基于MPC860的数据采集接口的设计与实现

MPC860是一款功能强大的嵌入式通信处理器,但由于缺乏集成数据采集外设,限制了其在控制领域的应用,因此,提出了一种基于AD7862结合CPLD控制的数据采集接口实现方法;利用AD7862的双采样保持功能完成双通道同时采样,用多路开关扩展采样通道数,CPLD完成对采样通道选择、采样频率的设定、采样结果读取/存储以及数字I/O扩展功能;CPLD与MPC860之间通过数据地址总线连接,并由MPC860的GPCM控制器对CPLD进行总线时序控制;给出了详细的软硬件设计,经实际应用测试满足了系统的信息采集需求,实现了接口扩展目的.

Design and Realization of Data Collection Interface Based on MPC860

MPC860 is a powerful embedded processor in communication domain.It is limited in using in control domain because of its absence of data collection peripheral.A CPLD control data collection interface based on AD7862 is designed to solve this problem.The interface can collect two channels analog signal by using AD7862's double sample holder,and extend collection channels by using analog multiplexer.As the interface control center,CPLD finish the tasks which include that collection channel select,collection sp...