uchar idata inside_pin[12]={0xdd,0xdd};
uchar idata rc500_serial_no[16]={0xaa,0xaa,0xaa,0xaa,0xaa};
uchar idata rc500_data_block_bak[16]={0xbb,0xbb,0xbb,0xbb,0xbb};
//--------------------------------------
void main(void)
{
  r_led_on();
  feed_dog();
  init_cpu_io();
  delay_ms(150);
  init_cpu_io();
  init_var();
  buzzer_on_moment();
  soft_reset_rc500();
  feed_dog();
  init_rc500();
  init_cpu();
  g_led_on();
  while(1)
     {
         feed_dog();
         if( (g_task1&0x01) == 0x01)
           {
              g_task1 &= ~0x01;
              g_state_rc500 = 1;
              config_rc500_request();
              g_rc500_softdog = 2000;    // 1s
           }
         if( (g_task1&0x02) == 0x02)
           {
              g_task1 &= ~0x02;
              g_state_rc500 = 2;
              config_rc500_anticollision();
           }
         if( (g_task1&0x04) == 0x04)
           {
              g_task1 &= ~0x04;
              g_state_rc500 = 3;
              get_rc500_card_serial();
              config_rc500_select_card();
           }
//--------------------------------------------------------
         if( (g_task1&0x08) == 0x08)
           {
              g_task1 &= ~0x08;
              g_state_rc500 = 4;
              config_rc500_pcd_loadkey();          // ok
           }
         if( (g_task1&0x10) == 0x10)
           {
              g_task1 &= ~0x10;
              g_state_rc500 = 5;
              config_rc500_picc_authenticate1();
           }
         if( (g_task1&0x20) == 0x20)
           {
              g_task1 &= ~0x20;
              g_state_rc500 = 6;
              config_rc500_picc_authenticate2();
           }
         if( (g_task1&0x40) == 0x40)
           {
              g_task1 &= ~0x40;
              g_state_rc500 = 7;
              config_rc500_inc_value();
           }          
         if( (g_task1&0x80) == 0x80)
           {
              g_task1 &= ~0x80;
              g_state_rc500 = 8;
              config_rc500_inc_data_1();
              g_task2 |= 0x01;
           }
         if( (g_task2&0x01) == 0x01)
           {
              g_task2 &= ~0x01;
              r_led_on();
              buzzer_on_moment();
              g_task1 |= 0x01;
           }
     }
}
//---------------------------------------------------------
void rc500_interrupt (void) interrupt 0  using 1
{
   cs_rc500 = 0;
   if( (interruptrq&0x20) == 0x20 )           // irq_timeout
      {
        g_task1 |= 0x01;
        command = PCD_IDLE;
      }
   else if( g_state_rc500==4 )
      {
        if( (errorflag&0x17)==0x00 )
           g_task1 |= 0x10;
        else
           g_task1 |= 0x01;
        command = PCD_IDLE;
      }
   else if( g_state_rc500==5 )
      {
 ......

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