Re: [Sdcc-user] What is the replacement of Keil nop() ?

[Alain P. <ala...@fr...>]

Le samedi 8 juin 2013 12:19:18 Alain Portal a écrit :
> Hi,
> 
> Le samedi 8 juin 2013 17:28:33 JIA Pei a écrit :
> > Hi, all:
> > 
> > Since a lot of the testing codes were written under Windows with Keil C51,
> > it's seriously a big problem for me to recompile everything under Linux
> > using sdcc.
> > 
> > Again, the following line is in one of my codes, which seems to declare a
> > function delayNOP() which pauses 4 CPU clocks.
> > 
> > *#define delayNOP(); {_nop_();_nop_();_nop_();_nop_();};*
> > 
> > However, what is the function equal to Keil C51 *_nop_()* in *sdcc* ?
> > 
> > I don't want to re-write the code, but just simply modify it and make it
> > work after flash it onto my board. So, can anybody help me please?
> 
> I don't remember if a such function exists in the sdcc libraries, but you can write your own as is:
> 
> #define Nop() \
>     __asm     \
>         nop   \
>     __endasm  \
> 
> #define delay4NOP() \
>     __asm     \
>         nop   \
>         nop   \
>         nop   \
>         nop   \
>     __endasm  \

Does it help?