高速DSP扩展低速接口的实现方法

Application Method of High Speed DSP and Low Speed CPU

根据电视监控系统开发项目中存在的高速 DSP器件与低速器件接口的时序不匹配问题 ,提出了采用高速 DSP的 SPI口串行通讯和 GPIO并行通讯 ,解决高速 DSP与单片机及 PC机之间的接口问题 ,并给出了通过这种方法扩展键盘和 L ED显示器的例子和扩展

This paper suggests that using the SPI series communication ports and GPIO parallel communication ports of a fast speed DSP chip can be taken to solve the synchronization of time between the high speed DSP and low speed CPU. An example of the applications on the keyboard and LED displayers with these methods has been given in the paper. These methods also can be applied to the other series of DSP chips.