Keypad and DT's Instant Interrupts

[mister_e]

0-3 is 4 bits, so you have to configure to 4 COLUMNs.

maybe 4 colums and 3 row now?

on the other hand my comments in the code above are not right... sorry

for a whole 4X4 keypad it should be

    DEFINE KEYPAD_ROW 4 	 ' 4 ROW keypad
    DEFINE KEYPAD_ROW_PORT PORTB ' ROW port = PORTB
    DEFINE KEYPAD_ROW_BIT 4 	 ' ROW0 = PORTB.4
    DEFINE KEYPAD_COL 4 	 ' 4 COL keypad
    DEFINE KEYPAD_COL_PORT PORTB ' COL port = PORTB
    DEFINE KEYPAD_COL_BIT 0 	 ' COL0 = PORTB.0
    DEFINE KEYPAD_DEBOUNCEMS 20  ' debounce delay = 20 mSec
    DEFINE SCAN_ONCE 1

i have this setup on a EASYPIC4 board and their 4X4 keypad like this


And using the internal pull-up.

their keypad schematic is bellow
http://www.mikroe.com/pdf/keypad_board_schematic.pdf

[Homerclese]

Corrected to:

DEFINE KEYPAD_COL 4 ' 4 COL keypad (0-3)

DEFINE KEYPAD_COL_BIT 0 ' COL 0 = PORTB.0 (wires start at PORTB bit 0)

Keypad is now working properly.

Many thanks for your attention and efforts.

[Darrel Taylor]

Cool!

Highlighted Code.
Instant Interrupt Examples.
And the solution to a problem with DT in the title.

I think I'll just sit back and enjoy life for awhile.
<br>

[Homerclese]

I have noticed that the keypad display output occurs on the release of the keypress. The setup I have which is like a "musical chairs" type of game requires variable index capture of the first player to be detected on "keypress". Can I change this?
Also, in my old kepad routine I would lockout a team of 4 players who jumped the gun by removing that column from the scan, bit 0 in the example portion below.

If penaltyflagA = 0 then ' good start
PortB=%00001111
butn = butn +4
Goto PlayerB ' Pull the first row line LOW
Else ' penalty for this player
PortB=%00001110 ' remove this col from keypad scan for round

Where is the best place in this keypad code to do the same?

[mister_e]

Cool!

Highlighted Code.
Instant Interrupt Examples.
And the solution to a problem with DT in the title.

I think I'll just sit back and enjoy life for awhile.

<table><tr><td>Yeah, everything in the same post... but... hum hum, you forgot Macro and INCLUDE :which i'm now converted to... it's all your fault </td><td></td></tr></table>

Homer, can you post your whole code?