The design of PXI IF digitizer device driver based on WDM

A theoretic diagram of IF digitizer based on PXI bus is proposed in this paper. To be aimed at the hardware system, the principle of the WDM model is firstly introduced; the DriverWorks is adopted as the driver development tool to develop the corresponding WDM driver. Combining the request of the IF digitizer, several key problems are expatiated, including the method of I/O, memory mapping and accessing, the processing of interrupt as well as the Burst DMA transport method. After long time test, the IF digitizer works reliably, and the device driver can realize the high speed of transport.