| To meet the need of Integrated Navigation Computer's micromation and high performance so as to enlarge its application on field, the Integrated Navigation System design based a floating-piont DSP(TMS320C6713) and FPGA (EP1C 12 N240) is researched in this paper.This paper brings forward Integrated Navigation Computer scheme based DSP and FPGA according to its characteristic and application requirement. In this scheme, DSP is used to be a processor, FPGA completed by the IMU signal acquisition and cache and system integration control signal. DSP interfaces to FPGA by DSP's EMIF, following this scheme is research of I/O interface, schematic and PCB (print circuit board) of the hardware system, and in the use of FPGA called IP core to achieve FIR low-pass filter data processor Buffeting laser gyro aircraft buffeting vibration. Secondly, elaborated on the use of TI's DSP Integrated Development Environment and DSP/BIOS real-time operating system software development of multi-task specific programs. In this paper, the introduction of DSP / BIOS real-time operating system to provide multi-tasking mechanism to deal with the acquisition of four relatively independent functional tasks that the DSP / BIOS scheduling, in accordance with user-specified priority to run, greatly improve the system efficiency. Finally, introduce the way of the DSP chip Bootloader.The research of the Navigation Computer System is the process combined with software and hardware. On the base of system design, the paper introduces the design of the hardware and the flow of software's research firstly. Then, the function of the system's module and the key of this research is discussed, including the module of data communication, the module of analog signal's collection and the module of data storing. Finally, the Navigation Computer System is debugged together with all the module, also the system is tested in detail. The Navigation Computer System is established To DSP/FPGA hardware platform as the navigation computer of strapdown inertial navigation system, real-time data to meet the system requirements of high-precision, real-time, stability requirements ,to adapt its high-performance, low-cost, low-power development. |
