On Thu, Jul 12, 2001 at 02:25:24PM +0200, Frederic Corne wrote:
> the target machine is always into the select() and the the client get always
> 0 for status from ioctl (fd, PPRSTATUS, &status) ;
> ??? what is wrong ??
The problem is that the example is very bad. :-(
This is wrong:
int ready = Busy | nAck | nFault;
ioctl (fd, PPWCONTROL, &ready);
because Busy, nAck and nFault are status lines, not control lines.
The fact is that a PC isn't a printer, and its port is wired
differently. On top of that, I think that interrupt latency on PCs
kills any chance of being able to actually masquerade as a printer.
I'll add a note that says not to take the printer-side example too
Are you actually aiming to get two machines to communicate via
parallel port, or is that just practice to write a driver for a
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