[mythtv-users] I'm about to give up on this entire thing...

[Ray Olszewski]

At 07:50 AM 6/10/2003 -0400, John Klimek wrote:
>The Linux interface (perl script) doesn't work what-so-ever.  So, I've been
>testing with only the Windows interface (DTVCON).
>
>I wish I had a port debugger, but unless they are very cheap, it's not worth
>it for me to spend money on a one-time project.

Well ... I remember them as costing about $US5 ... but the one I have is a 
DB25, so you need to add the cost od DE9-DB25 adapters on both ends. (More 
history: I still have what I used to call my "RS232 fishing rod" -- a stack 
of about 10 devices, including gender changers, a port debugger, a breakout 
box, and at one end a cable,, that I used to use to debug serial-connection 
problems. More recently, I added to it an RS232 tap, which let me connect a 
second PC to monitor traffic in both directions. All of this was a big a 
pain as it sounds like, and I'm happy that these days, that stuff gathers 
dust.)

At this point, I do feel obliged to remind you that the site with the 
wiring diagrams also wells the required cable for $US15. Were I doing this 
project, I'd have bought one in the first place.


>What is this "null" that I need in the cable?
>
>Thanks for helping me...
>
>
>----- Original Message -----
>From: "Christian Hack" <christianh at pdd.edmi.com.au>
>To: "Discussion about mythtv" <mythtv-users at snowman.net>
>Sent: Tuesday, June 10, 2003 5:40 AM
>Subject: RE: [mythtv-users] I'm about to give up on this entire thing...
>
>
> > > -----Original Message-----
> > > From: mythtv-users-bounces at snowman.net
> > > [mailto:mythtv-users-bounces at snowman.net]On Behalf Of Bruce Markey
> > > Sent: Tuesday, 10 June 2003 6:40 PM
> > > To: Discussion about mythtv
> > > Subject: Re: [mythtv-users] I'm about to give up on this entire thing...
> > >
> > >
> > > John Klimek wrote:
> > > > Ok, I'm very close to giving up on this entire project.
> > > >
> > > > I am SOOO frustrated right now it's not even funny.
> > > >
> > > > Now, even when I only connect the TxD and Gnd, my receiver keeps
>turning
> > > > itself on and off.
> > >
> > > Opps, I overlooked this part in my earlier reply. Still I
> > > wonder if this is Linux serial port sending breaks.
> > >
> >
> > I've only partially followed this thread, so perhaps this is not possible
>or
> > has already been tried. Have you tried driving it with the windows
>interface
> > that's available rather than under linux?
> >
> > A serial port debugger would be damn useful here. We all have them here
> > since they can tell you one hell of a lot. We call them christmas trees
> > since they have green and red LEDs on them. Plugging one in to your
>decoder
> > box will tell you pretty quickly what line is driven (i.e. the transmit
> > line -> the receive line in the PC)
> >
> > Remember you'll need a null somewhere in there. i.e. TX from the decoder
>box
> > goes to RX on the PC and vice versa.
> >
> > Hope I haven't confused you more than you already were ;)
> >
> > CH
> >
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> >
>
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