Re: [avr-chat] Need critical section; how to implement semaphore without disabling interrupt

[hanzl]

> Is there a way to implement a semaphore without disabling the interrupt?
>
> Recall that some CPU (HC11?) have some exchange instruction that read and
> write to to a memory location in one atomonous instruction.

I think that AVR has no instruction of this type and thought there
might be ways to implement a semaphore without disabling the interrupt
these cumbersome ways would give you no advantage.

Vaclav Hanzl