How to send data when NOTIFICATION is acticve?

Question

I need to send a data package when radio is ON every time 
 but I try to send data by "sd_ble_gatts_hvx()" I find it can not work,it seems that I can't call this API to send data. 
 I what to know how to use SWI1_IRQHandler , if I what to prepare and send data what can I do? 
 void data_send_on_radio_active_evt(bool radio_active)
{
 m_radio_active = radio_active; 
 if((radio_active == true) &&(mouse_enable == true)){	
 if(mouse_enable == true)
 data_prepare(); 
	else 
 data_send(); //call sd_ble_gatts_hvx() to send data
}

/**@brief Function for initializing the Radio Notification event.
 */
static void radio_notification_init(void)
{
 uint32_t err_code;

 err_code = ble_radio_notification_init(NRF_APP_PRIORITY_HIGH,
 NRF_RADIO_NOTIFICATION_DISTANCE_5500US,
 data_send_on_radio_active_evt);

 APP_ERROR_CHECK(err_code);
}
 
 data_send() will call 
 hvx_params.handle = p_hids->boot_mouse_inp_rep_handles.value_handle;
 hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
 hvx_params.offset = 0;
 hvx_params.p_len = &hvx_len;
 hvx_params.p_data = buffer;
 
 err_code = sd_ble_gatts_hvx(p_hids->conn_handle, &hvx_params);
 
 to send data by ble. 
 data_prepare(); will cast about 0.3ms , and I think it's ok when I set NRF_RADIO_NOTIFICATION_DISTANCE_5500US,

Ole Morten · Accepted Answer

I believe that the code snippet you show here will cause a HardFault. Remember that you can't call softdevice API functions from APP_HIGH, so instead, you need to set a flag or put an event in the scheduler queue to actually send the data. 
 You can read more about this here , and in the Reference Manual section that refers to.