uint8_t MFRC522_Request(uint8_t reqMode, uint8_t *TagType)
{
uint8_t status;
uint32_t backBits;
Write_MFRC522(BitFramingReg, 0x07); //TxLastBists = BitFramingReg[2..0]
TagType[0] = reqMode;
status = MFRC522_ToCard(PCD_TRANSCEIVE, TagType, 1, TagType, &backBits);
if ((status != MI_OK) || (backBits != 0x10))
{
status = MI_ERR;
}
return status;
}
/*
Function: void MFRC522_Init(void)
Description: Initialize all Hardware & Software configuration in RFID Reader.
*/
void MFRC522_Init(void)
{
MFRC522_Reset();
Write_MFRC522(TModeReg, 0x8D); //Tauto=1; f(Timer) = 6.78MHz/TPreScaler
Write_MFRC522(TPrescalerReg, 0x3E); //TModeReg[3..0] + TPrescalerReg
Write_MFRC522(TReloadRegL, 30);
Write_MFRC522(TReloadRegH, 0);
Write_MFRC522(TxAutoReg, 0x40); //100%ASK
Write_MFRC522(ModeReg, 0x3D); //CRC初始值0x6363 ???
AntennaOn(); //打开天线
}
void RFID::MFRC522_Init(void) {
digitalWrite(NRSTPD,HIGH);
MFRC522_Reset();
Write_MFRC522(TModeReg, 0x8D); //Tauto=1; f(Timer) = 6.78MHz/TPreScaler
Write_MFRC522(TPrescalerReg, 0x3E); //TModeReg[3..0] + TPrescalerReg
Write_MFRC522(TReloadRegL, 30);
Write_MFRC522(TReloadRegH, 0);
Write_MFRC522(TxAutoReg, 0x40); //100%ASK
Write_MFRC522(ModeReg, 0x3D); //CRC???0x6363 ???
AntennaOn(); //????
}
uchar RFID::MFRC522_ToCard(uchar command, uchar *sendData, uchar sendLen, uchar *backData, uint *backLen) {
uchar status = MI_ERR;
uchar irqEn = 0x00;
uchar waitIRq = 0x00;
uchar lastBits;
uchar n;
uint i;
switch (command)
{
case PCD_AUTHENT: //????
{
irqEn = 0x12;
waitIRq = 0x10;
break;
}
case PCD_TRANSCEIVE: //??FIFO???
{
irqEn = 0x77;
waitIRq = 0x30;
break;
}
default:
break;
}
Write_MFRC522(CommIEnReg, irqEn|0x80); //??????
ClearBitMask(CommIrqReg, 0x80); //?????????
SetBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO???
Write_MFRC522(CommandReg, PCD_IDLE); //NO action;?????? ???
//?FIFO?????
for (i=0; i<sendLen; i++)
{
Write_MFRC522(FIFODataReg, sendData[i]);
}
//????
Write_MFRC522(CommandReg, command);
if (command == PCD_TRANSCEIVE)
{
SetBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts
}
//????????
i = 2000; //i????????,??M1???????25ms ???
do
{
//CommIrqReg[7..0]
//Set1 TxIRq RxIRq IdleIRq HiAlerIRq LoAlertIRq ErrIRq TimerIRq
n = Read_MFRC522(CommIrqReg);
i--;
}
while ((i!=0) && !(n&0x01) && !(n&waitIRq));
ClearBitMask(BitFramingReg, 0x80); //StartSend=0
if (i != 0)
{
if(!(Read_MFRC522(ErrorReg) & 0x1B)) //BufferOvfl Collerr CRCErr ProtecolErr
{
status = MI_OK;
if (n & irqEn & 0x01)
{
status = MI_NOTAGERR; //??
}
if (command == PCD_TRANSCEIVE)
{
n = Read_MFRC522(FIFOLevelReg);
lastBits = Read_MFRC522(ControlReg) & 0x07;
if (lastBits)
{
*backLen = (n-1)*8 + lastBits;
}
else
{
*backLen = n*8;
}
if (n == 0)
{
n = 1;
}
if (n > MAX_LEN)
{
n = MAX_LEN;
}
//??FIFO???????
for (i=0; i<n; i++)
{
backData[i] = Read_MFRC522(FIFODataReg);
}
}
}
else
{
status = MI_ERR;
}
}
//SetBitMask(ControlReg,0x80); //timer stops
//Write_MFRC522(CommandReg, PCD_IDLE);
return status;
}
void RFID::MFRC522_Reset(void) {
Write_MFRC522(CommandReg, PCD_RESETPHASE);
}
void RFID::ClearBitMask(uchar reg, uchar mask) {
uchar tmp;
tmp = Read_MFRC522(reg);
Write_MFRC522(reg, tmp & (~mask));
}
void RFID::SetBitMask(uchar reg, uchar mask) {
uchar tmp;
tmp = Read_MFRC522(reg);
Write_MFRC522(reg, tmp | mask); // set bit mask
}
void ClearBitMask(uchar reg, uchar mask)
{
uchar tmp;
tmp = Read_MFRC522(reg);
Write_MFRC522(reg, tmp & (~mask)); // clear bit mask
}
/*
* Function name: MFRC522_ToCard
* Description: RC522 and ISO14443 card communication
* Input Parameters: command - MF522 command word,
* SendData - RC522 sent to the card data,
* SendLen - length of data sent
* BackData - received the card data is returned,
* BackLen - returns the bit length of the data
* Return value: the successful return MI_OK
*/
unsigned char MFRC522_ToCard(uchar command, uchar *sendData, uchar sendLen, uchar *backData, uint *backLen)
{
uchar status = MI_ERR;
uchar irqEn = 0x00;
uchar waitIRq = 0x00;
uchar lastBits;
uchar n;
uint i;
switch (command)
{
case PCD_AUTHENT: //Certification card secret
{
irqEn = 0x12;
waitIRq = 0x10;
break;
}
case PCD_TRANSCEIVE: //Transmit FIFO data
{
irqEn = 0x77;
waitIRq = 0x30;
break;
}
default:
break;
}
Write_MFRC522(CommIEnReg, irqEn|0x80); //Interrupt request
ClearBitMask(CommIrqReg, 0x80); //Clear all interrupt request bit
SetBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO Initialization
Write_MFRC522(CommandReg, PCD_IDLE); //NO action ??? !!! ATENTION
//Data is written to the FIFO
for (i=0; i<sendLen; i++)
{
Write_MFRC522(FIFODataReg, sendData[i]);
}
//Execute command
Write_MFRC522(CommandReg, command);
if (command == PCD_TRANSCEIVE)
{
SetBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts
}
//Waiting to receive data to complete
i = 2000; // i clock frequency adjustment, operating maximum wait time of 25ms ???
do
{
//CommIrqReg[7..0]
//Set1 TxIRq RxIRq IdleIRq HiAlerIRq LoAlertIRq ErrIRq TimerIRq
n = Read_MFRC522(CommIrqReg);
i--;
}
while ((i!=0) && !(n&0x01) && !(n&waitIRq));
ClearBitMask(BitFramingReg, 0x80); //StartSend=0
if (i != 0)
{
if(!(Read_MFRC522(ErrorReg) & 0x1B)) //BufferOvfl Collerr CRCErr ProtecolErr
{
status = MI_OK;
if (n & irqEn & 0x01){
status = MI_NOTAGERR; //??
}
if (command == PCD_TRANSCEIVE){
n = Read_MFRC522(FIFOLevelReg);
lastBits = Read_MFRC522(ControlReg) & 0x07;
if (lastBits){
*backLen = (n-1)*8 + lastBits;
}
else{
*backLen = n*8;
}
if (n == 0){
n = 1;
}
if (n > MAX_LEN){
n = MAX_LEN;
}
// Read the FIFO data received
for (i=0; i<n; i++){
backData[i] = Read_MFRC522(FIFODataReg);
}
}
}
else{
status = MI_ERR;
}
}
//SetBitMask(ControlReg,0x80); //timer stops
//Write_MFRC522(CommandReg, PCD_IDLE);
return status;
}
void ClearBitMask(uint8_t reg, uint8_t mask)
{
uint8_t tmp;
tmp = Read_MFRC522(reg);
Write_MFRC522(reg, tmp & (~mask)); // clear bit mask
}
void SetBitMask(uint8_t reg, uint8_t mask)
{
uint8_t tmp;
tmp = Read_MFRC522(reg);
Write_MFRC522(reg, tmp | mask); // set bit mask
}
