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-
-
-
- #include "Configuration.h"
-
- #ifdef NUM_SERVOS
-
- #include <avr/interrupt.h>
- #include <Arduino.h>
-
- #include "servo.h"
-
- #define usToTicks(_us) (( clockCyclesPerMicrosecond()* _us) / 8)
- #define ticksToUs(_ticks) (( (unsigned)_ticks * 8)/ clockCyclesPerMicrosecond() )
-
- #define TRIM_DURATION 2
-
-
-
- static servo_t servos[MAX_SERVOS];
- static volatile int8_t Channel[_Nbr_16timers ];
-
- uint8_t ServoCount = 0;
-
-
-
- #define SERVO_INDEX_TO_TIMER(_servo_nbr) ((timer16_Sequence_t)(_servo_nbr / SERVOS_PER_TIMER))
- #define SERVO_INDEX_TO_CHANNEL(_servo_nbr) (_servo_nbr % SERVOS_PER_TIMER)
- #define SERVO_INDEX(_timer,_channel) ((_timer*SERVOS_PER_TIMER) + _channel)
- #define SERVO(_timer,_channel) (servos[SERVO_INDEX(_timer,_channel)])
-
- #define SERVO_MIN() (MIN_PULSE_WIDTH - this->min * 4)
- #define SERVO_MAX() (MAX_PULSE_WIDTH - this->max * 4)
-
-
-
- static inline void handle_interrupts(timer16_Sequence_t timer, volatile uint16_t *TCNTn, volatile uint16_t* OCRnA) {
- if (Channel[timer] < 0)
- *TCNTn = 0;
- else {
- if (SERVO_INDEX(timer,Channel[timer]) < ServoCount && SERVO(timer,Channel[timer]).Pin.isActive)
- digitalWrite( SERVO(timer,Channel[timer]).Pin.nbr,LOW);
- }
-
- Channel[timer]++;
- if (SERVO_INDEX(timer,Channel[timer]) < ServoCount && Channel[timer] < SERVOS_PER_TIMER) {
- *OCRnA = *TCNTn + SERVO(timer,Channel[timer]).ticks;
- if (SERVO(timer,Channel[timer]).Pin.isActive)
- digitalWrite( SERVO(timer,Channel[timer]).Pin.nbr,HIGH);
- }
- else {
-
- if ( ((unsigned)*TCNTn) + 4 < usToTicks(REFRESH_INTERVAL) )
- *OCRnA = (unsigned int)usToTicks(REFRESH_INTERVAL);
- else
- *OCRnA = *TCNTn + 4;
- Channel[timer] = -1;
- }
- }
-
- #ifndef WIRING
-
-
- #if defined(_useTimer1)
- SIGNAL (TIMER1_COMPA_vect) { handle_interrupts(_timer1, &TCNT1, &OCR1A); }
- #endif
-
- #if defined(_useTimer3)
- SIGNAL (TIMER3_COMPA_vect) { handle_interrupts(_timer3, &TCNT3, &OCR3A); }
- #endif
-
- #if defined(_useTimer4)
- SIGNAL (TIMER4_COMPA_vect) { handle_interrupts(_timer4, &TCNT4, &OCR4A); }
- #endif
-
- #if defined(_useTimer5)
- SIGNAL (TIMER5_COMPA_vect) { handle_interrupts(_timer5, &TCNT5, &OCR5A); }
- #endif
-
- #else
-
-
- #if defined(_useTimer1)
- void Timer1Service() { handle_interrupts(_timer1, &TCNT1, &OCR1A); }
- #endif
- #if defined(_useTimer3)
- void Timer3Service() { handle_interrupts(_timer3, &TCNT3, &OCR3A); }
- #endif
-
- #endif
-
-
- static void initISR(timer16_Sequence_t timer) {
- #if defined(_useTimer1)
- if (timer == _timer1) {
- TCCR1A = 0;
- TCCR1B = _BV(CS11);
- TCNT1 = 0;
- #if defined(__AVR_ATmega8__)|| defined(__AVR_ATmega128__)
- TIFR |= _BV(OCF1A);
- TIMSK |= _BV(OCIE1A);
- #else
-
- TIFR1 |= _BV(OCF1A);
- TIMSK1 |= _BV(OCIE1A);
- #endif
- #if defined(WIRING)
- timerAttach(TIMER1OUTCOMPAREA_INT, Timer1Service);
- #endif
- }
- #endif
-
- #if defined(_useTimer3)
- if (timer == _timer3) {
- TCCR3A = 0;
- TCCR3B = _BV(CS31);
- TCNT3 = 0;
- #if defined(__AVR_ATmega128__)
- TIFR |= _BV(OCF3A);
- ETIMSK |= _BV(OCIE3A);
- #else
- TIFR3 = _BV(OCF3A);
- TIMSK3 = _BV(OCIE3A) ;
- #endif
- #if defined(WIRING)
- timerAttach(TIMER3OUTCOMPAREA_INT, Timer3Service);
- #endif
- }
- #endif
-
- #if defined(_useTimer4)
- if (timer == _timer4) {
- TCCR4A = 0;
- TCCR4B = _BV(CS41);
- TCNT4 = 0;
- TIFR4 = _BV(OCF4A);
- TIMSK4 = _BV(OCIE4A) ;
- }
- #endif
-
- #if defined(_useTimer5)
- if (timer == _timer5) {
- TCCR5A = 0;
- TCCR5B = _BV(CS51);
- TCNT5 = 0;
- TIFR5 = _BV(OCF5A);
- TIMSK5 = _BV(OCIE5A) ;
- }
- #endif
- }
-
- static void finISR(timer16_Sequence_t timer) {
-
- #if defined(WIRING)
- if (timer == _timer1) {
- #if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
- TIMSK1
- #else
- TIMSK
- #endif
- &= ~_BV(OCIE1A);
- timerDetach(TIMER1OUTCOMPAREA_INT);
- }
- else if (timer == _timer3) {
- #if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
- TIMSK3
- #else
- ETIMSK
- #endif
- &= ~_BV(OCIE3A);
- timerDetach(TIMER3OUTCOMPAREA_INT);
- }
- #else
-
- #endif
- }
-
- static boolean isTimerActive(timer16_Sequence_t timer) {
-
- for(uint8_t channel=0; channel < SERVOS_PER_TIMER; channel++) {
- if (SERVO(timer,channel).Pin.isActive)
- return true;
- }
- return false;
- }
-
-
-
-
- Servo::Servo() {
- if ( ServoCount < MAX_SERVOS) {
- this->servoIndex = ServoCount++;
- servos[this->servoIndex].ticks = usToTicks(DEFAULT_PULSE_WIDTH);
- }
- else
- this->servoIndex = INVALID_SERVO;
- }
-
- uint8_t Servo::attach(int pin) {
- return this->attach(pin, MIN_PULSE_WIDTH, MAX_PULSE_WIDTH);
- }
-
- uint8_t Servo::attach(int pin, int min, int max) {
- if (this->servoIndex < MAX_SERVOS ) {
- #if defined(ENABLE_AUTO_BED_LEVELING) && (PROBE_SERVO_DEACTIVATION_DELAY > 0)
- if (pin > 0) this->pin = pin; else pin = this->pin;
- #endif
- pinMode(pin, OUTPUT);
- servos[this->servoIndex].Pin.nbr = pin;
-
- this->min = (MIN_PULSE_WIDTH - min) / 4;
- this->max = (MAX_PULSE_WIDTH - max) / 4;
-
- timer16_Sequence_t timer = SERVO_INDEX_TO_TIMER(servoIndex);
- if (!isTimerActive(timer)) initISR(timer);
- servos[this->servoIndex].Pin.isActive = true;
- }
- return this->servoIndex;
- }
-
- void Servo::detach() {
- servos[this->servoIndex].Pin.isActive = false;
- timer16_Sequence_t timer = SERVO_INDEX_TO_TIMER(servoIndex);
- if (!isTimerActive(timer)) finISR(timer);
- }
-
- void Servo::write(int value) {
- if (value < MIN_PULSE_WIDTH) {
- if (value < 0) value = 0;
- if (value > 180) value = 180;
- value = map(value, 0, 180, SERVO_MIN(), SERVO_MAX());
- }
- this->writeMicroseconds(value);
- }
-
- void Servo::writeMicroseconds(int value) {
-
- byte channel = this->servoIndex;
- if (channel < MAX_SERVOS) {
- if (value < SERVO_MIN())
- value = SERVO_MIN();
- else if (value > SERVO_MAX())
- value = SERVO_MAX();
-
- value = value - TRIM_DURATION;
- value = usToTicks(value);
-
- uint8_t oldSREG = SREG;
- cli();
- servos[channel].ticks = value;
- SREG = oldSREG;
- }
- }
-
-
- int Servo::read() { return map( this->readMicroseconds()+1, SERVO_MIN(), SERVO_MAX(), 0, 180); }
-
- int Servo::readMicroseconds() {
- return (this->servoIndex == INVALID_SERVO) ? 0 : ticksToUs(servos[this->servoIndex].ticks) + TRIM_DURATION;
- }
-
- bool Servo::attached() { return servos[this->servoIndex].Pin.isActive; }
-
- #endif
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