外文翻譯中英對(duì)照--基于rs-232的串行通信(存儲(chǔ)版)
【正文】 和速度。RS232是在PC機(jī)中和通信行業(yè)中應(yīng)用最廣泛的串行接口。RS232是一個(gè)基本現(xiàn)代化的計(jì)算機(jī)接口，它包括COM1和COM2端口，該端口COM1有9針連接器。A串口中斷子程序用于接收數(shù)據(jù)對(duì)用于接收數(shù)據(jù)的串行端口的中斷子程序主要是由PC接收和發(fā)送的數(shù)據(jù)存儲(chǔ)到分配的內(nèi)存中的數(shù)據(jù)（不與數(shù)據(jù)處理，以減少由中斷注冊(cè)的時(shí)間）負(fù)責(zé)。經(jīng)過(guò)單片機(jī)接收數(shù)據(jù)，并調(diào)用串口中斷子程序，其中第一次發(fā)送的數(shù)據(jù)被處理。4． PC和單片機(jī)通信程序的設(shè)計(jì) 為了方便地實(shí)現(xiàn)系統(tǒng)軟件移植和統(tǒng)一，上位機(jī)程序的設(shè)計(jì)使用作為控制系統(tǒng)編程工具博蘭的C++。微機(jī)具有兩個(gè)串口，一般稱為COM1和COM2，以便程序可以自動(dòng)識(shí)別串行端口，利于端口可以成功的發(fā)送和接收數(shù)據(jù)和指令。數(shù)據(jù)的通信采用累加和校驗(yàn)的方法，即每傳送一組數(shù)據(jù)（個(gè)數(shù)自定，設(shè)為100個(gè)），校驗(yàn)一次累加和是否正確，正確則回送00H，否則回送FFH。參考文獻(xiàn)【1】樊一支，姜文祥，陳梨園。18（4）：220223頁(yè)【5】黎步銀，江盛林，盧重，周東祥。its disadvantage is that transmission speed is low.Serial munication with asynchronous munication and synchronous munication are two basic means of munication for the case of high transmission speed,the hardware asynchronous munication used in transmission speed between 50 and 19200 is relatively asynchronous munication,data is transmitted frame by frame,each frame of serial data format by a start bit,5 to 8 data bits,a parity bit(optional) and a Stop bit of four the serial munication,the sender and receiver to agree the specific data format and baud rate(munication protocol).PCprogrammable serial asynchronous munication controller 8250 to implement asynchronous serial 8250 the initial programming,you can control serial data transmission format and the PC,in general there are two standard RS232C serial interface COM1 and COM21MCS51 serial microcontroller chip includes a fullduple serial interface,can also be realized by programming the serial munications. CMOS smart sensor IC has received wide application for low cost,miniaturization,intelligence and smart sensor IC designs,the munication interface circuits also play an important role other than sensors and signal processing are more serial munication standard interfaces,such as RS232,RS485,USB Interface,IEEE1394,which has itself good features and also has focused on areas of has a antinoise capacity transmitting data,so it is monly used in industrial interface and IEEE1394 have fast speed,but some puters and operating systems do not support such standard is a protocol of asynchronous serial munication and has been widely used in PC and munication short distance municational peripherals of PC such as printers,disks and terminals all municate with PC via RS232 serial interface. RS32C standard RS232C is the American Electronics Industry Association(EIA) formally announced,in the asynchronous serial munication,the most widely used standard standard for DCE and DTE serial binary munication between the maximum data transfer rate of up to ,the longest transmission cables up to 15 meters RS232C standard defines the 25lead,twoway munication in general,just Serial input RXD,serial output TXD and ground GND1RS232C standard levels using negative logic,the provisions of +3V~+15V at any level between a logic ”1” level,with TTL and CMOS levels are the interface circuit and puter interface chip in the mostly level TTL or CMOS,so the munication,the need for level conversion,so with RS232C standard level matching 1MAX232 chip level conversion can be done in this work. RS232 is defined as the singleended standards,which has much characteristic,such as more munication distance in a lowspeed serial munication,moderate price and good practically of the system,so it is most appropriate to be a munication is an essential modern puter interfac
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