On Mon, Oct 28, 2002 at 08:56:35AM -0500, Joe Sunday wrote:
> On Sun, Oct 27, 2002 at 09:12:33AM -0800, David Nicholas Kayal wrote:
>
> > I'm looking for a 5 volt signal.
> >
> > I have wires plugged into pins 2 and 25 of the parallel port.
> >
> > I have written a small program:
> >
> > #include <stdio.h>
> > #include <dev/ppbus/ppi.h>
> > #include <dev/ppbus/ppbconf.h>
> >
> > int main()
> > {
> > int fd;
> > while(1)
> > {
> > ioctl(fd, PPISDATA, 255);
> > }
> > }
>
> PPISDATA actually takes an int* argument. (The man page may be a tad
> confusing here.)
No it takes an u_int8_t* exactly as written in the manpage.
Using an int doesn't work in all cases.
I have no idea what part of the manpage is confusing.
> Try
> int main() {
> int fd;
> int d = 255;
u_int8_t d = 255;
> fd = open( "/dev/ppi0", O_RDWR );
>
> ioctl( fd, PPISDATA, &d );
>
> return 0;
> }
--
B.Walter COSMO-Project http://www.cosmo-project.de
[EMAIL PROTECTED] Usergroup [EMAIL PROTECTED]
To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-hackers" in the body of the message
