Re: SS4000E Cable Wiring

[Danny Rodriguez <danny.rodriguez@comcast.net>]

Redboot gives a 1 second prompt through ttys0 before booting the image.

From everything that I have read, getting an active serial connection  
is pretty much step 1.


Sent from my iPhone

On Dec 27, 2009, at 10:51 AM, mark@jumpingbean.co.za wrote:

> H Danny,
>
> Will let you know if I make any progress. Feel like such a noob,  
> which I
> am when it comes to this embedded stuff.
>
> Just a quick question. Do I need to have the linux arm kernel  
> installed
> via tftp before the serial console shows any output? I should think  
> not
> and that the redboot? loader would output text to the console by  
> default?
> Is this correct?
>
> thanks
>
>
>
> > I wrote to this list a few weeks back with similar problems Mark.  I
> > couldn't get any communication via the serial ports.
> >
> > Two null modem cables and two idc10s to db9 brackets.  Tried
> > resoldering the correct pinouts on the bracket too,  nada.  No  
> > garbage
> > no nothing.
> >
> > Let us know if you make any headway with the cable.
> >
> > I'd also be interested in knowing if anyone has managed to get real
> > perfomance out of the unit, or at least found the bottlenecks that  
> > cap
> > it at around 5-6 MB/s
> >
> > Might be fun to trunk eth0 and eth1 too :-)
> >
> > Sent from my iPhone
> >
> > On Dec 27, 2009, at 2:19 AM, mark@jumpingbean.co.za wrote:
> >
> > > Hi,
> > >
> > > The java app is just to see if it possible to test the cable
> > > somehow. I
> > > can connect to the serial port on the pc and I know that that is
> > > working.
> > > Just writing the data receive event handlers now to see if I can get
> > > anything.
> > >
> > > I will try screen with the serial device too. Its all a learning
> > > curve for
> > > me so nothing is wasted :)
> > >
> > > Thanks
> > >
> > >
> > >
> > > > On 12/26/2009 06:26 AM, mark@jumpingbean.co.za wrote:
> > > > > I think I may have to write a little java app to see whats wrong
> > > > > with
> > > > > the
> > > > > cable. I can find any message on /var/log/message or /var/log/
> > > > > syslog so
> > > > > its a bit difficult to see if its just a poor soldering job or I  
> > > > > am
> > > > > doing
> > > > > something else wrong. May be the long way round but it holidays so
> > > > > got
> > > > > time to mess around with this stuff. Any pointers appreciated,
> > > >
> > > > what are you planning to use the java app for?  assuming you're
> > > > connecting to this serial port from (for example) a host's first  
> > > > USB
> > > > serial port, you should be able to try it out with plain ol' GNU
> > > > screen:
> > > >
> > > > screen /dev/ttyUSB0 115200
> > > >
> > > > (if your device defaults to a different baud rate, substitute it  
> > > > for
> > > > 115200).
> > > >
> > > > you'd get out of it like killing any other screen session: C-a C-k
> > > >
> > > > hth,
> > > >
> > > >   --dkg
> > >
> > >
> > >
> > > --
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