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Taylorh140

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Taylorh140 last won the day on August 9 2021

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    LabVIEW 2016
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    2010

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  1. So now i can just add my string instead of concatenating them! but joking aside, I feel like this should be an inherited property of LVobject. It's interesting if that is the way it works. usually for multiplies you would take the operation depending on the binary operator inputs types. e.g. if you add u8 and a single float something would have to make a decision that upcasting to a single float is the right decision.
  2. Yeah well the thread is labeled debouncing. But this can be used any time you want to be absolutely sure there is a transition in a boolean input. Say in a noisy environment you need to be sure that a transition is actually was that initial input really an edge? How can we be really sure? I did find this reference useful: https://my.eng.utah.edu/~cs5780/debouncing.pdf It shows how different the debounce on switches can be as well.
  3. I do like the count. I was thinking about majority vote but it has the issue of being noisy around the 0 point. I think that this may correct at least periodic noise issue that the last method had: This method counts True +1 and False -1 and sums them until they surpass the count by one, only then does the input pass through. What i like about this: Simple enough Small periodic blips do not prevent state changes from ever occurring. Does not use time as a metric (but still need to be considered based on sampling rate) What I don't like about it: Uses two feedback nodes. (seems excessive). Functionally impure. (e.g. has statefulness although seems pretty necessary here) Looks messy compared to last implementation.
  4. I debounced a boolean. I feel like it could be better. This should take the initial value as output, and requires consistency for one second to change value. I'm curious what's out there or what has been tried? What i like about this: Simple to understand What I don't like about it: Small periodic blips could prevent state changes from ever occurring. Uses time as a metric (I actually prefer non-time metrics, like voting algorithm as they need less consideration) Uses two feedback nodes. (seems excessive). Takes one call after debounce time to propagate output. Functionally impure. (e.g. has statefulness although seems pretty necessary here)
  5. If you use a strategy not on the poll would you elaborate? I would appreciate it.
  6. So I really like the LabVIEW classes, but always end up with alot of vi's that do very little. I was curious what people do about it?
  7. You know, now that you mention it. getTypeInfo might be the answer i was looking for the whole time. (i just remembered that i can scan the output and have a list of enumerated type descriptors instead of calling everything all the time.) #duh. So making a call to the get type descriptor each time will not be necessary. I implemented everything using vim's I like the flexibility but now i realize it was a bad idea because of how difficult it is to debug. For some reason I cannot cast a variant to a little endian representation of its data. which was one of the main hurdles here. Thanks @LogMAN
  8. When doing flattening by iterating clusters. I make a crazy amount of calls to get type info. I was thinking it might be better to loop through the type string. From Variant to flattened string, But I dont have a good reference for how to decode. (I usually reverse the needed info from the openg library.) If you have any doc's or wiki pages to reference i would appreciate it.
  9. I was working with some vims. and looking for a way to check rather the data was pink or brown. if brown i can simply typecast. but if pink i need to pad the strings to a fixed size. I didn't want to iterate the elements of the cluster to check for strings or arrays.
  10. Turns out i used the wrong calling convention. C for the Labview.exe
  11. @ensegre I can't get the snippet to work. @drjdpowell when i run this method i keep getting an issue with the ui locking up. I tried moving it to any thread. But it still only copies the string one time. Im attempting named shared memory. (attached file) I'm questioning calling the LabVIEW.exe from the LabVIEW.exe (should be ok right). SM_Host.vi
  12. So I'm working on windows and i need to write bytes to a pointer location. I can use windows api functions but i would guess that somewhere there is a function that does this? And perhaps is more portable? How is it done typically?
  13. Well that's way more useful than i thought it would be then. so no need to distinguish, and better portability. This makes much more sense.
  14. So I'm a bit confused right now. perhaps you can set me straight on this. I'm running x64 windows and 32 bit LabVIEW. but when i'm Call Library Function Node and calling a dll from (SysWow64) the "pointer sized integers" are 64 bits? I would expect them to be 32 bit for 32 bit LabVIEW as i don't think it can interact with 64 bit dll's regarless of the pointer size. and yes I'm sure that 64 bits would hold the value. However, since we need to match the c prototype, it makes me think this will cause problems.
  15. Is there a Labview Type that changes from 32 to 64 bits based on rather your running a different development environment?
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