基于ADSP2181的高速通用USB通讯接口系统

复杂的U SB协议使U SB设备的开发变得较为困难,单片机的结构和其处理数据的速度使单片机成为高速U SB设备与计算机通讯的瓶颈。为解决这些问题,文章提出了用ADSP 2181、PD IU SBD 12和双端口RAM组成的高速、通用U SB接口系统的原理和编程方法,为基于U SB通讯口的设备开发,提供了一种高速、通用和统一的数据通讯解决方案(如A/D、D/A);采用上述方法,U SB设备的设计者只要专注于硬件的设计就可以了,无需考虑复杂的U SB协议和通讯速度受限问题,该方案已经成功用于振动信号采集板的设计。

A high speed and general USB interface based on ADSP2181

The complex USB protocol makes development of USB devices very difficult,and the structure and data processing speed of single-chip computers have become a bottleneck of data exchange between a high speed USB device and a computer.To solve the problems above,a framework of a high and general USB interface constructed by ADSP2181,PDIUSBD12 and a dual port RAM as well as the programming method is described,which provides a general data transfer method for USB devices,for example,A/D and D/A devices.With the suggested solution,designers of USB devices can focus on hardware design and need not consider problems related to the complex USB protocol and the bottleneck of data exchange.The hardware for sampling vibration signals is designed successfully with the method above.