Re: /dev/ttyS2 and /dev/ttyS3

From: Thorsten Kranzkowski (oajaci@wincor-nixdorf.com)
Date: Thu Feb 03 2000 - 23:58:04 EET

  • Next message: Terry Dawson: "Re: API and driver interface"

    On Thu, Feb 03, 2000 at 08:34:00PM +0100, Bernard Pidoux wrote:
    > "Brian J. McCarthy" wrote:
    > >
    > > I've created the following init file:
    > >
    > > [root@gateway /proc]# cat /etc/rc.d/rc.serial
    > > SETSERIAL=/bin/setserial
    > > echo "Configuring serial ports...."
    > > #
    > > ${SETSERIAL} /dev/ttyS0 uart 16550a port 0x3f0 irq 4 ^fourport
                                                ^^^^^^^^
    > > ${SETSERIAL} /dev/ttyS1 uart 16550a port 0x2f0 irq 3 ^fourport
                                                ^^^^^^^^

    Rather unusual for ttyS[01] - are you shure these are the right addresses?
    You said they're onboard, am I right?

    > > ${SETSERIAL} /dev/ttyS2 uart 16550a port 0x3e0 irq 10 ^fourport
                                                          ^^^^
    > > ${SETSERIAL} /dev/ttyS3 uart 16550a port 0x2e0 irq 10 ^fourport
                                                          ^^^^
    Just to be sure: Are these ___modified___ ISA ports or are they PCI so
    you try to share the interrupts?
    Emm - what does 'cat /proc/interrupts' tell us?

    > > #
    > > echo "done"
    [...]
    > >
    > > But aprsd and other apps still cannot use any ports except ttyS0. Below is
    > > the output from ioports.
    > >
    > > [root@gateway /proc]# cat ioports
    > > 0000-001f : dma1
    > > 0020-003f : pic1
    > > 0040-005f : timer
    > > 0060-006f : keyboard
    > > 0080-008f : dma page reg
    > > 00a0-00bf : pic2
    > > 00c0-00df : dma2
    > > 00f0-00ff : fpu
    > > 01f0-01f7 : ide0
    > > 02e0-02e7 : serial(set)
    > > 02f0-02f7 : serial(set)
    > > 03c0-03df : vga+
    > > 03e0-03e7 : serial(set)
    >
    > Is'nt ttyS0 address 3f0-3f7 overlapping
    > with 3f6 of ide0 ?

    Well spotted :-) - That may be the reason why _only_ his /dev/ttyS0 works:
    setserial _fails_ to set that weird address (because of the overlap) and
    keeps the default 0x3e8 .. 0x3ef, which is much more sensible for an
    onboard standard ttyS port :-))

    Brian: maybe you should change the '0' at the end of your port addresses
    to '8' and doublecheck that the address is correct then.

    > > 03f6-03f6 : ide0
    > > ec80-ecff : eth1
    > > ef80-ef9f : Intel Speedo3 Ethernet
    > > ffa0-ffa7 : ide0
    > > ffa8-ffaf : ide1
    > > [root@gateway /proc]#
    > >
    > > Brian McCarthy
    > > N7TUQ
    > >
    >
    > 73 de Bernard, f6bvp.
    > 

    -- 
| Thorsten Kranzkowski         Internet: lvd.icresj@uncw.edu                        |
| Mobile: ++49 161 7210230        Snail: Niemannsweg 30, 49201 Dissen, Germany |
| Ampr: dl8bcu@db0lj.#rpl.deu.eu, nefdmlnr.gpdbh@roskapostia.tunk.net [44.130.8.19]  |

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