Still waiting to hear what the results are. Is it slow, fast, sometimes right, sometimes wrong? Is it close or all over the place?Originally Posted by fratello
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Still waiting to hear what the results are. Is it slow, fast, sometimes right, sometimes wrong? Is it close or all over the place?
-Bert
The glass is not half full or half empty, Its twice as big as needed for the job!
http://foamcasualty.com/ - Warbird R/C scratch building with foam!
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The clock run ok without read_temp, in all cases and run faster ( strange for me) if use this subroutine.
I try now with 9 bits resolution of DS18B20, wait for result !
Thanks for support !
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If DS18B20 it's in 9 bit mode, the clock run faster (!) with ~ 2 sec/hour (5 sec in 3 hours).
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Thats about .055%; you ARE using a crystal, not a resonator, right?
Anand
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Yes, I use a crystal. But, without code for DS18B20, the clock run correct (~ 1 sec/day).
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Hi,
If I read this correctly you have an interrupt frequency of 61.035Hz (prescaler 1:64, 256*64=16384, 1/0.016384=61.035Hz) when you ideally should have 61Hz - that's 0.057% off and as Anand says 2 seconds over one hour is 0.055%.
I currently have no idea why it starts running correct when you remove the DS1820 code - are you sure that's the case?
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Closer to .056, actually since its .055555.. So, you might me spot on..
Anand
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