Timer Disturb Main Loop

[Sagisawa Yukichi]

main.c y_timer.c y_timer.h

Hi, I wanted to make the function that get timestamp like mills(). I made this code bellow. It does'nt move well. Main loop is unintentionally end, nrf52 is reset. What brought this on?

Thanks,

//Code for getting timestamp
#include "y_timer.h"

#include "app_timer.h"
#include "stdint.h"

#define APP_TIMER_PRESCALER              0                                          /**< Value of the RTC1 PRESCALER register. */
#define APP_TIMER_OP_QUEUE_SIZE          4                                          /**< Size of timer operation queues. */

#define SENSOR_CONTACT_DETECTED_INTERVAL APP_TIMER_TICKS(1000, APP_TIMER_PRESCALER) /**< Sensor Contact Detected toggle interval (ticks). */

APP_TIMER_DEF(m_sensor_contact_timer_id);
static unsigned long ul_pasttime;

static void timer_timeout_handler(void * p_context)
{
    UNUSED_PARAMETER(p_context);
    ul_pasttime++;
}

void timers_init(void) //設定
{
    uint32_t err_code;
    ul_pasttime = 0;
	
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
    err_code = app_timer_create(&m_sensor_contact_timer_id,
                                APP_TIMER_MODE_REPEATED,
                                timer_timeout_handler);
    APP_ERROR_CHECK(err_code);
}

void application_timers_start(void)
{
    uint32_t err_code;

    err_code = app_timer_start(m_sensor_contact_timer_id, SENSOR_CONTACT_DETECTED_INTERVAL, NULL);
    APP_ERROR_CHECK(err_code);
}
unsigned long millis(void){
	return ul_pasttime;
}



//Main.c
void Sub(){
    int i_data = Data_Load();
    unsigned long * ul_time = 0;
    get_ms(ul_time);
    printf("timestamp:%lu",*ul_time);
    printf("i_data = %d\r\n",i_data);
}

int main(void) {
	

    device_init(); //Abridgement

    timers_init();
    application_timers_start();

    while(1){
	Sub();
	delay_ms(100);
    }
		
}

[MartinBL]

The app_timer library uses RTC1 as a timer and the Low Frequency 32.768kHz clock as the clock source. However, app_timer doesn't start the LF clock so this has to be done by you. A simple way to do it is like this:

NRF_CLOCK->TASKS_LFCLKSTART = 1;
while(NRF_CLOCK->EVENTS_LFCLKSTARTED != 1)
{
    ;
}