连接图和 http://blog.csdn.net/zitech/article/details/24130405 中的一样
在这次试验中,我们会进行写与读两种操作,全部代码如下:
#include
#include
RFID rfid(10,5); //D10--读卡器MOSI引脚、D5--读卡器RST引脚
//4字节卡序列号,第5字节为校验字节
unsigned char serNum[5];
//写卡数据
unsigned char writeDate[16] ={'G', 'e', 'e', 'k', '-', 'W', 'o', 'r', 'k', 'S', 'h', 'o', 'p', 0, 0, 0};
//原扇区A密码,16个扇区,每个扇区密码6Byte
unsigned char sectorKeyA[16][16] = {
{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},};
//新扇区A密码,16个扇区,每个扇区密码6Byte
unsigned char sectorNewKeyA[16][16] = {
{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xff,0x07,0x80,0x69, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xff,0x07,0x80,0x69, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},};
void setup()
{
Serial.begin(9600);
SPI.begin();
rfid.init();
}
void loop()
{
unsigned char i,tmp;
unsigned char status;
unsigned char str[MAX_LEN];
unsigned char RC_size;
unsigned char blockAddr; //选择操作的块地址0~63
//找卡
rfid.isCard();
//读取卡序列号
if (rfid.readCardSerial())
{
Serial.print("The card's number is : ");
Serial.print(rfid.serNum[0],HEX);
Serial.print(rfid.serNum[1],HEX);
Serial.print(rfid.serNum[2],HEX);
Serial.print(rfid.serNum[3],HEX);
Serial.print(rfid.serNum[4],HEX);
Serial.println(" ");
}
//选卡,返回卡容量(锁定卡片,防止多次读写)
rfid.selectTag(rfid.serNum);
//写数据卡
blockAddr = 7; //数据块7
if (rfid.auth(PICC_AUTHENT1A, blockAddr, sectorKeyA[blockAddr/4], rfid.serNum) == MI_OK) //认证
{
//写数据
status = rfid.write(blockAddr, sectorNewKeyA[blockAddr/4]);
Serial.print("set the new card password, and can modify the data of the Sector: ");
Serial.println(blockAddr/4,DEC);
//写数据
blockAddr = blockAddr - 3 ; //数据块4
status = rfid.write(blockAddr, writeDate);
if(status == MI_OK)
{
Serial.println("Write card OK!");
}
}
//读卡
blockAddr = 7; //数据块7
status = rfid.auth(PICC_AUTHENT1A, blockAddr, sectorNewKeyA[blockAddr/4], rfid.serNum);
if (status == MI_OK) //认证
{
//读数据
blockAddr = blockAddr - 3 ; //数据块4
if( rfid.read(blockAddr, str) == MI_OK)
{
Serial.print("Read from the card ,the data is : ");
Serial.println((char *)str);
}
}
rfid.halt();
}
#include
所有代码(库文件)下载: RFID_MFRC522库文件
库文件 见:
#ifndef RFID_h
#define RFID_h
#include
#include
/******************************************************************************
* 定义
******************************************************************************/
#define MAX_LEN 16 // 数组最大长度
//MF522命令字
#define PCD_IDLE 0x00 //无动作,取消当前命令
#define PCD_AUTHENT 0x0E //验证密钥
#define PCD_RECEIVE 0x08 //接收数据
#define PCD_TRANSMIT 0x04 //发送数据
#define PCD_TRANSCEIVE 0x0C //发送并接收数据
#define PCD_RESETPHASE 0x0F //复位
#define PCD_CALCCRC 0x03 //CRC计算
//Mifare_One卡片命令字
#define PICC_REQIDL 0x26 //寻天线区内未进入休眠状态
#define PICC_REQALL 0x52 //寻天线区内全部卡
#define PICC_ANTICOLL 0x93 //防冲撞
#define PICC_SElECTTAG 0x93 //选卡
#define PICC_AUTHENT1A 0x60 //验证A密钥
#define PICC_AUTHENT1B 0x61 //验证B密钥
#define PICC_READ 0x30 //读块
#define PICC_WRITE 0xA0 //写块
#define PICC_DECREMENT 0xC0
#define PICC_INCREMENT 0xC1
#define PICC_RESTORE 0xC2 //调块数据到缓冲区
#define PICC_TRANSFER 0xB0 //保存缓冲区中数据
#define PICC_HALT 0x50 //休眠
//和MF522通讯时返回的错误代码
#define MI_OK 0
#define MI_NOTAGERR 1
#define MI_ERR 2
//------------------MFRC522寄存器---------------
//Page 0:Command and Status
#define Reserved00 0x00
#define CommandReg 0x01
#define CommIEnReg 0x02
#define DivlEnReg 0x03
#define CommIrqReg 0x04
#define DivIrqReg 0x05
#define ErrorReg 0x06
#define Status1Reg 0x07
#define Status2Reg 0x08
#define FIFODataReg 0x09
#define FIFOLevelReg 0x0A
#define WaterLevelReg 0x0B
#define ControlReg 0x0C
#define BitFramingReg 0x0D
#define CollReg 0x0E
#define Reserved01 0x0F
//Page 1:Command
#define Reserved10 0x10
#define ModeReg 0x11
#define TxModeReg 0x12
#define RxModeReg 0x13
#define TxControlReg 0x14
#define TxAutoReg 0x15
#define TxSelReg 0x16
#define RxSelReg 0x17
#define RxThresholdReg 0x18
#define DemodReg 0x19
#define Reserved11 0x1A
#define Reserved12 0x1B
#define MifareReg 0x1C
#define Reserved13 0x1D
#define Reserved14 0x1E
#define SerialSpeedReg 0x1F
//Page 2:CFG
#define Reserved20 0x20
#define CRCResultRegM 0x21
#define CRCResultRegL 0x22
#define Reserved21 0x23
#define ModWidthReg 0x24
#define Reserved22 0x25
#define RFCfgReg 0x26
#define GsNReg 0x27
#define CWGsPReg 0x28
#define ModGsPReg 0x29
#define TModeReg 0x2A
#define TPrescalerReg 0x2B
#define TReloadRegH 0x2C
#define TReloadRegL 0x2D
#define TCounterValueRegH 0x2E
#define TCounterValueRegL 0x2F
//Page 3:TestRegister
#define Reserved30 0x30
#define TestSel1Reg 0x31
#define TestSel2Reg 0x32
#define TestPinEnReg 0x33
#define TestPinValueReg 0x34
#define TestBusReg 0x35
#define AutoTestReg 0x36
#define VersionReg 0x37
#define AnalogTestReg 0x38
#define TestDAC1Reg 0x39
#define TestDAC2Reg 0x3A
#define TestADCReg 0x3B
#define Reserved31 0x3C
#define Reserved32 0x3D
#define Reserved33 0x3E
#define Reserved34 0x3F
//-----------------------------------------------
class RFID
{
public:
RFID(int chipSelectPin, int NRSTPD); //读卡器MOSI引脚、读卡器RST引脚
bool isCard();
bool readCardSerial();
void init();
void reset();
void setBitMask(unsigned char reg, unsigned char mask);
void clearBitMask(unsigned char reg, unsigned char mask);
void antennaOn(void);
void antennaOff(void);
void calculateCRC(unsigned char *pIndata, unsigned char len, unsigned char *pOutData);
void writeMFRC522(unsigned char addr, unsigned char val);
unsigned char readMFRC522(unsigned char addr);
unsigned char MFRC522Request(unsigned char reqMode, unsigned char *TagType);
unsigned char MFRC522ToCard(unsigned char command, unsigned char *sendData, unsigned char sendLen, unsigned char *backData, unsigned int *backLen);
unsigned char anticoll(unsigned char *serNum);
unsigned char auth(unsigned char authMode, unsigned char BlockAddr, unsigned char *Sectorkey, unsigned char *serNum);
unsigned char read(unsigned char blockAddr, unsigned char *recvData);
unsigned char write(unsigned char blockAddr, unsigned char *writeData);
unsigned char selectTag(unsigned char *serNum);
void halt();
unsigned char serNum[5]; // 4字节卡序列号,第5字节为校验字节
private:
int _chipSelectPin;
int _NRSTPD;
};
#endif
******************************************************************************
* 包含文件
******************************************************************************/
#include
#include
/******************************************************************************
* 构造 RFID
* int chipSelectPin RFID /ENABLE pin
******************************************************************************/
RFID::RFID(int chipSelectPin, int NRSTPD)
{
_chipSelectPin = chipSelectPin;
_NRSTPD = NRSTPD;
pinMode(_chipSelectPin,OUTPUT); // 设置管脚_chipSelectPin为输出并连接到模块使能口
digitalWrite(_chipSelectPin, LOW);
pinMode(_NRSTPD,OUTPUT); // 设置管脚NRSTPD为输出,非重置或掉电
digitalWrite(_NRSTPD, HIGH);
}
/******************************************************************************
* 用户 API
******************************************************************************/
/******************************************************************************
* 函 数 名:isCard
* 功能描述:寻卡
* 输入参数:无
* 返 回 值:成功返回ture 失败返回false
******************************************************************************/
bool RFID::isCard()
{
unsigned char status;
unsigned char str[MAX_LEN];
status = MFRC522Request(PICC_REQIDL, str);
if (status == MI_OK)
return true;
else
return false;
}
/******************************************************************************
* 函 数 名:readCardSerial
* 功能描述:返回卡的序列号 4字节
* 输入参数:无
* 返 回 值:成功返回ture 失败返回false
******************************************************************************/
bool RFID::readCardSerial(){
unsigned char status;
unsigned char str[MAX_LEN];
// 防冲撞,返回卡的序列号 4字节,存入serNum中
status = anticoll(str);
memcpy(serNum, str, 5);
if (status == MI_OK)
return true;
else
return false;
}
/******************************************************************************
* 函 数 名:init
* 功能描述:初始化RC522
* 输入参数:无
* 返 回 值:无
******************************************************************************/
void RFID::init()
{
digitalWrite(_NRSTPD,HIGH);
reset();
//Timer: TPrescaler*TreloadVal/6.78MHz = 24ms
writeMFRC522(TModeReg, 0x8D); //Tauto=1; f(Timer) = 6.78MHz/TPreScaler
writeMFRC522(TPrescalerReg, 0x3E); //TModeReg[3..0] + TPrescalerReg
writeMFRC522(TReloadRegL, 30);
writeMFRC522(TReloadRegH, 0);
writeMFRC522(TxAutoReg, 0x40); //100%ASK
writeMFRC522(ModeReg, 0x3D); // CRC valor inicial de 0x6363
//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0
//writeMFRC522(RxSelReg, 0x86); //RxWait = RxSelReg[5..0]
//writeMFRC522(RFCfgReg, 0x7F); //RxGain = 48dB
antennaOn(); //打开天线
}
/******************************************************************************
* 函 数 名:reset
* 功能描述:复位RC522
* 输入参数:无
* 返 回 值:无
******************************************************************************/
void RFID::reset()
{
writeMFRC522(CommandReg, PCD_RESETPHASE);
}
/******************************************************************************
* 函 数 名:writeMFRC522
* 功能描述:向MFRC522的某一寄存器写一个字节数据
* 输入参数:addr--寄存器地址;val--要写入的值
* 返 回 值:无
******************************************************************************/
void RFID::writeMFRC522(unsigned char addr, unsigned char val)
{
digitalWrite(_chipSelectPin, LOW);
//地址格式:0XXXXXX0
SPI.transfer((addr<<1)&0x7E);
SPI.transfer(val);
digitalWrite(_chipSelectPin, HIGH);
}
/******************************************************************************
* 函 数 名:readMFRC522
* 功能描述:从MFRC522的某一寄存器读一个字节数据
* 输入参数:addr--寄存器地址
* 返 回 值:返回读取到的一个字节数据
******************************************************************************/
unsigned char RFID::readMFRC522(unsigned char addr)
{
unsigned char val;
digitalWrite(_chipSelectPin, LOW);
SPI.transfer(((addr<<1)&0x7E) | 0x80);
val =SPI.transfer(0x00);
digitalWrite(_chipSelectPin, HIGH);
return val;
}
/******************************************************************************
* 函 数 名:setBitMask
* 功能描述:置RC522寄存器位
* 输入参数:reg--寄存器地址;mask--置位值
* 返 回 值:无
******************************************************************************/
void RFID::setBitMask(unsigned char reg, unsigned char mask)
{
unsigned char tmp;
tmp = readMFRC522(reg);
writeMFRC522(reg, tmp | mask); // set bit mask
}
/******************************************************************************
* 函 数 名:clearBitMask
* 功能描述:清RC522寄存器位
* 输入参数:reg--寄存器地址;mask--清位值
* 返 回 值:无
******************************************************************************/
void RFID::clearBitMask(unsigned char reg, unsigned char mask)
{
unsigned char tmp;
tmp = readMFRC522(reg);
writeMFRC522(reg, tmp & (~mask)); // clear bit mask
}
/******************************************************************************
* 函 数 名:antennaOn
* 功能描述:开启天线,每次启动或关闭天险发射之间应至少有1ms的间隔
* 输入参数:无
* 返 回 值:无
******************************************************************************/
void RFID::antennaOn(void)
{
unsigned char temp;
temp = readMFRC522(TxControlReg);
if (!(temp & 0x03))
{
setBitMask(TxControlReg, 0x03);
}
}
/******************************************************************************
* 函 数 名:antennaOff
* 功能描述:关闭天线,每次启动或关闭天险发射之间应至少有1ms的间隔
* 输入参数:无
* 返 回 值:无
******************************************************************************/
void RFID::antennaOff(void)
{
unsigned char temp;
temp = readMFRC522(TxControlReg);
if (!(temp & 0x03))
{
clearBitMask(TxControlReg, 0x03);
}
}
/******************************************************************************
* 函 数 名:calculateCRC
* 功能描述:用MF522计算CRC
* 输入参数:pIndata--要读数CRC的数据,len--数据长度,pOutData--计算的CRC结果
* 返 回 值:无
******************************************************************************/
void RFID::calculateCRC(unsigned char *pIndata, unsigned char len, unsigned char *pOutData)
{
unsigned char i, n;
clearBitMask(DivIrqReg, 0x04); //CRCIrq = 0
setBitMask(FIFOLevelReg, 0x80); //清FIFO指针
//Write_MFRC522(CommandReg, PCD_IDLE);
//向FIFO中写入数据
for (i=0; i MAX_LEN)
n = MAX_LEN;
//读取FIFO中接收到的数据
for (i=0; i