RC522射频卡读写模块驱动(仅读取)

说明

更改了网上的源代码,仅保留了读取序列号并通过串口回传的功能。版本号:V1
感谢 https://blog.csdn.net/qq_28877125/article/details/80437095

测试结果

main


#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "lcd.h"
#include "RC522.h"

int main(void)
{ 
	unsigned char ID[4],i;

	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置系统中断优先级分组2
	delay_init(168);      //初始化延时函数
	uart_init(115200);	  //初始化串口波特率为115200
	RC522_Init();

  	while(1) 
	{		
		if(RC522_ReadCard(ID))
		{
			for(i=0;i<4;i++)
			{
				printf("%x",ID[i]);
			}
			printf("\r\n");
		}
	}
}

RC522.h

/******************************************************************************
* @File     RC522.h
* @Author   Velscode
* @Date     2019/01
* @Email    velscode@gmail.com
* @Version  1.0
******************************************************************************/
#ifndef _RC522_H_
#define _RC522_H_

#include "sys.h" 
#include "stm32f4xx_it.h"

/*******************************
 * 连线说明:
 * 1 -- SDA  <----->PA4
 * 2 -- SCK  <----->PA5
 * 3 -- MOSI <----->PA7
 * 4 -- MISO <----->PA6
 * 5 -- 悬空
 * 6 -- GND <----->GND
 * 7 -- RST <----->PB0
 * 8 -- VCC <----->VCC
************************************/

/* IO口宏定义 ----------------------------------------------------------------------- */
#define          RC522_CS_Enable()         GPIO_ResetBits( GPIOA, GPIO_Pin_4 )
#define          RC522_CS_Disable()        GPIO_SetBits  ( GPIOA, GPIO_Pin_4 )

#define          RC522_Reset_Enable()      GPIO_ResetBits( GPIOB, GPIO_Pin_0 )
#define          RC522_Reset_Disable()     GPIO_SetBits  ( GPIOB, GPIO_Pin_0 )
 
#define          RC522_SCK_0()             GPIO_ResetBits( GPIOA, GPIO_Pin_5 )
#define          RC522_SCK_1()             GPIO_SetBits  ( GPIOA, GPIO_Pin_5 )

#define          RC522_MOSI_0()            GPIO_ResetBits( GPIOA, GPIO_Pin_7 )
#define          RC522_MOSI_1()            GPIO_SetBits  ( GPIOA, GPIO_Pin_7 )

#define          RC522_MISO_GET()          GPIO_ReadInputDataBit ( GPIOA, GPIO_Pin_6 )

/* 函数声明 ---------------------------------------------------- */
u8   RC522_isConnected( void );	                //检查模块连接
void RC522_Init ( void );		                //初始化
void RC522_WriteRawRC ( u8 Address, u8 Value );	//写寄存器
u8   RC522_ReadRawRC  ( u8 Address );			//读寄存器
u8   RC522_ReadCard( unsigned char *ID );		//读卡


/* 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


/* ifare_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               //防冲撞
#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 FIFO--------------------------- */
#define DEF_FIFO_LENGTH       64
#define MAXRLEN               18

/* MF522寄存器 ------------------------- */
// 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

/* 通信返回码 ----------------------- */
#define 	MI_OK                 0
#define 	MI_NOTAGERR           1
#define 	MI_ERR                2

#endif
/* End of File ------------------------------------------------------------- */

RC522.c

/******************************************************************************
* @File     RC522.c
* @Author   Velscode
* @Date     2019/01
* @Email    velscode@gmail.com
* @Version  1.0
******************************************************************************/
#include "sys.h"
#include "RC522.h"
#include "delay.h"


char          PcdAnticoll ( u8 * pSnr );
void          PcdAntennaOn ( void );
char          PcdComMF522 ( u8 ucCommand, u8 * pInData, u8 ucInLenByte, u8 * pOutData, u32 * pOutLenBit );

void          SetBitMask ( u8 Reg, u8 Mask );
void          ClearBitMask ( u8 Reg, u8 Mask );

void          SPI_RC522_SendByte ( u8 byte );
unsigned char SPI_RC522_ReadByte ( void );

/********************************************
* @Name  RC522_ReadCard
* @Brief 读取射频卡
* @Para  如果读取成功,ID中存储的就是卡序列号
* @Retun 1 - 读取到ID卡
*        0 - 未读取到ID卡
********************************************/
u8 RC522_ReadCard( unsigned char *ID )
{
	u8 state = 0x00;
	  
    u8 ucComMF522Buf [ MAXRLEN ]; 
    u32 ulLen;

    ClearBitMask ( 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_WriteRawRC ( BitFramingReg, 0x07 );	//发送的最后一个字节的 七位
    SetBitMask ( 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 ] = PICC_REQALL;		//存入 卡片命令字

    state = PcdComMF522 ( PCD_TRANSCEIVE,	ucComMF522Buf, 1, ucComMF522Buf, & ulLen );	//寻卡  
	
	if(state==MI_OK)//寻卡成功
    {
        state = MI_ERR;
        state = PcdAnticoll(ID);//防冲撞	      
    }
	
	if( state == MI_OK )
	{
		return 1;
	}
	else
	{
		return 0;
	}
}

/***********************************
* @Name  RC522_isConnected()
* @Brief 检查RC522模块是否连接
* @Retun 1 - 连接成功
*        0 - 连接失败
************************************/
u8 RC522_isConnected(void)
{
	if(RC522_ReadRawRC(VersionReg)==0x92)
	{
		return 1;
	}
	else
	{
		return 0;
	}
}

/*******************************
* @Name RC522_Init()
* @Brief 初始化RC522
************************************/
void RC522_Init( void )
{
	// GPIO初始化 ------------------------------------------------------------------------------
	GPIO_InitTypeDef GPIO_InitStructure;                                        //结构体定义
	
	RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB , ENABLE );//使能GPIOA\B时钟
	
	GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_OUT;			//输出模式
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;			//推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;		//100MHZ速率
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;		//不拉
	
	// CS
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;	 
    GPIO_Init(GPIOA, &GPIO_InitStructure);					//使用给定参数初始化引脚
    
    // SCK
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;	 
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    
    // MOSI
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;	 
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    
    // RST
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;	 
    GPIO_Init(GPIOB, &GPIO_InitStructure);
	
	// MISO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;	 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;	//MISO引脚配置为输入模式,其它不变
    GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	//其它操作 ----------------------------------
	RC522_Reset_Disable();
	RC522_CS_Disable();
	
	//复位RC522 ---------------------------------
	RC522_Reset_Disable();
    delay_us ( 1 );
	
    RC522_Reset_Enable();
    delay_us ( 1 );

    RC522_Reset_Disable();
    delay_us ( 1 );

    RC522_WriteRawRC ( CommandReg, 0x0f );

    while ( RC522_ReadRawRC ( CommandReg ) & 0x10 );

    delay_us ( 1 );

    RC522_WriteRawRC ( ModeReg, 0x3D );            //定义发送和接收常用模式 和Mifare卡通讯,CRC初始值0x6363

    RC522_WriteRawRC ( TReloadRegL, 30 );          //16位定时器低位    
    RC522_WriteRawRC ( TReloadRegH, 0 );			 //16位定时器高位

    RC522_WriteRawRC ( TModeReg, 0x8D );			 //定义内部定时器的设置

    RC522_WriteRawRC ( TPrescalerReg, 0x3E );		 //设置定时器分频系数

    RC522_WriteRawRC ( TxAutoReg, 0x40 );			 //调制发送信号为100%ASK	
	
	//设置RC522工作方式为ISO14443_A标准 -----------------------------------------------------
	ClearBitMask ( Status2Reg, 0x08 );
		
	RC522_WriteRawRC ( ModeReg, 0x3D );//3F
	
	RC522_WriteRawRC ( RxSelReg, 0x86 );//84
	
	RC522_WriteRawRC( RFCfgReg, 0x7F );   //4F
	
	RC522_WriteRawRC( TReloadRegL, 30 );//tmoLength);// TReloadVal = 'h6a =tmoLength(dec) 
	
	RC522_WriteRawRC ( TReloadRegH, 0 );
	
	RC522_WriteRawRC ( TModeReg, 0x8D );
	
	RC522_WriteRawRC ( TPrescalerReg, 0x3E );
	
	delay_us ( 20 );
	
	PcdAntennaOn ();//开天线
}

/*********************************************
 * @Name   SPI_RC522_SendByte
 * @brief  向RC522发送1 字节数据
 * @input  byte,要发送的数据
 * @note   RC522.c内部函数
 *********************************************/
void SPI_RC522_SendByte ( u8 byte )
{
    unsigned char i;
	
    for( i = 0; i < 8; i++ )
    {     
			if ( byte & 0x80 )
					RC522_MOSI_1();
			else 
					RC522_MOSI_0();

			delay_us ( 50 );
		
			RC522_SCK_0 ();

			delay_us ( 50 );
			 
			RC522_SCK_1();

			delay_us ( 50 );
			 
			byte <<= 1; 
    } 
}

/*********************************************
 * @Name    SPI_RC522_ReadByte
 * @Brief   读取RC522 1字节数据
 * @Para    RC522回传的数据
 * @Note    RC522.c内部函数
 *********************************************/
u8 SPI_RC522_ReadByte ( void )
{
	u8 i;
	u8 SPI_Data;

	for( i = 0; i < 8; i++ )
	{
		SPI_Data <<= 1;
 
		RC522_SCK_0();
		delay_us ( 50 );
	
		if ( RC522_MISO_GET() == 1)
				SPI_Data |= 0x01;
		delay_us ( 50 );

		RC522_SCK_1();
		delay_us ( 50 );
		
	}
	return SPI_Data;
}

/*********************************************
 * @Name    RC522_WriteRawRC
 * @Brief   写RC522寄存器
 * @Para    Address 寄存器地址
 * @Para    Value   要写入的值
 *********************************************/
void RC522_WriteRawRC ( u8 Address, u8 Value )
{  
	u8 Addr;

	Addr = ( Address << 1 ) & 0x7E;
	
	RC522_CS_Enable();
	
	SPI_RC522_SendByte ( Addr );
	
	SPI_RC522_SendByte ( Value );
	
	RC522_CS_Disable();	
}

/*********************************************
 * @Name    RC522_ReadRawRC
 * @Brief   读RC522寄存器
 * @Para    Address 寄存器地址
 * @Retun   寄存器中的知
 *********************************************/
u8 RC522_ReadRawRC ( u8 Address )
{
	u8 Addr, Value;
	
	
	Addr = ( ( Address << 1 ) & 0x7E ) | 0x80;
	
	RC522_CS_Enable();
	
	SPI_RC522_SendByte ( Addr );
	
	Value = SPI_RC522_ReadByte ();
	
	RC522_CS_Disable();

	return Value;
}

/*********************************************
 * @Name    SetBitMask
 * @Brief   设置寄存器指定位
 * @Para    Reg  寄存器地址
 * @Para    Mask 
 *********************************************/
void SetBitMask ( u8 Reg, u8 Mask )  
{
    u8 Temp;

    Temp = RC522_ReadRawRC ( Reg );
	
    RC522_WriteRawRC ( Reg, Temp | Mask );         // set bit mask

}


/*********************************************
 * @Name    ClearBitMask
 * @Brief   清除寄存器指定位
 * @Para    Reg  寄存器地址
 * @Para    Mask 
 *********************************************/
void ClearBitMask ( u8 Reg, u8 Mask )  
{
    u8 Temp;

    Temp = RC522_ReadRawRC ( Reg );
	
    RC522_WriteRawRC ( Reg, Temp & ( ~ Mask) );  // clear bit mask
}

/*********************************************
 * @Name    PcdAntennaOn
 * @Brief   开启天线
 * @Note	有待评估该函数是否必须
 *********************************************/
void PcdAntennaOn ( void )
{
    u8 uc;

    uc = RC522_ReadRawRC ( TxControlReg );
	
    if ( ! ( uc & 0x03 ) )
			SetBitMask(TxControlReg, 0x03);
	
}

/*
 * 函数名:PcdAnticoll
 * 描述  :防冲撞
 * 输入  :pSnr,卡片序列号,4字节
 * 返回  : 状态值
 *         = MI_OK,成功
 * 调用  :外部调用
 */
char PcdAnticoll ( u8 * pSnr )
{
    char cStatus;
    u8 uc, ucSnr_check = 0;
    u8 ucComMF522Buf [ MAXRLEN ]; 
	u32 ulLen;

    ClearBitMask ( Status2Reg, 0x08 );		//清MFCryptol On位 只有成功执行MFAuthent命令后,该位才能置位
    RC522_WriteRawRC ( BitFramingReg, 0x00);		//清理寄存器 停止收发
    ClearBitMask ( 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;
   
    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;    
				 
    }
    
    SetBitMask ( CollReg, 0x80 );

    return cStatus;
	
}


/*
 * 函数名:PcdComMF522
 * 描述  :通过RC522和ISO14443卡通讯
 * 输入  :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
 * 返回  : 状态值
 *         = MI_OK,成功
 * 调用  :内部调用
 */
char PcdComMF522 ( u8 ucCommand, u8 * pInData, u8 ucInLenByte, u8 * pOutData, u32 * pOutLenBit )		
{
    char cStatus = MI_ERR;
    u8 ucIrqEn   = 0x00;
    u8 ucWaitFor = 0x00;
    u8 ucLastBits;
    u8 ucN;
    u32 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_WriteRawRC ( ComIEnReg, ucIrqEn | 0x80 );		//IRqInv置位管脚IRQ与Status1Reg的IRq位的值相反 
    ClearBitMask ( ComIrqReg, 0x80 );			//Set1该位清零时,CommIRqReg的屏蔽位清零
    RC522_WriteRawRC ( CommandReg, PCD_IDLE );		//写空闲命令
    SetBitMask ( 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_WriteRawRC ( FIFODataReg, pInData [ ul ] );    		//写数据进FIFOdata
			
    RC522_WriteRawRC ( CommandReg, ucCommand );					//写命令
   
    
    if ( ucCommand == PCD_TRANSCEIVE )
			SetBitMask(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_ReadRawRC ( 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
		
    ClearBitMask ( BitFramingReg, 0x80 );					//清理允许StartSend位
		
    if ( ul != 0 )
    {
		if ( ! (( RC522_ReadRawRC ( 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_ReadRawRC ( FIFOLevelReg );			//读FIFO中保存的字节数
				
				ucLastBits = RC522_ReadRawRC ( 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_ReadRawRC ( FIFODataReg );   
			}		
        }
			else
				cStatus = MI_ERR;   
    }
   
   SetBitMask ( ControlReg, 0x80 );           // stop timer now
   RC522_WriteRawRC ( CommandReg, PCD_IDLE ); 
	
   return cStatus;

}

/* End of File ------------------------------------------------------------- */

posted @ 2019-01-19 14:46  Velscode  阅读(3698)  评论(0编辑  收藏