You can get a null modem adapter from Radio shack and then use the existong serial cable that you have.  This will get you going today if you wanted.
----- Original Message -----
From: Tim Everitt
To: 'Marc Humphreys' ; 'General mailing list for gumstix users.'
Sent: Saturday, May 24, 2008 4:42 PM
Subject: Re: [Gumstix-users] Please be gentle - newbie in tears!

Thanks to everyone for the fast, focused and spot-on correct help.

 

I ordered the wrong serial cable part from Gumstix. Null modem cables now on order.

 

Regards, Tim.

 


From: Marc Humphreys [mailto:mhumphreys@logiclinkdesign.com]
Sent: 24 May 2008 21:31
To: tim.everitt@yr20.com; 'General mailing list for gumstix users.'
Subject: RE: [Gumstix-users] Please be gentle - newbie in tears!

 

Tim,

 

Gumstix sells both a regular serial a NULL modem cable. You need the null modem cable. The regular serial one has a green 8pin DIN the NULL modem one is grey one, the same color as the cable at the DB9 shell.

 

Make sure you have no hardware flow control on the port. This uses a simple 3 wire connection. RX, TX and GND.

 

Marc

 


From: gumstix-users-bounces@lists.sourceforge.net [mailto:gumstix-users-bounces@lists.sourceforge.net] On Behalf Of Tim Everitt
Sent: Saturday, May 24, 2008 1:19 PM
To: 'Peter Vandrish'
Cc: gumstix-users@lists.sourceforge.net
Subject: Re: [Gumstix-users] Please be gentle - newbie in tears!

 

Pete,

 

Thanks for the fast response.

The Gumstix-end serial cables are new and from Gumstix.

The PC end is a standard USB/serial cable presenting a DTE/male.

So, unless thereís something strange with the Gumstix cables and they present a DTE interface on a DCE female connector then nothing obviously wrong there. As soon as Iím back at the units Iíll try your suggestion and switch the TX/RX lines.

 

Thanks, Tim.

 


From: Peter Vandrish [mailto:peter.vandrish@gmail.com]
Sent: 24 May 2008 17:54
To: tim.everitt@yr20.com; General mailing list for gumstix users.
Subject: Re: [Gumstix-users] Please be gentle - newbie in tears!

 

Are your serial cables straight through or cross-over? Did you order the serial cable from gumstix?
I would say try switching the tx and rx lines of your serial cable if you have some spare wire lying around.
Pete

On Sat, May 24, 2008 at 1:51 PM, Tim Everitt <tim.everitt@yr20.com> wrote:

Hi,

I've just got a gumstix connex-400xm + console-st and also a verdex-x4m +
console-vx.

I've carefully assembled both systems, all seems well.

I connect a PC (Windows, hyperterm, 115200bps/8N1 no flow control) to the
relevant console ports, apply power to the gumstix systems and... nothing at
all on the serial port.

PC hyperterm and serial port is working ok to other hardware and a loopback
connector.
Power-on LEDs light up on the gumstix boards.
I've tried the other serial ports on each console board.
I've tried a different serial cable.
I've tried different COMport settings at the PC end (e.g. 9600bps).

Same behaviour on both the connex and verdex systems so I assume that there
isn't an isolated hardware fault.

Am I doing something completely dumb?
Does the gumstix smell a Windows PC and refuse to boot?
Please help!

Regards, Tim Everitt.



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