基于STM32的RFID模块简单应用_stm32rfid

#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)

//
//端口定义
/
//MFRC522
#define MF522_RST_PIN GPIO_Pin_12
#define MF522_RST_PORT GPIOA
#define MF522_RST_CLK RCC_APB2Periph_GPIOA

#define MF522_MISO_PIN GPIO_Pin_11
#define MF522_MISO_PORT GPIOA
#define MF522_MISO_CLK RCC_APB2Periph_GPIOA

#define MF522_MOSI_PIN GPIO_Pin_8
#define MF522_MOSI_PORT GPIOA
#define MF522_MOSI_CLK RCC_APB2Periph_GPIOA

#define MF522_SCK_PIN GPIO_Pin_14
#define MF522_SCK_PORT GPIOB
#define MF522_SCK_CLK RCC_APB2Periph_GPIOB

#define MF522_NSS_PIN GPIO_Pin_12
#define MF522_NSS_PORT GPIOB
#define MF522_NSS_CLK RCC_APB2Periph_GPIOB

//指示灯
#define LED_PIN GPIO_Pin_0
#define LED_PORT GPIOB
#define LED_CLK RCC_APB2Periph_GPIOB

#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)
#define LED_ON GPIO_SetBits(LED_PORT, LED_PIN)
#define LED_OFF GPIO_ResetBits(LED_PORT, LED_PIN)
/
//函数原型
/

#define TRUE 1
#define FALSE 0

void RFID_GPIO_Init(void);
void Pcd_init(void);

接着是RC522.c

#include “stm32f10x_gpio.h”
#include “stm32f10x_rcc.h”
#include “rc522.h”
#include “delay.h”
//#include <string.h>

void Pcd_init(void)
{
LED_OFF;
delay_ms(100);
PcdReset();
PcdAntennaOff();
PcdAntennaOn();
M500PcdConfigISOType( ‘A’ );
LED_ON;
delay_ms(100);
LED_OFF;
delay_ms(100);
LED_ON;
delay_ms(100);
LED_OFF;
}

void RFID_GPIO_Init(void)
{
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);
	
  /\* Enable the GPIO Clock \*/
  RCC\_APB2PeriphClockCmd(LED\_CLK, ENABLE);

  /\* Configure the GPIO pin \*/
  GPIO_InitStructure.GPIO_Pin = LED\_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO\_Init(LED\_PORT, &GPIO_InitStructure);

}

#define MAXRLEN 18
/
//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_ms(10);
RST_L;
delay_ms(10);
RST_H;
delay_ms(100);

	if(ReadRawRC(0x02) == 0x80)
	{
		LED\_ON;
		delay\_ms(100);	
		LED\_OFF;
		delay\_ms(100);	
		LED\_ON;
		delay\_ms(100);	
		LED\_OFF;
		delay\_ms(100);	
	}

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_ms(10);
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);

作者：普通网友