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1 hz clock

 
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supermax



Joined: 27 Nov 2004
Posts: 1

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1 hz clock
PostPosted: Sat Nov 27, 2004 7:52 am     Reply with quote
How can i obtain a 1 hz clock with a 16f628, only using timer and interrupt? I can't use delay because this clock is to synchronise others operations.
Thanks
Max
Mark



Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA

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PostPosted: Sat Nov 27, 2004 11:31 am     Reply with quote
And you would be driving the PIC with what?
How accurate?
Haplo



Joined: 06 Sep 2003
Posts: 659
Location: Sydney, Australia

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PostPosted: Sat Nov 27, 2004 4:10 pm     Reply with quote
Configure Timer1 as a counter, with a 32.768KHz crystal. This way you can create 1Hz interrupts.
future



Joined: 14 May 2004
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PostPosted: Sat Nov 27, 2004 4:14 pm     Reply with quote
Configure a 100uSec timer, divide by 10 to obtain 1ms, by 100 and get 100mS and by 10 again to obtain 1S.

You can have many timings.
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Sun Nov 28, 2004 9:31 am     Reply with quote
Search this forum for "Real Time Clock" or 'RTC' and you will find many examples.
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