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Interfacing of lcd 20x4 and keypad

 
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ankur_rustagi12



Joined: 29 Mar 2009
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Interfacing of lcd 20x4 and keypad
PostPosted: Sun Mar 29, 2009 10:19 am     Reply with quote
Hi, I am making a device which requires the interfacing of lcd 20x4 and keypad with pic microcontroller.

Can anybody help me with it? I am newbie, so don't have much info about it.

Thanx in advance
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Mar 29, 2009 2:40 pm     Reply with quote
20x4 LCD driver:
http://www.ccsinfo.com/forum/viewtopic.php?t=28268
Set the contrast pin on the LCD at 0.5 volts initially.

Keypad driver:
http://www.ccsinfo.com/forum/viewtopic.php?t=26333
Put 10K pull-up resistors on the row pins.


Put the LCD and the keypad on different pins.
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