how to count pulse with nrf51822 : revisited

Question

I am trying to implement the pulse counting mentioned in a previous post of the same name, but the code is eluding me. I am using the heart rate service example with new code shown below. Tomorrow I will instrument the code more, but I could use some guidance as to if I am on the right track.

/** @brief Function for initializing the Timer 2 peripheral as a Counter. */
static void timer2_init(void)	 
{
    NRF_TIMER2->MODE  = TIMER_MODE_MODE_Counter;
    NRF_TIMER2->TASKS_CLEAR = 1;		// Sets Count to 0.
    NRF_TIMER2->BITMODE   = TIMER_BITMODE_BITMODE_16Bit << TIMER_BITMODE_BITMODE_Pos;
    NRF_TIMER2->TASKS_START = 1;		// Start Counting        	  
}

/** @brief Function for initializing the GPIO Tasks/Events peripheral. */
static void gpiote_init(void)
{   
    APP_GPIOTE_INIT(APP_GPIOTE_MAX_USERS);	 
    nrf_gpio_cfg_input(PWM_INPUT_PIN_NUMBER, NRF_GPIO_PIN_PULLUP);	// Configure PWM_INPUT_PIN_NUMBER as an input.
    nrf_gpio_cfg_sense_input(PWM_INPUT_PIN_NUMBER, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);	 
}

/** @brief Function for initializing the Programmable Peripheral Interconnect peripheral. */
static void ppi_init(void)
{
    // Configure PPI channel 0 to increment Counter on every time PWM input pin changes
    NRF_PPI->CH[1].EEP = (uint32_t)&NRF_GPIOTE->EVENTS_PORT; 
    NRF_PPI->CH[1].TEP = (uint32_t)&NRF_TIMER2->TASKS_COUNT;

    // Enable PPI channels 0-2.
    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);
}

/*****************************************************************************

Main Function *****************************************************************************/

/**@brief Function for the application main entry. */ int main(void) { uint32_t err_code;

  timers_init();
  gpiote_init();
  buttons_init();
  timer2_init();
  ppi_init();	
  ble_stack_init();
  device_manager_init();

  // Initialize Bluetooth Stack parameters.
  gap_params_init();
  advertising_init();
  services_init();
  conn_params_init();

  // Start advertising.
  advertising_start();

  // Enter main loop.
  for (;;)
  {
      // Switch to a low power state until an event is available for the application
      err_code = sd_app_evt_wait();
      APP_ERROR_CHECK(err_code);
      // Read Counter value
      NRF_TIMER2->TASKS_CAPTURE[0];
      m_cur_heart_rate = NRF_TIMER2->CC[0];	
  }

}