Hi, Thanks roelofh:
It works !!! *P1_5 = ! P1_5* is working fine !
Thank you so much...
On Sun, Jun 9, 2013 at 12:12 AM, roelof 't Hooft <roel...@itholland.nl>wrote:
> Hi,
>
> Ma XiaoJun told you to RTFM.
> Please do so.
>
>
> > I tried
> > 1)
> > #include <reg51.h>
> >
> > sbit Beep = P1_5 ;
> >
> >
> > which is wrong
>
> Of course it is wrong.
>
>
> > 2)
> > #include <reg51.h>
> > sbit Beep;
> > ....
> > Beep=~Beep;
>
> Somewhere Beep needs to be defined.
> Preferably in an included header file or at the top of
> your C file in which it is used.
>
>
> > 3)
> > #include <reg51.h>
>
> Why are you still including a header file of which sdcc
> tells you not to ?
> Again I am assuming you are using a recent sdcc version
> because you still did not show us what version you are
> using.
>
>
> > // sbit Beep = P1_5 ;
> >
> > ...
> > P1_5=~P1_5;
> >
> >
> > which is still wrong
>
> P1_5 is in the reg51.h file and also in the 8051.h file.
> You might want to try "p1_5 = !p1_5;".
> But the reg51.h is old and should not be used anymore as
> sdcc tells you with a warning.
>
> roelof
>
>
>
>
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