本文章介绍了单片机SPI是串行外设接口基本知识，主要对数据流的同步问题从软件和硬件两方面进行了研究，并列举了实例，对单片机串口通讯的学习很有帮助-This article describes the SPI is a serial peripheral interface microcontroller basic knowledge, the main stream of data synchronization software and hardware from the two aspects were studied and cited examples of the microcontroller serial communication of learning is very help