Hi to all engineers,

I am working on a project that has 5x5 keypad is used.
Just today I realized that 4 of it's keys are normally closed
and also 5th column is connected to RC2 and the rest to RD port (col)
and RB0 is connected to 5th Row and the rest of port D (Row).
The way I was using keypad scan was assumed every thing was connected 
to same port. Those normally closed keys are kind of confusing me because
when key is not pressed it will return 0 but in this case I can't 
take 0 as key pressed.
any recommendation or method should I use
any routine in c will appreciate.

I use 18f4550 with ccs c compiler.


Andre   

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