摘要
针对电子产品设计中主控制器核心硬件串口资源缺乏的问题,提出了一种基于WK2124构建SPI接口四通道异步串口扩展器的设计方案,利用主控制器的硬件4线SPI资源或常规的4个I/O引脚即可得到4路增强型异步串口,该方案相较于常规的软件模拟串口时序或线路分时复用等方法更具实用性,扩展的子串口具备片上FIFO收发缓存单元,数据帧格式和波特率可单独调整,适用于串口服务器、无线DTU设备、车载设备、抄表系统和嵌入式系统中需要串口扩展的应用场景。
In response to the lack of core hardware serial port resources in design of electronic products,this paper proposes a design scheme based on WK2124 to construct a four channel asynchronous serial port expander for SPI interface.By utilizing the hardware 4-wire SPI resources or conventional 4 I/O pins of the main controller,four enhanced asynchronous serial ports can be obtained.This scheme is more practical than conventional software simulation serial port timing or line time-sharing multiplexing methods.The extended sub serial port has an on chip FIFO receiving and sending cache unit,and data frame format and baud rate can be adjusted separately.It is suitable for application scenarios that require serial port extension in serial port servers,wireless DTU devices,onboard devices,meter reading systems,and embedded systems.
出处
《工业控制计算机》
2023年第11期37-38,41,共3页
Industrial Control Computer
基金
2022年教育部产学合作协同育人项目(220503580121139)
2021年海南省高等学校教育教学改革研究项目(Hnjg2021-84)
海南热带海洋学院崖州湾创新研究院重大科技计划项目(2022CXYZD003-01)的研究成果。
