Bluetooth service stops after some time

[Sergy]

Hi,

Im using SD5 and after some time (every time different) of transmitting HRS data the SD stops apparently, because there is no more connection with my Android phone and the device becomes invisible as well.

It only happens when I use Timer2 to generate PWM however.

So here is my timer interrupt and init functions:

void TIMER2_IRQHandler()
{
	
	if(beepOn && makeBeep>0 && NRF_TIMER2->EVENTS_COMPARE[1]!=0)
	{
		if(beepCycles%2==0)
		{
			nrf_gpio_pin_toggle(BEEPER_PIN);
		}
		beepCycles++;
		if(beepCycles==120)
		{
			beepCycles=0;
			makeBeep--;
			nrf_gpio_pin_clear(BEEPER_PIN);
		}
		
	}
	if(NRF_TIMER2->EVENTS_COMPARE[1]!=0)NRF_TIMER2->EVENTS_COMPARE[1]=0;





static void pwm_timer_init(void)
{
    
    NRF_TIMER2->MODE        = TIMER_MODE_MODE_Timer;
    NRF_TIMER2->BITMODE     = TIMER_BITMODE_BITMODE_16Bit << TIMER_BITMODE_BITMODE_Pos;
    NRF_TIMER2->PRESCALER   = 0;

    // Clears the timer, sets it to 0.
    NRF_TIMER2->TASKS_CLEAR = 1;

    
    NRF_TIMER2->CC[0] = 355;
		
NRF_TIMER2->SHORTS = (TIMER_SHORTS_COMPARE1_CLEAR_Enabled << TIMER_SHORTS_COMPARE1_CLEAR_Pos) & TIMER_SHORTS_COMPARE1_CLEAR_Msk;
     

		
    NRF_TIMER2->CC[1] = 8000;
NRF_TIMER2->CC[2] = 0;
    // Interrupt setup.
    NRF_TIMER2->INTENSET = (TIMER_INTENSET_COMPARE1_Enabled << TIMER_INTENSET_COMPARE1_Pos);
		
		NRF_TIMER2->EVENTS_COMPARE[0]=NRF_TIMER2->EVENTS_COMPARE[1]=NRF_TIMER2->EVENTS_COMPARE[2]=0;

    // Enable interrupt on Timer 2.
		
		
	
 sd_nvic_SetPriority(TIMER2_IRQn, PWM_IRQ_PRIORITY | 0x01);
   sd_nvic_EnableIRQ(TIMER2_IRQn);

    // Start the timer.
    NRF_TIMER2->TASKS_START = 1;

}

The app_error_handler is never called, but if I stop a debug session, I get the following:

Any ideas what could be wrong?

Thanks, Sergey

[Nikita]

You're using S110 v5 with SDK 5.2? Maybe its some incompatibility when using S110 v5 with SDK 5.2 because in SDK 5.2 release notes there is only S110 v6 support stated.

[Sergy]

I was using GPIOTE Interrupt handler and inside I had a sprintf. I assume that sprintf just takes too much time and that killed BT services in some cases. Once I removed the sprintf from interrupt handler BT services worked just fine.