Re: [Gumstix-users] Please be gentle - newbie in tears!

[Tim E. <tim...@yr...>]

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:mhu...@lo...] 
Sent: 24 May 2008 21:31
To: tim...@yr...; '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: gum...@li...
[mailto:gum...@li...] On Behalf Of Tim
Everitt
Sent: Saturday, May 24, 2008 1:19 PM
To: 'Peter Vandrish'
Cc: gum...@li...
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 there's 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 I'm back at the units I'll try your suggestion and
switch the TX/RX lines.

 

Thanks, Tim.

 

  _____  

From: Peter Vandrish [mailto:pet...@gm...] 
Sent: 24 May 2008 17:54
To: tim...@yr...; 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...@yr...> 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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