Dnia 21-09-2011 o 20:30:29 Colin Law <[email protected]> napisaƂ(a):

>
> I don't know whether the first messages indicate a problem but it
> appears that I am not able to talk to the DS9097.

I think those first errors doesn't matter.
There with read timeout are relevant.

> The console serial port is working ok but I am not sure how to check
> whether there may be a problem with the second port which is the one
> the adaptor is plugged into.

Do you have both ports with db-9 connector? Can't You connect 1-wire  
adapter do ttyS0?

> One issue I am unsure about is what do do with DTR and RTS (these are
> not present on the serial ports).  Looking at the data sheets for the

The power is stolen from those lines. I think that +6v (instead of -6V) on  
one of those pins should be enough. I'm a self taught electronic(I have  
many holes in knowledge) so I might be wrong but form what I see on the  
schematics the diode passed though positive voltage from one of those pins  
to the regulator.
Look here.
http://pl.wikipedia.org/w/index.php?title=Plik:Diode-IV-Curve.svg&filetimestamp=20110422040516
http://datasheets.maxim-ic.com/en/ds/DS9097U-DS9097U-S09.pdf

 From where do you get those 6V? Is it from MAX232? It might be not enough  
to power the adapter. Does Your WRT54G has 12V power adapter.

You could also check the 1-wire bus. It should have +5V between the middle  
wires in rj11 it the adapter is working. Even without initialization.  
Compare the beahviour when only connected to Your USB<->serial cable.



-- 
p4trykx

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