Hello
I am working with volatile long variables, which are beeing modified in ISRs.
To ensure an atomic access to these variables outside of the ISRs, I am using a function which is making a copy of the value, while interrupts are disabled.
u32 ATOMIC32(volatile u32 *var)
//---------------------------------------------
// avoid ISR during access to the 4 bytes of a
// volatile long, which might be modified in ISR
// => Atomic volatile access oustide of ISR
//---------------------------------------------
{
u32 temp;
cli();
temp=*var;
sei();
return(temp);
}
My question is, if anybody knows a smarter (respectively more efficient) way to do this, (e.g. with a macro- or inline-definition)?
Thanks for any hint!
Pater
