HardFault with s110

[ryan.jang]

Hi.

I have received down the source of the example of experimental_ble_app_uart in my keil.

I use register.(NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;)

but, Hardfault occurs.

For example,

main.c

/**@brief  Application main function.
 */
int main(void)
{
    uint8_t start_string[] = START_STRING;
    uint32_t err_code;
    // Initialize
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);
    APP_GPIOTE_INIT(APP_GPIOTE_MAX_USERS);
    ble_stack_init();
    uart_init();

    err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS, APP_TIMER_TICKS(100, APP_TIMER_PRESCALER), NULL);
    APP_ERROR_CHECK(err_code);
    err_code = bsp_buttons_enable(1 << WAKEUP_BUTTON_ID);
    APP_ERROR_CHECK(err_code);
    gap_params_init();
    services_init();
    advertising_init();
    conn_params_init();
    sec_params_init();
    
    simple_uart_putstring(start_string);
    
    advertising_start();
 
   **NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
   NRF_CLOCK->TASKS_HFCLKSTART    = 1;
	
	   
    // Wait for the external oscillator to start up.
    while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
    {
        // Do nothing.
    }**

    // Enter main loop
    for (;;)
    {
        power_manage();
    }
}

[Håkon Alseth]

Hi,

NRF_CLOCK is a restricted peripheral when using the Softdevice. This means that you can only access it through the SoftDevice API. Please see the SoftDevice Specification for more details on which peripherals are OK to access directly.

Use the API when the softdevice is enabled: developer.nordicsemi.com/.../a01073.html

Cheers, Håkon