hextoint

int hexConvert(char HexChar){
  switch(HexChar){
    case '0':
        return 0;
        break;
    case '1':
        return 1;
        break;
    case '2':
        return 2;
        break;
    case '3':
        return 3;
        break;
    case '4':
        return 4;
        break;
    case '5':
        return 5;
        break;
    case '6':
        return 6;
        break;
    case '7':
        return 7;
        break;
    case '8':
        return 8;
        break;
    case '9':
        return 9;
        break;
    case 'A':
    case 'a':
        return 10;
        break;
    case 'B':
    case 'b':
        return 11;
        break;
    case 'C':
    case 'c':
        return 12;
        break;
    case 'D':
    case 'd':
        return 13;
        break;
    case 'E':
    case 'e':
        return 14;
        break;
    case 'F':
    case 'f':
        return 15;
        break;
    default:
        return 0;
        break;
  }



}