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).
-David
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).
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
Very very interesting!
I published a tiny blog post pointing yours!
2012/4/21 David Graham david@unthinkable.org
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).
-David ______________________________**_________________ Beginners mailing list Beginners@lists.**squeakfoundation.orgBeginners@lists.squeakfoundation.org http://lists.squeakfoundation.**org/mailman/listinfo/beginnershttp://lists.squeakfoundation.org/mailman/listinfo/beginners
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).
-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 -
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).
-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. ;)
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).
-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. ;)
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