，大二上学期做的，过了很久，先上一下图：

这并不是做个最后一版；主体是RC552+STM32+1062；蜂鸣器，继电器，LED等；反正最后的效果就是，刷一下卡，1602显示一下持卡人（需要提前注册，注册方法也就是在数组里多添加几个编号，哈哈，毕竟没有数据库暂时也只能想到这样了）；然后蜂鸣器响，灯亮，继电器开；

贴一下关键代码：

#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "led.h"
#include "lcd1602.h"
#include "key.h"
#include <stdio.h>
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "main.h"
#include "mfrc522.h"
#include "stm32f10x.h"
#include "exti.h"

 USART_InitTypeDef USART_InitStructure;

void GPIO_ini()
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  
  /* Enable the GPIO Clock */
  RCC_APB2PeriphClockCmd(MF522_RST_CLK, ENABLE);

  /* Configure the GPIO pin */
  GPIO_InitStructure.GPIO_Pin = MF522_RST_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_Init(MF522_RST_PORT, &GPIO_InitStructure);
    
  /* Enable the GPIO Clock */
  RCC_APB2PeriphClockCmd(MF522_MISO_CLK, ENABLE);

  /* Configure the GPIO pin */
  GPIO_InitStructure.GPIO_Pin = MF522_MISO_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_Init(MF522_MISO_PORT, &GPIO_InitStructure);
    
  /* Enable the GPIO Clock */
  RCC_APB2PeriphClockCmd(MF522_MOSI_CLK, ENABLE);

  /* Configure the GPIO pin */
  GPIO_InitStructure.GPIO_Pin = MF522_MOSI_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_Init(MF522_MOSI_PORT, &GPIO_InitStructure);
    
  /* Enable the GPIO Clock */
  RCC_APB2PeriphClockCmd(MF522_SCK_CLK, ENABLE);

  /* Configure the GPIO pin */
  GPIO_InitStructure.GPIO_Pin = MF522_SCK_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_Init(MF522_SCK_PORT, &GPIO_InitStructure);
    
  /* Enable the GPIO Clock */
  RCC_APB2PeriphClockCmd(MF522_NSS_CLK, ENABLE);

  /* Configure the GPIO pin */
  GPIO_InitStructure.GPIO_Pin = MF522_NSS_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_Init(MF522_NSS_PORT, &GPIO_InitStructure);
    
  /* Enable the GPIO Clock */
  RCC_APB2PeriphClockCmd(LED_CLK, ENABLE);

  /* Configure the GPIO pin */
  GPIO_InitStructure.GPIO_Pin = LED_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_Init(LED_PORT, &GPIO_InitStructure);
}

void InitializeSystem()
{
    //LED_OFF;
    delay_10ms(10);
    PcdReset();
    PcdAntennaOff(); 
    PcdAntennaOn();  
    M500PcdConfigISOType( 'A' );
    //LED_ON;
    delay_10ms(10);    
    //LED_OFF;
    delay_10ms(10);
    //LED_ON;
    delay_10ms(10);    
    //LED_OFF;
}
int main(void)
{  
    
    char status;
    unsigned char snr, buf[16], TagType[2], SelectedSnr[4], DefaultKey[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 
    u8 t;
    u8 str[] = "Jiaomengke";
    u8 str2[] = "Jiaomengke2";
    u8 str3[] = "Jiaomengke";

    delay_init();
    NVIC_Configuration();
    uart_init(9600);
    GPIO_Configuration();
    KEY_Init();
    LED_Init();
    flog:
    LCD1602_Init();
    //LCD1602_Show_Str(0, 0, "Please put card");
    LCD1602_Show_Str(1, 0, "    Please");
    LCD1602_Show_Str(2, 1, "  put card");
    GPIO_ini();  
    InitializeSystem( );

    while(1)
    {        status= PcdRequest(REQ_ALL,TagType);
        if(!status)
        {
            status = PcdAnticoll(SelectedSnr);
            if(!status)
            {
                status=PcdSelect(SelectedSnr);
                if(!status)
                {
                    snr = 0;
      　　　　　　    status = PcdAuthState(KEYA, (snr*4+3), DefaultKey, SelectedSnr);// УÑé0ÉÈÇøÃÜÂë
                    {
                        if(!status)
                        {
                            status = PcdRead((snr*4+1), buf);  //PcdWrite((snr*4+1), buf);    // ¶ÁÈ¡0ÉÈÇø1¿éÊý¾Ý
                            if(!status && (SelectedSnr[2]==0x3e||SelectedSnr[2]==0xf6||SelectedSnr[2]==0xf4||SelectedSnr[2]==0xe7))
                            {
                                LED_ON;        
                                WaitCardOff();
                                while(1)
                                {　　LCD1602_ClearScreen();
                                    LCD1602_Show_Str(1, 0, " Welcome You");
                                    if(SelectedSnr[2]==0x3e)
                                 　　 LCD1602_Show_Str(2, 1, str);
                                    if(SelectedSnr[2]==0xf6)
                                　　  LCD1602_Show_Str(2, 1, str1);
                                    if(SelectedSnr[2]==0xf4)
                                 　　 LCD1602_Show_Str(2, 1, str2);
                                    if(SelectedSnr[2]==0xe7)
                                 　　 LCD1602_Show_Str(2, 1, str3);
                                　　 delay_ms(1000);    
                               　　  LED_OFF;
                                    delay_ms(1000);
                                goto flog;
                                }
                            }
                        }
                    }
                }
            }
        }    
        LED_OFF;
    }
}