Re: [opendiag] Aw: Jeffs Interface - Loopback Test

grrr, I switched RTS and DTR around. DTR pulls RXD down.

----- Original Message -----
From: "Jeff Noxon" <jeff-opendiag@...>
To: <opendiag@egroups.com>
Sent: Monday, October 09, 2000 8:58 PM
Subject: Re: [opendiag] Aw: Jeffs Interface - Loopback Test

> On Mon, Oct 09, 2000 at 08:39:19PM +0200, benjamin@... wrote:
> > oh does that mean the whole put-it-low story is just about testing the
> > cable???
>
> You need a negative voltage on the RTS input to the adapter, or it will
> not function. It should be no higher than -3V. VWtool and Ross-Tech's
> software will put RTS low when they are running. When you run the
> loopback test in a communications program like Hypterterminal, RTS
> is high. I have not found any comm software that will allow RTS to be
> set low. That's why I suggest taking it from another serial port.
>
> In this way, you whatever you type in the comm program will echo back
> to your screen -- IF the adapter is working correctly.
>
> Regards,
>
> Jeff
>
>
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>
>

 
Received on Mon Oct 09 12:11:52 2000