基于PC/104总线与CPLD的SPI接口设计

Design of SPI Interface Based on PC104 Bus and CPLD

本文根据SPI同步串行接口的通信协议,介绍了在CPLD中利用VHDL语言实现PC/104总线扩展SPI接口的设计原理和编程思想。通过该方法的介绍,使得那些没有SPI接口功能的处理器和控制器能够扩展SPI接口,以便同外部设备进行数据交换。并给出了VHDL语言的源代码程序。

This paper based on communication protocol of SPI synchronous serial interface, presents the design theory and programming idea of implementing PC/104 bus expand SPI interface with VHDL language in CPLD device. This interface can be used to data exchange with peripheral apparatus for processor and controller which have not SPI interface function. Moreover presents VHDL source codes .