Subject:
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Re: Dual IR tower output
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Fri, 25 Jan 2002 16:20:51 GMT
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Viewed:
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450 times
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In lugnet.org.ca.rtltoronto, Ross Crawford writes:
> In lugnet.org.ca.rtltoronto, Martin Legault writes:
> > In lugnet.org.ca.rtltoronto, Calum Tsang writes:
> > > Here's a dumb question. Does anyone know if I attach two IR towers with a Y
> > > splitter on the serial port that both towers will transmit?
> > >
> > > I want to guarantee transmission across a playfield from two or more towers
> > > for this rtl10.1SP2 RobotSoccer event...
> > >
> > > Calum
> >
> > Hi Calum,
> >
> > nice try, but you migth have some trouble.
> >
> > first the IR tower like any RS-232 equipment also transmit back to the
> > computer,
> >
> > It migth work if you split only the signal going from computer to IR Tower
> >
> > the problem that migth arise is if the RCX need to send info back to the
> > computer witch is likely to be the case, and it is facing the IR tower not
> > fully connected, your computer won't ear it.
> >
> > another way to do it, could use some electronic to make the connection back to
> > the computer, and it would work.
>
> It'd be difficult - because the tower "powers down" after inactivity, the
> computer needs to "ask" it whether it's alive before sending data. And if it's
> not, no data will be sent. If you look at the firmdl & dll programs from legOS,
> you'll see this.
>
> The only way I can think around it would be to have each one connected to a
> separate port, and develop a program to talk to both. Not an easy task, though.
Okay, but I only want to send-the BBRC software only sends AFAIK, so I
wonder if that's still an issue. What you're saying is that the tower
interactive on initialization with the host PC-I wonder of this is the case
with BBRC. Is the IR "alive" done using say the DTR line on the serial
port, or is it actually interactive (ie, some bit of a transmission block
checks, and a return block is sent back) with the PC inband...
I guess there's only one way to find out...
(Mario, break out the crimper!)
Calum
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Message has 1 Reply:
 | | Re: Dual IR tower output
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| (...) Another thing you might want to think about, if we've got a few extra IR towers around - really, you're just trying to improve the coverage of the transmission elements. A spare IR tower has a set of transmission elements. So.. what would it (...) (22 years ago, 25-Jan-02, to lugnet.org.ca.rtltoronto)
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Message is in Reply To:
| | Re: Dual IR tower output
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| (...) It'd be difficult - because the tower "powers down" after inactivity, the computer needs to "ask" it whether it's alive before sending data. And if it's not, no data will be sent. If you look at the firmdl & dll programs from legOS, you'll see (...) (22 years ago, 24-Jan-02, to lugnet.org.ca.rtltoronto)
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