基于Stm32的RFID-RC522模块的对RFID读写使用
2024-06-17 02:32:38
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
// 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 );
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
if(!status)
{status = PcdAnticoll(SelectedSnr);// ......
}
###认证
if(!status)
{// 认证snr = 1; // 扇区号1status = 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// ......
}
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
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();}
}
##代码 以下为核心代码： main.c
#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1status = 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();}}}}}}}
}RC522.h
#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)#endifRC522.c
#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(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++);}
}转载于:https://my.oschina.net/u/3907010/blog/1927771
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