when code run in ble_advertising_start,return errcode 8

[zjk]

i have used a example of ble_app_template in ble_peripheral of SDK15.0,when code run in ble_advertising_start,return errcode 8.

i have checked  low speed Crystals，it's ok。 i don not no  what's happen .please give some advice,thank you.

[Hung Bui]

If you check the ble_advertising_start() description in ble_advertising.h you will find that error core 8 equal NRF_ERROR_INVALID_STATE. This happens when you call ble_advertising_start() before the library initialized using ble_advertising_init(). 

[zjk]

it is my code:

int main(void)
{
    bool erase_bonds;


    // Initialize.
    log_init();                                
    timers_init();                        
 //   buttons_leds_init(&erase_bonds);
    power_management_init();   

      ble_stack_init();             
    gap_params_init();            
    gatt_init();                           
    advertising_init();              
    services_init();         
    conn_params_init();     

    peer_manager_init();     
    nrf_delay_ms(2000);
    // Start execution.
    NRF_LOG_INFO("Template example started.");
    application_timers_start();

    advertising_start(erase_bonds);

    // Enter main loop.
    for (;;)
    {
        idle_state_handle();
    }
}

i download this code in DK ,it runs ok.but i download in my board,it has this problem.

i am not sure  if it's due to a board problem. my board can run spi peripherals  without ble function.

[Hung Bui]

Please check if your board has the 32kHz crystal or not. 

[zjk]

The 32K crystal waveform is normal，

The circuit is the same as the official circuit，

the code is in nRF5_SDK_15.0.0_a53641a\examples\ble_peripheral\ble_app_template\pca10040\s132\arm5_no_packs

Can you determine if it's a board problem or a code problem

[zjk]

my PCB info:4 layer board（TOP layer 、  singal1 layer、singal2 layer、bottom layer），PCB thickness is 1.6,Copper thick is 0.5 OZ，

[Hung Bui]

It seems normal. Please try stepping into the code and find where exactly it throw error code 8 and why.