Re: [avr-gcc-list] WinAVR inline assembler

[E. Weddington]

Jens Andersen wrote:

> Hi list,
>
> Ive just by accident discovered that avr-gcc in
> the latest WinAVR disti supports inline assembler
> in the form:
>
> asm("ldi r16, 0x80");
> asm("sts 0x61, r16"); // CLKPR
>
> This is mutch closer to the Atmel syntax than
> the gnu assembler syntax.
>
> However if i try to use symbolic names from
> the header target specific header file (mega48)
> i get a undefined symbol error.
>
> Can someone explain a little more about this feature ?
> Is this a macro whitch expands to gnu syntax ?
>
>  
Inline assembly in GCC is kind of a strange beast. Take a look at the 
avr-libc user manual. There's a section in there that discusses how to 
write inline assembly in GCC. You can also look at the GCC user manual too.

Eric