本文介绍了RC522 RFID模块在STM32平台上的驱动实现及读写操作流程，包括引脚配置、寻卡、防冲突、密码验证等关键步骤，并提供了完整的代码示例。
目录
1、前言
编译工具：RT thread studio 2.1.0
控制芯片：STM32F103RCT6
IC卡：RC522
RT thread studio上的软件包貌似有问题，导入之后没办法使用，因此在网上参考了一些例程，在此总结一下该模块的调试过程，参考博客：https://blog.youkuaiyun.com/junzia/article/details/102224285
a、该卡分为16个扇区，每个扇区有4块（块0、块1、块2、块3）组成；
b、将所有的块按绝对位置编号为0~63，其中编号0的块（即第0扇区的第0块）只能进行读操作，它用于存放厂商代码，已经固化；
c、每个扇区的块0、块1、块2可以存放数据，块3是控制块用于存储当前块的密码A、密码B、控制位
2、RC522驱动代码
该代码直接将.c和.h文件拷贝到工程就可以使用（仅限于RT Thread studio编译软件），在.h文件中可以改变RC522的接入引脚，并且在第3小节会说一下.c文件中RC522的读写步骤。
RC522.C
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-05-10 35166 the first version
*/
#include <rtthread.h>
#include "board.h"
#include <rtdevice.h>
#include "RC522.h"
#include <drv_common.h>
#define DBG_TAG "RC522"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>
/**********线程优先级*********/
#define RC522_THREAD_PRIORITY 15
// M1卡分为16个扇区，每个扇区由四个块（块0、块1、块2、块3）组成
// 将16个扇区的64个块按绝对地址编号为：0~63
// 第0个扇区的块0（即绝对地址0块），用于存放厂商代码，已经固化不可更改
// 每个扇区的块0、块1、块2为数据块，可用于存放数据
// 每个扇区的块3为控制块（绝对地址为:块3、块7、块11.....）包括密码A，存取控制、密码B等
/*******************************
*连线说明：
*1--SDA <----->PA4
*2--SCK <----->PA5
*3--MOSI <----->PA7
*4--MISO <----->PA6
*5--悬空
*6--GND <----->GND
*7--RST <----->PC4
*8--VCC <----->VCC
************************************/
#define MAXRLEN 18
/*
* 函数名：PcdInit
* 描述 ：引脚初始化
* 返回 : 状态值
* = MI_OK，成功
*/
void PcdInit()
{
rt_pin_mode(MF522_RST_PIN, PIN_MODE_OUTPUT);
rt_pin_mode(MF522_MISO_PIN, PIN_MODE_INPUT);
rt_pin_mode(MF522_MOSI_PIN, PIN_MODE_OUTPUT);
rt_pin_mode(MF522_SCK_PIN, PIN_MODE_OUTPUT);
rt_pin_mode(MF522_NSS_PIN, PIN_MODE_OUTPUT);
}
/*
* 函数名：PcdRequest
* 描述 ：寻卡
* 输入 ：req_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
* = MI_OK，成功
* 调用 ：外部调用
*/
char PcdRequest(unsigned char req_code,unsigned char *pTagType)
{
char status;
unsigned int unLen;
unsigned char 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;
}
/*
* 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(unsigned char *pSnr)
{
char status;
unsigned char i,snr_check=0;
unsigned int unLen;
unsigned char 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;
}
/*
* 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(unsigned char *pSnr)
{
char status;
unsigned char i;
unsigned int unLen;
unsigned char ucComMF522Buf[MAXRLEN];
ucComMF522Buf[0] = PICC_ANTICOLL1;
ucComMF522Buf[1] = 0x70;
ucComMF522Buf[6] = 0;
for (i=0; i<4; i++)
{
ucComMF522Buf[i+2] = *(pSnr+i);
ucComMF522Buf[6] ^= *(pSnr+i);
}
CalulateCRC(ucComMF522Buf,7,&ucComMF522Buf[7]);
ClearBitMask(Status2Reg,0x08);
status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,9,ucComMF522Buf,&unLen);
if ((status == MI_OK) && (unLen == 0x18))
{ status = MI_OK; }
else
{ status = MI_ERR; }
return status;
}
/*
* 函数名：PcdAuthState
* 描述 ：验证卡片密码
* 输入 ：auth_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(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr)
{
char status;
unsigned int unLen;
unsigned char i,ucComMF522Buf[MAXRLEN];
ucComMF522Buf[0] = auth_mode;
ucComMF522Buf[1] = addr;
for (i=0; i<6; i++)
{ ucComMF522Buf[i+2] = *(pKey+i); }
for (i=0; i<6; i++)
{ ucComMF522Buf[i+8] = *(pSnr+i); }
status = PcdComMF522(PCD_AUTHENT,ucComMF522Buf,12,ucComMF522Buf,&unLen);
if ((status != MI_OK) || (!(ReadRawRC(Status2Reg) & 0x08)))
{ status = MI_ERR; }
return status;
}
/*
* 函数名：PcdRead
* 描述 ：读取M1卡一块数据
* 输入 ：u8 addr，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(unsigned char addr,unsigned char *pData)
{
char status;
unsigned int unLen;
unsigned char i,ucComMF522Buf[MAXRLEN];
ucComMF522Buf[0] = PICC_READ;
ucComMF522Buf[1] = addr;
CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);
status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);
if ((status == MI_OK) && (unLen == 0x90))
{
for (i=0; i<16; i++)
{ *(pData+i) = ucComMF522Buf[i]; }
}
else
{ status = MI_ERR; }
return status;
}
/*
* 函数名：PcdWrite
* 描述 ：写数据到M1卡一块
* 输入 ：u8 addr，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(unsigned char addr,unsigned char *pData)
{
char status;
unsigned int unLen;
unsigned char i,ucComMF522Buf[MAXRLEN];
ucComMF522Buf[0] = PICC_WRITE;
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)
{
for (i=0; i<16; i++)
{ ucComMF522Buf[i] = *(pData+i); }
CalulateCRC(ucComMF522Buf,16,&ucComMF522Buf[16]);
status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,18,ucComMF522Buf,&unLen);
if ((status != MI_OK) || (unLen != 4) || ((ucComMF522Buf[0] & 0x0F) != 0x0A))
{ status = MI_ERR; }
}
return status;
}
/*
* 函数名：PcdSpicelWrite
* 描述 ：写数据到M1卡一块
* 输入 ：u8 addr，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 PcdSpicelWrite(unsigned char addr, unsigned char *pData)
{
unsigned int unLen;
unsigned char ucComMF522Buf[MAXRLEN];
//需要使用以下步骤开启后门
PcdHalt();
WriteRawRC(BitFramingReg, 0x07);
ucComMF522Buf[0] = 0x40;
PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);
WriteRawRC(BitFramingReg, 0x00);
ucComMF522Buf[0] = 0x43;
PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);
return PcdWrite(addr, pData);
}
/*
* 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)
{
unsigned int unLen;
unsigned char ucComMF522Buf[MAXRLEN];
ucComMF522Buf[0] = PICC_HALT;
ucComMF522Buf[1] = 0;
CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);
PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);
return MI_OK;
}
/*
* 函数名：CalulateCRC
* 描述 ：用RC522计算CRC16
* 输入 ： pIndata，计算CRC16的数组
* len，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(unsigned char *pIndata,unsigned char len,unsigned char *pOutData)
{
unsigned char i,n;
ClearBitMask(DivIrqReg,0x04);
WriteRawRC(CommandReg,PCD_IDLE);
SetBitMask(FIFOLevelReg,0x80);
for (i=0; i<len; i++)
{ WriteRawRC(FIFODataReg, *(pIndata+i)); }
WriteRawRC(CommandReg, PCD_CALCCRC);
i = 0xFF;
do
{
n = ReadRawRC(DivIrqReg);
i--;
}
while ((i!=0) && !(n&0x04));
pOutData[0] = ReadRawRC(CRCResultRegL);
pOutData[1] = ReadRawRC(CRCResultRegM);
}
/*
* 函数名：PcdRese
* 描述 ：复位RC522
* 输入 ：无
* 返回 : 无
* 调用 ：外部调用
*/
char PcdReset(void)
{
RST_H;
rt_thread_mdelay(10);
RST_L;
rt_thread_mdelay(10);
RST_H;
rt_thread_mdelay(100);
if(ReadRawRC(0x02) == 0x80)
{
}
WriteRawRC(CommandReg,PCD_RESETPHASE);
WriteRawRC(ModeReg,0x3D);
WriteRawRC(TReloadRegL,30);
WriteRawRC(TReloadRegH,0);
WriteRawRC(TModeReg,0x8D);
WriteRawRC(TPrescalerReg,0x3E);
WriteRawRC(TxAutoReg,0x40);
return MI_OK;
}
/*
* 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
*/
char M500PcdConfigISOType(unsigned char type)
{
if (type == 'A')
{
ClearBitMask(Status2Reg,0x08);
WriteRawRC(ModeReg,0x3D);//3F
WriteRawRC(RxSelReg,0x86);//84
WriteRawRC(RFCfgReg,0x7F); //4F
WriteRawRC(TReloadRegL,30);//tmoLength);// TReloadVal = 'h6a =tmoLength(dec)
WriteRawRC(TReloadRegH,0);
WriteRawRC(TModeReg,0x8D);
WriteRawRC(TPrescalerReg,0x3E);
rt_thread_mdelay(10);
PcdAntennaOn();
}
else{ return (char)-1; }
return MI_OK;
}
/*
* 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
*/
unsigned char ReadRawRC(unsigned char Address)
{
unsigned char i, ucAddr;
unsigned char ucResult=0;
NSS_L;
ucAddr = ((Address<<1)&0x7E)|0x80;
for(i=8;i>0;i--)
{
SCK_L;
if(ucAddr&0x80)
MOSI_H;
else
MOSI_L;
SCK_H;
ucAddr <<= 1;
}
for(i=8;i>0;i--)
{
SCK_L;
ucResult <<= 1;
SCK_H;
if(READ_MISO == 1)
ucResult |= 1;
}
NSS_H;
SCK_H;
return ucResult;
}
/*
* 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(unsigned char Address, unsigned char value)
{
unsigned char i, ucAddr;
SCK_L;
NSS_L;
ucAddr = ((Address<<1)&0x7E);
for(i=8;i>0;i--)
{
if(ucAddr&0x80)
MOSI_H;
else
MOSI_L;
SCK_H;
ucAddr <<= 1;
SCK_L;
}
for(i=8;i>0;i--)
{
if(value&0x80)
MOSI_H;
else
MOSI_L;
SCK_H;
value <<= 1;
SCK_L;
}
NSS_H;
SCK_H;
}
/*
* 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(unsigned char reg,unsigned char mask)
{
char tmp = 0x0;
tmp = ReadRawRC(reg);
WriteRawRC(reg,tmp | mask); // 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(unsigned char reg,unsigned char mask)
{
char tmp = 0x0;
tmp = ReadRawRC(reg);
WriteRawRC(reg, tmp & ~mask); // clear bit mask
}
/*
* 函数名：PcdComMF522
* 描述 ：通过RC522和ISO14443卡通讯
* 输入 ：Command，RC522命令字
* pInData，通过RC522发送到卡片的数据
* InLenByte，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(unsigned char Command,
unsigned char *pInData,
unsigned char InLenByte,
unsigned char *pOutData,
unsigned int *pOutLenBit)
{
char status = MI_ERR;
unsigned char irqEn = 0x00;
unsigned char waitFor = 0x00;
unsigned char lastBits;
unsigned char n;
unsigned int i;
switch (Command)
{
case PCD_AUTHENT:
irqEn = 0x12;
waitFor = 0x10;
break;
case PCD_TRANSCEIVE:
case PCD_SPECIAL_COPY:
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 = 2000;
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;
}
/*
* 函数名：PcdAntennaOn
* 描述 ：开启天线
* 输入 ：无
* 返回 : 无
* 调用 ：内部调用
*/
void PcdAntennaOn()
{
unsigned char i;
i = ReadRawRC(TxControlReg);
if (!(i & 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()
{
ClearBitMask(TxControlReg, 0x03);
}
void WaitCardOff(void)
{
char status;
unsigned char TagType[2];
while(1)
{
status = PcdRequest(REQ_ALL, TagType);
if(status)
{
status = PcdRequest(REQ_ALL, TagType);
if(status)
{
status = PcdRequest(REQ_ALL, TagType);
if(status)
{
return;
}
}
}
rt_thread_mdelay(100);
}
}
static void RC522_thread_entry(void *parameter)
{
char status;
unsigned char buf[16]; //数据缓存
unsigned char TagType[2]; //卡片类型
unsigned char SelectedSnr[4]; //卡片序列号
// unsigned char DefaultKey1[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; //卡默认密码
unsigned char DefaultKey2[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; //卡默认密码
unsigned char inDoor[16] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10}; //写入的数据
PcdInit();
PcdReset();
PcdAntennaOff();
PcdAntennaOn();
M500PcdConfigISOType( 'A' );
rt_kprintf( "rc522 init over!\n" );
while(1)
{
status= PcdRequest( REQ_ALL , TagType ); //寻卡
if(status == MI_OK)
{
status = PcdAnticoll(SelectedSnr); //防冲撞
if(status == MI_OK)
{
status = PcdSelect(SelectedSnr); //选定卡片
if(status == MI_OK)
{
for(int i = 0;i < 4 ;i++) //读写16个扇区
{
status = PcdAuthState(KEYA, (i*4+3), DefaultKey2, SelectedSnr); //验证卡片当前扇区的密码
status = PcdAuthState(KEYB, (i*4+3), DefaultKey2, SelectedSnr); //验证卡片当前扇区的密码
// if(i == 0)
// {
// status = PcdWrite(1, inDoor); //第一扇区第1块写值(该扇区第0块不能写) (需要先验证)
// rt_kprintf( "sta5:%d!\n",status );
// }
if(status == MI_OK)
{
for(int j = 0; j < 4; j++)
{
status = PcdRead((i*4+j), buf); //读取当前扇区每个块的值
if(status == MI_OK)
{
for(int k = 0; k < 16; k++) //打印当前块的值
{
rt_kprintf("%x ", (uint16_t)buf[k]);
}
rt_kprintf("\n");
}
}
}
}
}
rt_kprintf("operate finished! %x \n", status);
WaitCardOff();
}
}
}
rt_thread_mdelay(50);
}
}
static int RC522_Priority_temp(void)
{
rt_thread_t RC522_thread;
RC522_thread = rt_thread_create("RC522_thread",
RC522_thread_entry,
"RC522_thread",
1024,
RC522_THREAD_PRIORITY,
20);
if (RC522_thread != RT_NULL)
{
rt_thread_startup(RC522_thread);
}
return RT_EOK;
}
INIT_APP_EXPORT(RC522_Priority_temp);
RC522.h
#ifndef __RC522_H
#define __RC522_H
#define MF522_RST_PIN GET_PIN(C, 4)
#define MF522_MISO_PIN GET_PIN(A, 6)
#define MF522_MOSI_PIN GET_PIN(A, 7)
#define MF522_SCK_PIN GET_PIN(A, 5)
#define MF522_NSS_PIN GET_PIN(A, 4)
#define RST_H rt_pin_write(MF522_RST_PIN, PIN_HIGH)
#define RST_L rt_pin_write(MF522_RST_PIN, PIN_LOW)
#define MOSI_H rt_pin_write(MF522_MOSI_PIN, PIN_HIGH)
#define MOSI_L rt_pin_write(MF522_MOSI_PIN, PIN_LOW)
#define SCK_H rt_pin_write(MF522_SCK_PIN, PIN_HIGH)
#define SCK_L rt_pin_write(MF522_SCK_PIN, PIN_LOW)
#define NSS_H rt_pin_write(MF522_NSS_PIN, PIN_HIGH)
#define NSS_L rt_pin_write(MF522_NSS_PIN, PIN_LOW)
#define READ_MISO rt_pin_read(MF522_MISO_PIN)
// 函数
void PcdInit(void);
char PcdReset(void);
void PcdAntennaOn(void);
void PcdAntennaOff(void);
char PcdRequest(unsigned char req_code,unsigned char *pTagType);
char PcdAnticoll(unsigned char *pSnr);
char PcdSelect(unsigned char *pSnr);
char PcdAuthState(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr);
char PcdRead(unsigned char addr,unsigned char *pData);
char PcdWrite(unsigned char addr,unsigned char *pData);
char PcdValue(unsigned char dd_mode,unsigned char addr,unsigned char *pValue);
char PcdBakValue(unsigned char sourceaddr, unsigned char goaladdr);
char PcdHalt(void);
char PcdComMF522(unsigned char Command,
unsigned char *pInData,
unsigned char InLenByte,
unsigned char *pOutData,
unsigned int *pOutLenBit);
void CalulateCRC(unsigned char *pIndata,unsigned char len,unsigned char *pOutData);
void WriteRawRC(unsigned char Address,unsigned char value);
unsigned char ReadRawRC(unsigned char Address);
void SetBitMask(unsigned char reg,unsigned char mask);
void ClearBitMask(unsigned char reg,unsigned char mask);
char M500PcdConfigISOType(unsigned char type);
void delay_10ms(unsigned int _10ms);
void WaitCardOff(void);
char PcdSpicelWrite(uint8_t addr, unsigned char *pData);
//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
#define PCD_SPECIAL_COPY 0x43
#define DEF_FIFO_LENGTH 64
// 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
#define REQ_ALL 0x52
#define KEYA 0x60
#define KEYB 0x61
#define MI_OK (char)0
#define MI_NOTAGERR (char)(-1)
#define MI_ERR (char)(-2)
#endif
3、读写操作
代码已经在第2小节的RC522.c文件中，这里就不贴了。这里是说一下数据块（块0、块1、块2）的读写操作，该操作与控制位（块3）中的字节6、7、8、9有关，详细的功能可以看下面两个图：
流程图：
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