Research And Design Of WDM Driver For Three-channel Data Acquisition Card Based On PCI Bus

This paper derives from a project requirement of a aircraft TT&C(Tracking, telemetry and Command) system, and the research purpose of this paper is to develop a suit of three-channel data acquired equipment, which can collect multipath high-speed synchronization data generated by many kinds of TT&C data chains to computer by PCI bus in real time.First of all, the system structure of PCI(Peripheral Component Interconnect) and WDM(Windows Driver Model) are discussed, And the mechanism of windows XP operation system and WDM Drivers are deeply studied. And on that basis, the Derivers of the three-channel data acquired card based on PCI bus is researched and designed. Then the frame and machanism of the WDM Derivers are further analyzed. The development process of Drivers is discussed in detail, such as initialization of the Drivers, Plug and Play handling, IRP handling, interrupt response, DMA transmission, DPC delay call, the communication interface with application. In the end, in allusion to the operating feature of the three-channel data acquired card, the debug, installation and test method of the device Derives are provided.At present, the three-channel data acquired card and its Drivers have been successfully applied to many aircraft TT&C systems. The practice proves this system has good functional specification, performance and stabilization. It can meet the demands of many projects.