SPI的通信总结：SPI详解、SPI的读写、SPI的接收、发送中断配置、SPI的DMA操作，整个SPI知识点总结，融为一体，适合开发人员学习SPI的各个特性！能让你五分钟领会ＳＰＩ各个知识！-Summary: SPI communication SPI, SPI read and write SPI, the sending and receiving interrupt configuration, SPI DMA operation, the SPI knowledge points are summarized, integrated, suitable for developers to learn the various characteristics of SPI! Can let you five minutes to understand all the knowledge of SPI!