Delays and Interrupts: a little problem...

[rhaguiuda]

Hello Fellows...

One of the biggest problems when using delays and interrupts is that the compiler must disable interrupts while calling the delay function. (to prevent re-entrancy).

Some applications must use lots of delays to accomplish its tasks (like make some bit-bang communications timing just fine).
I wonder what programming techniques do you use to make less use of delays (when a delay is needed) that makes possible calling delays, and using interrupts at the same time.
Or, just some technique to make a precise delay time, not using delay_us, delay_ms or delay_cycles.

Thanks!
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[PCM programmer]

[ckielstra]

A technique I oftern use for timers is to create interrupt driven 'software timers'.

For every timer you want you create a global variable: