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Partly off topic : 4x4 keypad and Explorer16 demo board

 
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MicFreak
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Partly off topic : 4x4 keypad and Explorer16 demo board
PostPosted: Sun Aug 02, 2009 4:33 am     Reply with quote
Can some one please help me how to HW wire this keypad:
http://tinypic.com/view.php?pic=9jen2o&s=3

This is the schematic and this is how my HW keypad looks like.
I have to connect this to my Explorer16 db.

5V goes directly to 5V but what about rows and columns?
Can I connect them directly to pin of the chip ( the pins on the J5 explorer board )?
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Aug 02, 2009 2:46 pm     Reply with quote
Study the Explorer16 Development Board User's Guide:
http://ww1.microchip.com/downloads/en/DeviceDoc/Explorer%2016%20User%20Guide%2051589a.pdf
Locate 7 pins that are free for use. Most of the pins seem to be already
connected to some external device (LCD, CAN bus, LEDs, switches, etc).
Try to find some free pins.
MicFreak
Guest
PostPosted: Mon Aug 03, 2009 11:13 am     Reply with quote
I have free pins on demo board but my problem is wiring keypad to demo board. Can I connect my keypad on the way that is presented on the schematics ? 5V to 5V and other keypad pins directly to chip pins ?
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Aug 03, 2009 11:15 am     Reply with quote
Post a list of your proposed connections between the keypad pins and
the PIC pins.
Guest
PostPosted: Tue Aug 04, 2009 4:07 am     Reply with quote
On my prototype I will have whole PORTG and PORTC "free".
Regarding the explorer demo board I would like to use the same ports ( G and C ). RC12 - 15 and G 1 - 4.

Can I solder it on this way ?
MicFreak
Guest
PostPosted: Sat Sep 12, 2009 1:34 pm     Reply with quote
Hi guys !

I finally get the working keypad and I connected it to demo board.
What I want to learn is how to use ICD2 debugger to see if the keypads are registered. This is just for me to learn...

I know I have to set breakpoints but I don't know how to "watch" if the key was pressed or not.

I just want to understand how to use debugger for such cases.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Sep 12, 2009 3:10 pm     Reply with quote
Here is how to use a Watch Window with the ICD2 debugger in MPLAB:
http://www.ccsinfo.com/forum/viewtopic.php?t=23151&start=9
MicFreak
Guest
PostPosted: Sun Sep 13, 2009 5:02 am     Reply with quote
Than you for your answer ! This is what i need.

I removed the resistors from the keypad and connected the keypad pins directly to picmicro. Because i use pic24fjxxx i need to know how what drop down values should i set for "watching".

I cant use CCP_1.
Guest
PostPosted: Sun Sep 13, 2009 5:07 am     Reply with quote
Ups sorry, i was thinking on the left top drop down menu...
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