8051 + keypad + LCD + RTC interfacing

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This topic has 1 reply, 2 voices, and was last updated 14 years, 1 month ago by AJISH ALFRED.

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May 27, 2012 at 1:52 pm #1820

Clinton Aquilina
Participant

Hi, I’m trying to create a system which accepts an input from a 12 button keypad (3 columns, 4 rows) which will be the minutes, the 8051 gets this input from the keypad, sends it to the ds12887 RTC, the RTC starts a countdown timer and the LCD displays the time (countdown)

Any help?

Thanks.

May 27, 2012 at 4:33 pm #7918

AJISH ALFRED
Participant

Hi Clinton,

I think interfacing the RTC will be the difficult part. Also make sure that you have enough I/O pins to interface all these.

First learn the datasheet of RTC and LCD. Design your circuit. Complete the hardware and then start coding.

All the best.
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