Squeak on a BeagleBone
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It took me almost 20 years, but I finally thought of something
interesting to put on the Internet. ;) I've been experimenting with a BeagleBone (embedded ARM V7 platform) and was able to get Squeak 4.2 running without a problem. I put together a simple demo with a blog post and video, and thought the Squeak list may be interested (also, please let me know if I have any technical errors in my smalltalk code explanation). http://blog.unthinkable.org/ -David _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
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On Sat, Apr 21, 2012 at 12:14:27AM -0500, David Graham wrote:
> It took me almost 20 years, but I finally thought of something > interesting to put on the Internet. ;) > > I've been experimenting with a BeagleBone (embedded ARM V7 platform) and > was able to get Squeak 4.2 running without a problem. I put together a > simple demo with a blog post and video, and thought the Squeak list may > be interested (also, please let me know if I have any technical errors > in my smalltalk code explanation). > > http://blog.unthinkable.org/ Very nice! Thanks for posting this. CCed to the squeak-dev list, as I suspect that many non-beginners may be interested in this also :) Dave _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
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In reply to this post by David Graham
Very very interesting! I published a tiny blog post pointing yours!
2012/4/21 David Graham <[hidden email]> It took me almost 20 years, but I finally thought of something interesting to put on the Internet. ;) _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
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In reply to this post by David Graham
On 20.04.2012, at 22:14, David Graham wrote: > It took me almost 20 years, but I finally thought of something interesting to put on the Internet. ;) > > I've been experimenting with a BeagleBone (embedded ARM V7 platform) and was able to get Squeak 4.2 running without a problem. I put together a simple demo with a blog post and video, and thought the Squeak list may be interested (also, please let me know if I have any technical errors in my smalltalk code explanation). > > http://blog.unthinkable.org/ > > -David Very nice! There is one flaw in your code. You should never run Morphic code outside the UI process. But your "appendValue:" message does that. The correct way would be to write WorldState addDeferredUIMessage: [graph1 appendValue: lightValue] That will cause the block to be evaluated at the next display cycle. Of course, the proper way to make an updating Morph is to write a new Morph class. Then you could use Morphic's stepping mechanism to read the data and display it. But for a 10 line hack your code is not bad :) - Bert - _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
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On 4/21/12 2:16 PM, Bert Freudenberg wrote:
> On 20.04.2012, at 22:14, David Graham wrote: > >> It took me almost 20 years, but I finally thought of something interesting to put on the Internet. ;) >> >> I've been experimenting with a BeagleBone (embedded ARM V7 platform) and was able to get Squeak 4.2 running without a problem. I put together a simple demo with a blog post and video, and thought the Squeak list may be interested (also, please let me know if I have any technical errors in my smalltalk code explanation). >> >> http://blog.unthinkable.org/ >> >> -David > Very nice! > > There is one flaw in your code. You should never run Morphic code outside the UI process. But your "appendValue:" message does that. The correct way would be to write > > WorldState addDeferredUIMessage: [graph1 appendValue: lightValue] > > That will cause the block to be evaluated at the next display cycle. > > Of course, the proper way to make an updating Morph is to write a new Morph class. Then you could use Morphic's stepping mechanism to read the data and display it. Thanks Bert! I just started playing with Morphic and didn't know this. ( also, I just started learning smalltalk last year and mostly working with Zinc on Pharo). I was targeting my post at non-smalltalk arduino / BeagleBone devs and wanted to keep the syntax as simple as possible, but should I update the post? > > But for a 10 line hack your code is not bad :) I hear this a lot. ;) _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
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On 21.04.2012, at 13:25, David Graham wrote: > On 4/21/12 2:16 PM, Bert Freudenberg wrote: >> On 20.04.2012, at 22:14, David Graham wrote: >> >>> It took me almost 20 years, but I finally thought of something interesting to put on the Internet. ;) >>> >>> I've been experimenting with a BeagleBone (embedded ARM V7 platform) and was able to get Squeak 4.2 running without a problem. I put together a simple demo with a blog post and video, and thought the Squeak list may be interested (also, please let me know if I have any technical errors in my smalltalk code explanation). >>> >>> http://blog.unthinkable.org/ >>> >>> -David >> Very nice! >> >> There is one flaw in your code. You should never run Morphic code outside the UI process. But your "appendValue:" message does that. The correct way would be to write >> >> WorldState addDeferredUIMessage: [graph1 appendValue: lightValue] >> >> That will cause the block to be evaluated at the next display cycle. >> >> Of course, the proper way to make an updating Morph is to write a new Morph class. Then you could use Morphic's stepping mechanism to read the data and display it. > > Thanks Bert! I just started playing with Morphic and didn't know this. ( also, I just started learning smalltalk last year and mostly working with Zinc on Pharo). I was targeting my post at non-smalltalk arduino / BeagleBone devs and wanted to keep the syntax as simple as possible, but should I update the post? Well, people learn from examples, and it's better if the examples do not teach bad style. Here is a way to use Morphic's stepping properly from a workspace. This uses the Etoys mechanism of adding methods to an object directly (without having to make a new class in the browser): graph1 := GraphMorph new. graph1 assureUniClass. graph1 class compile: 'step self appendValue: 50 atRandom. super step'. graph1 class compile: 'stepTime ^50'. graph1 openInWorld. graph1 extent: 700@500. graph1 clear. This avoids having to create a background process, but I'm not sure if that makes it more clear to your audience. - Bert - >> But for a 10 line hack your code is not bad :) > I hear this a lot. ;) > > _______________________________________________ > Beginners mailing list > [hidden email] > http://lists.squeakfoundation.org/mailman/listinfo/beginners _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
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