delay_ms() question

glenjoy · Joined: 18 Oct 2004 Posts: 21

What timer module does delay_ms command uses?

Thanks.

ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands

No timers are used by the delay-functions. Timing is based on the number of instructions in a for-next-loop. The exact number of instructions in the loop is determined at compile time and depends on the clock frequency you specified in the #delay statement.

DragonPIC · Joined: 11 Nov 2003 Posts: 118

Yep, no OS or anything with this compiler. Just counting instruction cycles.
_________________
-Matt

valemike · Guest

Furthermore, since they are 'software' time delays, then if you want to delay_ms(5), you are guaranteed at least 5 ms of delay. If interrupts hit and you service them, then this adds on to your 5 ms. That's why i say "at least"