PWM PPI timer_handler

Question

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();

Stian Røed Hafskjold · Accepted Answer

In your code you are only using TIMER1. If you want to use two different timers (as you say) to control two PWM signals, the ppi_init() would look something linke this:

static void ppi_init(void)
{
/* Configure PPI channel 0 to toggle PWM_OUTPUT_PIN1 on every Timer 1 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_PIN1 on every Timer 1 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_PIN2 on every Timer 2 COMPARE[0] match. */
NRF_PPI->CH[2].EEP  = (uint32_t)&NRF_TIMER2->EVENTS_COMPARE[0];
NRF_PPI->CH[2].TEP  = (uint32_t)&NRF_GPIOTE->TASKS_OUT[1];
	
/* Configure PPI channel 3 to toggle PWM_OUTPUT_PIN2 on every Timer 2 COMPARE[1] match. */
NRF_PPI->CH[3].EEP  = (uint32_t)&NRF_TIMER2->EVENTS_COMPARE[1];
NRF_PPI->CH[3].TEP  = (uint32_t)&NRF_GPIOTE->TASKS_OUT[1];

/* Enable only PPI channels 0 - 3. */
NRF_PPI->CHEN       = (PPI_CHEN_CH0_Enabled << PPI_CHEN_CH0_Pos) |
			          (PPI_CHEN_CH1_Enabled << PPI_CHEN_CH1_Pos) |
				      (PPI_CHEN_CH2_Enabled << PPI_CHEN_CH2_Pos) |
                      (PPI_CHEN_CH3_Enabled << PPI_CHEN_CH3_Pos);
}

When SoftDevice is enabled you must use sd_nvic_EnableIRQ(). If you would like to use the PWM library with SoftDevice you should check out this project on GitHub: github.com/.../nrf51-pwm-library