On 23 Aug 2008, at 12:04 am, Negm-Awad Amin wrote:
This is what a analog PLL do, when it loads/unloads a ramp.
Analogue PLL design (Audio to GHz RF) were my bread-and-butter for many years, so do be careful not to teach your granny to suck eggs here ;-)
If the system is busy, every timer-based solution will fail, because the timer does not guarante nothing of none.
So you're stuffed in any case then, since the only other way is to poll for a time change and there's no guarantee your main event loop will be run in a timely fashion either. Timers are in the event loop, so it's as broad as it's long... Since the OP wants to display time to 1 second resolution *on screen*, you are clearly not talking about wanting this to be very precise. You'll be capped at 16mS anyway. A timer running at a few hertz is simple, if not perfect nor scalable to a real-time OS.
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