FPGA: are typedef coercion dots bad for efficiency?

Howdy--
Using LV 2011 FPGA, I always get coercion dots when reading or writing to/from FIFO or Memory items typed with a typedef.ctl. Do these indicate some extra use of resources in the compiled code, or are they harmless?
Thanks a bunch all, and have a great day.
--Brad
Solved!
Go to Solution.

bcro wrote:
Awesome. For a minute there I was afraid I'd have to abandon typedefs..a scary prospect when you're as scatter-brained as I am.
Thanks a bunch Taper for the quick reply. Be Well.
Too answer this question yoursefl you could use
Tools >>> Profile "Show Buffer Allocations...
To bring up a toll that will show where the buffers are being created.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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Hi,
following problem:
1. I place a simple Control (Button 1) and connect it to an Indicator (Indicator 1) -> OK
2. I place a Button as Typedef. (Button 2) and connect it to an Indicator (Indicator 2) -> Coercion dot on Indicator 2 (I don't see the point of a boolean coercion, but OK)
3. I create a property node for Indicator 1 (Value) and try to connect a constant (right-click>Create>Constant -> the constant is grayed out and the error message is 'type definition not found or contains error'
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benMyer wrote:
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Why this coercion dot on array indicator from strict typedef?

Why is there a coercion dot on the second control?
I created a trivial 3 element array of doubles, and created an indicator by right clicking on it in the block diagram. That's the "CreateIndicator" control.
Then I did the same thing to create a second indicator on the same output wire, and from the front panel selected it and customized it to a strict typedef, saved, and applied changes. That's the "CreateIndicatorThenCustomize" control. It has a coercion dot on it, though. Why?
Thanks to anybody who can shed some light on this for me!
Solved!
Go to Solution.
Attachments:
CoercionMystery.vi ‏9 KB
CustomizedStrictTypedef.ctl ‏6 KB

cebailey wrote:
Thanks, Ben!
Seems weird that this would be considered a coercion. Why do they do it this way?
Q1)
What is the falicy? Is it that you should avoid coercion dots because they force copies, and yet in this case there is no copying involved so the avoidance advice is incorrect?
Q2)
Also, different question, why is Customize Control grayed out in the front panel Edit menu, as long as another control customization panel remains open from the previous use?
Q3)
Finally, how did I miss this after all this time? Well, you probably don't know how I missed it. Actually, if you do know, it might be better to leave it unsaid anyway....
Q1 Correct!
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take care,
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Ben Rayner
I am currently active on.. MainStream Preppers
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BADI for VA01 which are not for internal use ???

Hello Folks,
Im looking for BADIs which are not for internal use for the transaction VA01...
Could anyone send all the BADIS which can be implemented for VA01...
Thanks in advance...
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Hi there, you are lucky enough because I have found them almost a few days ago:
---------- BADI for VA01 ----------
A1) BADI
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Hi!
A small project is attached to show how red coercion dot appears if you remove"lib type definition.ctl" from library to a virtual folder. It is interesting that this affects only class property nodes. It does not affect class accessors ("setters") and indicators. The same happens if you move "type definition.ctl" from virtual folder to the library.
Picture shows changes in "vi in library.vi" block diagram.
The application works but a peaceful bad feeling remains ...
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Attachments:
type definition and library.zip ‏69 KB

I can't unfortunately look at your code right now, but there are a couple points to be made:
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"... after all, He's not a tame lion..."
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Rayner's Ridge is under construction

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