【摘要】 该文介绍了一种通过SPI总线在外围集成单片机,利用单片机对嵌入式系统进行功能扩展的方法。描述了扩展方案的体系结构和工作原理,详细阐述了linux环境下外围设备驱动程序的体系结构和运行机制。并且以Au 1200 soc为例介绍了利用SPI接口和外围单片机对嵌入式系统进行功能扩展的实现过程。更多还原

【Abstract】 The paper describes an expansion method for embedded system by integrating external MCU through SPI.This paper introduces the hardware architecture and the operating principle,and focuses on the architecture and the operating principle of the device driver for expanded devices under Linux. By taking an example,the paper introduces the realization of expansion for Au1200 SOC with SPI interface and external MCU.更多还原