rc522优点_51单片机rc522接线图

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发布于 2022-11-04 20:09:22

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发布于 2022-11-04 20:09:22

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公司需要做刷卡模块，因此选了RC522做demo程序。下面就RC522知识做简要的总结。本人使用stm32的硬件spi接口搭建工程，相关的配置如下： spi配置：引脚配置 SDA ——-PA4 SCLK —-PB13 MOSI ——-PB15 MISO ——PB14 IRQ —没接 RST —- PB0

//PB12--NSS PB13--SCK  PB14--MISO  PB15--MOSI
void SPI2_Init(void)
{	 
	RCC->APB2ENR |= 1 << 3;   //开启PORT b端口时钟      
	RCC->APB1ENR |= 1 << 14;  //开启SPI2时钟   
	//	PB13，PB14 PB15复用输出   
	GPIOB->CRH &= 0X000FFFFF; 
	GPIOB->CRH |= 0XBBB00000;    
	GPIOB->ODR |= 7 << 13;    
		
	SPI2->CR1 |= 0<<10;   //全双工模式
	SPI2->CR1 |= 1<<9;    //启用软件管理
	SPI2->CR1 |= 1<<8;      //ssi = 1

	SPI2->CR1 |= 1<<2;     // 主设备
	SPI2->CR1 |= 0<<11;    //8 bit
	SPI2->CR1 |= 1<<1;     //SCK空闲为高
	SPI2->CR1 |= 1<<0;     //上升沿采样
	SPI2->CR1 |= 7<<3;     //256分频
	SPI2->CR1 |= 0<<7;     //先发MSB
	SPI2->CR1 |= 1<<6;    //开启SPI	
	SPI2->CR2 |= 1 << 2;
	//SPI2_ReadWriteByte(0xff);	 
}   

void SPI2_SetSpeed(u8 SpeedSet)
{
	SPI2->CR1 &= 0XFFC7;
	if(SpeedSet==SPI_SPEED_2)
	{
		SPI2->CR1|=0<<3;
	}
	else if(SpeedSet==SPI_SPEED_8) 
	{
		SPI2->CR1|=2<<3;
	}
	else if(SpeedSet==SPI_SPEED_16)
	{
		SPI2->CR1|=3<<3;
	}
	else			 	 
	{
		SPI2->CR1|=7<<3; 
	}
	SPI2->CR1|=1<<6; 	  
} 

u8 SPI2_ReadWriteByte(u8 TxData)
{		
	u8 retry=0;				 
	while((SPI2->SR&1<<1)==0)
	{
		retry++;
		if(retry>200)return 0;
	}			  
	SPI2->DR=TxData;	 	 
	retry=0;
	while((SPI2->SR&1<<0)==0)  
	{
		retry++;
		if(retry>200)return 0;
	}	  						    
	return SPI2->DR;          			    
}

RC522相关接口初始化：由于spi的cs由软件控制，所以，这里设置PA4为CS，PB0为rst

void RCC52_init(void)
{
	RCC->APB2ENR |= 1 << 3;       	    
	RCC->APB2ENR |= 1 << 2;
	GPIOB->CRL &= 0XFFFFFFF0; 
	GPIOB->CRL |= 0X00000003;   
	GPIOB->ODR |= 1 << 0;   
	
	GPIOA->CRL &= 0XFFF0FFFF; 
	GPIOA->CRL |= 0X00030000;   
	GPIOA->ODR |= 1 << 4; 
}

rc522的识别过程:

寻卡———->防冲突———->寻卡———>验证密码———>存储操作卡的操作包括：读 (Read)：读一个块；写 (Write）：写一个块；加（Increment）：对数值块进行加值；减（Decrement）：对数值块进行减值；存储（Restore）：将块中的内容存到数据寄存器中；传输（Transfer）：将数据寄存器中的内容写入块中；中止（Halt）：将卡置于暂停工作状态；

存储器组织

下面是识别卡过程的主函数

#include "sys.h"
#include "usart.h"		
#include "delay.h"	
#include "led.h" 
#include "key.h"
#include "exti.h"
#include "wdg.h"
#include "timer.h"
#include "lcd.h"	   
#include "rtc.h"
#include "wkup.h"
#include "adc.h"
#include "dma.h"
#include "24cxx.h"
#include "flash.h" 		 
#include "RC522.h"
#include "spi2.h"
#include <string.h>
unsigned char DefaultKey[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
unsigned char data[16] = {0};
//4字节金额（低字节在前）＋4字节金额取反＋4字节金额＋1字节块地址＋1字节块地址取反＋1字节块地址＋1字节块地址取反
unsigned char bull[16] = {0x01,0x00,0x00,0x00,0xFE,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x01,0x02,0xFD,0x02,0xFD};
unsigned char value[4] = {0X00,0x00,0x00,0x0A};
int main(void)
{		
unsigned char ucArray_ID [ 4 ];   /*先后存放IC卡的类型和UID(IC卡序列号)*/ 
unsigned char ucStatusReturn = MI_ERR;     /*返回状态 */ 	
char cStr [ 30 ];	   
int i = 0;
unsigned char addr = 2;
Stm32_Clock_Init(9);//系统时钟设置
delay_init(72);		//延时初始化
uart_init(72,9600); //串口1初始化   
LED_Init();	   		//LED初始化
RCC52_init ();
//PB12--NSS PB13--SCK  PB14--MISO  PB15--MOSI
SPI2_Init()	 ;
//	SPIx_SetSpeed(256);
if( MI_OK == PcdReset())
{
printf("RESET OK\n");
}
else
{
printf("reset failed\n");
while(1);
}
PcdConfigISOType();
PcdAntennaOff();
delay_ms(10);
PcdAntennaOn();
while(1)
{
ucStatusReturn = PcdRequest(PICC_REQALL,ucArray_ID );
if(MI_OK !=  ucStatusReturn)
{	//	 printf("yanzheng fial\n");
PcdAntennaOff();
delay_ms(10);
PcdAntennaOn();
continue;	
}
if(ucStatusReturn == 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）*/
if ( PcdAnticoll ( ucArray_ID ) == MI_OK )                                                                   
{
sprintf ( cStr, "The Card ID is: %02X%02X%02X%02X",
ucArray_ID [ 0 ],
ucArray_ID [ 1 ],
ucArray_ID [ 2 ],
ucArray_ID [ 3 ] );
printf ( "%s\r\n",cStr ); 			
}		
}
ucStatusReturn = PcdSelect(ucArray_ID);
if(ucStatusReturn != MI_OK)
continue;
#if 0		 
ucStatusReturn = PcdAuthState(PICC_AUTHENT1A, 1, DefaultKey, ucArray_ID);//验证卡片密码
if(ucStatusReturn != MI_OK)
continue;
ucStatusReturn = PcdRead(1,data);
if(ucStatusReturn == MI_OK)
{
for(i = 0; i < 16; i++)
{
printf("0x%x ",data[i]);
}
}
printf("\n");
ucStatusReturn = PcdAuthState(PICC_AUTHENT1A, 1, DefaultKey, ucArray_ID);//验证卡片密码
if(ucStatusReturn != MI_OK)
continue;
data[14] = 0x11;
data[15] = 0x13;
ucStatusReturn = PcdWrite(1,data);
if(ucStatusReturn == MI_OK)
{
for(i = 0; i < 16; i++)
{
printf("0x%x ",data[i]);
}
}
printf("\n");
#else
//初始化钱包
ucStatusReturn = PcdAuthState(PICC_AUTHENT1A, 2, DefaultKey, ucArray_ID);//验证卡片密码
if(ucStatusReturn != MI_OK)
continue;
ucStatusReturn = PcdWrite(2,bull);
if(ucStatusReturn != MI_OK)
continue;
//查询钱包
ucStatusReturn = PcdAuthState(PICC_AUTHENT1A, 2, DefaultKey, ucArray_ID);//验证卡片密码
if(ucStatusReturn != MI_OK)
continue;
ucStatusReturn = PcdRead(2,bull);
if(ucStatusReturn == MI_OK)
{
for(i = 0; i < 16; i++)
{
printf("0x%x ",bull[i]);
}
}
printf("\n");
//扣值
ucStatusReturn = PcdAuthState(PICC_AUTHENT1A, addr, DefaultKey, ucArray_ID);//验证卡片密码
if(ucStatusReturn != MI_OK)
continue;
ucStatusReturn =  PcdValue(PICC_INCREMENT,addr,value)	   ;
if(ucStatusReturn != MI_OK)
{printf("decre fial\n");
continue;
}
ucStatusReturn = PcdAuthState(PICC_AUTHENT1A, 2, DefaultKey, ucArray_ID);//验证卡片密码
if(ucStatusReturn != MI_OK)
continue;
//显示余额
ucStatusReturn = PcdRead(2,bull);
if(ucStatusReturn == MI_OK)
{
for(i = 0; i < 16; i++)
{
printf("0x%x ",bull[i]);
}
}
printf("\n");
#endif
delay_ms(1000);
}
}

大概过程就是这样。其中，充值，减值的电子钱包功能测试没有通过，没时间研究了，毕竟跟工作关系不大。相关代码已经上传了。参考： https://blog.csdn.net/liujianhua1989/article/details/72639307 https://blog.csdn.net/a827415225/article/details/51898897 https://blog.csdn.net/txf1984/article/details/46560261

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原始发表：2022年9月19日，如有侵权请联系 cloudcommunity@tencent.com 删除

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