Ds1302

Dave A

I am trying to use the DS1302 to add the total time an object is being turned on over a time period.· I am not having any luck in stoping the clock.· I can set times, read times· and reference times.· But I am not sure how to write the code to stop, but not loose the existing time, so I can continue to add to the time. Somebody's help will be appreciated.

Thanks Dave

Jon Williams

According to the docs (page 6, Clock Halt Flag), you can stop the clock by setting bit 7 of the seconds register. So what you'd have to do is read the seconds, OR with %10000000, then write the seconds register back. When you want to restart the clock you'd read the seconds register, AND with %01111111, and then write it back.

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Jon Williams
Applications Engineer, Parallax

Jon Williams

Note: I just had a quick look at your program and found that you're using "LOOP" as a label -- you should avoid this so you can enable PBASIC 2.5 features: things like IF-THEN-ELSE, DO-LOOP, etc.

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Jon Williams
Applications Engineer, Parallax

Chris Savage

Dave,

·· Tech Support already replied to your e-mail on this question.

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Chris Savage
Parallax Tech Support
csavage@parallax.com