Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Volatile is the one of the keyword used in Embedded c for the variable declaration . Volatile keyword is used for the variable in which at every time power goes OFF, the variable will be reintialised in the memory.
Wow. Prabakaran - please don't post such a nonsense.
If I would write program on my PC with "volatile" qualifier for some variable, run and after that just shutdown computer. Will that variable still keep previous value if I will turn on my PC again and rerun program. Obviously not.
qualifier "volatile" is simply instruction to compiler telling that for this particular variable do not do any optimization. That simple. Otherwise compiler could place that variable into register or make some other clever stuff therefore this variable will not have always up to date value. Thus if thread will be preempted by other one or by interrupt, that variable (memory location) could have not latest value. There are some other use for volatile but they pretty much circle around "not optimize this"
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
