PWM PPI timer_handler

[lkhsnow]

Hi,everyone I want to make out 4 channel PWM with PPI and two timers , PPI configuration like this,

/* Configure PPI channel 0 to toggle PWM_OUTPUT_PIN on every Timer 2 COMPARE[0] match. */
NRF_PPI->CH[0].EEP  = (uint32_t)&NRF_TIMER1->EVENTS_COMPARE[0];
NRF_PPI->CH[0].TEP  = (uint32_t)&NRF_GPIOTE->TASKS_OUT[0];
/* Configure PPI channel 1 to toggle PWM_OUTPUT_PIN on every Timer 2 COMPARE[1] match. */
NRF_PPI->CH[1].EEP  = (uint32_t)&NRF_TIMER1->EVENTS_COMPARE[1];
NRF_PPI->CH[1].TEP  = (uint32_t)&NRF_GPIOTE->TASKS_OUT[0];

    /* Configure PPI channel 2 to toggle PWM_OUTPUT_PIN on every Timer 2 COMPARE[0] match. */
NRF_PPI->CH[2].EEP  = (uint32_t)&NRF_TIMER1->EVENTS_COMPARE[0];
NRF_PPI->CH[2].TEP  = (uint32_t)&NRF_GPIOTE->TASKS_OUT[1];
/* Configure PPI channel 3 to toggle PWM_OUTPUT_PIN on every Timer 2 COMPARE[2] match. */
NRF_PPI->CH[3].EEP  = (uint32_t)&NRF_TIMER1->EVENTS_COMPARE[2];
NRF_PPI->CH[3].TEP  = (uint32_t)&NRF_GPIOTE->TASKS_OUT[1];

is this right?

another queston is when I use sd_nvic_EnableIRQ , timer_handler function can not be called, but when I use NVIC_EnableIRQ, the EK board's blue tooth function stop working;

here is the code:

      sd_nvic_SetPriority(TIMER1_IRQn,3);
  sd_nvic_SetPriority(TIMER2_IRQn,3);

// Enable interrupt on Timer
//NVIC_EnableIRQ(TIMER1_IRQn);
//NVIC_EnableIRQ(TIMER2_IRQn);

  sd_nvic_EnableIRQ(TIMER1_IRQn);
  sd_nvic_EnableIRQ(TIMER2_IRQn);
     __enable_irq();

[lkhsnow]

and timer_handler

  void TIMER1_IRQHandler(void)
  {
    NRF_TIMER1->TASKS_STOP = 1;
    NRF_TIMER1->TASKS_CLEAR= 1;
    // Clear interrupt.
    if ((NRF_TIMER1->EVENTS_COMPARE[3] == 1) && 
    (NRF_TIMER1->INTENSET & TIMER_INTENSET_COMPARE3_Msk))
    {
     NRF_TIMER1->EVENTS_COMPARE[3] = 0;
    }	
    NRF_TIMER1->EVENTS_COMPARE[0] = NRF_TIMER1->EVENTS_COMPARE[1] = 0 ;
     NRF_TIMER->EVENTS_COMPARE[2] = NRF_TIMER1->EVENTS_COMPARE[3] = 0;
       nrf_gpiote_unconfig(0);
       nrf_gpiote_unconfig(1);
       nrf_gpio_pin_clear(PWM_OUTPUT_PIN_NUMBER0);
       nrf_gpio_pin_clear(PWM_OUTPUT_PIN_NUMBER1);
       nrf_gpiote_task_config(0, PWM_OUTPUT_PIN_NUMBER0, NRF_GPIOTE_POLARITY_TOGGLE, \
       NRF_GPIOTE_INITIAL_VALUE_LOW);
       nrf_gpiote_task_config(1, PWM_OUTPUT_PIN_NUMBER1, NRF_GPIOTE_POLARITY_TOGGLE, \
       NRF_GPIOTE_INITIAL_VALUE_HIGH);
       pwm_chanel_set1();		//reset the timer with new value
       NRF_TIMER1->TASKS_START = 1;
     }

[lkhsnow]

I have found the reason： ble_stack_init() must finish before sd_ppi_ sd_nvic_ ,and other sd_ function;

[Stian Røed Hafskjold]

Yes, that is true! I'm glad you found the reason. Sorry I couldn't be of more help. Is it okay that I close the question since it's been resolved?