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rfid2-micro2440,keil4裸机
發布時間：2024/4/14
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rfid2-micro2440,keil4裸机
小編覺得挺不錯的,現在分享給大家,幫大家做個參考.
將rfid小板移到arm裸機下比較簡單，就把arm當單片機來操作就好了。軟硬兩方面考慮：
硬件上，由于rfid的spi在stc11f32x上本來是模擬出來的，所以在micro2440上也先用模擬的吧(s3c2440a有spi接口先不用了)
在micro2440原理圖上引出如下接口
現在定義
EINT0? MF_SDA(NSS片選)------(GPF0 OUT)
EINT1? MF_SCK(時鐘)-------------(GPF1 OUT)
EINT2? MF_MOSI--------------------(GPF2 OUT)
EINT3? MF_MISO--------------------(GPF3 IN)
EINT4? MF_RST----------------------(GPF4 OUT)
連線如下
軟件上
由于c51的c語言有自己的風格擴展，所以不能直接拷貝上篇單片機的代碼到s3c2440a的工程中，需把c51里的關鍵字刪掉，比如data xdata等等，還有一些比如c51里的位指令，也要轉換成arm的東東才可.
發現keil4下arm的編譯器會將比如char status 默認編譯成unsigned char status,而keil c51的編譯器會將其默認編譯成signed char status,這樣數據類型就混亂了。所以為了保險，我在有符號的變量前都加了signed，無符號變量前加了unsigned
#include "rc522.h" unsigned char? LastKeyA[6]={0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};//NO.2卡，初始密碼 unsigned char? NewKeyA[6]={0x19,0x84,0x07,0x15,0x76,0x14};//NO.2卡，新密碼 unsigned char? NewKey[16]={0x19,0x84,0x07,0x15,0x76,0x14,//注冊用0xff,0x07,0x80,0x69,0x19,0x84,0x07,0x15,0x76,0x14};unsigned char? Read_Data[16]={0x00}; unsigned char? Write_First_Data[16]; unsigned char? Write_Consume_Data[16]; unsigned char? RevBuffer[30]; unsigned char? MLastSelectedSnr[4]; unsigned char? oprationcard;extern signed char PcdReset(void); extern signed char PcdRequest(unsigned char? req_code,unsigned char *pTagType); extern void PcdAntennaOn(void); extern void PcdAntennaOff(void); extern signed char M500PcdConfigISOType(unsigned char? type); extern signed char PcdAnticoll(unsigned char *pSnr); extern signed char PcdSelect(unsigned char *pSnr); extern signed char PcdAuthState(unsigned char? auth_mode,unsigned char? addr,unsigned char *pKey,unsigned char *pSnr); extern signed char PcdWrite(unsigned char? addr,unsigned char *pData); extern signed char PcdRead(unsigned char? addr,unsigned char *pData); extern signed char PcdHalt(void);void InitRc522(void)//初始化rfid模塊 {PcdReset();PcdAntennaOff(); ?PcdAntennaOn();M500PcdConfigISOType( 'A' ); }void ctrlprocess(void)//讀寫函數 {signed char status; int ii;Uart_Printf("\n"); /**********************************************尋卡**************************************************************/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){ Uart_Printf("XXXXXXXXXXXXXXXX沒卡類型\n");return;}Uart_Printf("***********有卡類型\n");/**********************************************返回序列號**************************************************************/status=PcdAnticoll(&RevBuffer[2]);//防沖撞，返回卡的序列號 4字節if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX沒卡序列號\n");return;} Uart_Printf("***********有卡序列號\n");memcpy(MLastSelectedSnr,&RevBuffer[2],4);for(ii=0;ii<4;ii++){Uart_Printf("%x",(MLastSelectedSnr[ii]>>4)&0x0f);Uart_Printf("%x",MLastSelectedSnr[ii]&0x0f);}/**********************************************選卡**************************************************************/memcpy(MLastSelectedSnr,&RevBuffer[2],4);status=PcdSelect(MLastSelectedSnr);//選卡if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX未選中卡\n");return;}Uart_Printf("***********選中卡\n");/**********************************************驗證密碼，扇區1，扇區1的控制塊，地址為7********************************/status=PcdAuthState(PICC_AUTHENT1A,7,NewKeyA,MLastSelectedSnr);//????KUAI4?// 驗證密碼if(status!=MI_OK){ Uart_Printf("XXXXXXXXXXXXXXXX密碼錯誤\n");return;}Uart_Printf("***********密碼正確\n");/**********************************************讀卡，扇區1，扇區1的第一個數據塊，地址為4*******************************/status=PcdRead(4,Read_Data); //讀卡 *********************************************************if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX第一次讀卡失敗\n");// bWarn=1;return;}Uart_Printf("***********第一次讀卡成功,讀到以下數據\n");for(ii=0;ii<4;ii++){fltchr.chr[ii]=Read_Data[ii];Uart_Printf("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);}Uart_Printf("fltchr.flt=%f\n",fltchr.flt);/**********************************************寫卡，扇區1，扇區1的控第一個數據塊，地址為4********************************/fltchr.flt+=0.1;Uart_Printf("寫卡，寫入以下數據\n");Uart_Printf("fltchr.flt=%f\n",fltchr.flt);for(ii=0;ii<4;ii++) {Write_First_Data[ii]=fltchr.chr[ii];Uart_Printf("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);}for(ii=0;ii<4;ii++) Uart_Printf("Write_First_Data[%d]=%x\n",ii,Write_First_Data[ii]); status=PcdWrite(4,&Write_First_Data[0]); //寫卡*********************************if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX寫卡失敗\n") ; Uart_Printf("status=%d\n",status); return;} Uart_Printf("***********寫卡成功\n") ; /**********************************************再次讀卡，扇區1，扇區1的第一個數據塊，地址為4********************************/ status=PcdRead(4,Read_Data); //讀卡 *********************************************************if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX第二次讀卡失敗\n");return;}Uart_Printf("***********第二次讀卡成功，讀到以下數據\n");for(ii=0;ii<4;ii++){fltchr.chr[ii]=Read_Data[ii];Uart_Printf("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);}Uart_Printf("fltchr.flt=%f\n",fltchr.flt);}int main(void)???????????????????? ? {? InitRc522();//初始化必不可少while(1) ctrlprocess();//循環讀卡return 0; }
下面是rc522.c的源碼
//#include "include.h" #include "rc522.h"void ClearBitMask(unsigned char reg,unsigned char mask); void WriteRawRC(unsigned char Address, unsigned char value); void SetBitMask(unsigned char reg,unsigned char mask); signed char PcdComMF522(unsigned char Command, unsigned char *pInData, unsigned char InLenByte,unsigned char *pOutData, unsigned int *pOutLenBit); void CalulateCRC(unsigned char *pIndata,unsigned char len,unsigned char *pOutData); unsigned char ReadRawRC(unsigned char Address); void PcdAntennaOn(void);void delay_ns(unsigned int ns) {unsigned int i;for(i=0;i<ns;i++){// nop();// nop();// nop();} } void spi_delay(int x) {while(x--){;} } void nop( ) { int x=2;while(x--){;} } //------------------------------------------ /* 在下降沿，主機從機同時去向對自己而言是輸出的腳寫數據： 即主機向mosi腳寫數據 即從機向miso腳寫數據在上升沿，主機從機同時都會從對自己而言是輸入的腳去讀數據： 即主機從mosi腳讀數據 即從機從miso腳讀數據*/ unsigned char SPIReadByte(void) {unsigned char? SPICount;?????????????????????????????????????? // Counter used to clock out the dataunsigned char? SPIData;???????????????? ?SPIData = 0;for (SPICount = 0; SPICount < 8; SPICount++)????????????????? // Prepare to clock in the data to be read{SPIData <<=1;?????????????????????????????????????????????? // Rotate the dataCLR_SPI_CK;? nop();nop();? ?//輸出下降沿，從機會在收到下降沿信號后向miso上寫數據。nop();nop()是為了給從機留一點寫數據的時間。//理論上輸出下降沿后，此時主機也可以向mosi上寫數據。但是這個系統沒用到這個功能，所以就不去寫了，所以是半雙工。if(STU_SPI_MISO)?? ?//從mosi上讀數據{SPIData|=0x01;}SET_SPI_CK;?? nop();nop(); //輸出上升沿 ，表明主機要去miso讀數據。 //理論上輸出上升沿后，從機也可以去mosi讀數據，但是在上一步主機沒寫，所以就讀不到了。所以是半雙工。//先SET_SPI_CK或者先去讀數據均可，因為對主機而言SET_SPI_CK沒什么意義，只是為了下一次可以拉低而拉高的。對從機而言SET_SPI_CK有意義但是//從機此時讀的數據是沒意義的或者讀不到數據。}??? ?Uart_Printf("RRRRR+++++++++++++++ in spi read,RXdata=%d\n",SPIData);???????????????????????????????????????????????????????? // and loop backreturn (SPIData);????????????????????????????? // Finally return the read data} //------------------------------------------ // //------------------------------------------ void SPIWriteByte(unsigned char? SPIData) {unsigned char? SPICount;?????????????????????????????????????? // Counter used to clock out the datafor (SPICount = 0; SPICount < 8; SPICount++){CLR_SPI_CK;nop();nop();?? ?//輸出下降沿，然后主機再輸出數據到mosi。//理論上輸出下降沿后，此時從機也可以輸出數據到mosi。此時主機不用管mosi的輸出。所以是半雙工。if (SPIData & 0x80){SET_SPI_MOSI;?? ?? //spi_mosi 寫出一位 }else{CLR_SPI_MOSI;} nop();nop();?? ? //spi_ck 時序操作 SET_SPI_CK;nop();nop();?? ? //輸出數據后，就輸出上升沿。從機會在收到上升沿信號時去mosi讀數據。而此時數據已經被arm寫在了mosi.//理論上輸出上升沿后，主機也可以去miso讀數據，但從機可能沒向miso輸出數據。不用管。所以是半雙工。SPIData <<= 1;}???????? ?Uart_Printf("WWWWW in spi write,data=%d\n",SPIData); }???? /* 所以不管是讀還是寫，主機端的時序操作都可以總結為1.時鐘拉低 2.延時一會 3.向mosi寫數據or從miso讀數據 4.時鐘拉高 5.8次以內跳到1 */ / //功 能：尋卡 //參數說明: req_code[IN]:尋卡方式 // 0x52 = 尋感應區內所有符合14443A標準的卡 // 0x26 = 尋未進入休眠狀態的卡 // pTagType[OUT]：卡片類型代碼 // 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 / signed char PcdRequest(unsigned char req_code,unsigned char *pTagType) {signed char status; unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; ClearBitMask(Status2Reg,0x08);WriteRawRC(BitFramingReg,0x07);SetBitMask(TxControlReg,0x03);ucComMF522Buf[0] = req_code;status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);if ((status == MI_OK) && (unLen == 0x10)){ *pTagType = ucComMF522Buf[0];*(pTagType+1) = ucComMF522Buf[1];}else{ status = MI_ERR; }return status; }/ //功 能：防沖撞 //參數說明: pSnr[OUT]:卡片序列號，4字節 //返 回: 成功返回MI_OK / signed char PcdAnticoll(unsigned char *pSnr) {signed 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：選定卡片 //參數說明: pSnr[IN]:卡片序列號，4字節 //返 回: 成功返回MI_OK / signed char PcdSelect(unsigned char *pSnr) {signed 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：驗證卡片密碼 //參數說明: auth_mode[IN]: 密碼驗證模式 // 0x60 = 驗證A密鑰 // 0x61 = 驗證B密鑰 // addr[IN]：塊地址 // pKey[IN]：密碼 // pSnr[IN]：卡片序列號，4字節 //返 回: 成功返回MI_OK / signed char PcdAuthState(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr) {signed 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：讀取M1卡一塊數據 //參數說明: addr[IN]：塊地址 // pData[OUT]：讀出的數據，16字節 //返 回: 成功返回MI_OK / signed char PcdRead(unsigned char addr,unsigned char *pData) {signed 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：寫數據到M1卡一塊 //參數說明: addr[IN]：塊地址 // pData[IN]：寫入的數據，16字節 //返 回: 成功返回MI_OK / signed char PcdWrite(unsigned char addr,unsigned char *pData) {signed 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：命令卡片進入休眠狀態 //返 回: 成功返回MI_OK / signed char PcdHalt(void) {signed char status;unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_HALT;ucComMF522Buf[1] = 0;CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);return MI_OK; }/ //用MF522計算CRC16函數 / 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：復位RC522 //返 回: 成功返回MI_OK / signed char PcdReset(void) {//PORTD|=(1<<RC522RST);SET_RC522RST;delay_ns(10); /******************************************************************delay_ns********************************///PORTD&=~(1<<RC522RST);CLR_RC522RST;delay_ns(10);//PORTD|=(1<<RC522RST);SET_RC522RST;delay_ns(10);WriteRawRC(CommandReg,PCD_RESETPHASE);delay_ns(10);WriteRawRC(ModeReg,0x3D); //和Mifare卡通訊，CRC初始值0x6363WriteRawRC(TReloadRegL,30); WriteRawRC(TReloadRegH,0);WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);WriteRawRC(TxAutoReg,0x40);//必須要return MI_OK; } // //設置RC632的工作方式 // signed char M500PcdConfigISOType(unsigned char type) {if (type == 'A') //ISO14443_A{ ClearBitMask(Status2Reg,0x08);WriteRawRC(ModeReg,0x3D);//3FWriteRawRC(RxSelReg,0x86);//84WriteRawRC(RFCfgReg,0x7F); //4FWriteRawRC(TReloadRegL,30);//tmoLength);// TReloadVal = 'h6a =tmoLength(dec) WriteRawRC(TReloadRegH,0);WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);delay_ns(1000);PcdAntennaOn();}else{ return -1; }return MI_OK; }//讀寫寄存器/ //功 能：讀RC632寄存器 //參數說明：Address[IN]:寄存器地址 //返 回：讀出的值 / unsigned char ReadRawRC(unsigned char Address) {unsigned char ucAddr;unsigned char ucResult=0;CLR_SPI_CS;ucAddr = ((Address<<1)&0x7E)|0x80;SPIWriteByte(ucAddr);ucResult=SPIReadByte();SET_SPI_CS;return ucResult; }/ //功 能：寫RC632寄存器 //參數說明：Address[IN]:寄存器地址 // value[IN]:寫入的值 / void WriteRawRC(unsigned char Address, unsigned char value) { unsigned char ucAddr;CLR_SPI_CS;ucAddr = ((Address<<1)&0x7E);SPIWriteByte(ucAddr);SPIWriteByte(value);SET_SPI_CS; }//直接調用讀寫寄存器的函數進行操作寄存器，這些函數又被其他函數調用實現各種功能/ //功 能：置RC522寄存器位 //參數說明：reg[IN]:寄存器地址 // mask[IN]:置位值 / void SetBitMask(unsigned char reg,unsigned char mask) {signed char tmp = 0x0;tmp = ReadRawRC(reg);WriteRawRC(reg,tmp | mask); // set bit mask }/ //功 能：清RC522寄存器位 //參數說明：reg[IN]:寄存器地址 // mask[IN]:清位值 / void ClearBitMask(unsigned char reg,unsigned char mask) {signed char tmp = 0x0;tmp = ReadRawRC(reg);WriteRawRC(reg, tmp & ~mask); // clear bit mask } / //功 能：通過RC522和ISO14443卡通訊 ，通過設置commandreg的值讓pcd執行不同的命令，來與picc傳遞數據 //參數說明：Command[IN]:RC522命令字 // pInData[IN]:通過RC522發送到卡片的數據 // InLenByte[IN]:發送數據的字節長度 // pOutData[OUT]:接收到的卡片返回數據 // *pOutLenBit[OUT]:返回數據的位長度 / signed char PcdComMF522(unsigned char Command, unsigned char *pInData, unsigned char InLenByte,unsigned char *pOutData, unsigned int *pOutLenBit) {signed 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;//根據時鐘頻率調整，操作M1卡最大等待時間25msi = 2000; //mcu已經將命令字寫入rc522的commandreg,參數寫入了FIFODataReg，rc522正在執行commandreg里的命令從mifare卡中取得相應的數據，//在rc522還未取得數據的時候，mcu等待一下,最多只需等待25ms，之后//mcu再去讀取rc522的FIFODataReg即可讀到 .如果在一個較快的mcu中，可以增大i值，以使等待時間延長一點，否則可能讀取失敗。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; }/ //開啟天線 //每次啟動或關閉天險發射之間應至少有1ms的間隔 / void PcdAntennaOn(void) {unsigned char i;i = ReadRawRC(TxControlReg);if (!(i & 0x03)){SetBitMask(TxControlReg, 0x03);} }/ //關閉天線 / void PcdAntennaOff(void) {ClearBitMask(TxControlReg, 0x03); }/ //功 能：扣款和充值 //參數說明: dd_mode[IN]：命令字 // 0xC0 = 扣款 // 0xC1 = 充值 // addr[IN]：錢包地址 // pValue[IN]：4字節增(減)值，低位在前 //返 回: 成功返回MI_OK / /*signed char PcdValue(unsigned char dd_mode,unsigned char addr,unsigned char *pValue) {signed char status;unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; //unsigned char i;ucComMF522Buf[0] = dd_mode;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, pValue, 4);//for (i=0; i<16; i++)//{ ucComMF522Buf[i] = *(pValue+i); }CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);unLen = 0;status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);if (status != MI_ERR){ status = MI_OK; }}if (status == MI_OK){ucComMF522Buf[0] = PICC_TRANSFER;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; }}return status; }*// //功 能：備份錢包 //參數說明: sourceaddr[IN]：源地址 // goaladdr[IN]：目標地址 //返 回: 成功返回MI_OK / /*signed char PcdBakValue(unsigned char sourceaddr, unsigned char goaladdr) {signed char status;unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_RESTORE;ucComMF522Buf[1] = sourceaddr;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){ucComMF522Buf[0] = 0;ucComMF522Buf[1] = 0;ucComMF522Buf[2] = 0;ucComMF522Buf[3] = 0;CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);if (status != MI_ERR){ status = MI_OK; }}if (status != MI_OK){ return MI_ERR; }ucComMF522Buf[0] = PICC_TRANSFER;ucComMF522Buf[1] = goaladdr;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; }return status; }*/rc522.c中需要注意的是對spi操作的時序問題，
micro2440在板晶振12MHZ，設置分后后FCLK=400MHZ，PCLK=50MHZ
而原板stc11f32所載晶振18.432MHZ,但此單片機是每機器周期1個震蕩周期(晶振頻率倒數)，而一般的c51單片機是每機器周期12個振動周期。指令周期為若干機器周期。
下面是rc522.h
#include "2440addr.h" / //MF522命令字 一般是寫入rc522的commandreg，rc522認識這命令代碼，可以執行之而對卡片適當操作 / #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，一般是寫入rc522的FIFODataReg中，rc522自動將其壓入fifo,這些命令字mifare卡認識，可以執行之，以響應rc522 //mcu在將MF522命令字寫入commandreg之前，應先把Mifare_One卡片命令字和該命令字需要的其他參數按照約定的格式寫入FIFODataReg //，因為一旦commandreg中有命令rc522就會執行，并且到fifo //中尋找參數，所以其參數應該先放到fifo中。//Mifare_One卡片命令字一般是在main.c中由函數參數直接指定，表示要卡片執行什么動作，而實際上要卡片執行什么動作，只有rc522才能去下命令， / #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 0xa4/* sbit 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 */#define SET_SPI_CS (rGPFDAT |=(1<<0));//片選腳輸出1，gpfdat bit0=1 #define CLR_SPI_CS (rGPFDAT &=~(1<<0));//片選腳輸出0, gpfdat bit0=0#define SET_SPI_CK (rGPFDAT |=(1<<1));//時鐘腳輸出1，gpfdat bit1=1 #define CLR_SPI_CK (rGPFDAT &=~(1<<1));//時鐘腳輸出0, gpfdat bit1=0#define SET_SPI_MOSI (rGPFDAT |=(1<<2));//主機mosi腳輸出1，gpfdat bit2=1 #define CLR_SPI_MOSI (rGPFDAT &=~(1<<2));//主機mosi腳輸出0, gpfdat bit2=0#define STU_SPI_MISO ((rGPFDAT >>3)&1) //取miso腳一位數據 ，gpfdat bit3#define SET_RC522RST (rGPFDAT |=(1<<4));//復位腳輸出1，gpfdat bit4=1 #define CLR_RC522RST (rGPFDAT &=~(1<<4));//復位腳輸出0, gpfdat bit4=0在rc522.h中值的注意的是，最后這些置1 清0的宏，在c51下可以用位指令直接操作如注釋掉的那些，但是arm中不能位尋址，要用與或指令去操作整個寄存器才能達到相同的目的。
http://download.csdn.net/detail/songqqnew/3716580
硬件上，由于rfid的spi在stc11f32x上本來是模擬出來的，所以在micro2440上也先用模擬的吧(s3c2440a有spi接口先不用了)
在micro2440原理圖上引出如下接口
現在定義
EINT0? MF_SDA(NSS片選)------(GPF0 OUT)
EINT1? MF_SCK(時鐘)-------------(GPF1 OUT)
EINT2? MF_MOSI--------------------(GPF2 OUT)
EINT3? MF_MISO--------------------(GPF3 IN)
EINT4? MF_RST----------------------(GPF4 OUT)
連線如下
軟件上
由于c51的c語言有自己的風格擴展，所以不能直接拷貝上篇單片機的代碼到s3c2440a的工程中，需把c51里的關鍵字刪掉，比如data xdata等等，還有一些比如c51里的位指令，也要轉換成arm的東東才可.
發現keil4下arm的編譯器會將比如char status 默認編譯成unsigned char status,而keil c51的編譯器會將其默認編譯成signed char status,這樣數據類型就混亂了。所以為了保險，我在有符號的變量前都加了signed，無符號變量前加了unsigned
#include "rc522.h" unsigned char? LastKeyA[6]={0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};//NO.2卡，初始密碼 unsigned char? NewKeyA[6]={0x19,0x84,0x07,0x15,0x76,0x14};//NO.2卡，新密碼 unsigned char? NewKey[16]={0x19,0x84,0x07,0x15,0x76,0x14,//注冊用0xff,0x07,0x80,0x69,0x19,0x84,0x07,0x15,0x76,0x14};unsigned char? Read_Data[16]={0x00}; unsigned char? Write_First_Data[16]; unsigned char? Write_Consume_Data[16]; unsigned char? RevBuffer[30]; unsigned char? MLastSelectedSnr[4]; unsigned char? oprationcard;extern signed char PcdReset(void); extern signed char PcdRequest(unsigned char? req_code,unsigned char *pTagType); extern void PcdAntennaOn(void); extern void PcdAntennaOff(void); extern signed char M500PcdConfigISOType(unsigned char? type); extern signed char PcdAnticoll(unsigned char *pSnr); extern signed char PcdSelect(unsigned char *pSnr); extern signed char PcdAuthState(unsigned char? auth_mode,unsigned char? addr,unsigned char *pKey,unsigned char *pSnr); extern signed char PcdWrite(unsigned char? addr,unsigned char *pData); extern signed char PcdRead(unsigned char? addr,unsigned char *pData); extern signed char PcdHalt(void);void InitRc522(void)//初始化rfid模塊 {PcdReset();PcdAntennaOff(); ?PcdAntennaOn();M500PcdConfigISOType( 'A' ); }void ctrlprocess(void)//讀寫函數 {signed char status; int ii;Uart_Printf("\n"); /**********************************************尋卡**************************************************************/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){ Uart_Printf("XXXXXXXXXXXXXXXX沒卡類型\n");return;}Uart_Printf("***********有卡類型\n");/**********************************************返回序列號**************************************************************/status=PcdAnticoll(&RevBuffer[2]);//防沖撞，返回卡的序列號 4字節if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX沒卡序列號\n");return;} Uart_Printf("***********有卡序列號\n");memcpy(MLastSelectedSnr,&RevBuffer[2],4);for(ii=0;ii<4;ii++){Uart_Printf("%x",(MLastSelectedSnr[ii]>>4)&0x0f);Uart_Printf("%x",MLastSelectedSnr[ii]&0x0f);}/**********************************************選卡**************************************************************/memcpy(MLastSelectedSnr,&RevBuffer[2],4);status=PcdSelect(MLastSelectedSnr);//選卡if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX未選中卡\n");return;}Uart_Printf("***********選中卡\n");/**********************************************驗證密碼，扇區1，扇區1的控制塊，地址為7********************************/status=PcdAuthState(PICC_AUTHENT1A,7,NewKeyA,MLastSelectedSnr);//????KUAI4?// 驗證密碼if(status!=MI_OK){ Uart_Printf("XXXXXXXXXXXXXXXX密碼錯誤\n");return;}Uart_Printf("***********密碼正確\n");/**********************************************讀卡，扇區1，扇區1的第一個數據塊，地址為4*******************************/status=PcdRead(4,Read_Data); //讀卡 *********************************************************if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX第一次讀卡失敗\n");// bWarn=1;return;}Uart_Printf("***********第一次讀卡成功,讀到以下數據\n");for(ii=0;ii<4;ii++){fltchr.chr[ii]=Read_Data[ii];Uart_Printf("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);}Uart_Printf("fltchr.flt=%f\n",fltchr.flt);/**********************************************寫卡，扇區1，扇區1的控第一個數據塊，地址為4********************************/fltchr.flt+=0.1;Uart_Printf("寫卡，寫入以下數據\n");Uart_Printf("fltchr.flt=%f\n",fltchr.flt);for(ii=0;ii<4;ii++) {Write_First_Data[ii]=fltchr.chr[ii];Uart_Printf("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);}for(ii=0;ii<4;ii++) Uart_Printf("Write_First_Data[%d]=%x\n",ii,Write_First_Data[ii]); status=PcdWrite(4,&Write_First_Data[0]); //寫卡*********************************if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX寫卡失敗\n") ; Uart_Printf("status=%d\n",status); return;} Uart_Printf("***********寫卡成功\n") ; /**********************************************再次讀卡，扇區1，扇區1的第一個數據塊，地址為4********************************/ status=PcdRead(4,Read_Data); //讀卡 *********************************************************if(status!=MI_OK){Uart_Printf("XXXXXXXXXXXXXXXX第二次讀卡失敗\n");return;}Uart_Printf("***********第二次讀卡成功，讀到以下數據\n");for(ii=0;ii<4;ii++){fltchr.chr[ii]=Read_Data[ii];Uart_Printf("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);}Uart_Printf("fltchr.flt=%f\n",fltchr.flt);}int main(void)???????????????????? ? {? InitRc522();//初始化必不可少while(1) ctrlprocess();//循環讀卡return 0; }
下面是rc522.c的源碼
//#include "include.h" #include "rc522.h"void ClearBitMask(unsigned char reg,unsigned char mask); void WriteRawRC(unsigned char Address, unsigned char value); void SetBitMask(unsigned char reg,unsigned char mask); signed char PcdComMF522(unsigned char Command, unsigned char *pInData, unsigned char InLenByte,unsigned char *pOutData, unsigned int *pOutLenBit); void CalulateCRC(unsigned char *pIndata,unsigned char len,unsigned char *pOutData); unsigned char ReadRawRC(unsigned char Address); void PcdAntennaOn(void);void delay_ns(unsigned int ns) {unsigned int i;for(i=0;i<ns;i++){// nop();// nop();// nop();} } void spi_delay(int x) {while(x--){;} } void nop( ) { int x=2;while(x--){;} } //------------------------------------------ /* 在下降沿，主機從機同時去向對自己而言是輸出的腳寫數據： 即主機向mosi腳寫數據 即從機向miso腳寫數據在上升沿，主機從機同時都會從對自己而言是輸入的腳去讀數據： 即主機從mosi腳讀數據 即從機從miso腳讀數據*/ unsigned char SPIReadByte(void) {unsigned char? SPICount;?????????????????????????????????????? // Counter used to clock out the dataunsigned char? SPIData;???????????????? ?SPIData = 0;for (SPICount = 0; SPICount < 8; SPICount++)????????????????? // Prepare to clock in the data to be read{SPIData <<=1;?????????????????????????????????????????????? // Rotate the dataCLR_SPI_CK;? nop();nop();? ?//輸出下降沿，從機會在收到下降沿信號后向miso上寫數據。nop();nop()是為了給從機留一點寫數據的時間。//理論上輸出下降沿后，此時主機也可以向mosi上寫數據。但是這個系統沒用到這個功能，所以就不去寫了，所以是半雙工。if(STU_SPI_MISO)?? ?//從mosi上讀數據{SPIData|=0x01;}SET_SPI_CK;?? nop();nop(); //輸出上升沿 ，表明主機要去miso讀數據。 //理論上輸出上升沿后，從機也可以去mosi讀數據，但是在上一步主機沒寫，所以就讀不到了。所以是半雙工。//先SET_SPI_CK或者先去讀數據均可，因為對主機而言SET_SPI_CK沒什么意義，只是為了下一次可以拉低而拉高的。對從機而言SET_SPI_CK有意義但是//從機此時讀的數據是沒意義的或者讀不到數據。}??? ?Uart_Printf("RRRRR+++++++++++++++ in spi read,RXdata=%d\n",SPIData);???????????????????????????????????????????????????????? // and loop backreturn (SPIData);????????????????????????????? // Finally return the read data} //------------------------------------------ // //------------------------------------------ void SPIWriteByte(unsigned char? SPIData) {unsigned char? SPICount;?????????????????????????????????????? // Counter used to clock out the datafor (SPICount = 0; SPICount < 8; SPICount++){CLR_SPI_CK;nop();nop();?? ?//輸出下降沿，然后主機再輸出數據到mosi。//理論上輸出下降沿后，此時從機也可以輸出數據到mosi。此時主機不用管mosi的輸出。所以是半雙工。if (SPIData & 0x80){SET_SPI_MOSI;?? ?? //spi_mosi 寫出一位 }else{CLR_SPI_MOSI;} nop();nop();?? ? //spi_ck 時序操作 SET_SPI_CK;nop();nop();?? ? //輸出數據后，就輸出上升沿。從機會在收到上升沿信號時去mosi讀數據。而此時數據已經被arm寫在了mosi.//理論上輸出上升沿后，主機也可以去miso讀數據，但從機可能沒向miso輸出數據。不用管。所以是半雙工。SPIData <<= 1;}???????? ?Uart_Printf("WWWWW in spi write,data=%d\n",SPIData); }???? /* 所以不管是讀還是寫，主機端的時序操作都可以總結為1.時鐘拉低 2.延時一會 3.向mosi寫數據or從miso讀數據 4.時鐘拉高 5.8次以內跳到1 */ / //功 能：尋卡 //參數說明: req_code[IN]:尋卡方式 // 0x52 = 尋感應區內所有符合14443A標準的卡 // 0x26 = 尋未進入休眠狀態的卡 // pTagType[OUT]：卡片類型代碼 // 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 / signed char PcdRequest(unsigned char req_code,unsigned char *pTagType) {signed char status; unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; ClearBitMask(Status2Reg,0x08);WriteRawRC(BitFramingReg,0x07);SetBitMask(TxControlReg,0x03);ucComMF522Buf[0] = req_code;status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);if ((status == MI_OK) && (unLen == 0x10)){ *pTagType = ucComMF522Buf[0];*(pTagType+1) = ucComMF522Buf[1];}else{ status = MI_ERR; }return status; }/ //功 能：防沖撞 //參數說明: pSnr[OUT]:卡片序列號，4字節 //返 回: 成功返回MI_OK / signed char PcdAnticoll(unsigned char *pSnr) {signed 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：選定卡片 //參數說明: pSnr[IN]:卡片序列號，4字節 //返 回: 成功返回MI_OK / signed char PcdSelect(unsigned char *pSnr) {signed 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：驗證卡片密碼 //參數說明: auth_mode[IN]: 密碼驗證模式 // 0x60 = 驗證A密鑰 // 0x61 = 驗證B密鑰 // addr[IN]：塊地址 // pKey[IN]：密碼 // pSnr[IN]：卡片序列號，4字節 //返 回: 成功返回MI_OK / signed char PcdAuthState(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr) {signed 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：讀取M1卡一塊數據 //參數說明: addr[IN]：塊地址 // pData[OUT]：讀出的數據，16字節 //返 回: 成功返回MI_OK / signed char PcdRead(unsigned char addr,unsigned char *pData) {signed 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：寫數據到M1卡一塊 //參數說明: addr[IN]：塊地址 // pData[IN]：寫入的數據，16字節 //返 回: 成功返回MI_OK / signed char PcdWrite(unsigned char addr,unsigned char *pData) {signed 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：命令卡片進入休眠狀態 //返 回: 成功返回MI_OK / signed char PcdHalt(void) {signed char status;unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_HALT;ucComMF522Buf[1] = 0;CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);return MI_OK; }/ //用MF522計算CRC16函數 / 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：復位RC522 //返 回: 成功返回MI_OK / signed char PcdReset(void) {//PORTD|=(1<<RC522RST);SET_RC522RST;delay_ns(10); /******************************************************************delay_ns********************************///PORTD&=~(1<<RC522RST);CLR_RC522RST;delay_ns(10);//PORTD|=(1<<RC522RST);SET_RC522RST;delay_ns(10);WriteRawRC(CommandReg,PCD_RESETPHASE);delay_ns(10);WriteRawRC(ModeReg,0x3D); //和Mifare卡通訊，CRC初始值0x6363WriteRawRC(TReloadRegL,30); WriteRawRC(TReloadRegH,0);WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);WriteRawRC(TxAutoReg,0x40);//必須要return MI_OK; } // //設置RC632的工作方式 // signed char M500PcdConfigISOType(unsigned char type) {if (type == 'A') //ISO14443_A{ ClearBitMask(Status2Reg,0x08);WriteRawRC(ModeReg,0x3D);//3FWriteRawRC(RxSelReg,0x86);//84WriteRawRC(RFCfgReg,0x7F); //4FWriteRawRC(TReloadRegL,30);//tmoLength);// TReloadVal = 'h6a =tmoLength(dec) WriteRawRC(TReloadRegH,0);WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);delay_ns(1000);PcdAntennaOn();}else{ return -1; }return MI_OK; }//讀寫寄存器/ //功 能：讀RC632寄存器 //參數說明：Address[IN]:寄存器地址 //返 回：讀出的值 / unsigned char ReadRawRC(unsigned char Address) {unsigned char ucAddr;unsigned char ucResult=0;CLR_SPI_CS;ucAddr = ((Address<<1)&0x7E)|0x80;SPIWriteByte(ucAddr);ucResult=SPIReadByte();SET_SPI_CS;return ucResult; }/ //功 能：寫RC632寄存器 //參數說明：Address[IN]:寄存器地址 // value[IN]:寫入的值 / void WriteRawRC(unsigned char Address, unsigned char value) { unsigned char ucAddr;CLR_SPI_CS;ucAddr = ((Address<<1)&0x7E);SPIWriteByte(ucAddr);SPIWriteByte(value);SET_SPI_CS; }//直接調用讀寫寄存器的函數進行操作寄存器，這些函數又被其他函數調用實現各種功能/ //功 能：置RC522寄存器位 //參數說明：reg[IN]:寄存器地址 // mask[IN]:置位值 / void SetBitMask(unsigned char reg,unsigned char mask) {signed char tmp = 0x0;tmp = ReadRawRC(reg);WriteRawRC(reg,tmp | mask); // set bit mask }/ //功 能：清RC522寄存器位 //參數說明：reg[IN]:寄存器地址 // mask[IN]:清位值 / void ClearBitMask(unsigned char reg,unsigned char mask) {signed char tmp = 0x0;tmp = ReadRawRC(reg);WriteRawRC(reg, tmp & ~mask); // clear bit mask } / //功 能：通過RC522和ISO14443卡通訊 ，通過設置commandreg的值讓pcd執行不同的命令，來與picc傳遞數據 //參數說明：Command[IN]:RC522命令字 // pInData[IN]:通過RC522發送到卡片的數據 // InLenByte[IN]:發送數據的字節長度 // pOutData[OUT]:接收到的卡片返回數據 // *pOutLenBit[OUT]:返回數據的位長度 / signed char PcdComMF522(unsigned char Command, unsigned char *pInData, unsigned char InLenByte,unsigned char *pOutData, unsigned int *pOutLenBit) {signed 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;//根據時鐘頻率調整，操作M1卡最大等待時間25msi = 2000; //mcu已經將命令字寫入rc522的commandreg,參數寫入了FIFODataReg，rc522正在執行commandreg里的命令從mifare卡中取得相應的數據，//在rc522還未取得數據的時候，mcu等待一下,最多只需等待25ms，之后//mcu再去讀取rc522的FIFODataReg即可讀到 .如果在一個較快的mcu中，可以增大i值，以使等待時間延長一點，否則可能讀取失敗。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; }/ //開啟天線 //每次啟動或關閉天險發射之間應至少有1ms的間隔 / void PcdAntennaOn(void) {unsigned char i;i = ReadRawRC(TxControlReg);if (!(i & 0x03)){SetBitMask(TxControlReg, 0x03);} }/ //關閉天線 / void PcdAntennaOff(void) {ClearBitMask(TxControlReg, 0x03); }/ //功 能：扣款和充值 //參數說明: dd_mode[IN]：命令字 // 0xC0 = 扣款 // 0xC1 = 充值 // addr[IN]：錢包地址 // pValue[IN]：4字節增(減)值，低位在前 //返 回: 成功返回MI_OK / /*signed char PcdValue(unsigned char dd_mode,unsigned char addr,unsigned char *pValue) {signed char status;unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; //unsigned char i;ucComMF522Buf[0] = dd_mode;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, pValue, 4);//for (i=0; i<16; i++)//{ ucComMF522Buf[i] = *(pValue+i); }CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);unLen = 0;status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);if (status != MI_ERR){ status = MI_OK; }}if (status == MI_OK){ucComMF522Buf[0] = PICC_TRANSFER;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; }}return status; }*// //功 能：備份錢包 //參數說明: sourceaddr[IN]：源地址 // goaladdr[IN]：目標地址 //返 回: 成功返回MI_OK / /*signed char PcdBakValue(unsigned char sourceaddr, unsigned char goaladdr) {signed char status;unsigned int unLen;unsigned char ucComMF522Buf[MAXRLEN]; ucComMF522Buf[0] = PICC_RESTORE;ucComMF522Buf[1] = sourceaddr;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){ucComMF522Buf[0] = 0;ucComMF522Buf[1] = 0;ucComMF522Buf[2] = 0;ucComMF522Buf[3] = 0;CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);if (status != MI_ERR){ status = MI_OK; }}if (status != MI_OK){ return MI_ERR; }ucComMF522Buf[0] = PICC_TRANSFER;ucComMF522Buf[1] = goaladdr;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; }return status; }*/rc522.c中需要注意的是對spi操作的時序問題，
micro2440在板晶振12MHZ，設置分后后FCLK=400MHZ，PCLK=50MHZ
而原板stc11f32所載晶振18.432MHZ,但此單片機是每機器周期1個震蕩周期(晶振頻率倒數)，而一般的c51單片機是每機器周期12個振動周期。指令周期為若干機器周期。
下面是rc522.h
#include "2440addr.h" / //MF522命令字 一般是寫入rc522的commandreg，rc522認識這命令代碼，可以執行之而對卡片適當操作 / #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，一般是寫入rc522的FIFODataReg中，rc522自動將其壓入fifo,這些命令字mifare卡認識，可以執行之，以響應rc522 //mcu在將MF522命令字寫入commandreg之前，應先把Mifare_One卡片命令字和該命令字需要的其他參數按照約定的格式寫入FIFODataReg //，因為一旦commandreg中有命令rc522就會執行，并且到fifo //中尋找參數，所以其參數應該先放到fifo中。//Mifare_One卡片命令字一般是在main.c中由函數參數直接指定，表示要卡片執行什么動作，而實際上要卡片執行什么動作，只有rc522才能去下命令， / #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 0xa4/* sbit 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 */#define SET_SPI_CS (rGPFDAT |=(1<<0));//片選腳輸出1，gpfdat bit0=1 #define CLR_SPI_CS (rGPFDAT &=~(1<<0));//片選腳輸出0, gpfdat bit0=0#define SET_SPI_CK (rGPFDAT |=(1<<1));//時鐘腳輸出1，gpfdat bit1=1 #define CLR_SPI_CK (rGPFDAT &=~(1<<1));//時鐘腳輸出0, gpfdat bit1=0#define SET_SPI_MOSI (rGPFDAT |=(1<<2));//主機mosi腳輸出1，gpfdat bit2=1 #define CLR_SPI_MOSI (rGPFDAT &=~(1<<2));//主機mosi腳輸出0, gpfdat bit2=0#define STU_SPI_MISO ((rGPFDAT >>3)&1) //取miso腳一位數據 ，gpfdat bit3#define SET_RC522RST (rGPFDAT |=(1<<4));//復位腳輸出1，gpfdat bit4=1 #define CLR_RC522RST (rGPFDAT &=~(1<<4));//復位腳輸出0, gpfdat bit4=0在rc522.h中值的注意的是，最后這些置1 清0的宏，在c51下可以用位指令直接操作如注釋掉的那些，但是arm中不能位尋址，要用與或指令去操作整個寄存器才能達到相同的目的。
http://download.csdn.net/detail/songqqnew/3716580
轉載于:https://www.cnblogs.com/-song/archive/2011/10/23/3331944.html
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