淘寶上買了一個rfid板，
如下，左邊是單片機stc11f32x，右邊是rfid小板

射頻小板的主控芯片是rc522，可讀iso 14443 type a卡,比如s50卡，店主送了兩張。簡介一下s50卡吧，

注:ICC（Integrated Circuit Card）為集成電路卡，CD（Coupling Device）指讀寫設備

s50卡的eeprom共16扇區；每扇區4塊，共64塊；每塊16字節，則每扇區16x4=64字節，每卡64x16=1024字節，如下


所有塊統一編址，每扇區的尾塊是控制塊，其余為數據塊，但扇區1的塊0特殊一點，記錄了廠家序列號之類的，只讀。
本例將數據存入扇區1的塊4。對某扇區進行讀寫需要通過密碼驗證，密碼保存在該扇區的控制塊中。

先看連線，如下，左邊是單片機右邊是rc522的接口，rc522支持spi i2c 串口，但是stc11f32x卻沒有這些接口，所以stc11f32x只能模擬spi時序與rc522通訊，模擬用的引腳是
P0.5? MF_SDA(NSS片選)
P0.6? MF_SCK(時鐘)
P0.7? MF_MOSI
P4.1? MF_MISO
P2.7? MF_RST



相關單片機程序如下
void InitRc522(void)//初始化rc522 {PcdReset();PcdAntennaOff(); ?PcdAntennaOn();M500PcdConfigISOType( 'A' ); } void InitAll(void) {Dlms(100);InitPort();Dlms(100);InitLcd0108();InitRc522();EA=0;init_time0();uart_init();EA=1; //re-enable interrupts ?TimeShowMenu=0;bShowMenu=0; //? bShowTime=1;bWarn=0;bPass=0;SysTime=0;KeyTime=0;KeyNum=0;bTimed=1;bMenued=0; bShowWelcome=1; TimeShowMenu=250; }void ctrlprocess(void) {float data money_value; // unsigned char ConsumedData;unsigned char data ii;char data status;status=PcdRequest(PICC_REQIDL,&RevBuffer[0]);//尋天線區內未進入休眠狀態的卡，返回卡片類型 2字節if(status!=MI_OK){return;}status=PcdAnticoll(&RevBuffer[2]);//防沖撞，返回卡的序列號 4字節if(status!=MI_OK){return;}if(!bShowMenu){bShowMenu=1;//bShowWelcome=0;bTimed=0;bMenued=1; ShowMenu();}TimeShowMenu=0;//Clear88(0,5,2,8);Clear88(2,5,2,8);Clear88(4,5,2,8);//Clear88(6,5,2,8);memcpy(MLastSelectedSnr,&RevBuffer[2],4);for(ii=0;ii<4;ii++){Show816(0,5+2*ii,(MLastSelectedSnr[ii]>>4)&0x0f);Show816(0,6+2*ii,MLastSelectedSnr[ii]&0x0f);} status=PcdSelect(MLastSelectedSnr);//選卡if(status!=MI_OK){return;}if(oprationcard==REGCARD)//注冊{status=PcdAuthState(PICC_AUTHENT1A,7,LastKeyA,MLastSelectedSnr);//????KUAI4?//DelayNS(1);if(status!=MI_OK){bWarn=1;return;}status=PcdWrite(7,&NewKey[0]);if(status!=MI_OK){bWarn=1;return;}for(ii=0;ii<16;ii++){Write_First_Data[ii]=0xaa;}status=PcdWrite(4,&Write_First_Data[0]);if(status!=MI_OK){bWarn=1;return;}bPass=1; PcdHalt(); }else if(oprationcard==READCARD)//讀卡{status=PcdAuthState(PICC_AUTHENT1A,7,NewKeyA,MLastSelectedSnr);//????KUAI4?if(status!=MI_OK){return;}status=PcdRead(4,Read_Data);if(status!=MI_OK){bWarn=1;return;}for(ii=0;ii<16;ii++){Write_First_Data[ii]=0xaa;}status=PcdWrite(4,&Write_First_Data[0]);for(ii=0;ii<4;ii++){fltchr.chr[ii]=Read_Data[ii];sendchar1(fltchr.chr[ii]);} //ShowFloat816(4,5,fltchr.flt); ShowFloat816(4,5,fltchr.flt); if(fltchr.flt<0){bWarn=1;} bPass=1;PcdHalt(); }else if(oprationcard==CONSUME)//消費{status=PcdAuthState(PICC_AUTHENT1A,7,NewKeyA,MLastSelectedSnr);//????KUAI4?if(status!=MI_OK){return;}status=PcdRead(4,Read_Data);if(status!=MI_OK){bWarn=1;return;}for(ii=0;ii<4;ii++) //{fltchr.chr[ii]=Read_Data[ii];sendchar1(fltchr.chr[ii]);}money_value=fltchr.flt;if(money_value<-100){money_value=-100;}if(money_value<0){money_value+=100;}fltchr.flt=money_value-2.5;for(ii=0;ii<4;ii++){Write_Consume_Data[ii]=fltchr.chr[ii];}status=PcdWrite(4,&Write_Consume_Data[0]);for(ii=0;ii<4;ii++) {sendchar1(fltchr.chr[ii]);}if(status!=MI_OK){bWarn=1;return;} ShowFloat816(2,5,2.58);ShowFloat816(4,5,fltchr.flt); if(fltchr.flt<0){bWarn=1;} else{ bPass=1;}PcdHalt(); }else if(oprationcard==ADDMONEY)//充值{status=PcdAuthState(PICC_AUTHENT1A,7,NewKeyA,MLastSelectedSnr);//????KUAI4?if(status!=MI_OK){return;}status=PcdRead(4,Read_Data);if(status!=MI_OK){bWarn=1;return;}for(ii=0;ii<4;ii++){fltchr.chr[ii]=Read_Data[ii];}money_value=fltchr.flt;if(money_value<-100){money_value=-100;}if(money_value<0){money_value+=100;}fltchr.flt=money_value+50;for(ii=0;ii<4;ii++){Write_Consume_Data[ii]=fltchr.chr[ii];}//status=PcdWrite(4,&Write_Consume_Data[0]);for(ii=0;ii<16;ii++) //向塊4寫入初始數值{Write_First_Data[ii]=0xaa;}status=PcdWrite(4,&Write_First_Data[0]); //if(status!=MI_OK){bWarn=1;return;} ShowFloat816(2,5,50.00);ShowFloat816(4,5,fltchr.flt); bPass=1;PcdHalt(); }/*else{status=PcdAuthState(PICC_AUTHENT1A,7,NewKeyA,MLastSelectedSnr);//????KUAI4?if(status!=MI_OK){return;}status=PcdRead(4,Read_Data);if(status!=MI_OK){return;}for(ii=0;ii<4;ii++){fltchr.chr[ii]=Read_Data[ii];} ShowFloat816(4,5,fltchr.flt); PcdHalt(); }*/ }void Warn(void) {uchar data ii;for(ii=0;ii<3;ii++){SET_BEEP;delay_ms(120);CLR_BEEP;delay_ms(120);} }void main(void) {InitAll();//其中調用InitRc522()，通過模擬spi輸出數據初始化rfid模塊#pragma ASMSETB P3.5NOP#pragma ENDASM? ??? ?oprationcard=CONSUME;//剛一上電，是消費模式。之后通過按鍵可以改變模式，并保存在oprationcard變量中while(1){KeyNum=GetKey();// sendchar1(1);if(bMenued){if( (KeyNum==N_1)&&(!KeyTime) )//if(!keytime)<=>if(keytime==0)?? ?//當第一次按下k1時，keytime=0，所以執行之//當第二次按下k1時, 如果此時距第一次按下k1的時間在15個time溢出周期內，不會執行之。否則執行之，{KeyTime=15;TimeShowMenu=0;? //卡片放在上面，從沒有任何按鍵操作算起，超過250個time溢出周期，則會進入welcom頁面，相當于待機時間oprationcard=CONSUME;sendchar1(KeyNum);ShowHZ1616(2,0,4); //消 ?ShowHZ1616(2,2,5); //費?????? ?}else if( (KeyNum==N_2)&&(!KeyTime) ){KeyTime=15;TimeShowMenu=0;oprationcard=ADDMONEY;sendchar1(KeyNum);ShowHZ1616(2,0,6); //充值 ShowHZ1616(2,2,7); //????? ?}else if( (KeyNum==N_3)&&(!KeyTime) ){KeyTime=15;TimeShowMenu=0;oprationcard=REGCARD;sendchar1(KeyNum);ShowHZ1616(2,0,10); //注冊 ShowHZ1616(2,2,11); //????? ?} else if( (KeyNum==N_4)&&(!KeyTime) ){KeyTime=15;TimeShowMenu=0;oprationcard=READCARD;sendchar1(KeyNum);// sendchar1(55);ShowHZ1616(2,0,12); //讀卡ShowHZ1616(2,2,13); //????? ?} ?}???? ?if(bShowWelcome){bShowWelcome=0;bTimed=1;bMenued=0;ShowWelcome(); ?}if(bWarn){bWarn=0;Warn();}if(bPass){bPass=0;Pass();}ctrlprocess();//rc522尋卡讀寫等函數} ? }
rc522.h
/ //MF522命令字 / #define PCD_IDLE 0x00 //取消當前命令 #define PCD_AUTHENT 0x0E //驗證密鑰 #define PCD_RECEIVE 0x08 //接收數據 #define PCD_TRANSMIT 0x04 //發送數據 #define PCD_TRANSCEIVE 0x0C //發送并接收數據 #define PCD_RESETPHASE 0x0F //復位 #define PCD_CALCCRC 0x03 //CRC計算/ //Mifare_One卡片命令字 / #define PICC_REQIDL 0x26 //尋天線區內未進入休眠狀態 #define PICC_REQALL 0x52 //尋天線區內全部卡 #define PICC_ANTICOLL1 0x93 //防沖撞 #define PICC_ANTICOLL2 0x95 //防沖撞 #define PICC_AUTHENT1A 0x60 //驗證A密鑰 #define PICC_AUTHENT1B 0x61 //驗證B密鑰 #define PICC_READ 0x30 //讀塊 #define PICC_WRITE 0xA0 //寫塊 #define PICC_DECREMENT 0xC0 //扣款 #define PICC_INCREMENT 0xC1 //充值 #define PICC_RESTORE 0xC2 //調塊數據到緩沖區 #define PICC_TRANSFER 0xB0 //保存緩沖區中數據 #define PICC_HALT 0x50 //休眠/ //MF522 FIFO長度定義 / #define DEF_FIFO_LENGTH 64 //FIFO size=64byte #define MAXRLEN 18/ //MF522寄存器定義 / // PAGE 0 #define RFU00 0x00 #define CommandReg 0x01 #define ComIEnReg 0x02 #define DivlEnReg 0x03 #define ComIrqReg 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 RFU0F 0x0F // PAGE 1 #define RFU10 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 RFU1A 0x1A #define RFU1B 0x1B #define MifareReg 0x1C #define RFU1D 0x1D #define RFU1E 0x1E #define SerialSpeedReg 0x1F // PAGE 2 #define RFU20 0x20 #define CRCResultRegM 0x21 #define CRCResultRegL 0x22 #define RFU23 0x23 #define ModWidthReg 0x24 #define RFU25 0x25 #define RFCfgReg 0x26 #define GsNReg 0x27 #define CWGsCfgReg 0x28 #define ModGsCfgReg 0x29 #define TModeReg 0x2A #define TPrescalerReg 0x2B #define TReloadRegH 0x2C #define TReloadRegL 0x2D #define TCounterValueRegH 0x2E #define TCounterValueRegL 0x2F // PAGE 3 #define RFU30 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 RFU3C 0x3C #define RFU3D 0x3D #define RFU3E 0x3E #define RFU3F 0x3F/ //和MF522通訊時返回的錯誤代碼 / #define MI_OK 0 #define MI_NOTAGERR (-1) #define MI_ERR (-2)#define SHAQU1 0X01 #define KUAI4 0X04 #define KUAI7 0X07 #define REGCARD 0xa1 #define CONSUME 0xa2 #define READCARD 0xa3 #define ADDMONEY 0xa4sbit spi_cs=P0^5; sbit spi_ck=P0^6; sbit spi_mosi=P0^7; sbit spi_miso=P4^1; sbit spi_rst=P2^7;#define SET_SPI_CS spi_cs=1 #define CLR_SPI_CS spi_cs=0#define SET_SPI_CK spi_ck=1 #define CLR_SPI_CK spi_ck=0#define SET_SPI_MOSI spi_mosi=1 #define CLR_SPI_MOSI spi_mosi=0#define STU_SPI_MISO spi_miso#define SET_RC522RST spi_rst=1 #define CLR_RC522RST spi_rst=0
http://download.csdn.net/detail/songqqnew/3716567

轉載于:https://www.cnblogs.com/-song/archive/2011/10/23/3331945.html

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