Subject:
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Re: Navigation using landmarks (Was: Re: lasers and RCX)
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 9 Jul 2002 15:37:09 GMT
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Viewed:
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658 times
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I was hoping, since the thread was already onto how to modify and mount the
mouse guts, that it would have been preceeded by a successful attempt to
interface the little beast. Since I already know quite a lot about how
tedious it is to get data into and out of the RCX, I was becoming
increasingly intrigued by how that might have been done. Guess I'm going to
have to wait some more, or else have a bit of a go myself ;)
I'm a laptop user at home and a trackball user here at work so my experience
with rodentia is somewhat limited :)
JB
In lugnet.robotics, Ralph Hempel writes:
> > I see all this nice stuff about trimming mouse bottoms and mounting the
> > device off of the central steering axis and stuff to try and catch rotation,
> > but I haven't spotted the posting about how people are actually getting the
> > x and y values from the chip into their RCX code.
> >
> > What did I miss?
>
> Nothing yet. I have a guy in England that's trying to use pbForth to
> do I2C comms. As I see it, there are two possiblilities here. One
> is a bit-bang interface on a sensor input port. Tricky to do with
> pbForth because it allows the normal 1 msec interrupt to run which sets
> the voltage low on the sensor pins every 3 msec.
>
> Another option is your suggestion of a simple IR interface. pbForth
> can easily change its baud rate to sample the mouse info.
>
> A final option is a PIC that gives us X/Y info on two sensor inputs....
>
> More thoughts?
>
> Cheers, Ralph
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Message has 1 Reply:
 | | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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| (...) I don't think anyone has actually *tried* this yet - but it's still worth discussing the *other* issues since we wouldn't want to go to the hassle of ripping apart mice until it's evident that it *could* work. The data stream from the mouse is (...) (22 years ago, 10-Jul-02, to lugnet.robotics)
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