RC522驱动：
一、硬件连接：
SDA——P2.0
SCK——P2.1
MISO——P2.3
MOSI——P2.2
RST——P2.4
IRQ——悬空
二、驱动代码编写：
RC522.c文件
/*
**********************************************************************
* 头文件包含
**********************************************************************
*/
#include <intrins.h>
#include <string.h>
#include "rc522.h"
#include "delay.h"
/*
**********************************************************************
* 本地全局变量
**********************************************************************
*/
// 专用SFR
sfr RCAP2LH = 0xCA;
sfr T2LH = 0xCC;
// RC522 SPI接口定义
sbit MF522_NSS = P2^0; //这是SDA
sbit MF522_SCK = P2^1;
sbit MF522_SI = P2^2;
sbit MF522_SO = P2^3;
sbit MF522_RST = P2^4; //
/****************RC522驱动源码**************************************/
/
//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(u8 req_code,u8 *pTagType){
char status;
u32 unLen;
u8 ucComMF522Buf[MAXRLEN];
ClearBitMask(Status2Reg,0x08);
WriteRawRC(BitFramingReg,0x07);
SetBitMask(TxControlReg,0x03);
ucComMF522Buf[0] = req_code;
status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);
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(u8 *pSnr)
{
char status;
u8 i,snr_check=0;
u32 unLen;
u8 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：复位RC522
//返 回: 成功返回MI_OK
/
char PcdReset(void){
MF522_RST=1;
_nop_();//空机器指令
MF522_RST=0;
_nop_();
MF522_RST=1;
_nop_();
WriteRawRC(CommandReg,PCD_RESETPHASE); //往寄出去地址01，写0x0F
_nop_();
WriteRawRC(ModeReg,0x3D); //和Mifare卡通讯，CRC初始值0x6363，CRCPreset=01
WriteRawRC(TReloadRegL,30); //定时器重装值，分为两个8位寄存器，初始值都为0x00
WriteRawRC(TReloadRegH,0);
WriteRawRC(TModeReg,0x8D); //内部定时器的设置1000 1101,后四位为TPrescalerReg的高四位
WriteRawRC(TPrescalerReg,0x3E); //为TPregScaler低8位，Ftimer = 6.78MHZ/TPreScaler
WriteRawRC(TxAutoReg,0x40);
return MI_OK;
}
//
//设置RC632的工作方式
//
char M500PcdConfigISOType(u8 type){
if (type == 'A') //ISO14443_A
{
ClearBitMask(Status2Reg,0x08);
WriteRawRC(ModeReg,0x3D);//3
WriteRawRC(RxSelReg,0x86);//
WriteRawRC(RFCfgReg,0x7F); //4F
WriteRawRC(TReloadRegL,30);//tmoLength);// TReloadVal = 'h6a =tmoLength(dec)
WriteRawRC(TReloadRegH,0);
WriteRawRC(TModeReg,0x8D);
WriteRawRC(TPrescalerReg,0x3E);
delay_n10ms(1);
PcdAntennaOn();
}
else{ return -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
/
u8 ReadRawRC(u8 Address){
u8 i, ucAddr;
u8 ucResult=0;
MF522_SCK = 0;
MF522_NSS = 0;
ucAddr = ((Address<<1)&0x7E)|0x80;
for(i=8;i>0;i--)
{
MF522_SI = ((ucAddr&0x80)==0x80);
MF522_SCK = 1;
ucAddr <<= 1;
MF522_SCK = 0;
}
for(i=8;i>0;i--)
{
MF522_SCK = 1;
ucResult <<= 1;
ucResult|=(bit)MF522_SO;
MF522_SCK = 0;
}
MF522_NSS = 1;
MF522_SCK = 1;
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(u8 Address, u8 value){
u8 i, ucAddr;
MF522_SCK = 0;
MF522_NSS = 0;
ucAddr = ((Address<<1)&0x7E);
for(i=8;i>0;i--)
{
MF522_SI = ((ucAddr&0x80)==0x80);
MF522_SCK = 1;
ucAddr <<= 1;
MF522_SCK = 0;
}
for(i=8;i>0;i--)
{
MF522_SI = ((value&0x80)==0x80);
MF522_SCK = 1;
value <<= 1;
MF522_SCK = 0;
}
MF522_NSS = 1;
MF522_SCK = 1;
}
/
//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(u8 reg,u8 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(u8 reg,u8 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(u8 Command,
u8 *pInData,
u8 InLenByte,
u8 *pOutData,
u32 *pOutLenBit)
{
char status = MI_ERR;
u8 irqEn = 0x00;
u8 waitFor = 0x00;
u8 lastBits;
u8 n;
u32 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;//900,1100,1700,2000,2700
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(){
u8 i;
i = ReadRawRC(TxControlReg);
if (!(i & 0x03))
{
SetBitMask(TxControlReg, 0x03);
}
}
/
//关闭天线
/
void PcdAntennaOff()
{
ClearBitMask(TxControlReg, 0x03);
}
/
//功 能：扣款和充值
//参数说明: dd_mode[IN]：命令字
// 0xC0 = 扣款
// 0xC1 = 充值
// addr[IN]：钱包地址
// pValue[IN]：4字节增(减)值，低位在前
//返 回: 成功返回MI_OK
/
//char PcdValue(u8 dd_mode,u8 addr,u8 *pValue)
//{
// char status;
// u32 unLen;
// u8 i,ucComMF522Buf[MAXRLEN];
//
// ucComMF522Buf[0] = dd_mode;
// 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, pValue, 4);
// for (i=0; i<16; i++)
// { ucComMF522Buf[i] = *(pValue+i); }
// CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);
// unLen = 0;
// status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);
// if (status != MI_ERR)
// { status = MI_OK; }
// }
//
// if (status == MI_OK)
// {
// ucComMF522Buf[0] = PICC_TRANSFER;
// 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; }
// }
// return status;
//}
/*
/
//功 能：备份钱包
//参数说明: sourceaddr[IN]：源地址
// goaladdr[IN]：目标地址
//返 回: 成功返回MI_OK
/
char PcdBakValue(u8 sourceaddr, u8 goaladdr)
{
char status;
u32 unLen;
u8 ucComMF522Buf[MAXRLEN];
ucComMF522Buf[0] = PICC_RESTORE;
ucComMF522Buf[1] = sourceaddr;
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)
{
ucComMF522Buf[0] = 0;
ucComMF522Buf[1] = 0;
ucComMF522Buf[2] = 0;
ucComMF522Buf[3] = 0;
CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);
status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);
if (status != MI_ERR)
{ status = MI_OK; }
}
if (status != MI_OK)
{ return MI_ERR; }
ucComMF522Buf[0] = PICC_TRANSFER;
ucComMF522Buf[1] = goaladdr;
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; }
return status;
}
*/
#if 0
///
// Delay 10ms
///
void delay_n10ms(u32 _10ms)
{
#ifndef NO_TIMER2
RCAP2LH = RCAP2_10ms;
T2LH = RCAP2_10ms;
TR2 = TRUE;
while (_10ms--)
{
while (!TF2);
TF2 = FALSE;
}
TR2 = FALSE;
#else
while (_10ms--)
{
delay_50us(19);
if (CmdValid)
return;
delay_50us(20);
if (CmdValid)
return;
delay_50us(20);
if (CmdValid)
return;
delay_50us(20);
if (CmdValid)
return;
delay_50us(20);
if (CmdValid )
return;
delay_50us(20);
if (CmdValid)
return;
delay_50us(20);
if (CmdValid)
return;
delay_50us(20);
if (CmdValid)
return;
delay_50us(20);
if (CmdValid)
return;
delay_50us(19);
if (CmdValid)
return;
}
#endif
}
#endif
rc522.h文件
#ifndef RC522_H__
#define RC522_H__
/*
**********************************************************************
* 头文件包含
**********************************************************************
*/
#include "main.h"
typedef enum
{
false,
true,
}bool;
#define OSC_FREQ (22118400L)
#define RCAP2_50us (65536L - OSC_FREQ/40417L)
#define RCAP2_1ms (65536L - OSC_FREQ/2000L)
#define RCAP2_10ms (65536L - OSC_FREQ/1200L)
#define TIME0_500us (65536L - OSC_FREQ/8000L)
#define TIME0_10ms (65536L - OSC_FREQ/200)
/*
**********************************************************************
* 本地宏定义
**********************************************************************
*/
#define MAXRLEN 18
/
//Mifare_One卡片命令字
/
#define PICC_REQIDL 0x26 //寻天线区内未进入休眠状态
#define PICC_REQALL 0x52 //寻天线区内全部卡
#define PICC_ANTICOLL1 0x93 //选卡
#define PICC_ANTICOLL2 0x95 //防冲撞
#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命令字
/
#define PCD_IDLE 0x00 //取消当前命令
#define PCD_AUTHENT 0x0E //验证密钥
#define PCD_RECEIVE 0x08 //接收数据
#define PCD_TRANSMIT 0x04 //发送数据
#define PCD_TRANSCEIVE 0x0C //发送并接收数据
#define PCD_RESETPHASE 0x0F //复位
#define PCD_CALCCRC 0x03 //CRC计算
/
//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
/
//和MF522通讯时返回的错误代码
/
#define MI_OK 0
#define MI_NOTAGERR (-1)
#define MI_ERR (-2)
/*
**********************************************************************
* 外部函数原型声明
**********************************************************************
*/
char PcdReset(void);
void PcdAntennaOn(void);
void PcdAntennaOff(void);
char PcdRequest(u8 req_code,u8 *pTagType);
char PcdAnticoll(u8 *pSnr);
char PcdComMF522(u8 Command,
u8 *pInData,
u8 InLenByte,
u8 *pOutData,
u32 *pOutLenBit);
void WriteRawRC(u8 Address,u8 value);
u8 ReadRawRC(u8 Address);
void SetBitMask(u8 reg,u8 mask);
void ClearBitMask(u8 reg,u8 mask);
char M500PcdConfigISOType(u8 type);
void delay_10ms(u32 _10ms);
char PcdSelect(u8 *pSnr);
char PcdAuthState(u8 auth_mode,u8 addr,u8 *pKey,u8 *pSnr);
char PcdRead(u8 addr,u8 *pData);
char PcdWrite(u8 addr,u8 *pData);
char PcdValue(u8 dd_mode,u8 addr,u8 *pValue);
char PcdBakValue(u8 sourceaddr, u8 goaladdr);
void CalulateCRC(u8 *pIndata,u8 len,u8 *pOutData);
#endif
IC.c文件
#include "IC.h"
#include "rc522.h"
#include "key.h"
#include "uart.h"
#include <string.h>
#include "beep.h"
#include "delay.h"
u8 UID2[5] = {0x00,0x01,0x02,0x03};
/*IC初始化*/
void IC_Init(void)
{
PcdReset(); //复位RC522
PcdAntennaOff(); //关天线
PcdAntennaOn(); //开天线
M500PcdConfigISOType('A');
}
/*读卡 读取成功回填卡号*/
bool Read_IC_Card(u8 *DesUid)
{
u8 temp[4],UID[5];
if (PcdRequest(0x52, temp) == MI_OK)
{
if (PcdAnticoll(UID) == MI_OK)//识别到有卡
{
strcpy((char *)DesUid,(char *)UID);
return true;
}
}
return false;
}
/*比对卡号*/
bool Cmp_IC_Card(u8 *DesUid,u8 *SrcUid)
{
if(!strcmp((char *)DesUid,(char *)SrcUid))
{
return true;
}
return false;
}
/*识别卡号运行*/
void IC_Card_Run(void)
{
u8 UID[5];
u16 keyval = NOKEY_PRES;
bool res;
while(1)
{
res = Read_IC_Card(UID);
if(res == true)
{
Uart_Send_Data("读卡成功\r\n");
res = Cmp_IC_Card(UID2,UID);
if(res == true)
{
Uart_Send_Data("卡号正确\r\n");
Buzz_Times(1);
JDQ = 0;//打开继电器
Delay1s();
Delay1s();
Delay1s();
JDQ = 1;//继电器
}
else
{
Uart_Send_Data("卡号错误\r\n");
Buzz_Times(3);
}
}
keyval = key_scan();
if(keyval == KEY16_PRES)
break;
}
}
/*读卡*/
void IC_Card_Read(void)
{
u8 UID[5];
u16 keyval = NOKEY_PRES;
bool res;
while(1)
{
res = Read_IC_Card(UID);
if(res == true)
{
strcpy((char *)UID2,(char *)UID);
Buzz_Times(1);
Delay1s();
}
keyval = key_scan();
if(keyval == KEY16_PRES)
break;
}
}
IC.h
#ifndef IC_H__
#define IC_H__
#include "main.h"
void IC_Init(void);
bool Read_IC_Card(u8 *DesUid);
bool Cmp_IC_Card(u8 *DesUid,u8 *SrcUid);
void IC_Card_Run(void);
void IC_Card_Read(void);
#endif
以上就是RC522的相关驱动代码，在使用时只需要先调用IC_Init初始化函数进行初始化；IC_Card_Run和IC_Card_Read函数为测试函数，测试时需要先调用IC_Card_Read读取卡号，再调用IC_Card_Run函数。
