智能停车场设计 - 图文(6)

//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]:接受到的卡片返回数据 // *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

{ WriteRawRC(FIFODataReg, pInData[i]); } WriteRawRC(CommandReg, Command);

if (Command == PCD_TRANSCEIVE)

{ SetBitMask(BitFramingReg,0x80); }

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i = 600;//根据时钟频率调整，操作M1卡最大等待时间25ms 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) {

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

{ pOutData[i] = ReadRawRC(FIFODataReg); } } } else

{ status = MI_ERR; } }

SetBitMask(ControlReg,0x80); // stop timer now WriteRawRC(CommandReg,PCD_IDLE); return status; }

n = ReadRawRC(FIFOLevelReg);

lastBits = ReadRawRC(ControlReg) & 0x07;

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///////////////////////////////////////////////////////////////////// // 开启天线

//每次启动或关闭天线发射之间应至少有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); }

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