原理图:
单片机源程序如下:
#include "reg52.h"
#include "main.h"
#include "mfrc522.h"
#include
//M1卡的某一块写为如下格式,则该块为钱包,可接收扣款和充值命令
//4字节金额(低字节在前)+4字节金额取反+4字节金额+1字节块地址+1字节块地址取反+1字节块地址+1字节块地址取反
unsigned char code data2[4] = {0x12,0,0,0};
unsigned char code DefaultKey[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
unsigned char g_ucTempbuf[20];
unsigned char idata MLastSelectedSnr[4];
unsigned char idata RevBuffer[30];
unsigned char data SerBuffer[20];
bit CmdValid;
void iccardcode()
{
unsigned char cmd;
unsigned char status;
cmd = RevBuffer[0];
switch(cmd)
{
case 1: // Halt the card //终止卡的操作
status= PcdHalt();;
RevBuffer[0]=1;
RevBuffer[1]=status;
break;
case 2: // Request,Anticoll,Select,return CardType(2 bytes)+CardSerialNo(4 bytes)
// 寻卡,防冲突,选择卡 返回卡类型(2 bytes)+ 卡系列号(4 bytes)
status= PcdRequest(RevBuffer[1],&RevBuffer[2]);
if(status!=0)
{
status= PcdRequest(RevBuffer[1],&RevBuffer[2]);
if(status!=0)
{
RevBuffer[0]=1;
RevBuffer[1]=status;
break;
}
}
RevBuffer[0]=3;
RevBuffer[1]=status;
break;
case 3: // 防冲突 读卡的系列号 MLastSelectedSnr
status = PcdAnticoll(&RevBuffer[2]);
if(status!=0)
{
RevBuffer[0]=1;
RevBuffer[1]=status;
break;
}
memcpy(MLastSelectedSnr,&RevBuffer[2],4);
RevBuffer[0]=5;
RevBuffer[1]=status;
break;
case 4: // 选择卡 Select Card
status=PcdSelect(MLastSelectedSnr);
if(status!=MI_OK)
{
RevBuffer[0]=1;
RevBuffer[1]=status;
break;
}
RevBuffer[0]=3;
RevBuffer[1]=status;
break;
case 5: // Key loading into the MF RC500's EEPROM
status = PcdAuthState(RevBuffer[1], RevBuffer[3], DefaultKey, MLastSelectedSnr);// 校验卡密码
RevBuffer[0]=1;
RevBuffer[1]=status;
break;
case 6:
RevBuffer[0]=1;
RevBuffer[1]=status;
break;
case 7:
RevBuffer[0]=1;
RevBuffer[1]=status;
break;
case 8: // Read the mifare card
// 读卡
status=PcdRead(RevBuffer[1],&RevBuffer[2]);
if(status==0)
{RevBuffer[0]=17;}
else
{RevBuffer[0]=1;}
RevBuffer[1]=status;
break;
case 9: // Write the mifare card
// 写
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