Are you sure that the "open" worked? I notice that
you're calling it with the "O_NONBLOCK" flag which
means open could return without actually opening the
file. Have you tried running it in a debugger? It's
nearly impossible to debug it without more info,
unless it's pointing out obvious errors which somebody
else has already done.
-Steve
--- mohamed rafi <email@hidden> wrote:
>
> I had tried that one too.... Still no difference :-(
>
> Regards
> Rafi
>
> > strlen() returns the length of zero-terminated C
> > strings. Perhaps sizeof()
> > would work better.
> >
> > Steve
> >
> > > From: mohamed rafi <email@hidden>
> > > Date: Wed, 16 Feb 2005 15:52:05 -0800 (PST)
> > > To: <email@hidden>
> > > Subject: Request not getting sent to Device.
> > >
> > > Hi,
> > >
> > > I have a Serial Device, which I have connected
> to
> > my
> > > Mac through a Keyspan. I am trying to do Baud
> > > Synchronisation of the device, before sending
> > > commands/requests to it. I am using C to do the
> > same.
> > >
> > > Following is the piece of code I am using for
> > that:
> > >
> > > DEVICENAME = "/dev/tty.USA19H1b1P1.1"
> > > fd = open(DEVICENAME, O_RDWR | O_NONBLOCK);
> > > ..
> > > unsigned char baudArray[] =
> > > {0x01,0x00,0x96,0x00,0x02,0x95,0x4d,0x54,0x19};
> > >
> > > k = write(fd, baudArray, strlen(baudArray));
> > >
> > > How do I ensure that it gets transmitted to the
> > > device, and how can I get the output from the
> > device
> > > for this ?
> > >
> > > Thanks,
> > > Rafi SM
> >
> >
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