在嵌入式系统应用中,在单个模块中存在多个MCU的条件下,提出MCU之间进行数据通信和交换的一般方法,并提出一种MCU之间为短距离的应用前提下通过在MCU两端划分发送缓存和接收缓存,并使用DMA和SPI相互配合进行高速、无需软件干预的数据传输方法,以满足频繁获取对方数据的应用需求。

In the paper,the general method of data communication and exchange between MCUs is proposed in embedded system application under the condition that there are multiple MCUs in a single module,and puts forward a method of dividing the sending cache and the receiving cache at both ends of MCU under the premise of short distance between MCUs.DMA and SPI cooperate with each other to carry out high-speed data transmission methods without software intervention,in order to meet the need for frequent access to each other's data applications.