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/*
* 文件名：MFRC522.c
* 芯片：STC12C5A60S2
* 晶振：12MHz
* 創(chuàng) 建者：冷月
* 創(chuàng)建日期：11.12
* 修改者：
* 修改日期：
* 功能描述：Mifare1 尋卡→防沖突→選卡→讀寫實(shí)現(xiàn)
*/
#include "MFRC522.h"
#include "SPI.h"
#include "Delay.h"
#include "UART.h"
#define uchar unsigned char
#define uint unsigned int
//4字節(jié)卡序列號(hào)，第5字節(jié)為校驗(yàn)字節(jié)
uchar serNum[5];
//函數(shù)原型申明
void SetBitMask(uchar reg, uchar mask);
void ClearBitMask(uchar reg, uchar mask);
void AntennaOn(void);
void AntennaOff(void);
/*
* 函數(shù) 名：Write_MFRC5200
* 功能描述：向MFRC522的某一寄存器寫一個(gè)字節(jié)數(shù)據(jù)
* 輸入?yún)?shù)：addr--寄存器地址；val--要寫入的值
* 返回值：無(wú)
*/
void Write_MFRC522(uchar addr, uchar val)
{
CS = 0;
//地址格式：0XXXXXX0
SPI_Write((addr<<1)&0x7E);
SPI_Write(val);
CS = 1;
}
/*
* 函數(shù) 名：Read_MFRC522
* 功能描述：從MFRC522的某一寄存器讀一個(gè)字節(jié)數(shù)據(jù)
* 輸入?yún)?shù)：addr--寄存器地址
* 返回值：返回讀取到的一個(gè)字節(jié)數(shù)據(jù)
*/
uchar Read_MFRC522(uchar addr)
{
uchar val;
CS = 0;
//地址格式：1XXXXXX0
SPI_Write(((addr<<1)&0x7E) | 0x80);
val = SPI_Read();
CS = 1;
return val;
}
/*
* 函數(shù) 名：SetBitMask
* 功能描述：置RC522寄存器位
* 輸入?yún)?shù)：reg--寄存器地址;mask--置位值
* 返回值：無(wú)
*/
void SetBitMask(uchar reg, uchar mask)
{
uchar tmp;
tmp = Read_MFRC522(reg);
Write_MFRC522(reg, tmp | mask); // set bit mask
}
/*
* 函數(shù) 名：ClearBitMask
* 功能描述：清RC522寄存器位
* 輸入?yún)?shù)：reg--寄存器地址;mask--清位值
* 返回值：無(wú)
*/
void ClearBitMask(uchar reg, uchar mask)
{
uchar tmp;
tmp = Read_MFRC522(reg);
Write_MFRC522(reg, tmp & (~mask)); // clear bit mask
}
/*
* 函數(shù) 名：AntennaOn
* 功能描述：開(kāi)啟天線,每次啟動(dòng)或關(guān)閉天險(xiǎn)發(fā)射之間應(yīng)至少有1ms的間隔
* 輸入?yún)?shù)：無(wú)
* 返回值：無(wú)
*/
void AntennaOn(void)
{
uchar temp;
temp = Read_MFRC522(TxControlReg);
if (!(temp & 0x03))
{
SetBitMask(TxControlReg, 0x03);
}
}
/*
* 函數(shù) 名：AntennaOff
* 功能描述：關(guān)閉天線,每次啟動(dòng)或關(guān)閉天險(xiǎn)發(fā)射之間應(yīng)至少有1ms的間隔
* 輸入?yún)?shù)：無(wú)
* 返回值：無(wú)
*/
void AntennaOff(void)
{
ClearBitMask(TxControlReg, 0x03);
}
/*
* 函數(shù) 名：ResetMFRC522
* 功能描述：復(fù)位RC522
* 輸入?yún)?shù)：無(wú)
* 返回值：無(wú)
*/
void MFRC522_Reset(void)
{
Write_MFRC522(CommandReg, PCD_RESETPHASE);
}
/*
* 函數(shù) 名：InitMFRC522
* 功能描述：初始化RC522
* 輸入?yún)?shù)：無(wú)
* 返回值：無(wú)
*/
void MFRC522_Init(void)
{
NRSTPD = 1;
MFRC522_Reset();
//Timer: TPrescaler*TreloadVal/6.78MHz = 24ms
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 ???
//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0
//Write_MFRC522(RxSelReg, 0x86); //RxWait = RxSelReg[5..0]
//Write_MFRC522(RFCfgReg, 0x7F); //RxGain = 48dB
AntennaOn(); //打開(kāi)天線
}
/*
* 函數(shù) 名：MFRC522_Request
* 功能描述：尋卡，讀取卡類型號(hào)
* 輸入?yún)?shù)：reqMode--尋卡方式，
* TagType--返回卡片類型
* 0x4400 = Mifare_UltraLight
* 0x0400 = Mifare_One(S50)
* 0x0200 = Mifare_One(S70)
* 0x0800 = Mifare_Pro(X)
* 0x4403 = Mifare_DESFire
* 返回值：成功返回MI_OK
*/
uchar MFRC522_Request(uchar reqMode, uchar *TagType)
{
uchar status;
uint backBits; //接收到的數(shù)據(jù)位數(shù)
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;
}
/*
* 函數(shù) 名：MFRC522_ToCard
* 功能描述：RC522和ISO14443卡通訊
* 輸入?yún)?shù)：command--MF522命令字，
* sendData--通過(guò)RC522發(fā)送到卡片的數(shù)據(jù),
* sendLen--發(fā)送的數(shù)據(jù)長(zhǎng)度
* backData--接收到的卡片返回?cái)?shù)據(jù)，
* backLen--返回?cái)?shù)據(jù)的位長(zhǎng)度
* 返回值：成功返回MI_OK
*/
uchar 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: //認(rèn)證卡密
{
irqEn = 0x12;
waitIRq = 0x10;
break;
}
case PCD_TRANSCEIVE: //發(fā)送FIFO中數(shù)據(jù)
{
irqEn = 0x77;
waitIRq = 0x30;
break;
}
default:
break;
}
Write_MFRC522(CommIEnReg, irqEn|0x80); //允許中斷請(qǐng)求
ClearBitMask(CommIrqReg, 0x80); //清除所有中斷請(qǐng)求位
SetBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO初始化
Write_MFRC522(CommandReg, PCD_IDLE); //NO action;取消當(dāng)前命令 ???
//向FIFO中寫入數(shù)據(jù)
for (i=0; i<sendLen; i++)
{
Write_MFRC522(FIFODataReg, sendData[i]);
}
//執(zhí)行命令
Write_MFRC522(CommandReg, command);
if (command == PCD_TRANSCEIVE)
{
SetBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts
}
//等待接收數(shù)據(jù)完成
i = 2000; //i根據(jù)時(shí)鐘頻率調(diào)整，操作M1卡最大等待時(shí)間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;
}
//讀取FIFO中接收到的數(shù)據(jù)
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;
}
/*
* 函數(shù) 名：MFRC522_Anticoll
* 功能描述：防沖突檢測(cè)，讀取選中卡片的卡序列號(hào)
* 輸入?yún)?shù)：serNum--返回4字節(jié)卡序列號(hào),第5字節(jié)為校驗(yàn)字節(jié)
* 返回值：成功返回MI_OK
*/
uchar MFRC522_Anticoll(uchar *serNum)
{
uchar status;
uchar i;
uchar serNumCheck=0;
uint unLen;
//ClearBitMask(Status2Reg, 0x08); //TempSensclear
//ClearBitMask(CollReg,0x80); //ValuesAfterColl
Write_MFRC522(BitFramingReg, 0x00); //TxLastBists = BitFramingReg[2..0]
serNum[0] = PICC_ANTICOLL;
serNum[1] = 0x20;
status = MFRC522_ToCard(PCD_TRANSCEIVE, serNum, 2, serNum, &unLen);
if (status == MI_OK)
{
//校驗(yàn)卡序列號(hào)
for (i=0; i<4; i++)
{
serNumCheck ^= serNum[i];
}
if (serNumCheck != serNum[i])
{
status = MI_ERR;
}
}
//SetBitMask(CollReg, 0x80); //ValuesAfterColl=1
return status;
}
/*
* 函數(shù) 名：CalulateCRC
* 功能描述：用MF522計(jì)算CRC
* 輸入?yún)?shù)：pIndata--要讀數(shù)CRC的數(shù)據(jù)，len--數(shù)據(jù)長(zhǎng)度，pOutData--計(jì)算的CRC結(jié)果
* 返回值：無(wú)
*/
void CalulateCRC(uchar *pIndata, uchar len, uchar *pOutData)
{
uchar i, n;
ClearBitMask(DivIrqReg, 0x04); //CRCIrq = 0
SetBitMask(FIFOLevelReg, 0x80); //清FIFO指針
//Write_MFRC522(CommandReg, PCD_IDLE);
//向FIFO中寫入數(shù)據(jù)
for (i=0; i<len; i++)
{
Write_MFRC522(FIFODataReg, *(pIndata+i));
}
Write_MFRC522(CommandReg, PCD_CALCCRC);
//等待CRC計(jì)算完成
i = 0xFF;
do
{
n = Read_MFRC522(DivIrqReg);
i--;
}
while ((i!=0) && !(n&0x04)); //CRCIrq = 1
//讀取CRC計(jì)算結(jié)果
pOutData[0] = Read_MFRC522(CRCResultRegL);
pOutData[1] = Read_MFRC522(CRCResultRegM);
}
/*
* 函數(shù) 名：MFRC522_SelectTag
* 功能描述：選卡，讀取卡存儲(chǔ)器容量
* 輸入?yún)?shù)：serNum--傳入卡序列號(hào)
* 返回值：成功返回卡容量
*/
uchar MFRC522_SelectTag(uchar *serNum)
{
uchar i;
uchar status;
uchar size;
uint recvBits;
uchar buffer[9];
//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0
buffer[0] = PICC_SElECTTAG;
buffer[1] = 0x70;
for (i=0; i<5; i++)
{
buffer[i+2] = *(serNum+i);
}
CalulateCRC(buffer, 7, &buffer[7]); //??
status = MFRC522_ToCard(PCD_TRANSCEIVE, buffer, 9, buffer, &recvBits);
if ((status == MI_OK) && (recvBits == 0x18))
{
size = buffer[0];
}
else
{
size = 0;
}
return size;
}
/*
* 函數(shù) 名：MFRC522_Auth
* 功能描述：驗(yàn)證卡片密碼
* 輸入?yún)?shù)：authMode--密碼驗(yàn)證模式
0x60 = 驗(yàn)證A密鑰
0x61 = 驗(yàn)證B密鑰
BlockAddr--塊地址
Sectorkey--扇區(qū)密碼
serNum--卡片序列號(hào)，4字節(jié)
* 返回值：成功返回MI_OK
*/
uchar MFRC522_Auth(uchar authMode, uchar BlockAddr, uchar *Sectorkey, uchar *serNum)
{
uchar status;
uint recvBits;
uchar i;
uchar buff[12];
//驗(yàn)證指令+塊地址＋扇區(qū)密碼＋卡序列號(hào)
buff[0] = authMode;
buff[1] = BlockAddr;
for (i=0; i<6; i++)
{
buff[i+2] = *(Sectorkey+i);
}
for (i=0; i<4; i++)
{
buff[i+8] = *(serNum+i);
}
status = MFRC522_ToCard(PCD_AUTHENT, buff, 12, buff, &recvBits);
if ((status != MI_OK) || (!(Read_MFRC522(Status2Reg) & 0x08)))
{
status = MI_ERR;
}
return status;
}
/*
* 函數(shù) 名：MFRC522_Read
* 功能描述：讀塊數(shù)據(jù)
* 輸入?yún)?shù)：blockAddr--塊地址;recvData--讀出的塊數(shù)據(jù)
* 返回值：成功返回MI_OK
*/
uchar MFRC522_Read(uchar blockAddr, uchar *recvData)
{
uchar status;
uint unLen;
recvData[0] = PICC_READ;
recvData[1] = blockAddr;
CalulateCRC(recvData,2, &recvData[2]);
status = MFRC522_ToCard(PCD_TRANSCEIVE, recvData, 4, recvData, &unLen);
if ((status != MI_OK) || (unLen != 0x90))
{
status = MI_ERR;
}
return status;
}
/*
* 函數(shù) 名：MFRC522_Write
* 功能描述：寫塊數(shù)據(jù)
* 輸入?yún)?shù)：blockAddr--塊地址;writeData--向塊寫16字節(jié)數(shù)據(jù)
* 返回值：成功返回MI_OK
*/
uchar MFRC522_Write(uchar blockAddr, uchar *writeData)
{
uchar status;
uint recvBits;
uchar i;
uchar buff[18];
buff[0] = PICC_WRITE;
buff[1] = blockAddr;
CalulateCRC(buff, 2, &buff[2]);
status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 4, buff, &recvBits);
if ((status != MI_OK) || (recvBits != 4) || ((buff[0] & 0x0F) != 0x0A))
{
status = MI_ERR;
}
if (status == MI_OK)
{
for (i=0; i<16; i++) //向FIFO寫16Byte數(shù)據(jù)
{
buff[i] = *(writeData+i);
}
CalulateCRC(buff, 16, &buff[16]);
status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 18, buff, &recvBits);
if ((status != MI_OK) || (recvBits != 4) || ((buff[0] & 0x0F) != 0x0A))
{
status = MI_ERR;
}
}
return status;
}
/*
* 函數(shù) 名：MFRC522_Halt
* 功能描述：命令卡片進(jìn)入休眠狀態(tài)
* 輸入?yún)?shù)：無(wú)
* 返回值：無(wú)
*/
void MFRC522_Halt(void)
{
uchar status;
uint unLen;
uchar buff[4];
buff[0] = PICC_HALT;
buff[1] = 0;
CalulateCRC(buff, 2, &buff[2]);
status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 4, buff,&unLen);
}

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