[plug] Serial port fun

[Mark Nold]

John,

You didn't happen to go to SBSH did you?

mn




Mark Nold
markn at enspace.com
Senior Consultant

Change is inevitable, except from vending machines.




On Sunday, 29 April 2001 10:01, John Breen [SMTP:wombat at redback.apana.org.au] 
wrote:
> On Sun, 29 Apr 2001, Kai wrote:
> > ----- Original Message -----
> > From: "John Breen" <wombat at redback.apana.org.au>
> > To: <plug at plug.linux.org.au>
> > Sent: Sunday, April 29, 2001 7:16 PM
> > Subject: Re: [plug] Serial port fun
> >
> >
> > > On Sun, 29 Apr 2001, Kai wrote:
> > > > The 4 port serial card should've come with some doco, right?
> > > Doco....
> > >
> > > That's that piece of paper, right?
> >
> > Yeah, the card should have come with some sort of documentation so you know
> > how to configure it.
>
> Yup - I read it before I changed any jumper settings.  In fact it's sitting
> here now and I've checked it.
>
> >
> > > > More than likely need to run cat /proc/pci and see where the addresses
> > are
> > > > so you can get Linux to see the ports and use them.
> > >
> > > Oops, my fault - like many people it seems I didn't give enough details
> > > in
> > the
> > > first place...
> > >
> > > It's a jumpered card (not Shrug 'n' Pray), and it's ISA.
> >
> > what about cat /proc/interrupts ?
>
> ah, that may be worth a look - when I set the machine up tomorrow :)
>
> Apart from IRQ15 being used by the IDE secondary controller, it looks right
> though.
>
> >
> > > We plugged in the card, did a kernel compile with extended serial 
support,
> > >
> > (for
> > > more than 4 ports) and rebooted.  No sign of the ports.  After much
> > hunting
> > > around, we did a mknod to get 4 devices to show up.  So far so hoopy.
> > Then we
> > > did setserial for each of the ports (like this)
> > > # setserial /dev/ttyS4 irq 15 uart 16550
> > > # setserial /dev/ttyS5 irq 12 uart 16550
> > > # setserial /dev/ttyS6 irq 10 uart 16550
> > > # setserial /dev/ttyS7 irq 9 uart 16550
> >
> > I think the card will have some sort documentation to show you how to
> > configure it !
>
> as i said, yup - read it.  for each port, there's two jumpers.  one sets the
> i/o address (or the COM port number).  the other sets the IRQ.
>
> >
> > > now, ignoring the obvious IRQ conflicts here, that says that the first
> > port is
> > > COM4 with an IRQ of 14, the second COM5 with IRQ 12 and so on.  Am I
> > right?
> >
> > Did you check in setserial (man setserial I think) for the commonly used
> > IRQ's for existing processes?
>
> Ya, it just said don't use numbers other than 2(9), 3, 4, 5, 7, 9, 10, 11, 12
> and 15.
>
> Still, I'll just keep muddling along with it.  Sometimes I hate jumpered
> cards,
> but I find they tend to be a little more trouble-free once they're working :)
>
>  --
> Regards,
>
> John Breen
>
> +----------------------------------------------------+
> | John Breen                                         |
> | Contracting Delphi Developer                       |
> +----------------------------------------------------+
> | Ph (08) 9430-4003                                  |
> | wombat at redback.apana.org.au - john at fairport.com.au |
> +----------------------------------------------------+
>