unsigned char BitSwitch(unsigned char byte){
         char buffer[8];
         itoa((int)byte,buffer,2);
         while(strlen(buffer)<8){
               strcpy(buffer+1,buffer);
               buffer[0]='0';
         }
         unsigned char mem,i;
         for(i=0;i<4;i++){
             mem=buffer[i];
             buffer[i]=buffer[7-i];
             buffer[7-i]=mem;
         }
         return (long int) strtol(buffer,0,2);
}