How to define event and event handler

[qoboty]

when I use softDevice S110, there exists ble_evt_dispatch function, Can I define event ? if I can, how to define event and how to use event handler . Thank you !

[shibshab]

The events come from the S110, and you can not define these events yourself.

To handle these event, set the handler function by calling softdevice_handler_set if you are using the softdevice handler from the SDK. If you are not using the softdevice handler from the SDK you can handle these events by calling sd_ble_evt_get directly.

[fanqh]

first sorry for my english , i can not find sofedevice_handler_set message, and the write charactristic operate will gernerate what events?

[fanqh]

static uint32_t jawbone_char_TriggerEventHistoryReset_add(ble_jawbone_t * p_jawbone, const ble_jawbone_init_t * p_jawbone_init)
{
    uint32_t            err_code;
    ble_gatts_char_md_t char_md;
    ble_gatts_attr_t    attr_char_value;
    ble_uuid_t          ble_uuid;
    ble_gatts_attr_md_t attr_md;
		ble_srv_cccd_security_mode_t  char_attr_security_mode_md;

    BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&char_attr_security_mode_md.read_perm);
    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&char_attr_security_mode_md.write_perm);
	

    memset(&char_md, 0, sizeof(char_md));
    char_md.char_props.read   = 0;
		char_md.char_props.write   = 1;
    char_md.p_char_user_desc  = NULL;
    char_md.p_char_pf         = NULL;
    char_md.p_user_desc_md    = NULL;
    char_md.p_cccd_md         = NULL;
    char_md.p_sccd_md         = NULL;

    BLE_UUID_BLE_ASSIGN(ble_uuid, UUID_TRIGGER_EVENT_HISTORY_RESET_CHAR);

    memset(&attr_md, 0, sizeof(attr_md));

    attr_md.read_perm  = char_attr_security_mode_md.read_perm;
    attr_md.write_perm = char_attr_security_mode_md.cccd_write_perm;
    attr_md.vloc       = BLE_GATTS_VLOC_STACK;
    attr_md.rd_auth    = 0;
    attr_md.wr_auth    = 0;
    attr_md.vlen       = 0;

    memset(&attr_char_value, 0, sizeof(attr_char_value));

    attr_char_value.p_uuid    = &ble_uuid;
    attr_char_value.p_attr_md = &attr_md;
    attr_char_value.init_len  = TRIGGER_EVENT_DATA_LEN;
    attr_char_value.init_offs = 0;
    attr_char_value.max_len   = TRIGGER_EVENT_DATA_LEN;
   attr_char_value.p_value = "abcde"; 
    err_code = sd_ble_gatts_characteristic_add(p_jawbone->service_handle, &char_md,
                                               &attr_char_value,
                                               &p_jawbone->TriggerEventHistoryReset_handle);	
		if (err_code != NRF_SUCCESS)
    {
        return err_code;
    }
		return NRF_SUCCESS;
}	

[MartinBL]

Try to search for softdevice_ble_evt_handler_set();. This is the function used in SDK 9 to register the ble_evt_dispatch() event handler.

What do you mean exactly by "and the write characteristic operate will generate what events"? When you perform a write operation the GATT event "BLE_GATTS_EVT_WRITE" will be passed to ble_evt_dispatch()

[MartinBL]

Is there a question here?