NOLESS(OCR1A, TCNT1 + 16);
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HAL_ENABLE_ISRs(); // re-enable ISRs
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return;
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if (step_remaining > ENDSTOP_NOMINAL_OCR_VAL) {
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step_remaining -= ENDSTOP_NOMINAL_OCR_VAL;
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ocr_val = ENDSTOP_NOMINAL_OCR_VAL;
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}
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else {
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ocr_val = step_remaining;
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step_remaining = 0; // last one before the ISR that does the step
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}
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_NEXT_ISR(ocr_val);
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#if DISABLED(ADVANCE) && DISABLED(LIN_ADVANCE)
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#ifdef CPU_32_BIT
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HAL_timer_set_count(STEP_TIMER_NUM, ocr_val);
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#else
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NOLESS(OCR1A, TCNT1 + 16);
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#endif
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HAL_ENABLE_ISRs(); // re-enable ISRs
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#endif
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return;
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}
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if (cleaning_buffer_counter) {
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--cleaning_buffer_counter;
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current_block = NULL;
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@ -748,7 +758,6 @@ void Stepper::isr() {
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SPLIT(timer); // split step into multiple ISRs if larger than ENDSTOP_NOMINAL_OCR_VAL
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_NEXT_ISR(ocr_val);
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deceleration_time += timer;
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#if ENABLED(LIN_ADVANCE)
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@ -832,7 +841,6 @@ void Stepper::isr() {
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// Timer interrupt for E. e_steps is set in the main routine;
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void Stepper::advance_isr() {
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nextAdvanceISR = eISR_Rate;
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#if ENABLED(MK2_MULTIPLEXER)
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