void profile_timer_init(void){
/* Initialize the HF clock if it is not already running*/
hfclk_xtal_init();
NRF_TIMER0->TASKS_STOP = 1; // Stop timer.
NRF_TIMER0->MODE = TIMER_MODE_MODE_Timer; // Set the timer in Timer Mode.
NRF_TIMER0->PRESCALER = TIMER0_PRESCALER; // Prescaler 0 produces 16 MHz.
NRF_TIMER0->BITMODE = TIMER0_BITSIZE; // 32 bit mode.
NRF_TIMER0->TASKS_CLEAR = 1; // clear the task first to be usable for later.
NRF_TIMER0->TASKS_START = 1; // Start timer.
}
/* Initialize the RTIMER using TIMER0 */
void timer_init(void){
/* Initialize the HF clock if it is not already running*/
hfclk_xtal_init();
NRF_TIMER0->TASKS_STOP = 1; // Stop timer.
NRF_TIMER0->MODE = TIMER_MODE_MODE_Timer; // Set the timer in Timer Mode.
NRF_TIMER0->PRESCALER = TIMER_PRESCALER; // Prescaler 0 produces 16 MHz.
NRF_TIMER0->BITMODE = TIMER_BITSIZE; // 32 bit mode.
NRF_TIMER0->TASKS_CLEAR = 1; // clear the task first to be usable for later.
/* NRF_TIMER0->EVENTS_COMPARE[0] = 0;
NRF_TIMER0->CC[0] = 128;
// Enable overflow event and overflow interrupt:
NRF_TIMER0->INTENSET = TIMER_INTENSET_COMPARE0_Msk;
NVIC_EnableIRQ(TIMER0_IRQn); // Enable Interrupt for TIMER0 in the core. */
NRF_TIMER0->TASKS_START = 1; // Start timer.
}
/** \brief Initialize the RTIMER using TIMER0.
* This function makes sure the high frequency clock is running,
* initializes TIMER0 based on the parameters defined in
* \ref nrf-rtimer-definitions "Macros for RTIMER using nrf51822"
* and initializes the compare 0 interrupt.
*/
void
rtimer_arch_init (void)
{
/* Check if the HF clock is running*/
if ((NRF_CLOCK->HFCLKSTAT & CLOCK_HFCLKSTAT_STATE_Msk) == 0)
{
hfclk_xtal_init ();
}
/* Clear the task to make sure the timer is stopped */
NRF_TIMER0->TASKS_CLEAR = 1;
/* Set the timer in Timer Mode */
NRF_TIMER0->MODE = TIMER_MODE_MODE_Timer;
/* Prescaler 0 produces 16MHz timer tick frequency */
NRF_TIMER0->PRESCALER = TIMER_PRESCALER;
/* 32 bit mode */
NRF_TIMER0->BITMODE = TIMER_BITSIZE;
/* Enable the Compare event on 0th channel */
NRF_TIMER0->EVENTS_COMPARE[0] = 0;
/* Enable overflow event and overflow interrupt */
NRF_TIMER0->INTENSET = TIMER_INTENSET_COMPARE0_Msk;
/* Enable shorts for auto-reset
*
* This messes with the timestamping and RTIMER_NOW()
* Maybe not particulary needed right now.
*
* */
//NRF_TIMER0->SHORTS = TIMER_SHORTS_COMPARE0_CLEAR_Msk;
NVIC_SetPriority (TIMER0_IRQn, TIMER0_IRQ_PRI);
/* Start the timer */
NRF_TIMER0->TASKS_START = 1;
}
