PIC16F877A读写ID卡程序，刷ID卡第一次正常，第二次不正常

1万 · 2023-2-26 17:57

1万 · 2023-2-26 18:01

//***********************************************
//函数名：id_Operate(void);
//入口参数：无
//出口参数：无
//函数作用：MAIN函数
//说明：
//***********************************************
void id_Operate(void)
{
uchar i=0;
if(id_OK_flag)                         //有ID刷卡
{
   if(work_mode==0)
   {
      i2c_readdata_8bit(ADD_ADMIN_CARD);                   //读母卡删除卡和ID卡末尾存储地址数据
      if((wreep_data[2]==readmin_card[2])&&(wreep_data[1]==readmin_card[1])&&(wreep_data[0]==readmin_card[0]))
      {
         if((readmin_card[7]==0XFF)&&(readmin_card[6]=0XFF))
         {
            wraddr_data[1]=0X00;
            wraddr_data[0]=0X00;
            i2c_wradd_data(FIRST_ID_ADDR);
            DelayMs(3000);
         }
         work_mode=ADD_ADMINCARD;                         //是增加母卡，准备存储ID卡数据
         voice_win6(VOICE_CARDADD);                      //播放锁已开
         id_wrover_flag=0;
         id_OK_flag=0;
         time_sec=20;
      }
      else if((wreep_data[2]==readmin_card[5])&&(wreep_data[1]==readmin_card[4])&&(wreep_data[0]==readmin_card[3]))
      {
         if((readmin_card[7]==0XFF)&&(readmin_card[6]=0XFF))
         {
            wraddr_data[1]==0X00;
            wraddr_data[0]==0X00;
            i2c_wradd_data(FIRST_ID_ADDR);
            DelayMs(3000);
         }
         work_mode=DEL_ADMINCARD;                         //是删除卡，准备删除存储器里ID卡数据
         voice_win6(VOICE_CARDEDL);                      //播放锁已开
         id_wrover_flag=0;
         id_OK_flag=0;
         time_sec=20;
      }
      else
      {
         work_mode=USER_CARD;                            //是用户卡，准备读取存储卡里信息对比
         newid_addr=0x0000;
         voice_win6(VOICE_CALLING);
         i=1;
      }
      i2c_readdata(FIRST_ID_ADDR);
      oldid_addr=reeep_data[1];                         //读取24C128里存储的地址数据
      oldid_addr=(oldid_addr<<8)+reeep_data[0];

      send_byte(0x11);
      send_byte(readmin_card[2]);
      send_byte(readmin_card[1]);
      send_byte(readmin_card[0]);
      send_byte(readmin_card[5]);
      send_byte(readmin_card[4]);
      send_byte(readmin_card[3]);
      send_byte(reeep_data[2]);
      send_byte(reeep_data[1]);
      send_byte(reeep_data[0]);
      send_byte(0x11);
   }
   while(id_OK_flag)
   {
      i2c_readdata(FIRST_ID_ADDR);
      oldid_addr=reeep_data[1];                         //读取24C128里存储的地址数据
      oldid_addr=(oldid_addr<<8)+reeep_data[0];
      send_byte(0x11);
      send_byte(reeep_data[2]);
      send_byte(reeep_data[1]);
      send_byte(reeep_data[0]);
      send_byte(0x11);
      switch(work_mode)

目标板第一次上电时，刷卡调用 i2c_readdata(FIRST_ID_ADDR);读取存储ID卡数据的地址是正确的，开锁设置标志，延时5秒标志清零后，再次调用读取FIRST_ID_ADDR地址里的数据就变成了0XFF，找了很久没找出问题，但上电复位重启后第一次正常，是什么原因，请大侠指教！

1万 · 2023-2-26 18:03

while(id_OK_flag)
   {
      i2c_readdata(FIRST_ID_ADDR);
      oldid_addr=reeep_data[1];                         //读取24C128里存储的地址数据
      oldid_addr=(oldid_addr<<8)+reeep_data[0];
      send_byte(0x11);
      send_byte(reeep_data[2]);
      send_byte(reeep_data[1]);
      send_byte(reeep_data[0]);
      send_byte(0x11);
      switch(work_mode)
         {
                  case    USER_CARD:
                              while(i)
                              {
                                 if(newid_addr<=oldid_addr)
                                 {
                                    i2c_readdata(newid_addr);
                                    if((wreep_data[2]==reeep_data[2])&&(wreep_data[1]==reeep_data[1])&&(wreep_data[0]==reeep_data[0]))
                                    {
                                       open_flag=1;
                                       OPEN_LOCK=1;
                                       CLR_TALK;                               //打开通话
                                       CLR_MIC;                               //打开门口机麦克
                                       voice_win6(VOICE_LOCKOPEN);             //播放锁已开
                                       time_sec=VOICE_TIME_LOCKOPEN;          //设置时长
                                       id_wrover_flag=0;
                                       id_OK_flag=0;
                                       work_mode=0;
                                       i=0;
                                    }
                                    else
                                    {
                                       newid_addr++;
                                       newid_addr++;
                                       newid_addr++;
                                    }
                                 }
                              }

                              break;
                  case ADD_ADMINCARD:
                              if(oldid_addr<LASTID_ADDR)       //小于最大地址
                              {
                                 send_byte(0x33);
                                 send_byte(wreep_data[2]);
                                 send_byte(wreep_data[1]);
                                 send_byte(wreep_data[0]);
                                 send_byte(0x33);
                                 i2c_writedata(oldid_addr);
                                 DelayMs(3000);
                                 i2c_readdata(oldid_addr);
                                 send_byte(0x55);
                                 send_byte(reeep_data[2]);
                                 send_byte(reeep_data[1]);
                                 send_byte(reeep_data[0]);
                                 send_byte(0x55);

                                 oldid_addr=oldid_addr+3;
                                 wraddr_data[1]=(oldid_addr>>8)&0XFF;
                                 wraddr_data[0]=oldid_addr&0XFF;
                                 i2c_wradd_data(FIRST_ID_ADDR);
                                 DelayMs(3000);
                                 voice_win6(VOICE_SUCC);
                                 send_byte(0x88);
                                 send_byte((oldid_addr>>8)&0XFF);
                                 send_byte(oldid_addr&0XFF);
                                 send_byte(0x88);
                                 id_wrover_flag=0;
                                 id_OK_flag=0;
                                 time_sec=10;
                              }
                              break;
                  case DEL_ADMINCARD:
                              break;
         default          :break;
      }
   }
}
}

1万 · 2023-2-26 18:04

示波器比较过两次的波形了吗？