本文提出了基于32位的RISC嵌入式处理器的流媒体携带式系统的设计及改进。该系 统以32位的嵌入式处理器Intel PXA270处理器为设计的硬件平台,以嵌入式Linux操作系统为软件平台,并且对处理器PXA270的I/O接口以及视频解码端口进行改进,使其支持PCI总线协议。本文论述了系统的硬件和软件模块的设计,以及采用FPGA设计PCI接口的过程。 关键字:流媒体,32位RISC处理器,嵌入式Linux系统,PCI接口,FPGA Abstract:A 32 bit RISC processor system for portable streaming media application is presented and designed in the paper. The portable streaming media in the system is designed of the embedded processor Intel PXA270 processor and embedded Linux operating system. Improve the I/O interface of the processor and video codec interface to support PCI bus protocol. In the paper, the hardware design,software design,and the PCI interface design are discussed in detail. Keywords:Streaming Media, 32 bit RISC Processor, Embedded system, PCI Interface, FPGA