国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

In order to provide the system accurate synchronization time and offer the high precision synchronous absolute time scale to most automation devices(such as fault wave record and data acquisition device),it can unite time benchmark for the parts in the system and also provide powerful basis with failure analysis and switch action sequence after system failure.Therefore, synchronous clock source is made based on the GPS and China's Beidou receiver double system which can receive the GPS(global positioning system) satellites and China's Beidou satellites positioning and timing information. The latest PCIE bus is designed to communicate and obtain time information with PC and synchronous clock source.This paper introduced driver programming development for the PCIE synchronous clock card based on Linux.It briefly analyses the synchronous clock card system framework and its working principle and reveals the Linux character device driver development process. Finally it achieves PCIE device driver development and implementation based on Linux operating system. The driver’s completeness and correctness are verified by experiment and can accurately read GPS receiver or Beidou system time information.