minicom should work... it does for me on my 7800...
HOWEVER, you must turn off Hardware flow control, enabled by default,
as that will hang it up every time.
Also...
My modem doesn't do well auto adjusting to the serial port bit rate
when hooked up to the 7800 (though it does fine on a windows pc).
E
--- In "Jegan Bose Vincent" <> wrote:
>
> Frank,
>
> Thanks for your suggestion, after removing the getty on ttyS1, I am
> able to open the serial port, but unfortunately either the minicom or
> my application is unable to read data from the modem connected on
> /dev/ttyS1, it appears like the data is being sent to the modem. I
> have a Telit GM862-GPS Eval Kit connected to the COM1 port. The same
> modem (kit) is working fine under Windows XP, Fedora, and a different
> ARM kit. Looks like fundamentally I am making some mistake.
>
> --- In Frank <fuzzoli@> wrote:
> >
> > Best guess is the ports are being held open by getty. By default,
> ttyS0
> > and ttyS1 are grabbed by the getty process. getty is what gives you
> the
> > serial port terminal access (if needed). With a null modem cable you
> > could use something like Windows HyperTerm to log onto your 7800.
> >
> > In your /etc/inittab file, you will see these two lines about 2/3
down:
> >
> > # By default, run gettys on both serial ports
> > T0:23:respawn:/sbin/getty -L ttyS0 115200 vt100
> > T1:23:respawn:/sbin/getty -L ttyS1 115200 vt100
> >
> > To gain access to ttyS1, as root, edit this file and comment out the
> > 'T1' entry:
> >
> > # By default, run gettys on both serial ports
> > T0:23:respawn:/sbin/getty -L ttyS0 115200 vt100
> > # T1:23:respawn:/sbin/getty -L ttyS1 115200 vt100
> >
> > Save the file, reboot, and you should be all set.
> >
> > Note #1: If you ever plan on using the serial port terminal (a good
> idea
> > in my opinion just in case the network access is down), then you must
> > leave at least one entry as is!
> >
> > Note #2: If you want to test your serial port access outside of a
> > program, use the above said null modem cable, do an 'apt-get
minicom',
> > and use it (minicom) as a terminal on the 7800 side. You can then
> > eliminate the hardware as any possible issue.
> >
> > Hope this helps.
> >
> > -Frank
> > Holland, PA
> >
> >
> > Jegan Bose Vincent wrote:
> > >
> > > Hi,
> > >
> > > I have ts-7800 board with Linux ts7800 2.6.21-ts #4 PREEMPT Tue
Jun 10
> > > 17:13:00 MST 2008 armv5tejl GNU/Linux on it. I am relatively new to
> > > the embedded development with very little knowledge in C/C++,
but I do
> > > have a vast experience with Java. I am not quite sure if this forum
> > > supports Java development on ts-7800, if not, if would greatly
> > > appreciate if some one can point me to right place. Here is what I
> > > have in the board after spending about 25 hours in compilation of
> > > these tools.
> > >
> > > JamVM 1.5.1 (A Tiny Java Virtual Machine)
> > > GNU Classpath 0.97.1 (Java class library implementation)
> > > RXTX 2.1-7r2 (Serial and Parallel communication library for Java)
> > >
> > > Now, my issue is, the RXTX library is unable to detect any serial
> > > ports in the board, I did not do any modifications to the
kernel, file
> > > system or anything, should I need to do something prior to get
access
> > > to /dev/ttyS1 or /dev/ttyS0. Please guide me.
> > >
> > > PS: I would me more than happy to share all these compiled
packages if
> > > some one is interested.
> > >
> > >
> >
>
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