Compiler/LAUNCHXL-F28069M: Volatile variables

user4957458 said:

If all optimisations are disabled, are all the variables of type volatile by default?

No

user4957458 said:

Or even so for critical variables there is the need to declare as volatile?

If a variable might change values due to something the compiler cannot control, then it needs to be marked volatile.  This is true without regard for whether optimization is used or not.  For further details please see this article.

Thanks and regards,

-George