基于STM8的RC522读卡方案

//#include <intrins.h> #include "hardware_defs.h" // requires compiler_defs.h #include "CPU_init.h" // requires compiler_defs.h #include "mfrc522.h" #include <string.h> #include "ISO14443_4.h" #define MAXRLEN 64 //void WR_FIFO(unsigned char Address,unsigned char *Buf,unsigned char nlen); //void RD_FIFO(unsigned char *Buf,unsigned char Len); //指示灯 //#define LED 6//sbit LED = P1^6; ///////////////////////////////////////////////////////////////////// //函数原型 ///////////////////////////////////////////////////////////////////// unsigned char SPI_RW(unsigned char value) { while(!(SPI_SR & 0X02));//判断发射为不为空 SPI_DR = value; //写值 while(!(SPI_SR & 0X02));//判断发射为不为空 while(!(SPI_SR & 0x01));//判断是否收到数据 return SPI_DR; } //#define ucComMF522Buf SerBfr unsigned char fHasRATS = 0; void RC522_Init(void) { unsigned char Temp; delay_10ms(1); WriteRawRC(ControlReg,0x10);//18 10 WriteRawRC(ModeReg,0x3F);//22 3f WriteRawRC(RFU23,0x00);//46 00 WriteRawRC(RFU25,0x80);//4a 80 WriteRawRC(AutoTestReg,0x40);//6c 40 WriteRawRC(TxAutoReg,0x40);//2a 40 ReadRawRC(TxAutoReg);//aa 40 SetBitMask(TxControlReg,0x03);//a8 80 28 83 WriteRawRC(TPrescalerReg,0x3D);//56 3d WriteRawRC(TModeReg,0x0D);//54 0d WriteRawRC(TReloadRegL,0x0A);//5a 0a WriteRawRC(TReloadRegH,0x00);//58 00 WriteRawRC(ComIrqReg,0x01);//08 01 SetBitMask(ControlReg,0x40);//98 10 18 50 do { Temp = ReadRawRC(ComIrqReg);//88 15 }while(!(Temp&0x01)); WriteRawRC(ComIrqReg,0x01);//08 01 WriteRawRC(CommandReg,0x00);//02 00 } ///////////////////////////////////////////////////////////////////// //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 ///////////////////////////////////////////////////////////////////// unsigned char PcdRequest(unsigned char req_code,unsigned char *pTagType) { /*当选卡时，并未进入寻卡和锁卡，因此要更改 */ char status; unsigned int unLen; unsigned char ucComMF522Buf[MAXRLEN]; char i=0; if(fHasRATS != 1) { do { status = ReadRawRC(Status2Reg); //90 00(01,05) WriteRawRC(Status2Reg,status&0xf7); //10 00 WriteRawRC(CollReg,0x80); //1c 80 ClearBitMask(TxModeReg,0x80); //a4 00 24 00 ClearBitMask(RxModeReg,0x80); //a6 00 26 00 WriteRawRC(BitFramingReg,0x07); //1a 07 SetBitMask(TxControlReg,0x03); //a8 83 28 83 ucComMF522Buf[0] = req_code; i++; status = PcdComMF522_P(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen,0x0002); if(i>=2) break; Delay1us(5); }while(status ==MI_TIMEOUT ); } else { SetBitMask(TxModeReg,0x80);//a4 80 24 80 SetBitMask(RxModeReg,0x80);//a6 80 26 80 ucComMF522Buf[0] = 0xCA; ucComMF522Buf[1] = 0x00; status = PcdComMF522_P(PCD_TRANSCEIVE,ucComMF522Buf,2,ucComMF522Buf,&unLen,0x00F0); //add below 3lines status = ReadRawRC(Status2Reg); //90 00(01,05) WriteRawRC(Status2Reg,status&0xf7); //10 00 WriteRawRC(CollReg,0x80); //1c 80 ClearBitMask(TxModeReg,0x80); //a4 80 24 00 ClearBitMask(RxModeReg,0x80); //a6 00 26 00 WriteRawRC(BitFramingReg,0x07); //1a 07 //add 1 line SetBitMask(TxControlReg,0x03);//a8 83 28 83 ucComMF522Buf[0] = req_code; status = PcdComMF522_P(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen,0x0002); if(status == 0) fHasRATS = 0; } 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 ///////////////////////////////////////////////////////////////////// unsigned char PcdAnticoll(unsigned char *pSnr) { unsigned char status; unsigned int unLen; unsigned char ucComMF522Buf[MAXRLEN]; unsigned char i; unsigned char snr_check=0; ClearBitMask(TxModeReg,0x80);//a4 00 24 00 ClearBitMask(RxModeReg,0x80);//a6 00 26 00 WriteRawRC(CollReg,0x00); //1c 00 Delay1us(200); WriteRawRC(BitFramingReg,0x00);//1a 00 ucComMF522Buf[0] = PICC_ANTICOLL1; ucComMF522Buf[1] = 0x20; status = PcdComMF522_P(PCD_TRANSCEIVE,ucComMF522Buf,2,ucComMF522Buf,&unLen,0x0020); Delay1us(100); WriteRawRC(BitFramingReg,0x00);//1a 00 WriteRawRC(CollReg,0x80);//1c 80 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; } } 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 ///////////////////////////////////////////////////////////////////// unsigned char PcdSelect(unsigned char *pSnr) { char status; unsigned char ucComMF522Buf[MAXRLEN]; unsigned char i; unsigned int unLen; /* status= PcdRequest(PICC_REQALL,ucComMF522Buf); if(status!=0) { status= PcdRequest(PICC_REQALL,ucComMF522Buf); if(status!=0) { status = MI_ERR; } } status = PcdAnticoll(pSnr); if(status!=0) { return MI_ERR; } */ SetBitMask(TxModeReg,0x80);//a4 80 24 80 SetBitMask(RxModeReg,0x80);//a6 00 26 80 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); } status = PcdComMF522_P(PCD_TRANSCEIVE,ucComMF522Buf,7,ucComMF522Buf,&unLen,0x0010); if ((status == MI_OK))//&& (unLen == 0x18)) { pSnr[0] = ucComMF522Buf[0]; } else { status = MI_ERR; } return status; } ///////////////////////////////////////////////////////////////////// //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)//Kevin modify { #if 0 unsigned char xdata i, ucAddr; unsigned char xdata ucResult=0; SetIO_DATA(MF522_SCK,0);//MF522_SCK = 0; SetIO_DATA(MF522_NSS,0);//MF522_NSS = 0; // Delay1us(1); ucAddr = ((Address<<1)&0x7E)|0x80; for(i=8;i>0;i--) { SetIO_DATA(MF522_SI,((ucAddr&0x80)));//MF522_SI = ((ucAddr&0x80)==0x80); //Delay1us(1); SetIO_DATA(MF522_SCK,1);//MF522_SCK = 1; //Delay1us(1); ucAddr <<= 1; SetIO_DATA(MF522_SCK,0);//MF522_SCK = 0; //Delay1us(1); } // Delay1us(15); for(i=8;i>0;i--) { SetIO_DATA(MF522_SCK,1);//MF522_SCK = 1; //Delay1us(1); ucResult <<= 1; ucResult|=(bit)GetIO_DATA(MF522_SO); //Delay1us(1); SetIO_DATA(MF522_SCK,0);//MF522_SCK = 0; //Delay1us(1); } //Delay1us(1); SetIO_DATA(MF522_NSS,1);//MF522_NSS = 1; //SetIO_DATA(MF522_SCK,1);//MF522_SCK = 1; SetIO_DATA(MF522_SCK,0);//MF522_SCK = 0;//by jack add 091127 return ucResult; #else unsigned char ucResult; unsigned char ucAddr; ucAddr = ((Address<<1)&0x7E)|0x80; NSS1 = 0; asm("nop"); asm