please read it ( real time)

[Darrel Taylor]

Whether it's Melanie's Olympic Timer, or my Elapsed Timer (wasn't specified). I can guarantee that if you are getting 1.5 second periods... the problem is in your program. Both Timer programs have been scrutinized thoroughly by many different people.

Unless you figure out what the problem is, this probably won't work either. However, this is the method you'll need to use, to measure exactly how long it takes to execute any block of PBP code.

instruction execution time
http://www.picbasic.co.uk/forum/show...=&threadid=365
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[crematory]

Hello

You can use one of maxim's real time clocks, the calculate sec,min,hour, day........

You can obtain an accuracy of 100% if you know how to use it well, also a nice feature is that you can use the built-in functions of I2C in PICBasic Pro to communicate with such RTCs.

I never have seen exact 1 sec displayed at exactly 1 sec duration, its some how 1 sec and 0.000034 some fractions...

So you better let the RTC calculate, and you control, its a nice idea, while you were thinking of a simple clock, you can do a full calender.