【STM32】STM32使用RFID读卡器

STM32使用RFID读卡器

RFID卡片

• ID卡（身份标识）：作用就是比如你要输入学号，你刷卡直接就相当于输入学号，省去了输入的过程

• IC卡：集成电路卡，是将一种微电子芯片嵌入卡片之中

RFID的操作

1、初始化

(1)请求卡—寻找附近所有信号的卡

(2)防碰撞—选择一张信号最强的卡（得到卡的ID）

(3)选卡—选择一张要通信的卡

(4)密钥验证—验证身份

(5)读写卡片—数据读写

2、接线引脚表

RFID	STM32
SDA	PA4（SPI1_NSS）
SCK	PA5（SPI1_SCK）
MOSI	PA7（SPI1_MOSI）
MISO	PA6（SPI1_MISO）
IRQ	悬空
GND	GND
RST	PA12
3V3	3.3v

3、代码

厂家给的测试代码改写

#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "mfrc522.h"
#include "ZigBee.h"
#include "relay.h"#define MAXRLEN 18void MFRC522_Init(void) {GPIO_InitTypeDef  GPIO_InitStructure;/* Enable the GPIO Clock */RCC_APB2PeriphClockCmd(MF522_RST_CLK, ENABLE);/* Configure the GPIO pin */GPIO_InitStructure.GPIO_Pin = MF522_RST_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_Init(MF522_RST_PORT, &GPIO_InitStructure);/* Enable the GPIO Clock */RCC_APB2PeriphClockCmd(MF522_MISO_CLK, ENABLE);/* Configure the GPIO pin */GPIO_InitStructure.GPIO_Pin = MF522_MISO_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_Init(MF522_MISO_PORT, &GPIO_InitStructure);/* Enable the GPIO Clock */RCC_APB2PeriphClockCmd(MF522_MOSI_CLK, ENABLE);/* Configure the GPIO pin */GPIO_InitStructure.GPIO_Pin = MF522_MOSI_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_Init(MF522_MOSI_PORT, &GPIO_InitStructure);/* Enable the GPIO Clock */RCC_APB2PeriphClockCmd(MF522_SCK_CLK, ENABLE);/* Configure the GPIO pin */GPIO_InitStructure.GPIO_Pin = MF522_SCK_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_Init(MF522_SCK_PORT, &GPIO_InitStructure);/* Enable the GPIO Clock */RCC_APB2PeriphClockCmd(MF522_NSS_CLK, ENABLE);/* Configure the GPIO pin */GPIO_InitStructure.GPIO_Pin = MF522_NSS_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_Init(MF522_NSS_PORT, &GPIO_InitStructure);/* Enable the GPIO Clock */RCC_APB2PeriphClockCmd(LED_CLK, ENABLE);PcdReset();PcdAntennaOn();  
}/
//功    能：寻卡
//参数说明: req_code[IN]:寻卡方式
//                0x52 = 寻感应区内所有符合14443A标准的卡
//                0x26 = 寻未进入休眠状态的卡
//          	  pTagType[OUT]：卡片类型代码
//                0x4400 = Mifare_UltraLight
//                0x0400 = Mifare_One(S50)
//                0x0200 = Mifare_One(S70)
//                0x0800 = Mifare_Pro(X)
//                0x4403 = Mifare_DESFire
//返    回: 成功返回MI_OK
/
char PcdRequest(unsigned char req_code,unsigned char *pTagType)
{char status;  unsigned int  unLen;unsigned char ucComMF522Buf[MAXRLEN]; 
//  unsigned char xTest ;ClearBitMask(Status2Reg,0x08);WriteRawRC(BitFramingReg,0x07);//  xTest = ReadRawRC(BitFramingReg);
//  if(xTest == 0x07 )//   { LED_GREEN  =0 ;}// else {LED_GREEN =1 ;while(1){}}SetBitMask(TxControlReg,0x03);ucComMF522Buf[0] = req_code;status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);
//     if(status  == MI_OK )
//   { LED_GREEN  =0 ;}
//   else {LED_GREEN =1 ;}if ((status == MI_OK) && (unLen == 0x10)){    *pTagType     = ucComMF522Buf[0];*(pTagType+1) = ucComMF522Buf[1];}else{   status = MI_ERR;   }return status;
}/
//功    能：防冲撞
//参数说明: pSnr[OUT]:卡片序列号，4字节
//返    回: 成功返回MI_OK
/  
char PcdAnticoll(unsigned char *pSnr)
{char status;unsigned char i,snr_check=0;unsigned int  unLen;unsigned char ucComMF522Buf[MAXRLEN]; ClearBitMask(Status2Reg,0x08);WriteRawRC(BitFramingReg,0x00);ClearBitMask(CollReg,0x80);ucComMF522Buf[0] = PICC_ANTICOLL1;ucComMF522Buf[1] = 0x20;status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,2,ucComMF522Buf,&unLen);if (status == MI_OK){for (i=0; i<4; i++){   *(pSnr+i)  = ucComMF522Buf[i];snr_check ^= ucComMF522Buf[i];}if (snr_check != ucComMF522Buf[i]){   status = MI_ERR;    }}SetBitMask(CollReg,0x80);return status;
}/
//功    能：选定卡片
//参数说明: pSnr[IN]:卡片序列号，4字节
//返    回: 成功返回MI_OK
/
char PcdSelect(unsigned char *pSnr)
{char status;unsigned char i;unsigned int  unLen;unsigned char ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_ANTICOLL1;ucComMF522Buf[1] = 0x70;ucComMF522Buf[6] = 0;for (i=0; i<4; i++){ucComMF522Buf[i+2] = *(pSnr+i);ucComMF522Buf[6]  ^= *(pSnr+i);}CalulateCRC(ucComMF522Buf,7,&ucComMF522Buf[7]);ClearBitMask(Status2Reg,0x08);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,9,ucComMF522Buf,&unLen);if ((status == MI_OK) && (unLen == 0x18)){   status = MI_OK;  }else{   status = MI_ERR;    }return status;
}/
//功    能：验证卡片密码
//参数说明: auth_mode[IN]: 密码验证模式
//                 0x60 = 验证A密钥
//                 0x61 = 验证B密钥 
//          addr[IN]：块地址
//          pKey[IN]：密码
//          pSnr[IN]：卡片序列号，4字节
//返    回: 成功返回MI_OK
/               
char PcdAuthState(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr)
{char status;unsigned int  unLen;unsigned char i,ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = auth_mode;ucComMF522Buf[1] = addr;for (i=0; i<6; i++){    ucComMF522Buf[i+2] = *(pKey+i);   }for (i=0; i<6; i++){    ucComMF522Buf[i+8] = *(pSnr+i);   }//   memcpy(&ucComMF522Buf[2], pKey, 6); //   memcpy(&ucComMF522Buf[8], pSnr, 4); status = PcdComMF522(PCD_AUTHENT,ucComMF522Buf,12,ucComMF522Buf,&unLen);if ((status != MI_OK) || (!(ReadRawRC(Status2Reg) & 0x08))){   status = MI_ERR;   }return status;
}/
//功    能：读取M1卡一块数据
//参数说明: addr[IN]：块地址
//          pData[OUT]：读出的数据，16字节
//返    回: 成功返回MI_OK
/ 
char PcdRead(unsigned char addr,unsigned char *pData)
{char status;unsigned int  unLen;unsigned char i,ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_READ;ucComMF522Buf[1] = addr;CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);if ((status == MI_OK) && (unLen == 0x90))//   {   memcpy(pData, ucComMF522Buf, 16);   }{for (i=0; i<16; i++){    *(pData+i) = ucComMF522Buf[i];   }}else{   status = MI_ERR;   }return status;
}/
//功    能：写数据到M1卡一块
//参数说明: addr[IN]：块地址
//          pData[IN]：写入的数据，16字节
//返    回: 成功返回MI_OK
/                  
char PcdWrite(unsigned char addr,unsigned char *pData)
{char status;unsigned int  unLen;unsigned char i,ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_WRITE;ucComMF522Buf[1] = addr;CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);if ((status != MI_OK) || (unLen != 4) || ((ucComMF522Buf[0] & 0x0F) != 0x0A)){   status = MI_ERR;   }if (status == MI_OK){//memcpy(ucComMF522Buf, pData, 16);for (i=0; i<16; i++){    ucComMF522Buf[i] = *(pData+i);   }CalulateCRC(ucComMF522Buf,16,&ucComMF522Buf[16]);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,18,ucComMF522Buf,&unLen);if ((status != MI_OK) || (unLen != 4) || ((ucComMF522Buf[0] & 0x0F) != 0x0A)){   status = MI_ERR;   }}return status;
}/
//功    能：命令卡片进入休眠状态
//返    回: 成功返回MI_OK
/
char PcdHalt(void)
{unsigned int  unLen;unsigned char ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_HALT;ucComMF522Buf[1] = 0;CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);return MI_OK;
}/
//用MF522计算CRC16函数
/
void CalulateCRC(unsigned char *pIndata,unsigned char len,unsigned char *pOutData)
{unsigned char i,n;ClearBitMask(DivIrqReg,0x04);WriteRawRC(CommandReg,PCD_IDLE);SetBitMask(FIFOLevelReg,0x80);for (i=0; i<len; i++){   WriteRawRC(FIFODataReg, *(pIndata+i));   }WriteRawRC(CommandReg, PCD_CALCCRC);i = 0xFF;do {n = ReadRawRC(DivIrqReg);i--;}while ((i!=0) && !(n&0x04));pOutData[0] = ReadRawRC(CRCResultRegL);pOutData[1] = ReadRawRC(CRCResultRegM);
}/
//功    能：复位RC522
//返    回: 成功返回MI_OK
/
char PcdReset(void)
{RST_H;delay_10ms(1);RST_L;delay_10ms(1);RST_H;delay_10ms(10);//		if(ReadRawRC(0x02) == 0x80)
//		{
//			LED_ON;
//			delay_10ms(10);	
//			LED_OFF;
//			delay_10ms(10);	
//			LED_ON;
//			delay_10ms(10);	
//			LED_OFF;
//			delay_10ms(10);	
//		}WriteRawRC(CommandReg,PCD_RESETPHASE);WriteRawRC(ModeReg,0x3D);            //和Mifare卡通讯，CRC初始值0x6363WriteRawRC(TReloadRegL,30);           WriteRawRC(TReloadRegH,0);WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);WriteRawRC(TxAutoReg,0x40);     return MI_OK;
}
//
//设置RC632的工作方式 
//
char M500PcdConfigISOType(unsigned char type)
{if (type == 'A')                     //ISO14443_A{ ClearBitMask(Status2Reg,0x08);/*     WriteRawRC(CommandReg,0x20);    //as default   WriteRawRC(ComIEnReg,0x80);     //as defaultWriteRawRC(DivlEnReg,0x0);      //as defaultWriteRawRC(ComIrqReg,0x04);     //as defaultWriteRawRC(DivIrqReg,0x0);      //as defaultWriteRawRC(Status2Reg,0x0);//80    //trun off temperature sensorWriteRawRC(WaterLevelReg,0x08); //as defaultWriteRawRC(ControlReg,0x20);    //as defaultWriteRawRC(CollReg,0x80);    //as default
*/WriteRawRC(ModeReg,0x3D);//3F
/*	   WriteRawRC(TxModeReg,0x0);      //as default???WriteRawRC(RxModeReg,0x0);      //as default???WriteRawRC(TxControlReg,0x80);  //as default???WriteRawRC(TxSelReg,0x10);      //as default???*/WriteRawRC(RxSelReg,0x86);//84//      WriteRawRC(RxThresholdReg,0x84);//as default//      WriteRawRC(DemodReg,0x4D);      //as default//      WriteRawRC(ModWidthReg,0x13);//26WriteRawRC(RFCfgReg,0x7F);   //4F/*   WriteRawRC(GsNReg,0x88);        //as default???WriteRawRC(CWGsCfgReg,0x20);    //as default???WriteRawRC(ModGsCfgReg,0x20);   //as default???
*/WriteRawRC(TReloadRegL,30);//tmoLength);// TReloadVal = 'h6a =tmoLength(dec) WriteRawRC(TReloadRegH,0);WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);//     PcdSetTmo(106);delay_10ms(1);PcdAntennaOn();}else{ return (char)-1; }return MI_OK;
}
/
//功    能：读RC632寄存器
//参数说明：Address[IN]:寄存器地址
//返    回：读出的值
/
unsigned char ReadRawRC(unsigned char Address)
{unsigned char i, ucAddr;unsigned char ucResult=0;NSS_L;ucAddr = ((Address<<1)&0x7E)|0x80;for(i=8;i>0;i--){SCK_L;if(ucAddr&0x80)MOSI_H;elseMOSI_L;SCK_H;ucAddr <<= 1;}for(i=8;i>0;i--){SCK_L;ucResult <<= 1;SCK_H;if(READ_MISO == 1)ucResult |= 1;}NSS_H;SCK_H;return ucResult;
}/
//功    能：写RC632寄存器
//参数说明：Address[IN]:寄存器地址
//          value[IN]:写入的值
/
void WriteRawRC(unsigned char Address, unsigned char value)
{  unsigned char i, ucAddr;SCK_L;NSS_L;ucAddr = ((Address<<1)&0x7E);for(i=8;i>0;i--){if(ucAddr&0x80)MOSI_H;elseMOSI_L;SCK_H;ucAddr <<= 1;SCK_L;}for(i=8;i>0;i--){if(value&0x80)MOSI_H;elseMOSI_L;SCK_H;value <<= 1;SCK_L;}NSS_H;SCK_H;
}/
//功    能：置RC522寄存器位
//参数说明：reg[IN]:寄存器地址
//          mask[IN]:置位值
/
void SetBitMask(unsigned char reg,unsigned char mask)  
{char tmp = 0x0;tmp = ReadRawRC(reg);WriteRawRC(reg,tmp | mask);  // set bit mask
}/
//功    能：清RC522寄存器位
//参数说明：reg[IN]:寄存器地址
//          mask[IN]:清位值
/
void ClearBitMask(unsigned char reg,unsigned char mask)  
{char tmp = 0x0;tmp = ReadRawRC(reg);WriteRawRC(reg, tmp & ~mask);  // clear bit mask
} /
//功    能：通过RC522和ISO14443卡通讯
//参数说明：Command[IN]:RC522命令字
//          pInData[IN]:通过RC522发送到卡片的数据
//          InLenByte[IN]:发送数据的字节长度
//          pOutData[OUT]:接收到的卡片返回数据
//          *pOutLenBit[OUT]:返回数据的位长度
/
char PcdComMF522(unsigned char Command, unsigned char *pInData, unsigned char InLenByte,unsigned char *pOutData, unsigned int  *pOutLenBit)
{char status = MI_ERR;unsigned char irqEn   = 0x00;unsigned char waitFor = 0x00;unsigned char lastBits;unsigned char n;unsigned int i;switch (Command){case PCD_AUTHENT:irqEn   = 0x12;waitFor = 0x10;break;case PCD_TRANSCEIVE:irqEn   = 0x77;waitFor = 0x30;break;default:break;}WriteRawRC(ComIEnReg,irqEn|0x80);ClearBitMask(ComIrqReg,0x80);WriteRawRC(CommandReg,PCD_IDLE);SetBitMask(FIFOLevelReg,0x80);for (i=0; i<InLenByte; i++){   WriteRawRC(FIFODataReg, pInData[i]);    }WriteRawRC(CommandReg, Command);if (Command == PCD_TRANSCEIVE){    SetBitMask(BitFramingReg,0x80);  }//    i = 600;//根据时钟频率调整，操作M1卡最大等待时间25msi = 2000;do {n = ReadRawRC(ComIrqReg);i--;}while ((i!=0) && !(n&0x01) && !(n&waitFor));ClearBitMask(BitFramingReg,0x80);if (i!=0){    if(!(ReadRawRC(ErrorReg)&0x1B)){status = MI_OK;if (n & irqEn & 0x01){   status = MI_NOTAGERR;   }if (Command == PCD_TRANSCEIVE){n = ReadRawRC(FIFOLevelReg);lastBits = ReadRawRC(ControlReg) & 0x07;if (lastBits){   *pOutLenBit = (n-1)*8 + lastBits;   }else{   *pOutLenBit = n*8;   }if (n == 0){   n = 1;    }if (n > MAXRLEN){   n = MAXRLEN;   }for (i=0; i<n; i++){   pOutData[i] = ReadRawRC(FIFODataReg);    }}}else{   status = MI_ERR;   }}SetBitMask(ControlReg,0x80);           // stop timer nowWriteRawRC(CommandReg,PCD_IDLE); return status;
}/
//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
/
void PcdAntennaOn()
{unsigned char i;i = ReadRawRC(TxControlReg);if (!(i & 0x03)){SetBitMask(TxControlReg, 0x03);}
}/
//关闭天线
/
void PcdAntennaOff()
{ClearBitMask(TxControlReg, 0x03);
}//等待卡离开
void WaitCardOff(void)
{char          status;unsigned char	TagType[2];while(1){status = PcdRequest(REQ_ALL, TagType);if(status){status = PcdRequest(REQ_ALL, TagType);if(status){status = PcdRequest(REQ_ALL, TagType);if(status){return;}}}delay_10ms(100);}
}void MFRC522_Judge(void) {char status;unsigned char snr, buf[16], TagType[2], SelectedSnr[4], DefaultKey[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; status= PcdRequest(REQ_ALL,TagType);	// 寻卡if(!status){status = PcdAnticoll(SelectedSnr);	// 防碰撞if(!status){status=PcdSelect(SelectedSnr);	// 选卡if(!status){snr = 1;  //扇区号1status = PcdAuthState(KEYA, (snr*4+3), DefaultKey, SelectedSnr);// 验证卡片密码 校验1扇区密码，密码位于每一扇区第3块{if(!status){status = PcdRead((snr*4+0), buf);  // 读卡，读取1扇区0块数据到buf[0]-buf[16] //status = PcdWrite((snr*4+0), "12345678");  // 写卡，将buf[0]-buf[16]写入1扇区0块if(strcmp((char *)buf, "12345678") == 0){printf("\r\n密码正确... \r\n");}else {printf("\r\n密码错误... \r\n");}if(!status)	WaitCardOff();	//等待卡离开}}}}}	}