How to implement a backcountimg timer in C?

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I am working on calibrations and measurements tests using a tool INCA from ETAS. I have a measure window to Display the values of variables. When I pause the measurement and again want to start at the same time interval, I am unable to do. It takes the universal System time and Plays again from that time interval. So, how can I implement a Backcounting timer? Any help would be appreciated.

What I have tried:

I really do not have any idea to try

Posted 22-Sep-16 21:06pm

Priya dimpu

Updated 23-Sep-16 0:24am

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CPallini 23-Sep-16 3:10am

Could you please elaborate? For instance what OS are you developing for?

[no name] 23-Sep-16 6:27am

One idea would be to do a bit of research, I found http://www.codeproject.com/Tips/82005/A-count-down-timer-in-c in about 10 seconds of googling.

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KarstenK · Answer 1 · 2016-09-23T00:24:00

It is a problem of your design. Normally is some class design implemented which enhances clarity. I guess you need a function "RestartTimer" which creates a brand new timer.

A backcounting timer is done by calculating the end time (in the future) and substract the actual time.

In Windows you have the SetTimer which is normally used in 1 second interval to update the user interface. Important is to know that you cant rely on the precision of that interval, so calculate your interval in own time variables!!!