基于DM642的PCI总线接口技术的高速数据传输研究

Research about high-speed data tromsfer based on PCI interface of DM642

针对目前数据采集系统中高速数据传输要求,采用TI公司的一款高性能数字信号处理器(Digital SignalProcessor,DSP)芯片--TMS320DM642来实现PCI(Peripheral Component Interconnect)总线的高速数据传输.首先介绍了TMS320DM642的PCI接口特性,重点介绍了主模式下的数据传输方法,并给出了相应的驱动程序以及DSP相关程序的编制手段.最后通过实验证明DM642高效的数据传输能力.

According to need of high speed data transferom in data collecting system, this paper adopts a high-powered Digital Signal Processor （DSP） of TI-DM642 to realize high speed data transfer. At first The author introduces Peripheral Component Interconnect （PCI） interface traits of DM642, emphasizes data transferring in master mode, also the means of driver programming and DSP programming are given. Finally, the efficient ability of data tromsfer is proved by experiment .