![]() Why would the compiler think the state variable is unused? Isn’t the reason of using volatile here that changes to the variable could be missed? In fact, using volatile in this code example should not make any (functional) difference because loop() only writes the pin after reading the variable, and every change to the variable will cause a pin change in the next loop. The purpose is to ensure that the compiler doesn't optimize out what it will consider to be the unused state variable. ![]() Activity of approval and registration of firms thus started. Out of the 78 weeks training for the IRPS & IRSS Probationers. That would happen with or without the use of the volatile keyword. The Indian Railway Stores Service (IRSS) is one of the Group A central engineering services. IRPS and IRSS Probationers undergo 78 weeks. ![]() The purpose of this code is not to "store the pin state in a single byte". Desch (Notre Dame) for a presentation titled, Will the Real(ist). Use a volatile byte to store the pin state in a single byte: Please join the International Relations Speaker Series as they host Professor Michael C. Someone proposed to add this description for the example sketch on that page: This is the standard search page for the International Registry of Seismograph Stations. FYI, Arduino - Volatile is an outdated "zombie" version of the Arduino Language Reference. ![]()
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