Problem with optimisation of volatiles

Hi there All, I have a problem which seemed to be defying explanation, but I have come up with a theory. Could I possibly have some feedback on whether the following is likely, plausible, possible...
Problem with optimisation of volatiles

Hi there All, I have a problem which seemed to be defying explanation, but I have come up with a theory. Could I possibly have some feedback on whether the following is likely, plausible, possible...
Volatile variables

What is the meaning of Volatile used in a variable declaration? Thank's Sergio
Volatile variables

What is the meaning of Volatile used in a variable declaration? Thank's Sergio
C51: Getting to work volatile variable

Hello, I have beginners problem with getting to work volatile variable. Trying to get reusable function for debouncing and detecting key_up state for all declared keys but can't get it to work as expected...