外文翻译--关于pc机与单片机串行通信设计的实现(编辑修改稿)

外文翻译--关于pc机与单片机串行通信设计的实现(编辑修改稿)内容摘要：

tart and stop bits, but put them together to send together. We call these bined data frames, or frames for short. This design topic research between systems, data transmission and control system and peripherals. Serial port in system and ACTS as a connection between peripheral tasks and in serial munications with RS485 and RS232 serial interface 4 technology most widely used, this topic mainly studies design of RS485 serial port, and in order to meet the RS485 munication standard MAXIM pany has designed a model named MAX488 for this chip, the chip connotation is a drive and a receiver, with low power consumption at the same time, single + 5 v power supply, the drive has overload protection, without external ponents, etc. AT89C2051 MCU when executing mands to failure, can through the chip IMP813 microcontroller reset. It can also be awaken singlechip puter from sleep mode or idle mode. In the present AT89 series singlechip microputer serial port munication technology in the current popular solution is to adopt RS485 interface. It takes one and two bus interface, USES a half duplex munication bus difference level of data transmission. Microputer to realize RS485 protocol munication generally summarized two methods can be used: the first USES the munication card, inserted on puter motherboard expansion slot。 The second USES RS232 and RS485 conversion interface device. System USES AT89C51 as a machine and PC as upper machine, both through the RS 232 serial port to send and receive data. RS 232 signal level and single chip microputer serial signal level, must be between the two level transformation, system used in the integration level conversion chip MAX232 implementing RS 232 / TTL level transformation. This design using the single chip microputer principle and microputer interface technology and so on knowledge of single chip microputer and PC serial munication design. There are involved during description, serial munication system of serial munication principle, the electric standard of RS 232 interface, level conversion method and the single chip microputer minimum system design related issues. This system consists of hardware and softwareThis system consists of two parts of hardware and software coordination is plete, the hardware part mainly plete information display。 Software mainly plete signal processing and control function, etc. System hardware design adopts modular design, AT89C51 singlechip microputer as the core, the serial port munication circuit of control system. Software design using a query and receive interrupt way to plete 5 data, and further processing. During implementation behind also adopted, for example, and the simulation debugging, namely using Protues platform, virtual serial port software to create virtual COM port, a pair of interlinked MSC0mm software based serial debugging software tools such as PC and single chip puter serial munication system simulation. Involving the baud rate in the title, baud rate the data transfer rate, said every second transmission of binary digits, it is the unit of g bit/SEC (b/s), monly used BPS said. Baud rate is an important indicator of asynchronous munication, characterization data transmission speed, the higher the baud rate, the faster the speed。