what is d use of volatile in embedded systems,
what is diff b/n macros & constant
i am struct in these conscepts, help me
ravi
When an lvalue is defined with the volatile qualifier the compiler is not allowed
to optimize any reference or dereference away. Simply put: a volatile lvalue
can be changed behind your back and you always want to update the lvalue
asap and you always want the most up to date value from it.
macros were used for constants before the 'const' keyword saw the light. They
have not much in common though so their differences are huge.
kind regards,
Jos
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