Hey everyone,
I'm trying to use a 4x4 keypad to unlock a door strike using the
PIC16F84.
The keypad format is like this:
                                1    2    3    A
                                4    5    6    B
                                7    8    9    C
                                *    0    #    D
I think I have read the truth table wrong when writing the code.
The truth table is as follows:
b     1      1  0  0  0  1  0  0  0
u     2      0  1  0  0  1  0  0  0
t      3      0  0  1  0  1  0  0  0
t      4      0  0  0  1  1  0  0  0
o     5      1  0  0  0  0  1  0  0        button locations:
n     6      0  1  0  0  0  1  0  0                1    2       3      4

       7      0  0  1  0  0  1  0  0                5    6       7
8
l      8      0  0  0  1  0  1  0  0                9    10    11    12
o     9      1  0  0  0  0  0  1  0                13  14    15    16
c     10    0  1  0  0  0  0  1  0
a     11    0  0  1  0  0  0  1  0
t      12    0  0  0  1  0  0  1  0
i      13    1  0  0  0  0  0  0  1
o     14    0  1  0  0  0  0  0  1
n     15    0  0  1  0  0  0  0  1
       16    0  0  0  1  0  0  0  1
               5  6  7  8  1  2  3  4
                 terminal location

*1's indicate connected terminals when switch is closed
Any help would be appreciated.
Thanks
Chris Camerlin