Keypad.h Library breaking at 16 columns

Projects Programming
1

hey all, got a project with a pretty large 6x16 button grid, and using keypad.h to drive it.

with 6 rows and 15 columns, everything runs just fine.

however, once i add column 16, the entire matrix no longer functions. i'm entirely unsure as to the why, i've swapped around the characters, used different pins, tried the same pins on other rows; all the hardware is functioning but the library seems to be breaking for reasons unknown.

is there some way to go a little deeper than the compile status window to know why this might be happening? i've looked at keypad.h itself but unfortunately i don't understand anything going on there...

thanks for any help!

-a

2

This doesn't look too good:

typedef struct {
    byte rows : 4;
    byte columns : 4;
} KeypadSize;

4 bits will only hold 0 to 15.

I am using a variant which looks like this:

typedef struct {
    byte rows;
    byte columns;
} KeypadSize;

I'm not sure what other changes I made, but that should be enough to fix this particular problem.

3

SWEET it works.

thank you!