Research On Image Acquisition System Based On PCI Bus

The PCI bus has become the most popular computer local bus with such advantages as high performance, low cost, openness, processor independence, etc. In real-time video signal acquisition, transmission and storage, we need to deal with large quantities of digital data at high speed. For this purpose, the thesis developed a video signal acquisition system based on PCI bus, the hardware and software design of which were presented in detail.In hardware design, a SAA7114 chip was used for video signal decoding and A/D converting. A CPLD chip EPM7128S was employed for the generation of the address and write signal to store the digitized video data into high speed RAM IS61LV5128AL. For PCI interface, a PCI9052 chip was used to achieve high speed data transmission between computer and the video signal acquisition system.In software design, the initialization of SAA7114 was performed via I~2C bus. The CPLD logic was realized using VHDL under MAX+plus II environment. The device driver for PCI9052 was developed using WinDriver. And the application program was composed using Visual C++6.0 language.With hardware and software above, pictures with good quality have been obtained, indicating the correctness of the design of the whole system.