/**
* @brief ：通过RC522和ISO14443卡通讯
* @param ：ucCommand：RC522命令字
* pInData：通过RC522发送到卡片的数据
* ucInLenByte：发送数据的字节长度
* pOutData：接收到的卡片返回数据
* pOutLenBit：返回数据的位长度
* @retval ：状态值MI_OK，成功
*/
char PcdComMF522 ( uint8_t ucCommand, uint8_t * pInData, uint8_t ucInLenByte, uint8_t * pOutData, uint32_t * pOutLenBit )
{
char cStatus = MI_ERR;
uint8_t ucIrqEn = 0x00;
uint8_t ucWaitFor = 0x00;
uint8_t ucLastBits;
uint8_t ucN;
uint32_t ul;
switch ( ucCommand )
{
case PCD_AUTHENT: //Mifare认证
ucIrqEn = 0x12; //允许错误中断请求ErrIEn 允许空闲中断IdleIEn
ucWaitFor = 0x10; //认证寻卡等待时候 查询空闲中断标志位
break;
case PCD_TRANSCEIVE: //接收发送 发送接收
ucIrqEn = 0x77; //允许TxIEn RxIEn IdleIEn LoAlertIEn ErrIEn TimerIEn
ucWaitFor = 0x30; //寻卡等待时候 查询接收中断标志位与 空闲中断标志位
break;
default:
break;
}
RC522_Write_Register ( ComIEnReg, ucIrqEn | 0x80 ); //IRqInv置位管脚IRQ与Status1Reg的IRq位的值相反
RC522_ClearBit_Register ( ComIrqReg, 0x80 ); //Set1该位清零时，CommIRqReg的屏蔽位清零
RC522_Write_Register ( CommandReg, PCD_IDLE ); //写空闲命令
RC522_SetBit_Register ( FIFOLevelReg, 0x80 ); //置位FlushBuffer清除内部FIFO的读和写指针以及ErrReg的BufferOvfl标志位被清除
for ( ul = 0; ul < ucInLenByte; ul ++ )
RC522_Write_Register ( FIFODataReg, pInData [ ul ] ); //写数据进FIFOdata
RC522_Write_Register ( CommandReg, ucCommand ); //写命令
if ( ucCommand == PCD_TRANSCEIVE )
RC522_SetBit_Register(BitFramingReg,0x80); //StartSend置位启动数据发送 该位与收发命令使用时才有效
ul = 1000;//根据时钟频率调整，操作M1卡最大等待时间25ms
do //认证 与寻卡等待时间
{
ucN = RC522_Read_Register ( ComIrqReg ); //查询事件中断
ul --;
} while ( ( ul != 0 ) && ( ! ( ucN & 0x01 ) ) && ( ! ( ucN & ucWaitFor ) ) ); //退出条件i=0,定时器中断，与写空闲命令
RC522_ClearBit_Register ( BitFramingReg, 0x80 ); //清理允许StartSend位
if ( ul != 0 )
{
if ( ! ( RC522_Read_Register ( ErrorReg ) & 0x1B ) ) //读错误标志寄存器BufferOfI CollErr ParityErr ProtocolErr
{
cStatus = MI_OK;
if ( ucN & ucIrqEn & 0x01 ) //是否发生定时器中断
cStatus = MI_NOTAGERR;
if ( ucCommand == PCD_TRANSCEIVE )
{
ucN = RC522_Read_Register ( FIFOLevelReg ); //读FIFO中保存的字节数
ucLastBits = RC522_Read_Register ( ControlReg ) & 0x07; //最后接收到得字节的有效位数
if ( ucLastBits )
* pOutLenBit = ( ucN - 1 ) * 8 + ucLastBits; //N个字节数减去1（最后一个字节）+最后一位的位数 读取到的数据总位数
else
* pOutLenBit = ucN * 8; //最后接收到的字节整个字节有效
if ( ucN == 0 )
ucN = 1;
if ( ucN > MAXRLEN )
ucN = MAXRLEN;
for ( ul = 0; ul < ucN; ul ++ )
pOutData [ ul ] = RC522_Read_Register ( FIFODataReg );
}
}
else
cStatus = MI_ERR;
}
RC522_SetBit_Register ( ControlReg, 0x80 ); // stop timer now
RC522_Write_Register ( CommandReg, PCD_IDLE );
return cStatus;
}
/**
* @brief ：寻卡
* @param ucReq_code，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，卡片类型代码
* = 0x4400：Mifare_UltraLight
* = 0x0400：Mifare_One(S50)
* = 0x0200：Mifare_One(S70)
* = 0x0800：Mifare_Pro(X))
* = 0x4403：Mifare_DESFire
* @retval ：状态值MI_OK，成功
*/
char PcdRequest ( uint8_t ucReq_code, uint8_t * pTagType )
{
char cStatus;
uint8_t ucComMF522Buf [ MAXRLEN ];
uint32_t ulLen;
RC522_ClearBit_Register ( Status2Reg, 0x08 ); //清理指示MIFARECyptol单元接通以及所有卡的数据通信被加密的情况
RC522_Write_Register ( BitFramingReg, 0x07 ); // 发送的最后一个字节的 七位
RC522_SetBit_Register ( TxControlReg, 0x03 ); //TX1,TX2管脚的输出信号传递经发送调制的13.56的能量载波信号
ucComMF522Buf [ 0 ] = ucReq_code; //存入寻卡方式
/* PCD_TRANSCEIVE：发送并接收数据的命令，RC522向卡片发送寻卡命令，卡片返回卡的型号代码到ucComMF522Buf中 */
cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 1, ucComMF522Buf, & ulLen ); //寻卡
if ( ( cStatus == MI_OK ) && ( ulLen == 0x10 ) ) //寻卡成功返回卡类型
{
/* 接收卡片的型号代码 */
* pTagType = ucComMF522Buf [ 0 ];
* ( pTagType + 1 ) = ucComMF522Buf [ 1 ];
}
else
cStatus = MI_ERR;
return cStatus;
}
/**
* @brief ：防冲突
* @param ：Snr：卡片序列，4字节，会返回选中卡片的序列
* @retval ：状态值MI_OK，成功
*/
char PcdAnticoll ( uint8_t * pSnr )
{
char cStatus;
uint8_t uc, ucSnr_check = 0;
uint8_t ucComMF522Buf [ MAXRLEN ];
uint32_t ulLen;
RC522_ClearBit_Register ( Status2Reg, 0x08 ); //清MFCryptol On位 只有成功执行MFAuthent命令后，该位才能置位
RC522_Write_Register ( BitFramingReg, 0x00); //清理寄存器 停止收发
RC522_ClearBit_Register ( CollReg, 0x80 ); //清ValuesAfterColl所有接收的位在冲突后被清除
ucComMF522Buf [ 0 ] = 0x93; //卡片防冲突命令
ucComMF522Buf [ 1 ] = 0x20;
/* 将卡片防冲突命令通过RC522传到卡片中，返回的是被选中卡片的序列 */
cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 2, ucComMF522Buf, & ulLen);//与卡片通信
if ( cStatus == MI_OK) //通信成功
{
for ( uc = 0; uc < 4; uc ++ )
{
* ( pSnr + uc ) = ucComMF522Buf [ uc ]; //读出UID
ucSnr_check ^= ucComMF522Buf [ uc ];
}
if ( ucSnr_check != ucComMF522Buf [ uc ] )
cStatus = MI_ERR;
}
RC522_SetBit_Register ( CollReg, 0x80 );
return cStatus;
}
/**
* @brief :用RC522计算CRC16（循环冗余校验）
* @param ：pIndata：计算CRC16的数组
* ucLen：计算CRC16的数组字节长度
* pOutData：存放计算结果存放的首地址
* @retval ：状态值MI_OK，成功
*/
void CalulateCRC ( uint8_t * pIndata, u8 ucLen, uint8_t * pOutData )
{
uint8_t uc, ucN;
RC522_ClearBit_Register(DivIrqReg,0x04);
RC522_Write_Register(CommandReg,PCD_IDLE);
RC522_SetBit_Register(FIFOLevelReg,0x80);
for ( uc = 0; uc < ucLen; uc ++)
RC522_Write_Register ( FIFODataReg, * ( pIndata + uc ) );
RC522_Write_Register ( CommandReg, PCD_CALCCRC );
uc = 0xFF;
do
{
ucN = RC522_Read_Register ( DivIrqReg );
uc --;
} while ( ( uc != 0 ) && ! ( ucN & 0x04 ) );
pOutData [ 0 ] = RC522_Read_Register ( CRCResultRegL );
pOutData [ 1 ] = RC522_Read_Register ( CRCResultRegM );
}
/**
* @brief :选定卡片
* @param ：pSnr：卡片序列号，4字节
* @retval ：状态值MI_OK，成功
*/
char PcdSelect ( uint8_t * pSnr )
{
char ucN;
uint8_t uc;
uint8_t ucComMF522Buf [ MAXRLEN ];
uint32_t ulLen;
/* PICC_ANTICOLL1：防冲突命令 */
ucComMF522Buf [ 0 ] = PICC_ANTICOLL1;
ucComMF522Buf [ 1 ] = 0x70;
ucComMF522Buf [ 6 ] = 0;
for ( uc = 0; uc < 4; uc ++ )
{
ucComMF522Buf [ uc + 2 ] = * ( pSnr + uc );
ucComMF522Buf [ 6 ] ^= * ( pSnr + uc );
}
CalulateCRC ( ucComMF522Buf, 7, & ucComMF522Buf [ 7 ] );
RC522_ClearBit_Register ( Status2Reg, 0x08 );
ucN = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 9, ucComMF522Buf, & ulLen );
if ( ( ucN == MI_OK ) && ( ulLen == 0x18 ) )
ucN = MI_OK;
else
ucN = MI_ERR;
return ucN;
}
/**
* @brief :校验卡片密码
* @param ：ucAuth_mode：密码验证模式
* = 0x60，验证A密钥
* = 0x61，验证B密钥
* ucAddr：块地址
* pKey：密码
* pSnr：卡片序列号，4字节
* @retval ：状态值MI_OK，成功
*/
char PcdAuthState ( uint8_t ucAuth_mode, uint8_t ucAddr, uint8_t * pKey, uint8_t * pSnr )
{
char cStatus;
uint8_t uc, ucComMF522Buf [ MAXRLEN ];
uint32_t ulLen;
ucComMF522Buf [ 0 ] = ucAuth_mode;
ucComMF522Buf [ 1 ] = ucAddr;
/* 前俩字节存储验证模式和块地址，2~8字节存储密码（6个字节），8~14字节存储序列号 */
for ( uc = 0; uc < 6; uc ++ )
ucComMF522Buf [ uc + 2 ] = * ( pKey + uc );
for ( uc = 0; uc < 6; uc ++ )
ucComMF522Buf [ uc + 8 ] = * ( pSnr + uc );
/* 进行冗余校验，14~16俩个字节存储校验结果 */
cStatus = PcdComMF522 ( PCD_AUTHENT, ucComMF522Buf, 12, ucComMF522Buf, & ulLen );
/* 判断验证是否成功 */
if ( ( cStatus != MI_OK ) || ( ! ( RC522_Read_Register ( Status2Reg ) & 0x08 ) ) )
cStatus = MI_ERR;
return cStatus;
}
/**
* @brief :在M1卡的指定块地址写入指定数据
* @param ：ucAddr：块地址
* pData：写入的数据，16字节
* @retval ：状态值MI_OK，成功
*/
char PcdWrite ( uint8_t ucAddr, uint8_t * pData )
{
char cStatus;
uint8_t uc, ucComMF522Buf [ MAXRLEN ];
uint32_t ulLen;
ucComMF522Buf [ 0 ] = PICC_WRITE;//写块命令
ucComMF522Buf [ 1 ] = ucAddr;//写块地址
/* 进行循环冗余校验，将结果存储在& ucComMF522Buf [ 2 ] */
CalulateCRC ( ucComMF522Buf, 2, & ucComMF522Buf [ 2 ] );
/* PCD_TRANSCEIVE:发送并接收数据命令，通过RC522向卡片发送写块命令 */
cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 4, ucComMF522Buf, & ulLen );
/* 通过卡片返回的信息判断，RC522是否与卡片正常通信 */
if ( ( cStatus != MI_OK ) || ( ulLen != 4 ) || ( ( ucComMF522Buf [ 0 ] & 0x0F ) != 0x0A ) )
cStatus = MI_ERR;
if ( cStatus == MI_OK )
{
//memcpy(ucComMF522Buf, pData, 16);
/* 将要写入的16字节的数据，传入ucComMF522Buf数组中 */
for ( uc = 0; uc < 16; uc ++ )
ucComMF522Buf [ uc ] = * ( pData + uc );
/* 冗余校验 */
CalulateCRC ( ucComMF522Buf, 16, & ucComMF522Buf [ 16 ] );
/* 通过RC522，将16字节数据包括2字节校验结果写入卡片中 */
cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 18, ucComMF522Buf, & ulLen );
/* 判断写地址是否成功 */
if ( ( cStatus != MI_OK ) || ( ulLen != 4 ) || ( ( ucComMF522Buf [ 0 ] & 0x0F ) != 0x0A ) )
cStatus = MI_ERR;
}
return cStatus;
}
/**
* @brief :读取M1卡的指定块地址的数据
* @param ：ucAddr：块地址
* pData：读出的数据，16字节
* @retval ：状态值MI_OK，成功
*/
char PcdRead ( uint8_t ucAddr, uint8_t * pData )
{
char cStatus;
uint8_t uc, ucComMF522Buf [ MAXRLEN ];
uint32_t ulLen;
ucComMF522Buf [ 0 ] = PICC_READ;
ucComMF522Buf [ 1 ] = ucAddr;
/* 冗余校验 */
CalulateCRC ( ucComMF522Buf, 2, & ucComMF522Buf [ 2 ] );
/* 通过RC522将命令传给卡片 */
cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 4, ucComMF522Buf, & ulLen );
/* 如果传输正常，将读取到的数据传入pData中 */
if ( ( cStatus == MI_OK ) && ( ulLen == 0x90 ) )
{
for ( uc = 0; uc < 16; uc ++ )
* ( pData + uc ) = ucComMF522Buf [ uc ];
}
else
cStatus = MI_ERR;
return cStatus;
}
/**
* @brief :让卡片进入休眠模式
* @param ：无
* @retval ：状态值MI_OK，成功
*/
char PcdHalt( void )
{
uint8_t ucComMF522Buf [ MAXRLEN ];
uint32_t ulLen;
ucComMF522Buf [ 0 ] = PICC_HALT;
ucComMF522Buf [ 1 ] = 0;
CalulateCRC ( ucComMF522Buf, 2, & ucComMF522Buf [ 2 ] );
PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 4, ucComMF522Buf, & ulLen );
return MI_OK;
}
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