基于51单片机的英文论文 单片机相关英文文献500.docx

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1、基于51单片机的英文论文 单片机相关英文文献500theReal-TimeClockBasedonAT89S51Author:Class:;Name:Keywords:AT89S51;clock;digitaltube;keyboardswitch;functionCanrealizethefollowingfunctions:1.Usethekeyboardswitch,showrespectivelytheseconds,minutes,hour,day,month,year;2.Usethekeyboardpresetyear,month,day,time,minutesandsecon

2、ds;3.Canthecountdown,thecountdownunitsforminutes;4.Everysecond,thefourdecimalpointshineonce;5.Timingalarmclockfunction,abuzzercallreminder.6.Theclockerrordailyisnotmorethan1second.Methods:AT89S51hasthefollowingstandardfunctions:8kbytesFlash,256bytesRAM,and32-bitI/Olines,awatchdogtimer,twodatapointer

3、,three16timer/counter,a2.ThedisplayDisplayusesthemethodofdynamicLEDdigitaltubetodisplay,P0portoutputcharacterscodetodisplay,positioncodesarecontrolledbyP2.4P2.7.Thecostofthedynamicdisplayisverylow,butthedynamicdisplayoccupiesmoreresourcesoftheCPUinterface.Thedesignuses12lines.Inadditionbythedynamicd

4、isplayrefreshing,whichtakespartoftheworktimeoftheCPU.Soforsomehigherdemandcontrolsystem,weshouldconsiderthetimetakenbythedisplay.3.ThekeyboardKeyboarduses4*4matrixkeyboard,byP2.0P2.3forrowline,P1.4P1.7forcolumnline,phalanxesof4*4aremade,andusingthemethodofscanningsoftwarecandeterminethekeyvalueofeac

5、hkey.Inthedesign,eachkeycanbeusedtoinput4.Thepowersupply5.Programminginterface2.Afterconnectingthepowercordandprogrammingline,startUSBASPprogrammingsoftware.SelectthechipmicroprocessorsmodelintheselectionofAT89S51.Openandloadintheflash.Loadinthehexintosystemfiles.UseeraseResults:Key:|1|2|3|分秒|4|5|6|

6、时分|7|8|9|月日|确定|0|倒计时|年|#include#include#defineucharunsignedcharsbitP1_3=P13;sbitP3_2=P32;unsignedchart=0;unsignedchart1=50;unsignedchart2=59;unsignedchart3=23;unsignedchart4=7;unsignedchart5=60;unsignedchart6=60;unsignedchark1=4;uchari;ucharc;uchara10=0x81,0xED,0x43,0x49,0x2D,0x19,0x11,0xCD,0x01,0x0

7、9;ucharp5;voiddelay(intMS)inti,j;for(i=0;ifor(j=0;jucharencoder(ucharnum)uchari;switch(num)case0x11:i=0x11;peak;case0x12:i=0x12;peak;case0x14:i=0x13;peak;case0x18:i=0x14;peak;case0x21:i=0x15;peak;case0x22:i=0x09;peak;case0x24:i=0x06;peak;case0x28:i=0x03;peak;case0x41:i=0x00;peak;case0x42:i=0x08;peak

8、;case0x44:i=0x05;peak;case0x48:i=0x02;peak;case0x81:i=0x16;peak;case0x82:i=0x07;peak;case0x84:i=0x04;peak;case0x88:i=0x01;peak;return(i);ucharkey_value()uchartem,s,t,n;P1&=0x0f;P2|=0x0f;tem=P2;tem|=0xf0;s=tem;P2&=0xf0;P1|=0xf0;tem=P1;tem|=0x0f;t=tem;s=s+t;n=encoder(s);return(n);ucharkey(void)uchari;

9、P2|=0x0f;P1&=0x0f;i=P2;i|=0xf0;i=i;return(i);voidshow1(uchari,ucharj)P0=aj;P2=P2&0x0f;P2|=1voidshow(uchari,ucharj,uchark,ucharl)uchara10=0x81,0xED,0x43,0x49,0x2D,0x19,0x11,0xCD,0x01,0x09;ucharb,c,d,e;b=ai;c=aj;d=ak;e=al;P2&=0x0f;P2=0x1f;P0=b;delay(1);P2&=0x0f;P2=0x2f;P0=c;delay(1);P2=0x4f;P0=d;delay

10、(1);P2=0x8f;P0=e;delay(1);voidyear(void)while(key()=0)show1(4,2);delay(1);show1(3,0);delay(1);show1(2,1);delay(1);show1(1,3);delay(1);voidmonthday(void)TMOD=0X01;TH0=0x4c;TR0=1;IE=0X82;TMOD=0x01;while(key()=0)show1(4,0);delay(1);show1(3,1);delay(1);show1(2,0);delay(1);show1(1,t4%10);delay(1);voidhou

11、rminute(void)TMOD=0X01;TH0=0x4c;TL0=0x00;TR0=1;IE=0X82;TMOD=0x01;while(key()=0)show1(4,t3/10);delay(1);show1(3,t3%10);delay(1);show1(2,t2/10);delay(1);show1(1,t2%10);delay(1);voidminutesecond()TMOD=0X01;TH0=0x4c;TL0=0x00;TR0=1;IE=0X82;while(key()=0)show1(4,t2/10);delay(1);show1(3,t2%10);delay(1);sho

12、w1(2,t1/10);delay(1);show1(1,t1%10);delay(1);voidjishi(void)TMOD=0X01;TH0=0x4c;TL0=0x00;TR0=1;IE=0X82;TMOD=0x01;while(key()=0)show1(2,t5/10);delay(1);show1(1,t5%10);delay(1);voidshuru(void)-k1;if(k1=0)k1=4;while(key()=0)pk1=c;show1(4,c);delay(1);voidsure(void)while(key()=0)show(p1,p2,p3,p4);delay(1);voidtimer0(void)interrupt1t+;if(t=20)t=0;t1+;t5-;if(t5=0)while(key()=0)show1(2,0);delay(1);show1(1,0);delay(1);P3_2=P3_2;delay(1);P1_3=P1_3;delay(1);t6-;if(t6=0)if(t1=60)t1=0;t2+;if(t2=60)t2=0;t3+;if(t3=24)t3=1;t4+;if(t4=30)t4=1;TH0=0x4c;TL0=0x00;voidmain()while(1)i=key();while(i!=0)