switch(keyflag)
{ case 0:P1=0X00; break;
case 1:P1=0XFF; break;
case 2:P1=table0[ i];break;
case 3:P1=table1[ i];break;
case 4:P1=table2[ i];break;
case 5:P1=table3[ i];break;
case 6:P1=table4[ i];break;
case 7:P1=table5[ i];break;
case 8:P1=table6[ i];break;
case 9:P1=table7[ i];break;
default:break;