The Development Of Embedded Airborne Data Transmission Equipment Based On FPGA

With the development of the aviation industry, the new generation avionics system is becoming more and more integrated, and the design of the airborne equipment is also facing more and more a greater challenge.At present, many functions, small scale, low power consumption, good real- time performance, versatility, has become the focus of new airborne communications equipment research and development. Embedded system is a kind of system which can be used as center, soft and hardware can be cut out and time is high, so, it can meet the requirements of function, reliability, cost, volume and power consumption. Therefore, the application of embedded system design method in the application of airborne communication equipment becomes an inevitable trend.SoC(System on a Chip), which uses SoC technology, can lower the power consumption, reduce the hardware size and reduce the cost of the system development. FPGA is a lot of logic resources of highly integrated devices are integrated in a single chip, along with the progress of technology, chip density is more and more big, significantly lower power consumption, integrated programmable logic resource is more and more, even also has an integrated include memory, DSP module, clock circuit, configuration for a variety of interface standards I/ O pins, and a variety of core resources. With the combination of FPGA and SoC, the realization of programmable SoC, namely the SOPC, can not only on a single chip to realize the system function, and the special embedded system, can use soft/hardware co-design method, programming function of hardware to achieve the effect of hardware and software is changed, improve the design flexibility.In this thesis, the design scheme of embedded system based on FPGA is proposed, which is based on the SOPC and FPGA technology. Designers use the top-down design method, system design and function division of the whole system, the system of the core of the FPGA programming sys tem. In the scheme, the Virtex-5 XILINX series FPGA chip is used as the core of hardware and software development to realize the system task function. Using FPGA embedded PowerPC processor, equipped with strong real-time, high reliability of embedded real-time operating system VxWorks, the real-time and multi task data processing is complete. Development environment for the XILINX company to provide the EDK development kit for software and hardware collaborative development, the use of VHDL hardware descrip tion language and C++ programming. At the same time, the peripheral hardware circuit, including power circuit, clock circuit, reset circuit, external memory circuit, interface conversion and other system circuits and the design of the underlying driver are presented. Finally, the correctness of the design is verified by simulation and test, and the stability of the device is further verified by experiments and system tests.The main work of this paper is as follows:1. This paper briefly introduces the background and significance of the topic selection, and expounds the related theory and application of embedded design;2. Analysis of the specific requirements of the task, and the embedded design scheme based on FPGA is put forward, and reliability of preliminary demonstration project;3. To build the SOPC system with FPGA as the core, and focus on the design of the embedded hardware based on FPGA, which is based on EDK, the hardware design, the design and implementation of a small number of peripheral circuits. At the same time, the embedded software design with the hardware work, through the VxWorks operating system, the application of encoding to achieve high-speed data transmission and processing;4. Build simulation platform for simulation and debugging, build test environment to test and verify the function of the equipment;5. Through the test, compared with the index requirements, draw conclusions.