keypad counter

mike5321

I want to count and store to eeprom the number of times each key is pressed on a 4x4 keypad. I have it working for the most part but would like some help to reduce all of the·"IF "statements. Attached is the code.


thank you

Jon Williams

Your program wants to use Words but you don't have enough space.· Since you can't press keys fast enough and enough times to kill your EEPROM, I suggest you dump the RAM variables for the key count and save them directly to EE.· You can do it like this:

Main:
· DO
··· GOSUB KeyScan
· LOOP UNTIL (press <> 0)······················· ' wait for key press
· DEBUG "Key pressed = ", HEX key, CR··········· ' show it

· READ (key * 2), Word temp····················· '·read·current key value
· temp = temp + 1······························· ' increment
· WRITE (key * 2), Word·temp···· ··············· ' save updated count

· FOR key = 0 TO 12····························· ' show all counters
··· READ (key * 2), temp························ ' read the key count
··· DEBUG "Key ", DEC2, ": ", DEC temp, CR·······' show it
· NEXT

· GOTO Main

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Jon Williams
Applications Engineer, Parallax

mike5321

This worked great.Thanks for your help.