STM32F103学习笔记——RC522射频卡

本文最后更新于:2022年5月29日 上午

使用STM32F103读取识别RFID-RC522模块。移植了野火的代码,去掉显示屏,使用串口显示调试信息。

一、RFID-RC522模块介绍

简单介绍:本模块可直接装入各种读卡器模具。模块采用电压为3.3V,通过SPI接口简单的几条线就可以直接与用户任何CPU主板相连接通信,可以保证模块稳定可靠的工作、读卡距离远。

详细介绍自行下载资料查阅。

Qvlif1.png

二、程序代码

1,RFID-RC522模块

(1)rc522.h
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#ifndef __RC522_H
#define __RC522_H

#include "stm32f10x.h"
#include "systick.h"


/////////////////////////////////////////////////////////////////////
//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

/////////////////////////////////////////////////////////////////////
//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 //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长度定义
/////////////////////////////////////////////////////////////////////
#define DEF_FIFO_LENGTH 64 //FIFO size=64byte
#define MAXRLEN 18

/////////////////////////////////////////////////////////////////////
//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 0x26
#define MI_NOTAGERR 0xcc
#define MI_ERR 0xbb



/*********************************** RC522 引脚定义 *********************************************/
#define RC522_GPIO_CS_CLK_FUN RCC_APB2PeriphClockCmd
#define RC522_GPIO_CS_CLK RCC_APB2Periph_GPIOA
#define RC522_GPIO_CS_PORT GPIOA
#define RC522_GPIO_CS_PIN GPIO_Pin_4
#define RC522_GPIO_CS_Mode GPIO_Mode_Out_PP

#define RC522_GPIO_SCK_CLK_FUN RCC_APB2PeriphClockCmd
#define RC522_GPIO_SCK_CLK RCC_APB2Periph_GPIOA
#define RC522_GPIO_SCK_PORT GPIOA
#define RC522_GPIO_SCK_PIN GPIO_Pin_5
#define RC522_GPIO_SCK_Mode GPIO_Mode_Out_PP

#define RC522_GPIO_MOSI_CLK_FUN RCC_APB2PeriphClockCmd
#define RC522_GPIO_MOSI_CLK RCC_APB2Periph_GPIOA
#define RC522_GPIO_MOSI_PORT GPIOA
#define RC522_GPIO_MOSI_PIN GPIO_Pin_7
#define RC522_GPIO_MOSI_Mode GPIO_Mode_Out_PP

#define RC522_GPIO_MISO_CLK_FUN RCC_APB2PeriphClockCmd
#define RC522_GPIO_MISO_CLK RCC_APB2Periph_GPIOA
#define RC522_GPIO_MISO_PORT GPIOA
#define RC522_GPIO_MISO_PIN GPIO_Pin_6
#define RC522_GPIO_MISO_Mode GPIO_Mode_IN_FLOATING

#define RC522_GPIO_RST_CLK_FUN RCC_APB2PeriphClockCmd
#define RC522_GPIO_RST_CLK RCC_APB2Periph_GPIOB
#define RC522_GPIO_RST_PORT GPIOB
#define RC522_GPIO_RST_PIN GPIO_Pin_0
#define RC522_GPIO_RST_Mode GPIO_Mode_Out_PP



/*********************************** RC522 函数宏定义*********************************************/
#define RC522_CS_Enable() GPIO_ResetBits ( RC522_GPIO_CS_PORT, RC522_GPIO_CS_PIN )
#define RC522_CS_Disable() GPIO_SetBits ( RC522_GPIO_CS_PORT, RC522_GPIO_CS_PIN )

#define RC522_Reset_Enable() GPIO_ResetBits( RC522_GPIO_RST_PORT, RC522_GPIO_RST_PIN )
#define RC522_Reset_Disable() GPIO_SetBits ( RC522_GPIO_RST_PORT, RC522_GPIO_RST_PIN )

#define RC522_SCK_0() GPIO_ResetBits( RC522_GPIO_SCK_PORT, RC522_GPIO_SCK_PIN )
#define RC522_SCK_1() GPIO_SetBits ( RC522_GPIO_SCK_PORT, RC522_GPIO_SCK_PIN )

#define RC522_MOSI_0() GPIO_ResetBits( RC522_GPIO_MOSI_PORT, RC522_GPIO_MOSI_PIN )
#define RC522_MOSI_1() GPIO_SetBits ( RC522_GPIO_MOSI_PORT, RC522_GPIO_MOSI_PIN )

#define RC522_MISO_GET() GPIO_ReadInputDataBit ( RC522_GPIO_MISO_PORT, RC522_GPIO_MISO_PIN )


/*********************************** 函数 *********************************************/
void RC522_Init( void ); // 初始化
void PcdReset( void ); // 复位
void M500PcdConfigISOType( u8 type ); // 工作方式
char PcdRequest( u8 req_code, u8 * pTagType ); // 寻卡
char PcdAnticoll( u8 * pSnr); // 读卡号


#endif /* __RC522_H */

(2)rc522.c
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/**
******************************************************************************
* @file uasrt.c
* @author Soso
* @date 2019-12-17
* @brief USART1(AS608_USART) and USART3(DEBUG_USART) driver configuration code.
Redirect c library printf function to USART3 port.
******************************************************************************
*/

#include "rc522.h"

#define RC522_DELAY() delay_us(200)


static void RC522_SPI_Config ( void )
{
/* SPI_InitTypeDef SPI_InitStructure */
GPIO_InitTypeDef GPIO_InitStructure;

/*!< Configure SPI_RC522_SPI pins: CS */
RC522_GPIO_CS_CLK_FUN ( RC522_GPIO_CS_CLK, ENABLE );
GPIO_InitStructure.GPIO_Pin = RC522_GPIO_CS_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = RC522_GPIO_CS_Mode;
GPIO_Init(RC522_GPIO_CS_PORT, &GPIO_InitStructure);

/*!< Configure SPI_RC522_SPI pins: SCK */
RC522_GPIO_SCK_CLK_FUN ( RC522_GPIO_SCK_CLK, ENABLE );
GPIO_InitStructure.GPIO_Pin = RC522_GPIO_SCK_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = RC522_GPIO_SCK_Mode;
GPIO_Init(RC522_GPIO_SCK_PORT, &GPIO_InitStructure);

/*!< Configure SPI_RC522_SPI pins: MOSI */
RC522_GPIO_MOSI_CLK_FUN ( RC522_GPIO_MOSI_CLK, ENABLE );
GPIO_InitStructure.GPIO_Pin = RC522_GPIO_MOSI_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = RC522_GPIO_MOSI_Mode;
GPIO_Init(RC522_GPIO_MOSI_PORT, &GPIO_InitStructure);

/*!< Configure SPI_RC522_SPI pins: MISO */
RC522_GPIO_MISO_CLK_FUN ( RC522_GPIO_MISO_CLK, ENABLE );
GPIO_InitStructure.GPIO_Pin = RC522_GPIO_MISO_PIN;
GPIO_InitStructure.GPIO_Mode = RC522_GPIO_MISO_Mode;
GPIO_Init(RC522_GPIO_MISO_PORT, &GPIO_InitStructure);


/*!< Configure SPI_RC522_SPI pins: RST */
RC522_GPIO_RST_CLK_FUN ( RC522_GPIO_RST_CLK, ENABLE );
GPIO_InitStructure.GPIO_Pin = RC522_GPIO_RST_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = RC522_GPIO_RST_Mode;
GPIO_Init(RC522_GPIO_RST_PORT, &GPIO_InitStructure);

}

void RC522_Init( void )
{
RC522_SPI_Config();
RC522_Reset_Disable();
RC522_CS_Disable();
PcdReset(); // 复位
M500PcdConfigISOType('A'); //设置工作方式
}


/*
* 函数名:SPI_RC522_SendByte
* 描述 :向RC522发送1 Byte 数据
* 输入 :byte,要发送的数据
* 返回 : RC522返回的数据
* 调用 :内部调用
*/
void SPI_RC522_SendByte ( u8 byte )
{
u8 counter;


for(counter=0;counter<8;counter++)
{
if ( byte & 0x80 )
RC522_MOSI_1 ();
else
RC522_MOSI_0 ();

RC522_DELAY();
RC522_SCK_0 ();
RC522_DELAY();
RC522_SCK_1();
RC522_DELAY();

byte <<= 1;
}

}

/*
* 函数名:SPI_RC522_ReadByte
* 描述 :从RC522发送1 Byte 数据
* 输入 :无
* 返回 : RC522返回的数据
* 调用 :内部调用
*/
u8 SPI_RC522_ReadByte ( void )
{
u8 counter;
u8 SPI_Data;

for(counter=0;counter<8;counter++)
{
SPI_Data <<= 1;

RC522_SCK_0 ();
RC522_DELAY();

if(RC522_MISO_GET() == 1)
SPI_Data |= 0x01;

RC522_DELAY();
RC522_SCK_1 ();
RC522_DELAY();
}

return SPI_Data;
}


/*
* 函数名:ReadRawRC
* 描述 :读RC522寄存器
* 输入 :ucAddress,寄存器地址
* 返回 : 寄存器的当前值
* 调用 :内部调用
*/
u8 ReadRawRC ( u8 ucAddress )
{
u8 ucAddr, ucReturn;


ucAddr = ( ( ucAddress << 1 ) & 0x7E ) | 0x80;

RC522_CS_Enable();

SPI_RC522_SendByte ( ucAddr );

ucReturn = SPI_RC522_ReadByte ();

RC522_CS_Disable();


return ucReturn;
}


/*
* 函数名:WriteRawRC
* 描述 :写RC522寄存器
* 输入 :ucAddress,寄存器地址
* ucValue,写入寄存器的值
* 返回 : 无
* 调用 :内部调用
*/
void WriteRawRC ( u8 ucAddress, u8 ucValue )
{
u8 ucAddr;


ucAddr = ( ucAddress << 1 ) & 0x7E;

RC522_CS_Enable();

SPI_RC522_SendByte ( ucAddr );

SPI_RC522_SendByte ( ucValue );

RC522_CS_Disable();
}


/*
* 函数名:SetBitMask
* 描述 :对RC522寄存器置位
* 输入 :ucReg,寄存器地址
* ucMask,置位值
* 返回 : 无
* 调用 :内部调用
*/
void SetBitMask ( u8 ucReg, u8 ucMask )
{
u8 ucTemp;

ucTemp = ReadRawRC ( ucReg );
WriteRawRC ( ucReg, ucTemp | ucMask ); // set bit mask
}


/*
* 函数名:ClearBitMask
* 描述 :对RC522寄存器清位
* 输入 :ucReg,寄存器地址
* ucMask,清位值
* 返回 : 无
* 调用 :内部调用
*/
void ClearBitMask ( u8 ucReg, u8 ucMask )
{
u8 ucTemp;

ucTemp = ReadRawRC ( ucReg );
WriteRawRC ( ucReg, ucTemp & ( ~ ucMask) ); // clear bit mask
}


/*
* 函数名:PcdAntennaOn
* 描述 :开启天线
* 输入 :无
* 返回 : 无
* 调用 :内部调用
*/
void PcdAntennaOn ( void )
{
u8 uc;

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


/*
* 函数名:PcdAntennaOff
* 描述 :开启天线
* 输入 :无
* 返回 : 无
* 调用 :内部调用
*/
void PcdAntennaOff ( void )
{
ClearBitMask ( TxControlReg, 0x03 );
}


/*
* 函数名:PcdRese
* 描述 :复位RC522
* 输入 :无
* 返回 : 无
* 调用 :外部调用
*/
void PcdReset ( void )
{
RC522_Reset_Disable();

delay_us ( 1 );

RC522_Reset_Enable();

delay_us ( 1 );

RC522_Reset_Disable();

delay_us ( 1 );

WriteRawRC ( CommandReg, 0x0f );

while ( ReadRawRC ( CommandReg ) & 0x10 );

delay_us ( 1 );

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

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

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

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

WriteRawRC ( TxAutoReg, 0x40 ); //调制发送信号为100%ASK
}


/*
* 函数名:M500PcdConfigISOType
* 描述 :设置RC522的工作方式
* 输入 :ucType,工作方式
* 返回 : 无
* 调用 :外部调用
*/
void M500PcdConfigISOType ( u8 ucType )
{
if(ucType == 'A') //ISO14443_A
{
ClearBitMask ( Status2Reg, 0x08 );

WriteRawRC ( ModeReg, 0x3D ); //3F

WriteRawRC ( RxSelReg, 0x86 ); //84

WriteRawRC( RFCfgReg, 0x7F ); //4F

WriteRawRC( TReloadRegL, 30 ); // TReloadVal = 'h6a =tmoLength(dec)

WriteRawRC ( TReloadRegH, 0 );

WriteRawRC ( TModeReg, 0x8D );

WriteRawRC ( TPrescalerReg, 0x3E );

delay_us ( 2 );

PcdAntennaOn ();//开天线
}
}


/*
* 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;

}

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
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 ++ )
WriteRawRC ( FIFODataReg, pInData [ ul ] ); //写数据进FIFOdata

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 = 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 ( ! ( 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 = ReadRawRC ( FIFOLevelReg ); //读FIFO中保存的字节数

ucLastBits = 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 ] = ReadRawRC ( FIFODataReg );
}
}
else
cStatus = MI_ERR;
}

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

return cStatus;
}


/*
* 函数名:PcdRequest
* 描述 :寻卡
* 输入 :ucReq_code,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,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 : 状态值
* = MI_OK,成功
* 调用 :外部调用
*/
char PcdRequest ( u8 ucReq_code, u8 * pTagType )
{
char cStatus;
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
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 ] = ucReq_code; //存入 卡片命令字

cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 1, ucComMF522Buf, & ulLen ); //寻卡

if((cStatus == MI_OK) && (ulLen == 0x10)) //寻卡成功返回卡类型
{
*pTagType = ucComMF522Buf[0];
*(pTagType + 1) = ucComMF522Buf[1];
}
else
cStatus = MI_ERR;

return cStatus;
}


/*
* 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
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:CalulateCRC
* 描述 :用RC522计算CRC16
* 输入 :pIndata,计算CRC16的数组
* ucLen,计算CRC16的数组字节长度
* pOutData,存放计算结果存放的首地址
* 返回 : 无
* 调用 :内部调用
*/
void CalulateCRC ( u8 * pIndata, u8 ucLen, u8 * pOutData )
{
u8 uc, ucN;

ClearBitMask(DivIrqReg,0x04);
WriteRawRC(CommandReg,PCD_IDLE);
SetBitMask(FIFOLevelReg,0x80);

for ( uc = 0; uc < ucLen; uc ++)
WriteRawRC ( FIFODataReg, * ( pIndata + uc ) );

WriteRawRC ( CommandReg, PCD_CALCCRC );

uc = 0xFF;

do
{
ucN = ReadRawRC ( DivIrqReg );
uc --;
} while ( ( uc != 0 ) && ! ( ucN & 0x04 ) );

pOutData [ 0 ] = ReadRawRC ( CRCResultRegL );
pOutData [ 1 ] = ReadRawRC ( CRCResultRegM );
}


/*
* 函数名:PcdSelect
* 描述 :选定卡片
* 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 PcdSelect ( u8 * pSnr )
{
char ucN;
u8 uc;
u8 ucComMF522Buf [ MAXRLEN ];
u32 ulLen;

ucComMF522Buf [ 0 ] = PICC_ANTICOLL1;
ucComMF522Buf [ 1 ] = 0x70;
ucComMF522Buf [ 6 ] = 0;

for ( uc = 0; uc < 4; uc ++ )
{
ucComMF522Buf [ uc + 2 ] = * ( pSnr + uc );
ucComMF522Buf [ 6 ] ^= * ( pSnr + uc );
}

CalulateCRC ( ucComMF522Buf, 7, & ucComMF522Buf [ 7 ] );

ClearBitMask ( Status2Reg, 0x08 );

ucN = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 9, ucComMF522Buf, & ulLen );

if ( ( ucN == MI_OK ) && ( ulLen == 0x18 ) )
ucN = MI_OK;
else
ucN = MI_ERR;

return ucN;
}


/*
* 函数名:PcdAuthState
* 描述 :验证卡片密码
* 输入 :ucAuth_mode,密码验证模式
* = 0x60,验证A密钥
* = 0x61,验证B密钥
* u8 ucAddr,块地址
* pKey,密码
* 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 PcdAuthState ( u8 ucAuth_mode, u8 ucAddr, u8 * pKey, u8 * pSnr )
{
char cStatus;
u8 uc, ucComMF522Buf [ MAXRLEN ];
u32 ulLen;


ucComMF522Buf [ 0 ] = ucAuth_mode;
ucComMF522Buf [ 1 ] = ucAddr;

for ( uc = 0; uc < 6; uc ++ )
ucComMF522Buf [ uc + 2 ] = * ( pKey + uc );

for ( uc = 0; uc < 6; uc ++ )
ucComMF522Buf [ uc + 8 ] = * ( pSnr + uc );

cStatus = PcdComMF522 ( PCD_AUTHENT, ucComMF522Buf, 12, ucComMF522Buf, & ulLen );

if ( ( cStatus != MI_OK ) || ( ! ( ReadRawRC ( Status2Reg ) & 0x08 ) ) )
cStatus = MI_ERR;

return cStatus;
}


/*
* 函数名:PcdWrite
* 描述 :写数据到M1卡一块
* 输入 :u8 ucAddr,块地址
* pData,写入的数据,16字节
* 返回 : 状态值
* = MI_OK,成功
* 调用 :外部调用
*/
char PcdWrite ( u8 ucAddr, u8 * pData )
{
char cStatus;
u8 uc, ucComMF522Buf [ MAXRLEN ];
u32 ulLen;

ucComMF522Buf [ 0 ] = PICC_WRITE;
ucComMF522Buf [ 1 ] = ucAddr;

CalulateCRC ( ucComMF522Buf, 2, & ucComMF522Buf [ 2 ] );

cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 4, ucComMF522Buf, & ulLen );

if ( ( cStatus != MI_OK ) || ( ulLen != 4 ) || ( ( ucComMF522Buf [ 0 ] & 0x0F ) != 0x0A ) )
cStatus = MI_ERR;

if ( cStatus == MI_OK )
{
//memcpy(ucComMF522Buf, pData, 16);
for ( uc = 0; uc < 16; uc ++ )
ucComMF522Buf [ uc ] = * ( pData + uc );

CalulateCRC ( ucComMF522Buf, 16, & ucComMF522Buf [ 16 ] );

cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 18, ucComMF522Buf, & ulLen );

if ( ( cStatus != MI_OK ) || ( ulLen != 4 ) || ( ( ucComMF522Buf [ 0 ] & 0x0F ) != 0x0A ) )
cStatus = MI_ERR;
}

return cStatus;
}


/*
* 函数名:PcdRead
* 描述 :读取M1卡一块数据
* 输入 :u8 ucAddr,块地址
* pData,读出的数据,16字节
* 返回 : 状态值
* = MI_OK,成功
* 调用 :外部调用
*/
char PcdRead ( u8 ucAddr, u8 * pData )
{
char cStatus;
u8 uc, ucComMF522Buf [ MAXRLEN ];
u32 ulLen;

ucComMF522Buf [ 0 ] = PICC_READ;
ucComMF522Buf [ 1 ] = ucAddr;

CalulateCRC ( ucComMF522Buf, 2, & ucComMF522Buf [ 2 ] );

cStatus = PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 4, ucComMF522Buf, & ulLen );

if ( ( cStatus == MI_OK ) && ( ulLen == 0x90 ) )
{
for ( uc = 0; uc < 16; uc ++ )
*( pData + uc ) = ucComMF522Buf [ uc ];
}
else
cStatus = MI_ERR;


return cStatus;
}


/*
* 函数名:PcdHalt
* 描述 :命令卡片进入休眠状态
* 输入 :无
* 返回 : 状态值
* = MI_OK,成功
* 调用 :外部调用
*/
char PcdHalt( void )
{
u8 ucComMF522Buf [ MAXRLEN ];
u32 ulLen;

ucComMF522Buf [ 0 ] = PICC_HALT;
ucComMF522Buf [ 1 ] = 0;

CalulateCRC ( ucComMF522Buf, 2, & ucComMF522Buf [ 2 ] );
PcdComMF522 ( PCD_TRANSCEIVE, ucComMF522Buf, 4, ucComMF522Buf, & ulLen );

return MI_OK;
}


void IC_CMT ( u8 * UID, u8 * KEY, u8 RW, u8 * Dat )
{
u8 ucArray_ID [ 4 ] = { 0 };//先后存放IC卡的类型和UID(IC卡序列号)

PcdRequest ( 0x52, ucArray_ID );//寻卡
PcdAnticoll ( ucArray_ID );//防冲撞
PcdSelect ( UID );//选定卡
PcdAuthState ( 0x60, 0x10, KEY, UID );//校验

if ( RW )//读写选择,1是读,0是写
PcdRead ( 0x10, Dat );
else
PcdWrite ( 0x10, Dat );

PcdHalt ();
}

/*********************************************END OF FILE*********************************************/

2,串口调式模块

(1)usart.h
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#ifndef __USART_H
#define __USART_H

#include "stm32f10x.h"
#include "stdio.h"

//Pin definition
/*******************************************************/
#define DEBUG_USART USART3
#define DEBUG_USART_CLK RCC_APB1Periph_USART3
#define DEBUG_USART_AF RCC_APB2Periph_AFIO
#define DEBUG_USART_GPIO_CLK RCC_APB2Periph_GPIOB
#define DEBUG_USART_BAUDRATE 115200

#define DEBUG_USART_RX_GPIO_PORT GPIOB
#define DEBUG_USART_RX_PIN GPIO_Pin_11

#define DEBUG_USART_TX_GPIO_PORT GPIOB
#define DEBUG_USART_TX_PIN GPIO_Pin_10


#define DEBUG_USART_IRQ USART3_IRQn
#define DEBUG_USART_IRQHandler USART3_IRQHandler

/************************************************************/

void USART_Config(void);
void Usart_SendByte( USART_TypeDef * pUSARTx, uint8_t ch);
void Usart_SendString( USART_TypeDef * pUSARTx, char *str);

void Usart_SendHalfWord( USART_TypeDef * pUSARTx, uint16_t ch);

#endif /* __USART_H */

(2)usart.c
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/**
******************************************************************************
* @file uasrt.c
* @author Soso
* @date 2019-12-18
* @brief Redirect c library printf function to usart port, interrupt receiving mode.
******************************************************************************
*/

#include "usart.h"


/* Configuring nested vectored interrupt controller NVIC */
static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

/* Nested vector interrupt controller group selection */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

/* Preemptio Priority is 1 */
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
/* Sub Priority is 1 */
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
/* Enable interrupt */
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

/* Configure USART as the interrupt source */
NVIC_InitStructure.NVIC_IRQChannel = DEBUG_USART_IRQ;
/* Initialize configuration NVIC */
NVIC_Init(&NVIC_InitStructure);
}

void USART_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

/* Enable port alternate function and enable USART GPIO clock */
RCC_APB2PeriphClockCmd(DEBUG_USART_AF|DEBUG_USART_GPIO_CLK,ENABLE);
/* Enable USART Clock */
RCC_APB1PeriphClockCmd(DEBUG_USART_CLK,ENABLE);

/* Configure the Tx pin for alternate function */
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Pin = DEBUG_USART_TX_PIN;
GPIO_Init(DEBUG_USART_TX_GPIO_PORT, &GPIO_InitStructure);

/* Configure the Rx pin for the alternate function */
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_InitStructure.GPIO_Pin = DEBUG_USART_RX_PIN;
GPIO_Init(DEBUG_USART_RX_GPIO_PORT, &GPIO_InitStructure);

/* Configuration USART mode */
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
/* USART mode control: simultaneous enable send and receive */
USART_InitStructure.USART_Mode = USART_Mode_Tx|USART_Mode_Rx;

USART_InitStructure.USART_BaudRate = DEBUG_USART_BAUDRATE;
USART_Init(DEBUG_USART, &USART_InitStructure);

/* Configure the serial port to receive interrupts. */
NVIC_Configuration();

/* Enable serial port receive interrupt */
USART_ITConfig(DEBUG_USART, USART_IT_RXNE, ENABLE);

/* Enable serial */
USART_Cmd(DEBUG_USART, ENABLE);
}


/***************** Send a character **********************/
void Usart_SendByte( USART_TypeDef * pUSARTx, uint8_t ch)
{
/* Send a byte of data to the USART */
USART_SendData(pUSARTx,ch);

/* Waiting for the transmit data register to be empty */
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
}

/***************** Send string **********************/
void Usart_SendString( USART_TypeDef * pUSARTx, char *str)
{
unsigned int k=0;
do
{
Usart_SendByte( pUSARTx, *(str + k) );
k++;
} while(*(str + k)!='\0');

/* Waiting for transmission to complete */
while(USART_GetFlagStatus(pUSARTx,USART_FLAG_TC)==RESET)
{}
}

/***************** Send a 16-digit number **********************/
void Usart_SendHalfWord( USART_TypeDef * pUSARTx, uint16_t ch)
{
uint8_t temp_h, temp_l;

/* Take out the high eight */
temp_h = (ch&0XFF00)>>8;
/* Take the lower eight */
temp_l = ch&0XFF;

/* Send high eight */
USART_SendData(pUSARTx,temp_h);
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);

/* Send the lower eight digits */
USART_SendData(pUSARTx,temp_l);
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
}

/* Redirect the c library function printf to the serial port,
use the printf function after redirection. */
int fputc(int ch, FILE *f)
{
/* Send a byte of data to the serial port */
USART_SendData(DEBUG_USART, (uint8_t) ch);

/* Waiting to send */
while (USART_GetFlagStatus(DEBUG_USART, USART_FLAG_TXE) == RESET);

return (ch);
}

/* Redirect the c library function scanf to the serial port,
rewrite backwards can use scanf, getchar and other functions. */
int fgetc(FILE *f)
{
/* Waiting for serial input data */
while (USART_GetFlagStatus(DEBUG_USART, USART_FLAG_RXNE) == RESET);

return (int)USART_ReceiveData(DEBUG_USART);
}
/*********************************************END OF FILE*********************************************/

3,延时函数配置模块

(1)systick.h
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#ifndef __SYSTICK_H
#define __SYSTICK_H

#include"stm32f10x.h"

void delay_us(u32 i);
void delay_ms(u32 i);


#endif /* __SYSTICK_DELAY_H */

(2)systick.c
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#include "systick.h"

void delay_us(u32 i)
{
u32 temp;
SysTick->LOAD=9*i; //Set the reload value, at 72MHZ
SysTick->CTRL=0X01; //Enable, reduce to zero is no action, use external clock source
SysTick->VAL=0; //Clear counter
do
{
temp=SysTick->CTRL; //Read current countdown value
}
while((temp&0x01)&&(!(temp&(1<<16)))); //Waiting time to arrive
SysTick->CTRL=0; //Close counter
SysTick->VAL=0; //Empty counter
}
void delay_ms(u32 i)
{
u32 temp;
SysTick->LOAD=9000*i; //Set the reload value, at 72MHZ
SysTick->CTRL=0X01; //Enable, reduce to zero is no action, use external clock source
SysTick->VAL=0; //Clear counter
do
{
temp=SysTick->CTRL; //Read current countdown value
}
while((temp&0x01)&&(!(temp&(1<<16)))); //Waiting time to arrive
SysTick->CTRL=0; //Close counter
SysTick->VAL=0; //Empty counter
}

4,主函数main.c

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/**
******************************************************************************
* @file main.c
* @author Soso
* @date 2019-12-21
* @brief STM32F103 read identification RFID IC card induction module.
*
******************************************************************************
*/

#include "stm32f10x.h"
#include "systick.h"
#include "usart.h"
#include "rc522.h"

// 这两个数组根据个人使用的IC卡情况而定
uint16_t Keychain[4] = {0x77,0x56,0x7d,0x60},S50Card[4] = {0x97,0xb7,0xce,0x3a};

void IC_test ( void )
{
u8 ucArray_ID[4]; //先后存放IC卡的类型和UID(IC卡序列号)
u8 ucStatusReturn,flag = 0; //返回状态

while(1)
{
if((ucStatusReturn = PcdRequest(PICC_REQALL, ucArray_ID)) != MI_OK) //寻卡
ucStatusReturn = PcdRequest(PICC_REQALL, ucArray_ID); //若失败再次寻卡

if(ucStatusReturn == MI_OK)
{
if(PcdAnticoll (ucArray_ID) == MI_OK) //防冲撞(当有多张卡进入读写器操作范围时,防冲突机制会从其中选择一张进行操作)
{
printf("The Card ID is: %x %x %x %x\r\n", ucArray_ID[0], ucArray_ID[1], ucArray_ID[2],ucArray_ID[3]);
for(uint16_t i=0;i<4;i++)
{
if(ucArray_ID[i] == Keychain[i])
flag = 1;
else if(ucArray_ID[i] == S50Card[i])
flag = 2;
}
if(flag == 1)
printf("This is keychain\r\n");
else if(flag == 2)
printf("This is S50Card\r\n");
}
}
}
}


int main(void)
{
USART_Config();
RC522_Init();

printf("initialized successfully.\r\n");

while(1)
{
IC_test();//IC卡检测
}
}




/*********************************************END OF FILE*********************************************/

三、硬件接线说明

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【 !】 引脚分配

STM32 RC522
PA4 <---> SDA
PA5 <---> SCK
PA7 <---> MOSI
PA6 <---> MISO
GND <---> GND
PA0 <---> RST
+3.3V <---> +3.3V

STM32 串口模块
PB11(Rx) <---> Tx
PB10(Tx) <---> Rx
+3.3V <---> +3.3V
GND <---> GND
波特率:115200

四、最终效果

QvlPYR.png

五、参考资料

野火【RC522】STM32F103驱动RC522代码


STM32F103学习笔记——RC522射频卡
https://kevinloongc.github.io/posts/3dca690f.html
作者
Kevin Loongc
发布于
2019年12月21日
许可协议