课程目标项目开发——IC卡公交收费系统项目设计之三——软件设计MIFARE1卡的读写操作步骤#include<string.h>#include<intrins.h>#include<stdio.h>#include<MFA.h>#include<mfreg632.h>#include<PcdUtils.h>#include<PcdShare.h>#include<MfErrNo.h>#include<TG12864.h>#include<MAIN.h>#defineucharunsignedchar#defineuintunsignedint#defineulongunsignedlongmain(void){ucharblockdata[16];块数据ucharTagType[2];卡类型号TagTypeucharSN[4];卡序列号SNucharsak1;卡容量字节Sizeucharcmd=1;uchari=0;ucharStatus;rc500_init();//RC500INITM500PcdConfig();//configmifareinit();//SYSTEMINITInitLCD()while(1){Status=M500PiccRequest(PICC_REQSTD,&TagType[2]);寻卡，卡应答TagTypeif(Status==MI_OK){Status=M500PiccAnticoll(0,&SN);防冲突，卡应答SN}if(Status==MI_OK){memcpy(card_snr,&SN,4);//storeserialnumberingloblevar}if(Status==MI_OK){Status=M500PiccSelect(&SN,&sak1);选择应用，卡应答Size}if(Status==MI_OK){Status=M500PiccAuthE2(PICC_AUTHENT1A,card_snr,0,3);密码认证}if(Status==MI_OK){Status=M500PiccRead(3,blockdata);读块（读余额）blockdata[5]=blockdata[5]-0x05;修改块数据}if(Status==MI_OK){Status=M500PiccWrite(4,blockdata);写块（扣款）}if(Status==MI_OK){Status=M500PiccHalt();暂停，与REQUESTSTD组合使用，防止重复操作}}}AnswertoRequest（请求应答）操作Witha“requeststd”instructiononlycardswhicharenotsetintoa“HALT-mode”willrespondtothisrequest,oritmaybeexpandedtoallcardsinthefieldwitha“requestall”option.ThefirstoptionisneededtopreventtheMCMfromselectingonecardseveraltimes.初始化与防冲突（AntiCollion）AntiCollision防冲突MIFARE1卡防冲突特性防冲突（AntiCollision）操作选择应用（Select）操作认证（Authentication）操作READ/WRITE操作ValueOperate值操作Increment/Decrement/TransferIncrement/Decrement/TransferHALT操作实训非接触式IC卡读写控制程序设计与调试实训步骤