搜索
#includereg52.h#defineucharunsignedchar#defineuintunsignedintsbitb=P0^4;sbitc=P0^3;ucharz,count;ucharString[20];//xdataucharryubCardMsg[MSR_ASIC_PREAMBLE_AND_ALL_3_TKACKS_LEN_IN_BYTES];//TrackA-76characters,7bitsperalphanumbericcharacterincludingparity.charchar7bit[64]=!'#$%&'()*+,-./0123456789:;=?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_;//´ÅµÀBÒëÂë´ÅµÀBµÄ±àÂëºÍ´ÅµÀAÏàËÆ£¬Ö»ÊDzÉÓÃÁË5λ(4λÊý¾ÝºÍ1λÆæżУÑéλ)±àÂ룬¶ø²»ÊÇ7λ±àÂë¡£//´ÅµÀBµÄ×Ö·û¼¯Ö»º¬ÓÐÊý×Ö×Ö·ûºÍ·ûºÅ£¬ÈçÏÂÃæµÄchar5bit[16]×Ö·ûÕóÁÐËùʾ¡£0123456789012345charchar5bit[16]=0123456789:;=?;//Generatealongdelayforcardresetandreadintervals.voidlongDelay(){uintj,i=5;while(i--){for(j=0;j5000;j++);}}//Generateashorterdelay(usedbetweenSTROBE/DATAtransitions).voiddelay(){uinti;for(i=1;i1000;i++){;}}//ReleasetheDATAline(P0.0)andallowittofloathigh.voiddataHigh(){P0|=0x01;delay();}//DrivetheDATAline(P0.0)low.voiddataLow(){P0&=0xFE;delay();}//ReleasetheSTROBEline(P0.1)andallowittofloathigh.voidstrobeHigh(){P0|=0x02;delay();}//DrivetheSTROBEline(P0.1)low.voidstrobeLow(){P0&=0xFD;delay();}voidresetCardReader(){dataHigh();strobeHigh();longDelay();dataLow();//ForceDATAlow.longDelay();strobeLow();//DriveSTROBElow,thenhighagain.strobeHigh();strobeLow();//DriveSTROBElow,thenreleaseDATA.dataHigh();longDelay();strobeHigh();//DriveSTROBElowandhighagaintwomoretimesstrobeLow();//tocompletetheresetandleavethecardreaderstrobeHigh();//inthereadystate,preparedtoscanacard.strobeLow();}//WaitfortheDATAlinetobedrivenlowbythecardreader.voidwaitForDataLow(){inti=0xFF;dataHigh();//MakesurethatDATAisfloatinghigh.c=1;longDelay();c=0;longDelay();c=1;longDelay();c=0;longDelay();while((i&1)==1){i=P0;}}//ClockasinglebitvalueoutofthecardreaderbydrivingSTROBEhigh,//thenlow,andreadingtheDATAline.intreadBit(){inti;strobeHigh();//DriveSTROBEhigh.strobeLow();//DriveSTROBElow(DATAlinenowcontainsbit).i=P0;if((i&1)==0){return1;//LowonDATAlineindicatesa1bit.}else{return0;//HighonDATAlineindicatesa0bit.}}//ÒëÂëA***********************************************//Clockoutanddecodea7-bitcharacterfromthetrackmemory,returningthe//charactervalue.7-bit(alphanumeric)charactersarefoundonTrackAonly.charread7BitChar(){inti,c;//Eachcharacteriscomposedof7bits,whichweclockoutofthetrackmemory//beginningwiththeleastsignificantbit.Bit7isparity,whichisignored.c=0;for(i=1;i128;i*=2){c|=(readBit()*i);}c&=0x3F;returnchar7bit[c];//Decode/returnthecharacterusingthe7-bittable.}//Clockoutanddecodea5-bitcharacterfromthetrackmemory,returningthe//charactervalue.5-bit(numeric+symbol)charactersarefoundonTracksBandC.charread5BitChar(){inti,c;//Eachcharacteriscomposedof5bits,whichweclockoutofthetrackmemory//beginningwiththeleastsignificantbit.Bit5isparity,whichisignored.c=0;for(i=1;i32;i*=2){c|=(readBit()*i);}c&=0x0F;returnchar5bit[c];//Decode/returnthecharacterusingthe5-bittable.}voidUART_init(){TL1=(65536-50000)%256;//µÃµ½¶¨Ê±Æ÷¼Ä´æÆ÷µÍλTH1=(65536-50000)/256;//µÃµ½¶¨Ê±Æ÷¼Ä´æÆ÷¸ßλ//³õʼ»¯´®ÐпںͲ¨ÌØÂÊ·¢ÉúÆ÷SCON=0x50;//Ñ¡Ôñ´®¿Ú¹¤×÷·½Ê½1£¬´ò¿ª½ÓÊÕÔÊÐíTMOD=0x20;//¶¨Ê±Æ÷1¹¤×÷ÔÚ·½Ê½2£¬¶¨Ê±Æ÷0¹¤×÷ÔÚ·½Ê½1TH1=0xfA;//ʵÏÖ²¨ÌØÂÊ9600£¨ÏµÍ³Ê±ÖÓ11.0592MHZ£©PCON=0x80;TR1=1;//Æô¶¯¶¨Ê±Æ÷T1ET1=1;ES=1;//ÔÊÐí´®ÐпÚÖжÏPS=1;//Éè¼Æ´®ÐпÚÖжÏÓÅÏȼ¶EA=1;//µ¥Æ¬»úÖжÏÔÊÐí}//*****************************************************//**************´®¿Ú·¢ËÍ×Ö·ûº¯Êý*************ucharSendOneByte(ucharunchByte){SBUF=unchByte;while(!TI){}TI=0;}//*****************************************************//**************´®¿Ú·¢ËÍ×Ö·û´®º¯Êý*************ucharUartPrint(ucharlen,uchar*string){for(;len0;len--)SendOneByte(*string++);SendOneByte(0x0d);}//*****************************************************voidmain(){uinti;P0=0X00;UART_init();while(1){resetCardReader();UartPrint(24,Waitingforcardswipe:);waitForDataLow();//DATAlowindicatesthatcardswipehasbegun.b=1;longDelay();b=0;longDelay();b=1;longDelay();b=0;longDelay();strobeHigh();longDelay();strobeLow();longDelay();waitForDataLow();//DATAlowindicatesthatcardswipeiscomplete.UartPrint(14,Track1Data=);//if(readBit()&0x01==1){for(i=0;i16;i++){readBit();}for(i=0;i76;i++){SendOneByte(read7BitChar());}//Atthispoint,wehaveread532bitsofthe704-bitTrackAmemoryonthe//cardreaderIC.Flushtheremaining172bits.for(i=0;i172;i++){readBit();}//TrackB-37characters,5bitspernumeric/symbolcharacterincludingparity.UartPrint(14,Track2Data=);for(i=0;i37;i++){SendOneByte(read5BitChar());}for(i=0;i519;i++){//¶ÁȡʣϵÄλ±àÂëµÄÊý¾Ý[704-£¨37*5£©]=519bitsreadBit();}UartPrint(14,Track3Data=);for(i=0;i104;i++){SendOneByte(read5BitChar());}for(i=0;i184;i++){//¶ÁȡʣϵÄλ±àÂëµÄÊý¾Ý[704-£¨104*5£©]=184bitsreadBit();}}}}/*voidtimer0()interrupt1{//¶¨Ê±50ms£¬ÒªÖªµÀ51µ¥Æ¬»ú×ֻÄܶ¨Ê±65.536msTL0=(65536-50000)%256;//µÃµ½¶¨Ê±Æ÷¼Ä´æÆ÷µÍλTH0=(65536-50000)/256;//µÃµ½¶¨Ê±Æ÷¼Ä´æÆ÷¸ßλcount++;if(count==2)//Á½´Î¼´100ms{count=0;MSR_ub100msTickDownCntTimeToReceiveBufferReadySignal--;}}*///º¯Êý´®¿Ú½ÓÊÕÖжϴ¦Àíº¯Êývoidcom_interrupt(void)interrupt4using3{unsignedcharRECEIVR_buffer;bitflag1=1;if(RI)//´¦Àí½ÓÊÕÖжϲéѯ½ÓÊÕ±ê־루ÓÐÊý¾Ý·¢Ë͹ýÀ´Ê±ÖÃΪ1£©{RI=0;//Çå³ýÖжϱ