_SFR_IO_ADDR（）的大小导致AVR GCC

Question

I am in a situation where I need to save addresses of IO ports to variables.

I've found that eg. _SFR_IO_ADDR(PORTB) gives address of PORTB.

What data type do I need to reliably contain the result of this macro? Will uint8_t suffice?

(I tried to google it, found nothing - sorry.)

Answer 1

The easiest way to do it is to just use a pointer. GCC will Do The Right Thing .

volatile char *pb = &PORTB;