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Fix stepper pulse timing

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Always honor minimum period on stepper pulse generation, and fix timing calculations

Signed-off-by: etagle <ejtagle@hotmail.com>
This commit is contained in:
etagle
2018-06-12 01:04:26 -03:00
committed by Scott Lahteine
parent 0d79128c8d
commit a215725df6
8 changed files with 116 additions and 107 deletions
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17
Marlin/src/HAL/HAL_LPC1768/HAL_timers.h
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@ -66,22 +66,23 @@
typedef uint32_t hal_timer_t;
#define HAL_TIMER_TYPE_MAX 0xFFFFFFFF
#define HAL_TIMER_RATE ((SystemCoreClock) / 4) // frequency of timers peripherals
#define STEP_TIMER_NUM 0 // Timer Index for Stepper
#define TEMP_TIMER_NUM 1 // Timer Index for Temperature
#define PULSE_TIMER_NUM STEP_TIMER_NUM
#define PWM_TIMER_NUM 3 // Timer Index for PWM
#define HAL_TIMER_RATE ((SystemCoreClock) / 4) // frequency of timers peripherals
#define STEPPER_TIMER_RATE HAL_TIMER_RATE // frequency of stepper timer (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
#define HAL_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
#define STEPPER_TIMER_PRESCALE (CYCLES_PER_MICROSECOND / HAL_TICKS_PER_US)
#define STEP_TIMER_MIN_INTERVAL 8 // minimum time in µs between stepper interrupts
#define TEMP_TIMER_RATE 1000000
#define TEMP_TIMER_FREQUENCY 1000 // temperature interrupt frequency
#define PULSE_TIMER_PRESCALE STEPPER_TIMER_PRESCALE
#define STEPPER_TIMER_RATE HAL_TIMER_RATE // frequency of stepper timer (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
#define STEPPER_TIMER_PRESCALE (CYCLES_PER_MICROSECOND / STEPPER_TIMER_TICKS_PER_US)
#define PULSE_TIMER_RATE STEPPER_TIMER_RATE // frequency of pulse timer
#define PULSE_TIMER_PRESCALE STEPPER_TIMER_PRESCALE
#define PULSE_TIMER_TICKS_PER_US STEPPER_TIMER_TICKS_PER_US
#define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
#define DISABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_disable_interrupt(STEP_TIMER_NUM)