摘要
提出了新的ADC应用方案,即采用真正硬件同步的A/D转换器芯片AD7656来构成多通道同步数据采集电路,并且给出了与目前流行的单片机MSP430的接口程序设计方案;分析了六通道同步采样高性能A/D转换器AD7656的主要功能和接口特点,以MSP430单片机为例设计了AD7656与单片机的接口电路;经过对MSP430单片机的性能特点及接口分析,详细讨论使用硬件SPI接口和软件模拟SPI接口两种方式的程序设计,并给出相应的软件流程图;对各类同步采样电路中使用AD7656芯片及MSP430单片机提供了重要参考。
This paper put forward a new ADC application that used real hardware synchronous A/D con-verter chip AD7656 to form a multi-channel synchronous data acquisition circuit. The interface program design with current popular MSP430 MCU was given. The interface features and main function of six-chan- nels simultaneous sampling A/D converter AD7656 were analyzed. Taking MSP430 microcontroller as an example,the interface circuit of AD7656 and MSP430 microcontroller was designed. After analyzing the performance characteristic and interface of MSP430 MCU, two methods of interface program design of hard- ware SPI interface and software-emulated SPI interface were fully discussed. The corresponding software flowcharts were given. It is an important reference for various types of synchronous sampling circuit using AD7656 and MSP430 MCU.
出处
《四川兵工学报》
CAS
2014年第1期128-131,共4页
Journal of Sichuan Ordnance
基金
江苏高校优势学科建设工程一期项目资助(2011)
