#include<reg52.h>
#include<rc500.h>

void PcdSetTmo(uchar tmoLength)
{
   switch(tmoLength)
   {  
      case 1:                             // short timeout (1,0 ms)
         WriteRC(RegTimerClock,0x07);     // TAutoRestart=0,TPrescale=128
         WriteRC(RegTimerReload,0x6a);    // TReloadVal = 'h6a =106(dec)
         break;
      case 2:                             // medium timeout (1,5 ms)
         WriteRC(RegTimerClock,0x07);     // TAutoRestart=0,TPrescale=128
         WriteRC(RegTimerReload,0xa0);    // TReloadVal = 'ha0 =160(dec)
         break;
      case 3:                              // long timeout (6 ms)
         WriteRC(RegTimerClock,0x09);      // TAutoRestart=0,TPrescale=4*128
         WriteRC(RegTimerReload,0xa0);     // TReloadVal = 'ha0 =160(dec)
         break;
      case 4:                              // long timeout (9.6 ms)
         WriteRC(RegTimerClock,0x09);      // TAutoRestart=0,TPrescale=4*128
         WriteRC(RegTimerReload,0xff);     // TReloadVal = 'ff =255(dec)
         break;
      default:                             // short timeout (1,0 ms)
         WriteRC(RegTimerClock,0x07);      // TAutoRestart=0,TPrescale=128
         WriteRC(RegTimerReload,tmoLength);// TReloadVal = tmoLength
         break;
   }
   WriteRC(RegTimerControl,0X06);
}