Keypad Help

Hey guys, I am currently trying to interface a 4x4 matrix keypad to 89c52. i have conntected the keypad to 89C52 column and row. Pin 12 is for column1, pin 13 for col 2, pin 14 for col 3, pin 15 for col...
4x4 keypad

Hello, i was wondering if anyone could help me, to get my 4x4 keypad scanning function working. Its supposed to drive each column to zero one at a time and then poll each row in sequence for zeros....
3X4 Keypad

i connect row1->p0.0 row2->p0.1 row3->p0.2 row4->p0.3 colum1 ---->p0.4 column2---->p0.5 column3----->p0.5 i pull up all columns with 4.7k to vcc this keypad is telephone keypad please help me...
keypad notes

i want notes for programming 4*3 keypad using 8051 so can any one give some information about this .
keypad lcd

i need source code of keypad, LCD, sent into my web site