terminal to a serial port

[Kim Holburn]

At 9:51 AM +1100 02/2/15, Peter Barker wrote:
>On Fri, 15 Feb 2002, Kim Holburn wrote:
>
>> I did that, deleted all the modem setup and dial strings.  Set the
>> rate to 9600N81.
>
>The init strings shouldn't really matter - unless they are going to
>confuse whatever is at the end of the serial link.
>
>I use minicom as a serial console for the little sparc classic I have
>here. Works just fine, so keep working at it :-)
>
>>     ¦ E -    Bps/Par/Bits       : 9600 8N1                                  ¦
>
>Are these all the same numbers as used under NT?

They are standard serial port values and they are what I need to talk to a sun and many other network devices.

> > How do you start a session without dialing?  When I dial, nothing much
>> happens and it just keeps trying to dial again and again.
>
>Start a minicom session without dialling? My minicom (1.83.1) does not
>automatically dial anything (which I see as a good thing...).

OK then minicom is not able to talk to the serial port. 

>
>> >> > tail -f /dev/ttyS0
>> >> tail: /dev/ttyS0: Input/output error
>> >> tail: tail.c:728: recheck: Assertion `valid_file_spec (f)' failed.
>> >> Abort
>
>That _may_ just be tail not liking a device file as a source. My tail has
>no problems with the above command, however. But let's not go there.
>
>Some other ideas:
> - Are you sure the device is on ttys0? Martijn mentioned the
>off-by-oneness.

I've tried it on both serial ports at the back of the box.

> - connecting to a device directly on the serial port has _nothing_ to do
>with dialling. Tapping at strings at a modem to get it to dial does.
> - once you get the settings right, you should just be able to tap enter a
>few times to get whatever prompt the other end is sending you (certainly
>this is the way getty works)
> - check the interrupt counts, make sure they are going up
> - strace! Unfortunately, stracing minicom is a bastard; there's a _lot_
>of calls it makes for the terminal stuff.
> - I'm assuming you're using the same hardware setup for NT and Linux, so
>the hardware is all verified as connected correctly.

No, 2 completely different boxes

> - 9600 9N1 may not be the magic settings; what's used under NT?

9600 8N1 is what the remote device talks.

> - raspberry and potato sundaes

Do you cook the rasberries or eat the potatoes raw?

-- 
--
Kim Holburn  Network Consultant  P/F: +61 2 61258620 M: +61 0417820641
Email: kim.holburn at anu.edu.au - PGP Public Key on request

Life is complex - It has real and imaginary parts.
     Andrea Leistra (rec.arts.sf.written.Robert-jordan)