The Realization And Application Of The Bluetooth File Transfer Profile Protocol

Bluetooth is a kind of short distance wireless communication technology with the open technological specification. The Bluetooth-based equipments, which hold such attractive characteristics as small size and low cost, can easily be integrated with some electronic devices operated under the environment of embedded software system, such as mobile phone, palmtop computer, Personal Digital Assistant(PDA), etc. So, the applicating scope of these integrated electronic devices can be extended to make subscribers convenient. This master degree research project has solved the wireless data transfer problems among the Bluetooth applications by means of analyzing the Bluetooth specification(1.2 version) , modeling and simulating the Bluetooth file transfer profile, designing and realizing the Bluetooth-based wireless flash disc. The summaries involved in this dissertation are as following: Firstly, the basic principle of Bluetooth wireless communication technologies and the relevant knowledge points requested to develop the utilitarian Bluetooth products were introduced in this dissertation. The protocol model and every layer specification, especially, the specification of application profiles in Bluetooth protocol version 1.2, were analyzed in detail. Secondly, The characteristics, the data packet structures, and the various kinds of operations in the data Object Exchange (OBEX) protocol layer were present in an all-round way. The performances and application environments of three models for realizing the Bluetooth file transfer profile, i.e. Standard Double Processors(SDP) model, Embedded Double Processors(EDP) model and Totally Embedded Processor(TEP) model, were compared along with the analysis of Bluetooth file transfer profile protocol. Thirdly, The Bluetooth file transfer profile protocol were simulated by choosing EDP model, using JINOU Bluetooth Developing Platform(JBDP), and programming the VC++ language. The simulating softwares and simulated results were also provided. In the simulation scheme, the JBDP executes the protocols under the RFCOMM layer in Bluetooth specifications, and the VC++ programs under Windows2000 environment operate the data packets dealing and file transfering functions defined in the OBEX protocol. The communication between the computer with Windows2000 operation system and the JBDP with embedded operation system was achieved through the RS232 serial port. Finally, based on the simulation results, with executing the protocols under RFCOMM layer in a specific Bluetooth chip and dealing the data operations defined in OBEX protocol in a micro control unit(MCU), a wireless flash disc with the EDP model structure was designed and realized . The reliable performances of the wireless flash disc were also certified by a set of test.