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Add HAL_timer_start for AVR, use stepper timer to time pulses

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This commit is contained in:
Scott Lahteine
2018-06-03 01:43:00 -05:00
parent e970e429b6
commit 3701869e6c
4 changed files with 41 additions and 36 deletions
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23
Marlin/src/module/stepper.cpp
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@ -1993,27 +1993,8 @@ void Stepper::init() {
E_AXIS_INIT(4);
#endif
#ifdef __AVR__
// waveform generation = 0100 = CTC
SET_WGM(1, CTC_OCRnA);
// output mode = 00 (disconnected)
SET_COMA(1, NORMAL);
// Set the timer pre-scaler
// Generally we use a divider of 8, resulting in a 2MHz timer
// frequency on a 16MHz MCU. If you are going to change this, be
// sure to regenerate speed_lookuptable.h with
// create_speed_lookuptable.py
SET_CS(1, PRESCALER_8); // CS 2 = 1/8 prescaler
// Init Stepper ISR to 122 Hz for quick starting
OCR1A = 0x4000;
TCNT1 = 0;
#else
// Init Stepper ISR to 122 Hz for quick starting
HAL_timer_start(STEP_TIMER_NUM, 122);
#endif
// Init Stepper ISR to 122 Hz for quick starting
HAL_timer_start(STEP_TIMER_NUM, 122);
ENABLE_STEPPER_DRIVER_INTERRUPT();