STC89C52RC单片机，读RFID卡片，如何只向串口发送一次数据

ID:210728 · 发表于 2018-11-2 17:16

在用RFID读卡的时候，向串口发送卡片信息，但是每次在串口上看到的都是循环读卡片的信息，我只想让下位机通过串口只发送一次卡片信息；求各位大神代码怎么写；
主函数代码如下：
void main( )
{
   unsigned char status,i;
   unsigned int temp;
   lcd_init();
   InitializeSystem( );
   PcdReset();
   PcdAntennaOff();
   PcdAntennaOn();
   display_welcome2();



   while ( 1 )
   {
      status = PcdRequest(PICC_REQALL, g_ucTempbuf);//寻卡
      if (status != MI_OK)
      {
   continue;
      }
display_type();//寻到卡后显示出该卡的类型

printf("卡的类型:");
         for(i=0;i<2;i++)
{
temp=g_ucTempbuf[i];
printf("%X",temp);

}

      status = PcdAnticoll(g_ucTempbuf);//防冲撞
      if (status != MI_OK)
      { continue; }
display_cardnum();//显示寻到的卡的序列号

////////以下为超级终端打印出的内容////////////////////////

printf("卡序列号："); //超级终端显示,
for(i=0;i<4;i++)
{
temp=g_ucTempbuf[i];
printf("%X",temp);

}
status = PcdAnticoll(g_ucTempbuf);//防冲撞
//temp=m1erea;

//printf("%X\n",temp);
///////////////////////////////////////////////////////////
      status = PcdSelect(g_ucTempbuf);//选定卡片
      if (status != MI_OK)
      { continue; }

      status = PcdAuthState(PICC_AUTHENT1A, 1, DefaultKey, g_ucTempbuf);//验证卡片密码
      if (status != MI_OK)
      { continue; }

      status = PcdWrite(1, data1);//写块
      if (status != MI_OK)
      { continue; }
while(1)
{
      status = PcdRequest(PICC_REQIDL, g_ucTempbuf);//寻卡
      if (status != MI_OK)
      {
   continue;
      }
   status = PcdAnticoll(g_ucTempbuf);//防冲撞
      if (status != MI_OK)
      { continue; }
display_cardnum();//显示寻到的卡的序列号

status = PcdSelect(g_ucTempbuf);//选定卡片
      if (status != MI_OK)
      { continue; }

      status = PcdAuthState(PICC_AUTHENT1A, 1, DefaultKey, g_ucTempbuf);//验证卡片密码
      if (status != MI_OK)
      { continue; }

      status = PcdValue(PICC_DECREMENT,1,data2);//扣款
      if (status != MI_OK)
      { continue; }
   display_xiaofeicarddat();//消费

/* status = PcdValue(PICC_INCREMENT,1,data2);//充值
      if (status != MI_OK)
      { continue; }
           */
      status = PcdBakValue(1, 2);//块备份
      if (status != MI_OK)
      { continue; }

      status = PcdRead(2, g_ucTempbuf);//读块
      if (status != MI_OK)
      { continue; }
        printf("卡读块："); //超级终端显示,
      for(i=0;i<16;i++)
{
temp=g_ucTempbuf[i];
printf("%X",temp);

}

   printf("\n");
      display_carddat();//显示数据
      //memcpy(data1,g_ucTempbuf,16);
LED_GREEN = 0;
FM_QI= 0;
delay1(100);
LED_GREEN = 1;
FM_QI= 1;
delay1(100);
LED_GREEN = 0;
FM_QI= 0;
delay1(200);
LED_GREEN = 1;
FM_QI= 1;
delay1(600);
   PcdHalt();
   //PcdAntennaOff();
   printf("test1：");
}
}

帐号		自动登录	找回密码
密码			立即注册