There are two types of "standard" ribbon cable adaptors that go from
the 10 pin header to a db9.
IIRC, the "wrong" standard has the behaviour you are seeing. So you
might want to make sure that you have the right type.
Steve
Any hint what's the root cause of this issue?
For an experienced developer it could be easier and cheaper if this
could be fixed, e.g. with a soldering iron, instead of sending the
board back, e.g. from Europe.
Thanks
Dirk
> On Sat, Aug 23, 2008 at 11:33 AM, Joe <joe.p...@gmail.com
> <mailto:joe.p...@gmail.com>> wrote:
>
>
> OK, from reading some of the posts it sounds like I may have a bad
> serial on my beagleboard, but I thought I'd run it past you to verify
> that I am not missing something.
>
> I am running my beagleboard from a 5v power supply. I have the serial
> connected to my computer and I get a good display of the booting
> process. My issue is that I am unable to issue any commands to the
> beagleboard. Anything that I type using HyperTerm or TeraTerm doesn't
> show up (it sits at the OMAP3 beagleboard.org
> <http://beagleboard.org/> # prompt).
Maybe
http://elinux.org/BeagleBoardFAQ#Serial_connection_.231
Steps #1 - #4 can help.
Please note the 'ATTENTION' section of step #4
http://elinux.org/BeagleBoardFAQ#Serial_connection_.234
too.
Dirk
> On Sep 3, 2008, at 7:16 PM, Gerald Coley wrote:
>
>> Well, if you can replace U9, then you can avoid an RMA. It is very
>> tough to do. Then you will need to burn it in and then it could fial
>> agian. Otherwise, you will need to send it back.
>>
>> The issue is with U9 going bad. Although, we have received a few
>> boards back with these issues and found they worked fine. So, make
>> sure it is the issue. If you are sure, then request an RMA.
>>
>> It will take about 5 days to repair, burn in, and to retest the repair.
>>
>> Gerald
>>
>> On Wed, Sep 3, 2008 at 3:03 PM, Olivier Singla
>> <olivier...@gmail.com <mailto:olivier...@gmail.com>> wrote:
>>
>>
>> Gerald,
>>
>> Just got my beagle board from Digikey.
>> I have the very same issue as described here:
>> rs232 working only in one direction (beagle->pc).
>> I had it working once (pc->beagle). Also a few times I had garbage
>> characters
>> while typing. Now I have nothing, even after many power cycles.
>> Is there a way to avoid a RMA?
>>
>> Thanks,
>> ~Olivier
>>
>> On Aug 23, 7:08 pm, "Gerald Coley" <ger...@beagleboard.org
>> <mailto:ger...@beagleboard.org>> wrote:
>> > It does sound like the serial port is bad in one direction I
>> suggest you
>> > enter an RMA and return the board for repair. We have had a few
>> boards
>> > already with this issue.
>> >
>> > Gerald
>> >
>> > On Sat, Aug 23, 2008 at 11:33 AM, Joe <joe.plu...@gmail.com
>> <mailto:joe.plu...@gmail.com>> wrote:
>> >
>> > > OK, from reading some of the posts it sounds like I may have a bad
>> > > serial on my beagleboard, but I thought I'd run it past you to
>> verify
>> > > that I am not missing something.
>> >
>> > > I am running my beagleboard from a 5v power supply. I have
>> the serial
>> > > connected to my computer and I get a good display of the booting
>> > > process. My issue is that I am unable to issue any commands
>> to the
>> > > beagleboard. Anything that I type using HyperTerm or TeraTerm
>> doesn't
>> > > show up (it sits at the OMAP3 beagleboard.org
>> <http://beagleboard.org/> # prompt).
As I have found out the hard way there appear to be 2 types of these
IDC to DB9 connectors. One as above which is what you want and the other
where IDC:1 -> DB9:1, IDC:2 -> DB9:6, IDC:3 -> DB9:2, IDC:4 -> DB9:7
etc etc
It might be (without thinking about it too hard :-) ) with a paticular
serial cable the second (wrong) type of connector might give comms in
one direction only...
Bob.
The actual answer to your question is: You'll need the IDC to DB9
connector that came with your motherboard.
This answer is probably not much help to you.. Sorry for the noise.
Bob