The two timers conflict

[hong min]

Greeting , Nordic team , i have some questions about my project. First , my hardware and software is following: nrf51422 (pca10028) SDK 9.0 SoftDevice S110

My project is a data logger that fetch the sensor data to mobile phone by BLE and display it on LCD, additionally , using LEDs show the status (connection/log status). It would manually fetch data by press button or automatically. The hardware always in advertising state , if there's no client pairing , still fetch sensor data and showing on LCD.

But the question is after I adding another app_timer for LEDs , the LEDs blinks but the sensor fetching module and BLE transmit working not well at all.

Here's my code: the timer init part

static void timers_init(void)
{
   uint32_t err_code;

  // Initialize timer module.
  APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);

  // create Temperature measurement timers
  app_timer_create(&m_temperature_timer_id,
                            APP_TIMER_MODE_REPEATED,
                            temp_meas_timeout_handler);


  // create LED flashing timers
  app_timer_create(&m_led_timer_id,
                             APP_TIMER_MODE_REPEATED,
                             led_timeout_handler);
}

the timer start part

    static void application_timers_start(void)
    {
       app_timer_start(m_temperature_timer_id, APP_TIMER_TICKS(2000, APP_TIMER_PRESCALER), NULL);
       app_timer_start(m_led_timer_id, APP_TIMER_TICKS(200, APP_TIMER_PRESCALER), NULL);
    }

The procedure would like this : First , initialize needs. Second , start advertising. Third, I declared and defined a global variable as finalData. I put the sensor fetching code in main loop and save the result to finalData. Finally , if the device have found mobile and finish bonding , transmit the data to mobile.

But heres a conflict that the LEDs blinking well , but the transmit data not works even though not connected to mobile.

So please tell me how to solve it ? Thanks! Happy New Year!

[Anders Strand]

Did you increase APP_TIMER_MAX_TIMERS ? Can you check if temp_meas_timeout_handler is called at all?

[hong min]

Yes, i have add the timer limitation. thanks you reply

[Anders Strand]

Can you check if temp_meas_timeout_handler is called at all? Can you also post the code for led_timeout_handler?

[hong min]

the temp timeout handler

static void temp_meas_timeout_handler(void * p_context)
{   
    temperature_measurement_send();
}

the led timeout handler

static void led_timeout_handler(void * p_context)
{
  if(led_flashing_flag)
  {
	    LEDS_INVERT( (1<<22) );
  }
  else
  {
	     LEDS_OFF( (1<<22) );
  } 
}

the main :

static uint32_t finalData;

int main (void)
{
 
   ble_setting();
   uart_setting();
   
   while(1)
   {
       float tempBuffer[100];
       float tempSum;
       for(int i =0 ; i<100 ; i++)
       {
             temperBuffer[i]=fetchTemperature();
             nrf_delay_ms(20);
             tempSum+= temperBuffer[i];
       }
      
       finalData=tempSum/100.0;
       nrf_delay_ms(100);
       printf("The temp is %.2f\r\n" , finalData);
   }

}