Exemplos de SOFTPWM_TIMER_INIT em C++ (Cpp)

Exemplo n.º 1

Arquivo: lib_SoftPWM.cpp Projeto: ignaworn/Arduino-Webserver

void SoftPWMBegin(uint8_t defaultPolarity)
{
  // We can tweak the number of PWM period by changing the prescalar
  // and the OCR - we'll default to ck/8 (CS21 set) and OCR=128.
  // This gives 1024 cycles between interrupts.  And the ISR consumes ~200 cycles, so
  // we are looking at about 20 - 30% of CPU time spent in the ISR.
  // At these settings on a 16 MHz part, we will get a PWM period of
  // approximately 60Hz (~16ms).

  uint8_t i;

#ifdef WIRING
  Timer2.setMode(0b010);  // CTC
  Timer2.setClockSource(CLOCK_PRESCALE_8);
  Timer2.setOCR(CHANNEL_A, SOFTPWM_OCR);
  Timer2.attachInterrupt(INTERRUPT_COMPARE_MATCH_A, SoftPWM_Timer_Interrupt);
#else
  SOFTPWM_TIMER_INIT(SOFTPWM_OCR);
#endif



  for (i = 0; i < SOFTPWM_MAXCHANNELS; i++)
  {
    _softpwm_channels[i].pin = -1;
    _softpwm_channels[i].polarity = SOFTPWM_NORMAL;
    _softpwm_channels[i].outport = 0;
    _softpwm_channels[i].fadeuprate = 0;
    _softpwm_channels[i].fadedownrate = 0;
  }

  _softpwm_defaultPolarity = defaultPolarity;
}

Exemplo n.º 2

Arquivo: SoftPWM.cpp Projeto: Quirade/TiltyIMU

void SoftPWMBegin(void)
{
  // We can tweak the number of PWM period by changing the prescalar
  // and the OCR - we'll default to ck/8 (CS21 set) and OCR=128.
  // This gives 1024 cycles between interrupts.  And the ISR consumes ~200 cycles, so
  // we are looking at about 20 - 30% of CPU time spent in the ISR.
  // At these settings on a 16 MHz part, we will get a PWM period of
  // approximately 60Hz (~16ms).

  uint8_t i;

  SOFTPWM_TIMER_INIT(SOFTPWM_OCR);

  for (i = 0; i < SOFTPWM_MAXCHANNELS; i++)
  {
    _softpwm_channels[i].pin = -1;
    _softpwm_channels[i].fadeuprate = 0;
    _softpwm_channels[i].fadedownrate = 0;
  }
}