How can I prevent system reset?

RE: How can I prevent system reset?

MartinBL — Fri, 27 Oct 2017 10:58:03 GMT

There are many lines of code inside ble_nus_c_on_ble_evt(). Please put a breakpoint in it and see if you can step through the function. There is probably also a function called ble_nus_c_evt_handler(), or similar, in your main.c file. It might be worth setting a breakpoint in there too, and see if any of the function calls inside it return any errors.

RE: How can I prevent system reset?

purgoufr — Tue, 24 Oct 2017 05:53:02 GMT

I can not follow it with the Debugger(Usually freezes in "ble_nus_c_on_ble_evt(&m_ble_nus_c,p_ble_evt);" function). But every time the program is restarted I can reach the result that the device is reset because the led is on.

int main(void)
{
    uint32_t err_code;

    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
	
    ble_stack_init();
    
    err_code = ble_db_discovery_init();
    APP_ERROR_CHECK(err_code);
    
    nus_c_init();
    timers_init();

    nrf_gpio_cfg_output(LED0);
    nrf_gpio_pin_set(LED0);	
    nrf_delay_ms(1000);
    nrf_gpio_pin_clear(LED0);
for(;;)
{}

RE: How can I prevent system reset?

MartinBL — Thu, 19 Oct 2017 07:40:10 GMT

So where inside ble_stack_init() do things go wrong? Have you stepped through the function with a debugger?

RE: How can I prevent system reset?

purgoufr — Wed, 18 Oct 2017 14:00:12 GMT

Because I want to do continuous rssi measurement. And I do not know if I have any other way to do this.(Theoritically, Timeslot can solve the problem, but I do not have enough knowledge about it yet.)

On th other hand, I do not think the system has restarted itself because of a APP_ERROR_CHECK. I think it has been reset cause of ble_stack_init function (I mean softdevice). I read this link The system seems to be running a watchdog, and when it is finished, the program starts again from stack_init. But I'm not sure about the possibilities.

RE: How can I prevent system reset?

MartinBL — Wed, 18 Oct 2017 11:22:35 GMT

Why do you call app_timer_start() over and over in an endless for() loop?

The system resets itself by default if a function returns an error which is then checked by APP_ERROR_CHECK(err_code);. You should debug it like this.