Application of DSP and FPGA Hybrid Architecture in Graphics Displaying System of EADI

摘要

At present the airborne displaying instrument has entered a large-screen，information integrated display and control period. The displaying system requires powerful processing ability in accordance with the increase of the information to be displayed and the amount of the pixels of LCD. The structure of DSP and FPGA hybrid architecture is adopted based on the analysis of the hardware architecture of Electronic Attitude and Direction Indicator (EADI) in order to satisfy the real-time requirement. The graphics processing arithmetic based on the platform is also devised and verified considering the particularity of the graphics outline generating and area filling algorithm of EADI. Special attention is payed to the data interfaces as large amount of data is transmitted. With the application of the Host Port Interface (HPI), the DSP is interfaced directly to the FPGA, which internally realized the data buffer using the on-chip Block RAM. The application proves that the processing resource of the system is utilized reasonably and efficiently，and the real-time performance of the generating and displaying of graphics is at last guaranteed.