BLE hci command aci_gatt_update_char_value_ext

[DS.4]

Can anyone tell me what Update_Type parameter does in this fucntion?

tBleStatus aci_gatt_update_char_value_ext( uint16_t Conn_Handle_To_Notify,
 
                      uint16_t Service_Handle,
 
                      uint16_t Char_Handle,
 
                      uint8_t Update_Type,  // ------->  What values can it get? What does it do?
 
                      uint16_t Char_Length,
 
                      uint16_t Value_Offset,
 
                      uint8_t Value_Length,
 
                      const uint8_t* Value )
 

Is there any description documentation regarding the hci BLE messaging to BLE side?

Thansk?

[BStic.1 · Accepted solution]

Check out the header file that contains the prototype, it explains the options.

/**
 * @brief ACI_GATT_UPDATE_CHAR_VALUE_EXT
 * This command is a more flexible version of ACI_GATT_UPDATE_CHAR_VALUE to
 * support update of long attribute up to 512 bytes and indicate selectively
 * the generation of Indication/Notification.
 * 
 * @param Conn_Handle_To_Notify Connection handle to notify. Notify all
 *        subscribed clients if equal to 0x0000
 * @param Service_Handle Handle of service to which the characteristic belongs
 * @param Char_Handle Handle of the characteristic declaration
 * @param Update_Type Allow Notification or Indication generation,
 *         if enabled in the client characteristic configuration descriptor
 *        Flags:
 *        - 0x00: Do not notify
 *        - 0x01: Notification
 *        - 0x02: Indication
 * @param Char_Length Total length of the characteristic value.
 *        In case of a variable size characteristic, this field specifies the
 *        new length of the characteristic value after the update; in case of
 *        fixed length characteristic this field is ignored.
 * @param Value_Offset The offset from which the attribute value has to be
 *        updated.
 * @param Value_Length Length of the Value parameter in octets
 * @param Value Updated characteristic value
 * @return Value indicating success or error code.
 */
tBleStatus aci_gatt_update_char_value_ext( uint16_t Conn_Handle_To_Notify,
                                           uint16_t Service_Handle,
                                           uint16_t Char_Handle,
                                           uint8_t Update_Type,
                                           uint16_t Char_Length,
                                           uint16_t Value_Offset,
                                           uint8_t Value_Length,
                                           const uint8_t* Value );