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Add HAL_timer_start to HAL.h

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Co-Authored-By: ejtagle <ejtagle@hotmail.com>
This commit is contained in:
Scott Lahteine 2018-06-09 21:28:37 -05:00
parent 1b1e15623a
commit 63af814d4d
3 changed files with 34 additions and 20 deletions
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34
Marlin/HAL.h
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@ -100,7 +100,8 @@ inline uint8_t HAL_get_reset_source(void) { return MCUSR; }
#define STEPPER_TIMER_PRESCALE 8
#define STEP_TIMER_MIN_INTERVAL 8 // minimum time in µs between stepper interrupts
#define TEMP_TIMER_FREQUENCY ((F_CPU) / 64.0 / 256.0)
#define TEMP_TIMER_PRESCALE 64
#define TEMP_TIMER_FREQUENCY ((F_CPU) / float(TEMP_TIMER_PRESCALE) / 256.0)
#define TIMER_OCR_1 OCR1A
#define TIMER_COUNTER_1 TCNT1
@ -118,7 +119,36 @@ inline uint8_t HAL_get_reset_source(void) { return MCUSR; }
#define DISABLE_TEMPERATURE_INTERRUPT() CBI(TIMSK0, OCIE0B)
#define TEMPERATURE_ISR_ENABLED() TEST(TIMSK0, OCIE0B)
#define HAL_timer_start(timer_num, frequency)
FORCE_INLINE void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
UNUSED(frequency);
switch (timer_num) {
case STEP_TIMER_NUM:
// 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
// (F_CPU) / (STEPPER_TIMER_PRESCALE) / frequency
OCR1A = 0x4000;
TCNT1 = 0;
break;
case TEMP_TIMER_NUM:
// Use timer0 for temperature measurement
// Interleave temperature interrupt with millies interrupt
OCR0B = 128;
break;
}
}
#define _CAT(a, ...) a ## __VA_ARGS__
#define HAL_timer_set_compare(timer, compare) (_CAT(TIMER_OCR_, timer) = compare)

16
Marlin/stepper.cpp
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@ -1947,22 +1947,8 @@ void Stepper::init() {
E_AXIS_INIT(4);
#endif
// 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;
HAL_timer_start(STEP_TIMER_NUM, 122); // OCR1A = 0x4000
ENABLE_STEPPER_DRIVER_INTERRUPT();

4
Marlin/temperature.cpp
View File

@ -1209,9 +1209,7 @@ void Temperature::init() {
HAL_ANALOG_SELECT(FILWIDTH_PIN);
#endif
// Use timer0 for temperature measurement
// Interleave temperature interrupt with millies interrupt
OCR0B = 128;
HAL_timer_start(TEMP_TIMER_NUM, TEMP_TIMER_FREQUENCY);
ENABLE_TEMPERATURE_INTERRUPT();
#if HAS_AUTO_FAN_0