pciaccess库源码，可编译生成libpciaccess动态库。PCI总线的地址总线与数据总线是分时复用的，支持即插即用 （plug and play）、中断共享等功能。分时复用的好处是一方面可以节省接插件的引脚数，另一方面便于实现突发数据传输。-pciaccess library source code, can be compiled to generate libpciaccess dynamic library. The address bus and data bus of the PCI bus is time-multiplexed with a support plug and play (plug-and-play), the interrupt sharing functions. The benefits of time division multiplexing is the one hand can save on the number of pins of the connector, the other hand, facilitate the realization of the burst data transfer.