Pci Bus-based Data Acquisition And Storage Systems

In actual radar systems, in order to test and verify radar signal processing algorithms, it is usually necessary to sample and storage data with high-speed and high-capacity at the scene. With the properties of high-performance, low-cost and good software compatibility, PCI bus has been widely used in computer system structures. This paper discusses the design and implementation method of a high-speed data acquisition and storage system based on 64-bit PCI bus and PCI Express.This data acquisition system comprises of two parts: one is the data storage card based on PCI bus; the other is the twin-channel, 12-bit data acquisition card. This paper discusses the criterion of the PCI bus and the ways to implement the interface circuit, and then chooses the 64-bit PCI bus I/O accelerator PCI9656 for the implementation of the interface control to the PCI bus. The systemic designs of the data storage card based on the PCI bus and the dual-channel, 12-bit data acquisition card are shown respectively. Its main function modules and their realizations are analyzed in detail. The development processes of the system-driven for the PCI bus device based on WinDriver development tools are dissertated. In this paper the development of the application programs using MFC and its software and hardware debugging are completed. According to the sampling parameters set flexibly by users for specific requirements, this data acquisition system can be used to sample the radar video signal and store the data sampled into a computer completely and reliably, realizing the double-channel, 12-bit data acquisition and storage with the sample frequency 56MHz.As the improvement of the PCI bus, the PCI Express bus has a wider bandwidth. On the basis of the study of data acquisition system based on 64-bit PCI bus, the development of data storage card based on PCI Express bus is further discussed. With the ML507 development card as the hardware environment, the DMA transmission and its system-driven and application programs based on PCI Express are realized.