Pcm Decoding Based On The Pci Bus Design

The controller of integrative measuring is the core of telemetrysystem on the missile which will endure many time tests during the processof the research and development of the missile, and every time it costa lot, so the high degree of accuracy and high reliability are emphasized.The subject study is the design of the universal PCM decoding card on thebase of PCI bus which is the important part of the test system to compoundcontroller of integrative measuring. It can give accurate and objectiveand efficient appreciation to the controller of integrative measuringwhich used in variant occasion. The digital synchronization extractingtechnology on code and frame signals is adopted to memory the high speedPCM data in real-time without losing any frame of data. The characteristics of the design are as follow: time to buildsynchronization is largely shorten with the new digital PCM bitsynchronizer as soon as the first level changes, the system will outputappropriate bit synchronized signal, so we enjoy less loss;we can finishdifferent model tests without changing the hardware because the decodingcircuit is integrated into a FPGA and the integrated level of the systemis enhanced;it meet the cubage request of the system with the wholehardware of system integrated on PCI card and characteristic ofconvenience to take, easy to fix are provided by this design. The main work in this subject: the function of hardware componentof system is introduced in the hardware design, especially introduced thedesign of PCM decoding card on the base of PCI interface card whichdeveloped by myself, so is the realization of digital decoding andencoding, setting the format of PCM code and stream and appending the timescale of frame decoding all by auto. In the software design, the toolsand the coherent knowledge of WDM device driver Win2000 are introduced.It put emphasis on various method and technology which used during thedeveloping the device driver of PCM decoding card. And the realizationof the function model in upper application layer is introduces at the sametime.