The research and implementation of PCI express driver for DSP based on KeyStone architecture

As a third-generation universal I/O interconnect technology succeeding ISA and PCI bus, PCI Express has characteristics of lower pin count, higher reliability and faster transfer rate, which makes it a promising prospect. This paper studies PCI Express interface technology of DSP based on KeyStone architecture, and proposes a driver design method aimed at PCI Express interconnection between DSP and host PC. The method not only improves the data transfer rate but also reduces the difficulty of driver development, which effectively solves problem of high-speed communication. The proposed method which is verified on multi-core DSP-TMS320C6678 chip based on KeyStone architecture, obtains either read or write speed of more than 160MB/s both in Linux and Windows operating system, nearly up to 80% of theoretical bandwidth. Experimental results demonstrate that the method proposed above can effectively implement PCI Express driver development for DSP based on KeyStone architecture.