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List:       tini
Subject:    Re: [TINI] Systronix STEP board question
From:       "Harris Cohen" <harris () mycornerdeli ! com>
Date:       2001-08-30 14:49:10
[Download RAW message or body]

Javakit worked without a null modem
but my external device required one.

Thank you.


----- Original Message -----
From: Bruce Boyes <bboyes@systronix.com>
To: <tini@dalsemi.com>
Sent: Wednesday, August 29, 2001 11:49 PM
Subject: Re: [TINI] Systronix STEP board question


> At 21:17 8/29/2001 -0400, you wrote:
> >>>>
> I recently switched from using DalSemi's
> Rev C socket board to Systronix's STEP
> board and my app no longer communicates
> to an external device on serial0.
>
> The Java app, TINI board and external device
> are identical. Only the socket boards have
> changed.  Because STEP serial0 is female
> and DalSemi socket Serial0 is male, I had
> to add a gender changer. Nothing else changed.
> I have also tried removing the JP5 jumper on the STEP.
>
> Does anyone have any recommendations?
>
> What could be the difference between the socket
> boards to cause my app to hang?
>
> Thank you,
>
> Harris
>
>
> STEP ports are wired as DCE so that a straight M-F cable is all that is
> needed to a PC in order to run JavaKit. On DCE, the DB9 pin 2 is TXD and
> pin 3 is RXD.
>
> The Dallas Rev C socket board shows DB9 pin 2 as RXD and pin 3 as TXD.
>
> So it appears that the Dallas socket is DTE and you were actually using a
> null modem cable from your PC to the Dallas socket. You don't need the
null
> modem from your PC to STEP.
>
> Can you connect with JavaKit? If you can then the entire connection is
> working OK.
>
> There is a STEP quick reference online at
> http://www.systronix.com/tini/step.htm and in looking at it myself the
text
> does say "straight cable" but it doesn't actually say that the ports are
> wired as DCE, so I will add that and post the revised quick ref tomorrow.
>
> Bruce Boyes
>
>
> ------- WWW.SYSTRONIX.COM ----------
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