利用DSP技术实现测量仪器扩展USB接口

Extend USB interface for measure instrument based on DSP

系统选用专用的USB接口芯片,采用高性能的DSP芯片作为USB接口的控制器,实现了测量仪器扩展USB接口的目的。本文设计了DSP与USB接口芯片(PDIUSBD12)的连接关系,给出了USB通信关键软件设计思路。通过调试,数据传输平均速率达到130Kb/s,可满足一般的测量仪器高速数据传输;另外接口设计方案具有良好的可移植性,为测量仪器USB接口的扩展提供了一种高性价比、高适用性的实现方案。

In this paper, the system selects the special USB interface chip, applying for a high-performance DSP chips as a USB interface controller in order to realize the measuring equipment to expand the purpose of USB interface. It designs a DSP and USB interface chip （PDIUSBD12） connectivity, gives out the key thought to software design of USB Communication. Through debugging, data transmission rate reaches an average of 130 Kb / s to meet the general instruments high-speed data transmission. In addition,the interface design scheme has good portability, and provides the realization project of a high performance-toprice ratio and the high applicability for the expansion of USB interface of measuring equipment.