Accessing array of clusters

Hey everyone,
I'm new to Labview and am trying to create an array of clusters. I have a 16-channel TTL I/O interface and I want to access each channel of the I/O. Each channel has an input/output boolean button and an output high/low (0 or 5 V) boolean button. I want to be able to read what my output selection is set to with an enum indicator. What's the best way to be able to access, say, channel 7's input/output selection? Or how would I read channel 12's output setting? Thanks a bunch!

Hello!
Sounds good -- let us know if we can help out in any way!
Message Edited by Travis M. on 11-01-2005 11:19 AM
Travis M
LabVIEW R&D
National Instruments

Similar Messages

Accessing button properties in an array of clusters ...

I have a situation whose solution is eluding me.
I built an array of clusters (15 of clusters in the array). Each cluster is a boolean LED control and a path control.
The array is wired to various VIs. One of these VIs is supposed to
select a path from the array and then change the color of the LED that
is clustered with that path. The path part works because I am reading
the value of that array element. The problem is that I don't know how
to get to the associated LED properties.
I have used several approaches, but in all cases: when I change the color of the target LED, all 15 LEDs change color.
Inside of a while loop with indexing enabled, I have unbundled the
current cluster and then tried to apply a property node to the LED
element but all LEDs change color.
So the question is - How do I access the individual LED properties in an array of clusters?

In an array only the values can be different for different elements. The properties are the same for all elements.
You can work around this by using a color box, which has the color as the value.
Here is an example of a color box customized to look like a LED with an explanation of how it was created.
Try to take over the world!

Brick Wall Problem: Array of Clusters, Size of array from reference

Good Morning Forums,
I have hit a brick wall with my application and I am hoping somebody can help!
I have an array of clusters of indeterminate size (the cluster is generic, data contained not relevant.).
Inputs to the VI are: a reference to the array, and a variant containing the data.
My problem is I need to determine the array size from these two inputs and I cannot find a way to do it!
If the array contained a standard data type I can use the class name property to determine data type, and the size of the array returned from "select size" property to determine dimension size. With this information i can cast the variant into the correct data type and use this to determine the size of the array. If the data is a cluster the class name simply returns "cluster" so I cannot cast the variant and therefore am unable to determine the size.
I am not worried about casting the data (once i determine the size this bit is no issue), I just need to determine the size (and preferably number of dimensions) of the array. Can this be done?
Cheers for any help
J
John.P | Certified LabVIEW Architect | NI Alliance Member
Solved!
Go to Solution.

John.P wrote:
Good Morning Forums,
I am not worried about casting the data (once i determine the size this bit is no issue), I just need to determine the size (and preferably number of dimensions) of the array. Can this be done?
Cheers for any help
J
There seem to be a couple of potential solutions.:
#1 if the varient is created within LabVIEW you can wite size(s) to a varient attribute. This would be pretty straightforward and easy to implement- I imagine you would have thought of that so you may not have access to the code writing cluster to varient and it gets a bit trickier.
#2 cast the varient to string and return string length- this should give you a measure of total size and you would need to know the size per element of cluster (just cast one instance of cluster array to varient and then to string with size and size++) but this only returns the total size of the array since nDim arrays are actually stored sequentially.
Hope this helped
Jeff

Call library function node with array of clusters using array data pointer

Hello all.
I am writing a LabVIEW wrapper for an existing DLL function.
The function has, as one of its parameters, an array of structs. The struct is very simple, containing two integers. I am using the call library function node to access it.
In Labview I created an array of clusters, where the cluster has two 32-bit integers as its members. So far, so good.
Now I have to pass this in to the Call Library Function Node. Here I am running into trouble.
I have used The topic in LAVA and The topic in the knowledge base as my primary sources of information, though I have read a bunch of forum topics on the subject too.
I do understand that I could write a new function which takes as a parameter a struct with the size as the first member and an array as the second, and I might just do this and have it call the regular function, but I was hoping to do it more simply.
According to the C file which LabVIEW generates for me from the CLFN when I choose "Adapt to Type" and "Array Data Pointer", the prototype it is expecting is:
int32_t myFunc(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, void data[], int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
And the prototype of the function in my DLL is
int borland_dll myFunc(DWORD handle, usint channel,
int FIFOnumber, struct mStruct *data, int numWords, int *actualLoaded, int *actualStartIndex);
This looks like a match to me, but it doesn't work (I get garbage in data). From the topic in LAVA referenced above, I understood that it would work. It does not.
If I cast data to the pointer-to-pointer I get when I generate c code by wiring my struct to a CIN and generating, then I seem to get what I expect. But this seems to work when I choose "pointers to handles" too, and I would expect array data pointer to give a different result.
Is there any way to get this to work directly, or will I have to create a wrapper? (I am currently using LabVIEW 2011, but we have customers using 2009 and 2012, if not other versions as well).
Thank you.
Batya
Solved!
Go to Solution.

OK, here is more detailed information.
I have attached the VI.
This is the code from the "C" file created by right-clicking the CLN and creating a "C" file.
When the parameter in the CLN is set to "array data pointer":
/* Call Library source file */
#include "extcode.h"
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, void data[], int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, void data[], int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex)
/* Insert code here */
When the parameter is "pointers to handles":
/* Call Library source file */
#include "extcode.h"
/* lv_prolog.h and lv_epilog.h set up the correct alignment for LabVIEW data. */
#include "lv_prolog.h"
/* Typedefs */
typedef struct {
int32_t control;
int32_t data;
} TD2;
typedef struct {
int32_t dimSize;
TD2 data[1];
} TD1;
typedef TD1 **TD1Hdl;
#include "lv_epilog.h"
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex)
/* Insert code here */
When the parameter is set to "handles by value":
/* Call Library source file */
#include "extcode.h"
/* lv_prolog.h and lv_epilog.h set up the correct alignment for LabVIEW data. */
#include "lv_prolog.h"
/* Typedefs */
typedef struct {
int32_t control;
int32_t data;
} TD2;
typedef struct {
int32_t dimSize;
TD2 data[1];
} TD1;
typedef TD1 **TD1Hdl;
#include "lv_epilog.h"
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex)
/* Insert code here */
As to the DLL function, it is a bit more complicated than I explained above, in the current case. My VI calls the function by this name in one DLL, and that DLL loads a DLL and calls a function (with the same name) in the second DLL, which does the work. (Thanks Rolfk, for helping me with that one some time back!)
Here is the code in the first ("dispatcher") DLL:
int borland_dll Load_Transmit_FIFO_RTx(DWORD handle, usint channel, int FIFOnumber, struct FIFO_DATA_CONTROL *data, int numWords, int *actualLoaded, int *actualStartIndex)
t_DispatchTable *pDispatchTable = (t_DispatchTable *) handle;
int retStat = 0;
retStat = mCheckDispatchTable(pDispatchTable);
if (retStat < 0)
return retStat;
if (pDispatchTable->pLoad_Transmit_FIFO_RTx == NULL)
return edispatchercantfindfunction;
return pDispatchTable->pLoad_Transmit_FIFO_RTx(pDispatchTable->handlertx, channel, FIFOnumber, data, numWords, actualLoaded, actualStartIndex);
borland_dll is just "__declspec(dllexport)"
The current code in the DLL that does the work is:
// TEMP
typedef struct {
int control;
int data;
} TD2;
typedef struct {
int dimSize;
TD2 data[1];
} TD1;
typedef TD1 **TD1Hdl;
// END TEMP
int borland_dll Load_Transmit_FIFO_RTx(int handlertx, usint channel, int FIFOnumber, struct FIFO_DATA_CONTROL *data, int numWords, int *actualLoaded, int *actualStartIndex){
struct TRANSMIT_FIFO *ptxFIFO; //pointer to transmit FIFO structure
usint *pFIFOlist; //pointer to array of FIFO pointers to FIFO structures
int FIFOentry, numLoaded;
usint *lclData;
usint nextEntryToTransmit;
// TEMP
FILE *pFile;
int i;
TD1** ppTD = (TD1**) data;
TD1 *pTD = *ppTD;
pFile = fopen("LoadFIFOLog.txt", "w");
fprintf(pFile, "Starting Load FIFO with %d data words, data pointer 0x%x, with the following data&colon; \n", numWords, data);
for (i = 0; i < numWords; i++) {
fprintf(pFile, "%d: control--0x%x, data--0x%x \n", i, data[i].control, data[i].data);
fflush(pFile);
fprintf(pFile, "OK, using CIN generated structures: dimSize %d, with the following data&colon; \n", pTD->dimSize);
for (i = 0; i < numWords; i++) {
fprintf(pFile, "%d: control--0x%x, data--0x%x \n", i, pTD->data[i].control, pTD->data[i].data);
fflush(pFile);
// END TEMP
if ((handlertx) <0 || (handlertx >= NUMCARDS)) return ebadhandle;
if (cardrtx[handlertx].allocated != 1) return ebadhandle;
pFIFOlist = (usint *) (cardrtx[handlertx].segaddr + cardrtx[handlertx].glob->dpchn[channel].tr_stk_ptr);
pFIFOlist += FIFOnumber;
ptxFIFO = (struct TRANSMIT_FIFO *)(cardrtx[handlertx].segaddr + *pFIFOlist);
//use local copy of ptxFIFO->nextEntryToTransmit to simplify algorithm
nextEntryToTransmit = ptxFIFO->nextEntryToTransmit;
//on entering this routine nextEntryToLoad is set to the entry following the last entry loaded
//this is what we need to load now unless it's at the end of the FIFO in which case we need to wrap around
if ( ptxFIFO->nextEntryToLoad >= ptxFIFO->numEntries)
*actualStartIndex = 0;
else
*actualStartIndex = ptxFIFO->nextEntryToLoad;
//if nextEntryToLoad points to the last entry in the FIFO and nextEntryToTransmit points to the first, the FIFO is full
//also if nextEntryToLoad == nextEntryToTransmit the FIFO is full and we exit without loading anything
if (( (( ptxFIFO->nextEntryToLoad >= ptxFIFO->numEntries) && (nextEntryToTransmit == 0)) ||
( ptxFIFO->nextEntryToLoad == nextEntryToTransmit)) && (ptxFIFO->nextEntryToLoad != INITIAL_ENTRY)){
*actualLoaded = 0; //FIFO is full already, we can't add anything
return 0; //this is not a failure, we just have nothing to do, this is indicated in actualLoaded
numLoaded = 0;
lclData = (usint *)data; //must use 16 bit writes to the module
//conditions are dealt with inside the for loop rather than in the for statement itself
for (FIFOentry = *actualStartIndex; ; FIFOentry++) {
//if we reached the end of the FIFO
//if the module is about to transmit the first element of the FIFO, the FIFO is full and we're done
//OR if the module is about to transmit the element we're about to fill in, we're done - the
//exception is if this is the first element we're filling in which means the FIFO is empty
if ((( FIFOentry >= ptxFIFO->numEntries) && (nextEntryToTransmit == 0)) ||
((FIFOentry == nextEntryToTransmit) && (FIFOentry != *actualStartIndex) )){
*actualLoaded = numLoaded;
//set nextEntryToLoad to the end of the FIFO, we'll set it to the beginning next time
//this allows us to distinguish between full and empty: nextEntryToLoad == nextEntryToTransmit means empty
ptxFIFO->nextEntryToLoad = FIFOentry;
return 0;
//we reached the end but can continue loading from the top of the FIFO
if ( FIFOentry >= ptxFIFO->numEntries)
FIFOentry = 0;
//load the control word
ptxFIFO->FifoData[FIFOentry * 3] = *lclData++;
//skip the high of the control word, the module only has a 16 bit field for control
lclData++;
//now put in the data
ptxFIFO->FifoData[(FIFOentry * 3) + 2] = *lclData++;
ptxFIFO->FifoData[(FIFOentry * 3) + 1] = *lclData++;
numLoaded++;
//we're done because we loaded everything the user asked for
if (numLoaded >= numWords) {
*actualLoaded = numLoaded;
ptxFIFO->nextEntryToLoad = FIFOentry+1;
return 0;
//if we reached here, we're done because the FIFO is full
*actualLoaded = numLoaded;
ptxFIFO->nextEntryToLoad = FIFOentry;
fclose (pFile);
return 0;
As you can see, I added a temporary diagnostic with the structures that were created in the "Handles by value" case, and print out the data. I see what is expected, whichever of the options I pick in the CLN!
I understood (from the information in the two links I mentioned in my original post, and from the name of the option itself) that "array data pointer" should pass the array of data itself, without the dimSize field. But that does not seem to be what is happening.
Batya
Attachments:
ExcM4k Load Transmit FIFO.vi ‏15 KB

Update a slider insider an array of clusters

I have an array of clusters. Each clusters has several controls, one of
which is a slider. I want to change the scale of the slider
dynamically, since I have one slider per variable in my system. I'm
using a for loop to access each cluster in the array and update the
scale of the slider to match the range of the variable. But when doing
this, the scales in all the sliders are updated at once, thus all
sliders end up having the range of the last variable.
Is there a way to avoid this automatic update of all the elements in an array?

In the unlikely chance that your array size is fixed you could work with a cluster of clusters
You can then use the Controls[] property to access the individual maximum and scales property nodes.
Incidently I had seen this before http://forums.ni.com/ni/board/message?board.id=170&message.id=170076&query.id=49401#M170076. There are some tips on how to get around the array to cluster limitations. They might apply to you.
David
Message Edited by David Crawford on 06-21-2006 07:53 AM
Message Edited by David Crawford on 06-21-2006 07:53 AM
Attachments:
Cluster Of 5.jpg ‏31 KB

Reference to Array of Clusters with an array element

Hi,
I have an array of clusters CONTROL (calling it as "top level cluster array") with one of the cluster elements being a cluster array (please see attached).
I plan to pass "Reference" of this top level cluster to different VIs (like add element VI, insert element VI, delete element VI etc) and access (add/modify delete) the elements in this array.
In my code, how do I typecast the Array Element (cluster) to the inner cluster (as shown in the figure) ?
I am using LV RT on PXI.
Solved!
Go to Solution.

You cannot use references in the same way that you use pointers around in C. LabVIEW does not manage memory in the same way that C does. This is actually a good thing, though C programmers find it "cumbersome" or "restrictive". I have also programmed in C, and frankly I prefer LabVIEW's memory management any day of the week.
You had not initially mentioned that this was going to be done in multiple places at (potentially) the same time. Given that, my recommendation is to look into using Action Engines. They provide a means of basically providing a one-location acccess for your data. By using a single VI to access/modify your data you preclude the generation of race conditions. You may also want to join this with the concept of using variants to provide a means to quickly find your data rather than looping to find the element you're interested in. This technique has been around for a while and it has been discussed before. There are examples floating around. Will need to check to find one.
As for your question regarding using the reference method which you tried to employ in your initial approach, that's simply not going to gain you anything. You will still be creating buffers when you try to access the cluster elements. But you already have this information in the array inside the outer for loop, so you're just creating unnecessary extra programming for yourself.

Drag And Drop Element Of Array Of Clusters

I have a project that includes an array of "tests", each of which is a cluster containing an array of "part numbers", a regular expression matching string and an array of "test tasks" (each of which, is in turn, a cluster of elements).
That is:
Tests (array of):
Cluster:
Part Numbers (array of strings)
Regex (string)
Tasks (array of):
Cluster:
Task type
Base Channel,
Measurement Channel
Other Channels
I'd like to be able to drag and drop to re-order the task array within an individual test. (It's a nice-to-have rather than an urgent request - more for my own learning than anything). For now, I've implemented "Move Up" and "Move Down" buttons.
The examples are fine for a single cluster that includes an array, or for an array of objects. As soon as we have an array of clusters, it's hard to access the individual elements within a specific cluster.
Has anybody successfully implemented drag and drop within such a setup?
Curiously,
Geoff
Geoff Field, BE, CLAD, MIEAust
Professional geek, amateur stage-levelling gauge
Solved!
Go to Solution.

Hello GeoffF,
This is definitely doable, and you can even use the standard start drag and drop methods/events, the tricky part is determining the array elements that are being selected on mouse up/mouse down and handling the swap manually. Luckily, there are a couple decent examples of how to do this out there already, I'd suggest you take a look at this one:
Community Example: Determine Clicked Array Element Index in LabVIEW
https://decibel.ni.com/content/docs/DOC-22434
That should give you the selected array indices, and then all you have to do is switch the elements around around in the drop event. I've attached a very basic demonstrative example that uses that code I just linked (you'll need to download that as well) and the events mentioned to swap two array elements. The attached code is just thrown together, you'll want to design something more robust and scalable for any sort of real use.
Regards,
Tom L.
Attachments:
array drag.vi ‏21 KB

Access Array Elements by Arrays Reference

Hi there,
I'm currently working on a vi that writes clusters as recordsets into
specific tables in a database.
Due to this I have a problem filling an array of clusters equal to the
recordset structure of
a table. I wonder if it might be possible to access each element of an
array by using the arrays
reference instead of a local variable. At the moment I couldn't find any
properly working method for
that. Is anybody able to giv me some advice or hint?
Thanks a lot!
Sebastian Dau

Sebastian; Be careful about thinking that you have solved your problem because a technique works--or appears to work. The method you are talking about uses excessive resources, is slow and inefficient and is an open source for race conditions. Right now the thing seems to work, what happens when you have other code executing at the same time, accessing the same data? Or say you install the code on a computer that's faster--or slower--than the one you're using now. Will it still work? If not will you be able to figure out why it suddenly stops working? Or why it only seems to work on certain computers? In terms of performance, you always have to go for the best performance you can because you never know how you will want to use the code in
the future. In other words, you use this VI in one place and you can't notice the performance difference. But what happens when you use this VI in a 100 places in your code? Will the performance loss still be unnoticeable? Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

How can I modify the cluster values in an array of clusters?

Hi all - I can't believe that I am having trouble with this but for some reason I am completely wrapped around the axel with it. I have an array of clusters, they are all strings but with different names. I am using key configuration VIs to setup a readable text file for the user. I also want the user to be able to load up the array of clusters with the values that are in the text file. So I am reading the keys and trying to populate the array of clusters to show what is in the text file and then run the test using those values. However I am not able to get the clusters populated correctly. Does any one have an example of what I am trying to do? Basically I am trying to populate an existing array of clusters with new values. That is what it comes down to. Thanks in advance for any help.

Go to jki and dowload VIPM (VI Package Maager). From there you ca install OpenG. Lot's of useful stuff.
Also if you cosider XML to be readable you can use flatten to/from XML.
=====================
LabVIEW 2012

Using Event Structures with Array of Clusters

Using LabVIEW 8.5
Hi all,
I'm trying to convert an existing application to one that can be used
through a touch screen. I updated the UI and added an event structure
to listen for mouse ups on controls that require a HMI keyboard or
numpad to show up. Although I've been programming for a while, I'm new
to LabVIEW and am struggling with a problem:
Is there any way to have an event case listen to an event within
arrays? I've seen a few examples on the forums, but they all start with
breaking up the arrays into individual variables. Using the variables,
they build arrays. This seems pretty tedious, and I'm pretty sure I
can't apply it to one of my arrays. Essentially, I just want to know
which cluster in which array the user has clicked on, so I can open the
HMI keyboard or numpad and send the text to that cluster. In my watered down app (Array of Clusters.vi), I've put 3 arrays of clusters and a few stand-alone controls to give you guys an idea of what I'm taking about.
BTW, I'm using the HMI Keyboard and Numpad built by the Beta Community (http://decibel.ni.com/content/docs/DOC-1062) and modified it to add a "Clear" button to the keyboard and numpad. Please let me know if I implemented this in the best way.
Thanks for the help,
Kunal
Message Edited by bhatiak on 08-04-2008 03:55 PM
Attachments:
Array of Clusters4.llb ‏274 KB

My old tic tac toe example shows how to determine which square of a 2D array has been clicked.
http://forums.ni.com/ni/board/message?board.id=170&view=by_date_ascending&message.id=247044#M247044
You probably can adapt some of it for the arrays on the right. If the array can be scrolled, you also need to account for the "indexvals" offset.
The Layers controls is easiest, because you only show one element. Just read the "index vals" property to get the array element and parse the coordinates to get the cluster element.
btw: the small while loop on the right serves no purpose at all and acts just as a CPU burner. You can delete it without any change in functionality. Is there anything else to it?
LabVIEW Champion . Do more with less code and in less time .

How can i segregate an array of clusters with channels id in the cluster

Hi All
i am using a keithley 2010 DMM for power measurements,
i am using the 2010 scan read VI which gives the reading output as an array of clusters, these clusters contain the measurement,units,channel.
i have 6 channels for measuring voltage across and i want to make 5 readings per second on each channel which makes upto 30 readings per second.
i want to segregate these clusters from the array according to the channel id and take the results,
please tell me if we have function for this or you have any possible solution for the same.
i would be very happy to hear from you and get this solved
please help
Thanks in advance
Sandeep K Shyam

yeah this looks great...thanks for your response,
i have modified accordingly and attaching the VI, can you please look into this once
also one more problem i have with this VI is whenever i am trying to run the VI, the sub VI (Scan config.vi) gets popped up and waits for user response (next) cntrl+right arrow, how can i get rid of this and run the VI in continues mode?
i am attaching my VI along with the kei2010 lib,
please check this
Thanks again
sandeep K shyam
Attachments:
sandeep-FinalKeithley20101.vi ‏822 KB
kei2010.llb ‏901 KB

Control mouseover image does not display when contained in an array of clusters.

I have been using system booleans (with some customization) for the ability to impement mouseover animations. For example (default system booleans):
The mouseover feedback works well with my UI, and for the most part everything is going great.
However, the mouseover image does not load if the the boolean is contained within an array of clusters (a single cluster with the boolean inside or an array of booleans works as expected):
The mouseover animation does work for a single array element in the above case (the one which was most recently clicked), but this behavior isn't desirable and it seems buggy if I were to leave this on my UI as it is.
So I guess I'm just wondering if anybody has encountered this or has any suggested workarounds? The few that I've thought of so far (maintain a separate array for any set of system boolean controls, check coordinates myself on mouse move event and try to update the proper element in the array, avoid using mouseover animations entirely for this set of controls) aren't all that desirable. Even though this issue could be considered cosmetic, the UI is very important to me as this code is something shipped to customers.
This is LV 2011 by the way, so if by some chance the behavior in 2012 is correct please let me know (this alone might be reason enough to convert the project up). If there is a CAR ID for this behavior and an NI employee wishes to share it I would also appreciate that.
Best Regards,
John Passiak
Solved!
Go to Solution.

Hey Jason,
A reproducing VI would be any VI that contains an array of clusters with a system control boolean inside. Here's an example:
Single Boolean, Single Cluster, and Array of Booleans all show the proper mouseover image.
Array of Clusters always shows the mouseover effect on the last element which was clicked, but does not show the mouseover effect on other array elements (actually, it seems to be inconsistent--every now and then it does show the mouseover effect on other array elements but it is not at all reliable).
Best Regards,
John Passiak
Attachments:
MouseoverTester.vi ‏9 KB

Array of Clusters Counters / Shift registers

Hello All,
In my Array of Clusters, I'm having trouble controlling my MISS PACKET indicator. Each time a packet is missed , the MISS PACKET indicator increments by 1. My problems is, that the same number of miss packets is showing up in the MISS PACKET indicator in each array index if a packet is missed. Ex. So if index[0] has missed 30 packets, whenever index[1] misses a packet it will display 31 and not 1. I'm using a shift register to keep a count of the number of missed packets. I believe the shift register is the issue because the previous value is store whenever a packet is missed.
Any help would be appreciate !
Thanks
Attachments:
Final-Demo - 3.vi ‏52 KB

The first time i tried using a shift register I had the initalization done outside of the while loop and still got the same results
Attachments:
Final-Demo - 3.vi ‏47 KB

Array of clusters TAB next element

I have an array of clusters and I want with the TAB key, when I am at the last element of the cluster i, move to the first element of the cluster i+1.
Jean-Marc
Jean-Marc
LV2009 and LV2013
Free PDF Report with iTextSharp
Attachments:
Array of clusters.jpg ‏132 KB

Thanks for they answers.
My problem is the triple TAB (TAB -TAB -TAB) to change the array line i to i+1.
Click on an element in the array and move with the TAB key. When you are at the element "VOC":
- the first TAB (event "<VOC>:Key Down?" ) generate CTRL +UP (return to tabbing among front panel controls -return to CLUSTER at line i);
- the second TAB (event "<Cluster>:Key Down?" - sequence through the array- move to the array line i to line i+1)
- the third TAB (event "<Cluster>:Key Down?" )generate CTRL + DOWN ( move the key focus inside the array or cluster -move inside the cluster at the line 1+1);
I try to reduce the number of TAB.
Jean-Marc
"Complete the following steps to
use the <Tab> key to move through elements within a single array
or cluster when you run a VI.
Display the front panel. While the VI is running, press the <Tab> key until the array or cluster is highlighted.
Press the <Ctrl> key and the down arrow key to move the key focus inside the array or cluster. (Mac OS) Press the <Command> key. (Linux) Press the <Alt> key.
Press the <Tab> key to sequence through the array or cluster elements and the array indexes.
To return to tabbing among front panel controls, press the <Ctrl> key and the up arrow key. (Mac OS) Press the <Command> key. (Linux) Press the <Alt> key."
Jean-Marc
LV2009 and LV2013
Free PDF Report with iTextSharp
Attachments:
Tab Array Clusters LV8_0.vi ‏94 KB

Array of clusters and in the cluster is a bar meter, how can I change the color individually?

Array of clusters and in the cluster is a bar meter, how can I change the color of the bar meter individually for each element of the array? I have just figured out that you can't change properties of one element of the array without all elements changing. For the scaling I had to make numeric indicators for each tick of the scale so that each bar meter in the clustered array would have individual scales. I also had to do some math to scale each barmeter to display correct proportions from 0 to 100%. Now I'm stumped on the color of the bar meter. Basically, if the value goes over a setpoint, the bar meter needs to turn red. It has to be in an array to be infinitely scalable.
Thanks
Matt
Solved!
Go to Solution.

You can't do that-
without a little trick.
You could consider laying a custom color box over the bar graph in the cluster you can set the color based on the value of the bar graph or even make a "Pseudo"- bar graph using a series of color boxes stacked to look lie a bar and changing values of the Color boxs from empty to full to red.
Here is an example to demonstrate
Jeff
Attachments:
Pseudo bar.vi ‏12 KB

Accessing array of clusters

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