Dear Yathish,

From your code it seems that...
1. You are writing 1's on Columns, 0's on rows.
2. Then checking for which row has became 1.

		for ( temp = 0x01, count = 0; temp <= 0x08; temp <<= 1, count++ ) 
			if ( temp & ROW )
			{
				row = count ;
				break;
			}

 

I arrived to point 2 from your above code.

If that is correct then you are doing a terrible mistake.!!!

(As this might work in simulator, depends on how you simulate values on port pins)

Regards,
Mahesh