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 aspec