Mailinglist Archive: opensuse (4570 mails)

[Jonathan Brooks <jonathan.brooks@xxxxxxxxxxxxxxxxxxxxxxxxxx>]

Paul wrote:
> hi,
> 
>> typing setserial -g /dev/ttyS? gives:
>>
>> /dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
>> /dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
>> /dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
>> /dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3
>>
>> Which seems okay?
> 
> Yes, they look ok, except no UART is specified for 1, 2, 3.  Although
> it could be connected to 0 and the UART is correct.  Check the UPS
> specifications to find out its UART.  You can correct this with
> setserial.  You can also use setserial to automatically configure the
> serial ports ("man setserial" for further information).
> 
>> However, cat /dev/ttyS0 gives absolutely nothing, no chatter, nothing.
> 
> It would give nothing.  Assuming the UPS understands some commands in
> the same way as a modem, you could just echo commands to it and this
> will be displayed on the screen with cat /dev/ttyS0.
> 
> For example, for a modem:
> 
> On console 1 ([CTRL] [ALT] [F1]), login as root and then execute:
> 
>   cat /dev/ttyS0
> 
> On console 2 ([CTRL] [ALT] [F2]), login as root and then execute:
> 
>   echo "AT" > /dev/ttyS0
> 
> and assuming the modem knows AT commands then it will reply and show
> the reply on console 1.
> 
> So, assuming a UPS has some standard commands (refer to the
> manufacturer's manual) then it will respond to commands sent by echo
> and display the output on console 1
> 
> --
> /Paul
> 
> "It's not about the ending, it's about the journey." - Lex Luthor
> 

Okay it's working. The serial comms package that minicom has as a
dependency (and was not installed on my machine) is:

"rzsz" X-, Y- and Z-Modem Data Transfer Protocols (ver 0.12.20-842)

I guess you must need this for serial comms to work properly. Under
normal circumstances I would imagine this is installed by default, but
when I selected not to have anything ISDN related (at installation), it
must have been auto-deselected (?). This is slightly odd, since just
because you don't want/have ISDN doesn't mean you don't have serial
devices.....?

Anyway, everything seems fine now.

Thanks for all your help.

Best wishes,

Jon.



-- 
Jonathan Brooks (Ph.D.)
Research Assistant. PaIN Group,
Department of Human Anatomy & Genetics,
University of Oxford, South Parks Road, Oxford, OX1 3QX
tel: +44(0)1865-282654
fax: +44(0)1865-282656
web: http://www.fmrib.ox.ac.uk/~jon