基于DSP和USB2.0高速数据传输系统的设计

Design of high-speed data transfer system based on DSP and USB 2.0

文章论述了基于DSP和USB2.0接口的高速数据传输系统的设计,详细阐述了其实现的原理和方法。系统利用CYPRESS公司的CY7C68001作为USB2.0接口芯片,实现了主机与下位机的高速数据通讯,采用CPLD,克服了DSP I/O接口功能弱的缺点,提高了DSP的控制能力,增强了系统的灵活性,同时采用TMS320LF2407 DSP作为核心芯片,完成控制与数据处理,设计DSP算法来实现USB状态寄存器的访问、USB端点的操作以及中断源的处理,最后简要讲述了USB驱动程序的编写。

This paper discusses the design of high speed data transfer system based on DSP and USB 2.0,and expatiates the principle and method of system. The system utilizes CY7C68001 chip as the USB2.0 interface, which achieves the high speed communication between the host computer and the subordinate machine. Through conducting CPLD design, the weakness of DSP I/O interface function is changed, flexibility is strengthened and the capability of DSP control is enhanced. It uses TMS320LF2407（DSP） as the core chip, which can accomplish the function of control and digital processing. The DSP software realizes the visit of registers of USB chip, operation of endpoint and read of interrupt sources. Finally the design of USB driver is briefly narrated.