新型自动气象站4路高速串口的设计与实现  

Design and implementation of 4 channel high speed RS232 about the new automatic meteorological station

作　　者：吕雪芹[1] 敖振浪[1] 

机构地区：[1]广东省大气探测技术中心,广州510080

出　　处：《电子测量技术》2014年第5期121-123,126,共4页Electronic Measurement Technology

基　　金：财政部;科技部公益性行业(气象)科研专项项目资助;项目名称:"自动地面站和探空系统现场试验考核评估系统观测误差订正方法研究"

摘　　要：本文介绍了新型自动气象站的串口扩展方法和技巧,以STM32F2系列单片机为核心构建嵌入式系统,仅仅使用单片机两根IO线模拟I2 C总线协议,利用VK3344芯片扩展出4个RS232串口,采用外部中断方式发送接收,实现了同时4路串口速率为38400bps,每路全双工同时收发。实践证明,此方法扩展串口非常节省单片机硬件资源,设置灵活,效率高,成本低,性能稳定可靠。This paper introduces serial port extension methods and skill of the new automatic meteorological station.Using STM32F2 series single chip microcomputer as the core to build an embedded system,using only two lines of IO to simulate I2C bus protocol,using VK3344 chip to extend four RS232 serial ports,using external interrupt way to send and receive,implements 4-way serial port with 38400 BPS,each full-duplex transmit and receive at the same time.Practice has proved that the extension port very Save the microcontroller hardware resources,and it has advantages with configuration flexibility,high efficiency,reliable performance.

关 键 词：自动气象站 VK3344 多串口扩展 中断发送接收 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]