推荐-基于MCS51的两片单片机之间的串行通信接口设计

昆明学院

20XX 届毕业（设计）

（设计）题目基于MCS51的两片单片机之间的

串行通信接口设计

子课题题目

姓名

学号

所属院系自动控制与机械工程学院

专业年级 10级通信技术专业

指导教师任杰

20XX年 5月

随着电子技术的发展，单片机的应用也越来越多及越来越重要，而串行通信理论和单片机的开发相结合使电路板的线路少，成本低了，而且在远距离传输时，避免了很多条的线路特性不同而被广泛地使用。而RS232是一种比较成熟的串口，所以本次设计使用RS232串口，用串口通信时发送和接收到的每一个字符实际上都是一次一位的传送的，每一位为1或者为0。

本次设计就是要利用单片机来完成一个系统，实现两单片机之间的串行通信。并且使用DS18B20温度传感器，由一台单片机测量温度后传到另外一台单片机上显示。串口通讯是单片机的一个重要应用，它既可以实现单片机对计算机的数据传输，同时计算机也可以对单片机进行控制。在本次设计中，我需要克服的问题有怎样把两串口与单片机连接和设置传输的格式，和怎样采集温度，怎样显示等问题，总之，在本次设计中我需要对单片机有一定的基础，同时数电和模电也需要好好温习下。对于画设计的系统电路图有很大的帮助。而且我希望通过本次设计，可以很好的学习单片机，同时喜欢上单片机的设计。其中单片机中，MCS51单片机上的通用异步接收/发送器UART，通过RXD 和TXD可与部电路进行串行异步通信，数据的发送由TXD端送出，数据的接收由RXD 端输入。

关键词:串行通信RS-232串口波特率

MCU serial munication is a important application. In munication field, there are two types of data munication mode: parallel munication and serial munication. With the development of puter network and hierarchical distributed microputer application system, the function of the munication is more and more important. munication refers to puter information transmission to the outside world, both transmission between the puter and the puter,Also includes the puter and external device, such as terminals, printers, and transmission between devices such as disk. Serial munication refers to using a data line, to transmit data a bit a ground in turn, each data holds a fixed length of time. Its just a few lines can exchange information between the systems, especially used in puter and puter, puter and remote munication between the peripherals. When using a serial port munication sending and receiving to each and every one of the characters are in fact a a delivery, each one is or is zero.

This design is to use single chip microputer to plete a system, realize the serial munication between the two MCU. And USES DS18B20 temperature sensor, temperature is measured by a single-chip puter and send to other displayed on a single chip microputer. For single chip microputer serial port munication is of great significance, not only can realize the MCU data transmission to the puter side, but also can realize the puter control of the microcontroller. Due to its less cable, wiring simple, so in the long distance transmission, has been widely used, MCS - 51 series microcontroller with a universal asynchronous receiver/transmitter UART, RXD by pin [P3. O] and TXD [P3.1] with external sound circuit B full duplex serial asynchronous munication, send data sent by the TXD end, when receiving data from the RXD input.

Keywords: serial munications RS - 232 serial port baud rate