外文翻译RS串行通讯课稿.doc

外文翻译 系 别 信息工程系 专 业 班 级 学 号 姓 名 指导教师 负责教师 沈阳航空学2015年月The Designing of Serial CommunicationBase on RS232 Abstract-This Paper discussed the principle of serial communication mainly,proposed the design method based on RS232,designed the hard circuit of serial communication,and realized the programming to PC Microcomputer and single chip microcomputer by using assembly language and C++ Builder separately Keywords-serial communication;single chip microcomputer;program design I.INTRODUCTION During working in the control system,the PC microcomputer sends instructions for step-by-step motor to collect the image information.Therefore the communication between the PC microcomputer and the driving system is needed for the communication system.In general,a complete communication system consists of transmitter,receiver,converting the data interface and transmitting data channel.The control of tne step-by step motor is realized through the pulse distribution by single chip microcomputer.On the motor control system,the PC microcomputer is called as upper computer,and the single chip microcomputer for driving step_by_step motor is called as lower computer.The communication between the upper computer and the lower computer has two methods,that si to say the parallel interface can transmit much data at the same time and has the fast speed,but when the transmission distance is far and the number of data is much,it needs more the number of transmission lines.In addition,the voltage level may be changed by the transmission line factor and electromagnetic interference.Serial communication is utilized in the control system so as to simplify the hardware and save the cost.. II. THE BRIEF DESCRIPTION OF SERIAL PORT COMMUNITION Serial communication is the communication between sender and receiver data line,to move each time a bit.The advantage is that only a pair of transmission lines to send information,so its low cost,suitable for long-distance commu