RFID-RC522是一个淘宝上比较常见的一个识别RFID的一个模块。他可以做到对RFID的读写。MF RC522 是应用于13.56MHz 非接触式通信中高集成度读写卡系列芯片中的一员。是NXP公司针对“三表”应用推出的一款低电压、低成本、体积小的非接触式读写卡芯片,是智能仪表和便携 式手持设备研发的较好选择 ##RFID读写卡的过程 读写卡主要有五个步骤:寻卡,防冲突,选卡,认证,读/写卡。 ###寻卡 - <font face="微软雅黑" size="3">// REQ_ALL代表寻天线区内所有卡,TagType为返回的卡的类型
- status= PcdRequest( REQ_ALL , TagType );</font>
复制代码TagType返回的卡类型有: 0x4400 = Mifare_UltraLight 0x0400 = Mifare_One(S50) 0x0200 = Mifare_One(S70) 0x0800 = Mifare_Pro(X) 0x4403 = Mifare_DESFire ###防冲突 - <font face="微软雅黑" size="3">
- if(!status)
- {
- status = PcdAnticoll(SelectedSnr);
- // ......
- }</font>
复制代码###认证 - <font face="微软雅黑" size="3">if(!status)
- {
- // 认证
- snr = 1; // 扇区号1
- status = PcdAuthState(KEYA, (snr*4+3), DefaultKey, SelectedSnr); // 校验1扇区密码,密码位于每一扇区第3块
- // ......
- }</font>
复制代码四个参数分别是:验证A密钥,块地址,扇区密码,卡序列号 ###读写卡 - <font face="微软雅黑" size="3">
- if(!status)
- {
- //读写卡
- 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), "way2"); // 写卡,将buf[0]-buf[16]写入1扇区0块
- if(!status)
- {
- //读写成功
- printf("read finish!\n");
- printf("读到的值是: %s\n",buf);
- WaitCardOff();
- }
- </font>
复制代码##代码 以下为核心代码: main.c - <font face="微软雅黑" size="3">
- #include "stm32f10x.h"
- #include "delay.h"
- #include "bsp_usart.h"
- #include "RC522.h"
-
- int main()
- {
- char status;
- unsigned char snr, buf[16], TagType[2], SelectedSnr[4], DefaultKey[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
-
- delay_init();
- usart_init();
-
- PcdInit();
- PcdReset();
- PcdAntennaOff();
- PcdAntennaOn();
- M500PcdConfigISOType( 'A' );
-
- printf( "init over!\n" );
- while(1){
- // 寻卡
- status= PcdRequest( REQ_ALL , TagType ); // REQ_ALL代表寻天线区内所有卡。TagType为返回的卡类型
- if(!status)
- {
- // 防冲突
- status = PcdAnticoll(SelectedSnr);
- if(!status)
- {
- // 选卡
- status=PcdSelect(SelectedSnr);
- if(!status)
- {
- // 认证
- snr = 1; // 扇区号1
- status = PcdAuthState(KEYA, (snr*4+3), DefaultKey, SelectedSnr); // 校验1扇区密码,密码位于每一扇区第3块
- // 验证A密钥,块地址,扇区密码,卡序列号
- {
- if(!status)
- {
- //读写卡
- 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), "way2"); // 写卡,将buf[0]-buf[16]写入1扇区0块
- if(!status)
- {
- //读写成功
- printf("read finish!\n");
- printf("读到的值是: %s\n",buf);
- WaitCardOff();
- }
- }
- }
- }
- }
- }
- }
- }
- </font>
复制代码RC522.h - <font face="微软雅黑" size="3">
- #ifndef __RC522_H
- #define __RC522_H
-
- #define MF522_RST_PIN GPIO_Pin_11
- #define MF522_RST_PORT GPIOB
- #define MF522_RST_CLK RCC_APB2Periph_GPIOB
-
- #define MF522_MISO_PIN GPIO_Pin_10
- #define MF522_MISO_PORT GPIOB
- #define MF522_MISO_CLK RCC_APB2Periph_GPIOB
-
- #define MF522_MOSI_PIN GPIO_Pin_1
- #define MF522_MOSI_PORT GPIOB
- #define MF522_MOSI_CLK RCC_APB2Periph_GPIOB
-
- #define MF522_SCK_PIN GPIO_Pin_0
- #define MF522_SCK_PORT GPIOB
- #define MF522_SCK_CLK RCC_APB2Periph_GPIOB
-
- #define MF522_NSS_PIN GPIO_Pin_7
- #define MF522_NSS_PORT GPIOA
- #define MF522_NSS_CLK RCC_APB2Periph_GPIOA
-
- #define RST_H GPIO_SetBits(MF522_RST_PORT, MF522_RST_PIN)
- #define RST_L GPIO_ResetBits(MF522_RST_PORT, MF522_RST_PIN)
- #define MOSI_H GPIO_SetBits(MF522_MOSI_PORT, MF522_MOSI_PIN)
- #define MOSI_L GPIO_ResetBits(MF522_MOSI_PORT, MF522_MOSI_PIN)
- #define SCK_H GPIO_SetBits(MF522_SCK_PORT, MF522_SCK_PIN)
- #define SCK_L GPIO_ResetBits(MF522_SCK_PORT, MF522_SCK_PIN)
- #define NSS_H GPIO_SetBits(MF522_NSS_PORT, MF522_NSS_PIN)
- #define NSS_L GPIO_ResetBits(MF522_NSS_PORT, MF522_NSS_PIN)
- #define READ_MISO GPIO_ReadInputDataBit(MF522_MISO_PORT, MF522_MISO_PIN)
-
- // 函数原型
- void PcdInit(void);
- char PcdReset(void);
- void PcdAntennaOn(void);
- void PcdAntennaOff(void);
- char PcdRequest(unsigned char req_code,unsigned char *pTagType);
- char PcdAnticoll(unsigned char *pSnr);
- char PcdSelect(unsigned char *pSnr);
- char PcdAuthState(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr);
- char PcdRead(unsigned char addr,unsigned char *pData);
- char PcdWrite(unsigned char addr,unsigned char *pData);
- char PcdValue(unsigned char dd_mode,unsigned char addr,unsigned char *pValue);
- char PcdBakValue(unsigned char sourceaddr, unsigned char goaladdr);
- char PcdHalt(void);
- 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);
- void WriteRawRC(unsigned char Address,unsigned char value);
- unsigned char ReadRawRC(unsigned char Address);
- void SetBitMask(unsigned char reg,unsigned char mask);
- void ClearBitMask(unsigned char reg,unsigned char mask);
- char M500PcdConfigISOType(unsigned char type);
- void delay_10ms(unsigned int _10ms);
- void WaitCardOff(void);
-
- // MF522命令字
- #define PCD_IDLE 0x00 //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_ANTICOLL1 0x93 //防冲撞
- #define PICC_ANTICOLL2 0x95 //防冲撞
- #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 //扣款
- #define PICC_INCREMENT 0xC1 //充值
- #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
-
- // MF522 FIFO长度定义
- #define DEF_FIFO_LENGTH 64 //FIFO size=64byte
-
- // MF522寄存器定义
- // 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
-
-
- #define REQ_ALL 0x52
- #define KEYA 0x60
-
- // 和MF522通讯时返回的错误代码
- #define MI_OK (char)0
- #define MI_NOTAGERR (char)(-1)
- #define MI_ERR (char)(-2)
-
- #endif
- </font>
复制代码RC522.c - <font face="微软雅黑" size="3">#include "RC522.H"
- #include "stm32f10x_gpio.h"
-
- #define MAXRLEN 18
-
- void PcdInit()
- {
- 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);
- }
-
- //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)
- {
- }
-
- WriteRawRC(CommandReg,PCD_RESETPHASE);
-
- WriteRawRC(ModeReg,0x3D); //和Mifare卡通讯,CRC初始值0x6363
- WriteRawRC(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 default
- WriteRawRC(DivlEnReg,0x0); //as default
- WriteRawRC(ComIrqReg,0x04); //as default
- WriteRawRC(DivIrqReg,0x0); //as default
- WriteRawRC(Status2Reg,0x0);//80 //trun off temperature sensor
- WriteRawRC(WaterLevelReg,0x08); //as default
- WriteRawRC(ControlReg,0x20); //as default
- WriteRawRC(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);//26
- WriteRawRC(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;
- else
- MOSI_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;
- else
- MOSI_L;
- SCK_H;
- ucAddr <<= 1;
- SCK_L;
- }
-
- for(i=8;i>0;i--)
- {
- if(value&0x80)
- MOSI_H;
- else
- MOSI_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25ms
- i = 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 now
- WriteRawRC(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(10);
- }
- }
-
- // Delay 10ms
- void delay_10ms(unsigned int _10ms)
- {
- unsigned int i, j;
-
- for(i=0; i<_10ms; i++)
- {
- for(j=0; j<60000; j++);
- }
- }</font>
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