Subject:
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SDK?
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 11 Nov 1998 05:58:31 GMT
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Viewed:
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2694 times
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Cwikla, Brian wrote in message <255199E650C3D11194BF00805FA785365101AB@cs03mail.BestBuy.com>...
> Well, I figure I've been lurking long enough and time to share some
> questions and thoughts.
>
> Question 1:
> On page 4 of the Technical Reference in the Minstorms SDK there is a
> reference to a semaphore mechanism. It says: It is possible to implement a
Where do you purchase this SDK?
> semaphore mechanism (using one global variable and exploiting the
> instruction set) to provide exclusive access to shared resources. Could
> someone explain this? What it does, how to implement it and
> advantages/disadvantages.(Especially helpful if from a VB position) I've
> only come across the following and don't understand it totally: A semaphore
> is a software mechanism that is used to control and coordinate multiple
> program executions either on the same computer or on different computers on
> a network.
>
> Question 2:
>
> Is anyone attempting to use SMA(shape memory alloys) or 'muscle wire' in any
> of their projects? I've seen SMA pistons and thought those could come in
> really handy if it can be successfully connected to an RCX. Electric
> pistons that don't require any sort of air pressure.
>
> --------- -----------
>
> I've seen and thought up some ideas and was wondering about possibilities of
> implementing them with the RCX:
>
> A voice recognition module. The module has, say, 8 memory banks where there
> can be 3 or 4 seconds of 8-bit audio. Then, the on board voice recognition
> processors analyze the sound, match it to the proper bank and then send a
> number value to the RCX input port that it is attached to. I know this
> sounds really far fetched and probably really expensive, but I thought it
> would be cool to verbally tell my RCX to turn right etc...
>
> A sensor that contains 4-5 CCD cells. It would have enough visual power to
> determine movement direction from it's current orientation (left, right, up,
> down). I believe this could be done really inexpensively. I can't take
> credit for this idea, I believe I saw it on a post to the Minstorms forum.
>
> A gyroscope sensor that can determine angles/movement in 3d space. Number
> value returned to RCX determines what direction. Again, can't take credit
> for this one. Not sure where I saw it.
>
> Why not a sensor that relates to a remote beacon. The remote beacon is a
> battery operated, stand alone unit that emits a IR pulse/signal every x
> amount of time. The sensor connects to the RCX has four detectors on it all
> facing in opposite directions. The sensor receives the pulse and the two
> detectors that receive the strongest signal (from the direction the beacon
> is) derive some number that is sent to the RCX. Multiple beacons would have
> different 'carrier' signals so that the program can determine from what
> beacon the signal came. I think the reason I thought this one up is for a
> very specific device I was building and am not sure how useful this would be
> in a general sense. However, I can't imagine this being a
> complicated/expensive device to build.
>
> Okay, I'm sure a lot of my thoughts are a lot far fetched and not realistic,
> but maybe they will provide some ideas for related items to other people.
> Any feedback would be much appreciated.
>
> Thanks!
> Brian
>
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Message has 1 Reply:
 | | Re: SDK?
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| (...) You have it already. It is the OCX. Cheesy? Perhaps. You will have an infinitely better API available in short order. -Kekoa (26 years ago, 11-Nov-98, to lugnet.robotics)
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Message is in Reply To:
| | RCX Programming Questions and Sensor Ideas
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| Well, I figure I've been lurking long enough and time to share some questions and thoughts. Question 1: On page 4 of the Technical Reference in the Minstorms SDK there is a reference to a semaphore mechanism. It says: It is possible to implement a (...) (26 years ago, 10-Nov-98, to lugnet.robotics)
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