Thread: strange debugger results on atomic 16 bit variable

When you say "RXData is 32 deep", you mean that it has a size of 32 bytes? How many bytes is the size of RXData[0]?

But yeah, what you have shown should not result in overwriting memory unexpectedly; but that doesn't mean you are reading from memory correctly (although that's unlikely to result in the behaviour you observed for the unsigned int).

Note that you don't need the cast to const void* since the implicit type conversion from pointer to object type to const void* is always safe.

Your memcpy is wrong to start with (is this really your code, or just something you paraphrased from memory?)

> memcpy(radioID, (const void *)&RXData[9], sizeof(radioID));
You're missing an & on the first parameter.

Well you said atomic, and arrays can never be atomic.

Sure, it makes your memcpy valid, but it isn't solving your problem.

> I have unsigned int variable that throughout code is either assigned a 0 or a 1
So this variable is actually nowhere in your post then?

Your 'guess' at one line of code which isn't even to do with the thing you're observing just isn't going to get it done.

Post a whole program, or at least some cut-down version which demonstrates the problem.