SPI总线从机接口实时模拟的实现

The implementation of SPI bus slave computer interface real time simulation

MCS51系列单片机由于不带SPI串行总线接口而限制了其在SPI总线接口器件的使用。文章介绍了SPI串行总线的特征和时序,并以双CPU通信为例,给出了在51系列单片机上利用中断实现SPI串行总线通信的方法和软件设计程序,从机在实现SPI接口同时还可以完成其他操作任务。

Due to no SPI serial bus interface in. MCS51 Scm, MCS51 scm couldn＇t use SPI bus interface apparatuses. The paper firstly introduced the characteristic and Sequence of SPI serial bus. Take double CPU communication as example, the paper implemented SPI serial bus interface communication making use of interrupt on MCS51 scm. Then the paper showed the method and software design program. The slave computer could implement SPI interface and other operation tasks.