基于SPI总线的高速串行数据采集系统设计

针对目前嵌入式数据采集系统对数据采集的精度、速度的要求越来越高,同时又要求接口电路简单、传输可靠性好,本文介绍了基于高速高精度ADC芯片AD7674与DSP芯片TMS320F2812组成的嵌入式数据采集系统.通过SPI总线,可将AD7674与TMS320F2812直接相连,方便地实现了高速串行数据的传输,并给出了SPI的接口电路及软件设计.实验结果表明,采用基于SPI总线的嵌入式数据采集系统硬件结构简单、传输速率高、可靠性好.

Design of high-speed serial data acquisition system based on SPI bus

In consideration of the higher and higher requirement of data acquisition precision and speed on the embedded data acquisition system recently,at the same time,the simple interface circuit and high reliability is also required,this paper has presented an embedded data acquisition system composed of high-speed and high-precision ADC chip AD7674 and DSP chip TMS320F2812. The AD7674 and TMS320F2812 can be connected directly through SPI bus,and conven- iently realize high-speed serial data transmission. The interface circuit and software design of SPI was also offered in this paper. The test results indicate that the embedded data acquisition based on SPI bus has the characteristics of simple hardware architecture,high-speed data transmission and high reliability.