Re: Untraceable problem with Minicom

[Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxx>]

Il 01/02/11 19.19, Marek Vasut ha scritto:
> On Sunday 09 January 2011 10:50:10 Shahnewaz Chowdhury wrote:
> > Dear all,
> >
> > I am facing an untraceable problem with minicom. Allow me to provide proper
> > details so that it will be easier to provide assistance.
> >
> > I am using a desktop PC with Ubuntu 10.10. It has only one serial port
> > (ttyS0) and I have verified that using the command " dmesg | grep tty ".
> >
> > My development board is called HDP6410, which is a clone of the SMDK6410.
> > The processor is S3C6410 with ARM 1176 JZ(F)-S core. After I start
> > minicom, when I connect the board to the pc using a null-modem cable and
> > power up the board I am supposed to see booting updates on minicom,
> > followed by a prompt that would allow me to access the board. However, I
> > do not see anything. I know that the serial port on the pc and the serial
> > cable are fully functional because I do get all the booting updates and
> > prompt when I use a custom serial communication software provided with the
> > board. However, I want to use minicom because the custom software provides
> > no means of transferring files.
> >
> > I added my username to the following groups : dialout, uucp and tty.
> >
> > I have also checked that ttyS0 has read/write permissions.
> >
> > My settings in minicom are as follows:
> >
> > Serial Device                           : /dev/ttyS0
> > Lockfile Location                     : /var/lock
> > Bps / Par / Bits                         : 115200 8N1
> > hardware flow control               : no
> > software flow control                : no
> >
> > I have tried running minicom both as normal user and root, but I still get
> > no output on the console when I power up the board. I know for sure that
> > the serial port on the board is working fine and it does send messages
> > once I power up the board. Something is wrong on the PC side. For some
> > reason when I run minicom, the connection is probably not established on
> > the PC side.
> >
> > Am I missing any essential configurations / settings ?
> >
> > I would highly appreciated some guidance on this. I have been trying for a
> > week now without any positive result. Please help.
> I) Stick a screwdriver between pins 2 and 3 of the RS232 and see if you get any
> output when you type into minicom window (loopback).
>
> II) Another possibility is you should connect it directly, not null-modem
>
> Cheers
> > Sincerely,
> > Shan
> _______________________________________________
> linux-arm mailing list
> linux-arm@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/linux-arm
Maybe you're using USB-RS232 adapter...?
And so you should put ttyUSB0 instead of ttyS0.
Sorry for question...

--
Giulio Benetti
R&D

MICRONOVA SRL
Sede: Via A. Niedda 3 - 35010 Vigonza (PD)



_______________________________________________
linux-arm mailing list
linux-arm@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/linux-arm