After add app_timer, the system can't work

[mento]

Hello, I used nRF5_SDK_12.1.0_0d23e2a, SoftDevice 8_9_0, the ble_app_uart_c example code.

I want to add the timer, after add the following code, my system can't work.

#define DELAY_INTERVAL          APP_TIMER_TICKS(1, APP_TIMER_PRESCALER)
static  app_timer_id_t              m_delay_timer_id;
volatile uint16_t                       timer_action_counter = 0;

static void delay_timerout_handler(void * p_context)    
{		
    UNUSED_PARAMETER(p_context);
		
    timer_action_counter++;
    if(!(timer_action_counter%1000))
    {
	printf("Work\r\n");
        timer_action_counter = 0;
    }	
}

static void Timer_Init(void)
{
    uint32_t err_code;
    
    //APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, NULL);
    err_code = app_timer_create(&m_delay_timer_id, APP_TIMER_MODE_REPEATED, delay_timerout_handler);
    
    APP_ERROR_CHECK(err_code);  
}

static void Timer_Start(void)
{	
    uint32_t err_code;
    err_code = app_timer_start(m_delay_timer_id, DELAY_INTERVAL, NULL);	
    
    APP_ERROR_CHECK(err_code);  
}

Please help me, Thanks!

[RK]

So which one of the err_code variables is not zero? The app has gone to the error handler because you have an error returned from one of the calls. use a debugger.

[mento]

The APP_ERROR_CHECK(err_code) have no response, I don't know how to use the IAR's debug mode... I used IAR build, and nRFgo Studio program.

[Stian Røed Hafskjold]

Why have you commented out APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, NULL); ? You should not do that. And you also need to increment APP_TIMER_OP_QUEUE_SIZE with 1 for every timer you add. It is defined in top of main.c

[mento]

Hello, The ble_app_uart_c example code is already called this function, so i commented out it. And i define APP_TIMER_OP_QUEUE_SIZE is 4.

int main(void) {

APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, NULL);

uart_init();
Timer_Init();
buttons_leds_init();
db_discovery_init();
ble_stack_init();
nus_c_init();

printf("Uart_c Scan started!\r\n");
scan_start();

Timer_Start();

while(1)
{  
    power_manage();
}

}

[Stian Røed Hafskjold]

APP_TIMER_OP_QUEUE_SIZE was originally 2 in the example. Increment with one. So, try to set it to 3. It should work then.