Re: while(flag)
"David W. Schultz" <[email protected]> Sun, 8 Nov 2015 16:17:41 -0600
| Newsgroups | gmane.comp.hardware.texas-instruments.msp430.gcc.user |
|---|---|
| Organization | State of Total Disorganization |
| Message-ID | <[email protected]> |
On 11/08/2015 04:01 PM, Ian Chapman wrote:
> Hi all,
> I'm having difficulty understanding this situation.
> flag = 1;
> while ( 0 != flag )
> {
> code;
> }
If flag is changed within an interrupt, it must be declared as volatile:
volatile int flag;
Otherwise the compiler will see that it never changes and optimize
accordingly.
--
David W. Schultz
http://home.earthlink.net/~david.schultz
Returned for Regrooving
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