RE: Wanted: #define

2004-06-17 Thread Scott Hannahs
At 9:05 -0500 6/17/04, [EMAIL PROTECTED] wrote: >Regarding the cluster of constant values from which you can select one >using an implicit unbundle: >Is it easier to drop one constant [from the palette or file system] and >then select which subpiece to use than it is to just select which constant >

RE: Info-LabVIEW Digest - 06/16/04

2004-06-16 Thread Scott Hannahs
At 8:04 -0400 6/16/04, Hysell Shannon wrote: >If anyone saves their previous posts- can someone forward me the various posts >regarding the RTOS using a PC?? I deleted them and now I have a thought! You can search for any previous posting at Brian Renken's EXCELLENT search engine.

Re: Virtual memory

2004-06-16 Thread Scott Hannahs
At 9:46 +0200 6/16/04, Uwe Frenz wrote: >Ann, >you asked on Tue, 15 Jun 2004 15:27:05 -0400: > >>I get this message sometimes when I run my program: System is low on >>virtual memory >If it is just a rare state it may well be worth just to increase the systems virtual >memory. This can be do

Re: Wanted: #define

2004-06-15 Thread Scott Hannahs
At 16:23 -0400 06/15/2004, George Gatling (Contractor) wrote: >From my days as a C programmer (shudder) I have to say I do miss the #define. I >realize LabVIEW cannot really have an exactly analogous feature because the scope of >.vi is too different from the scope of .c, but there must be some

New solution for OS X

2004-06-11 Thread Scott Hannahs
Just to publicize a little known solution that lets one use the best development environment with NI hardware. One can use a cheap PC as the host for all the hardware running the PharLap RT/OS as the target machine. This gets around the extreme cost of a PXI crate and embedded hardware. http

Re: webcam

2004-06-10 Thread Scott Hannahs
At 11:31 +0200 5/27/04, Rolf Kalbermatter wrote: >"Scott Hannahs" <[EMAIL PROTECTED]> wrote: > >>Actually, I just wrote one using one of the examples Christophe Salzmann's >>quicktime interface. Works like a dream!!! Cross platform and handles all

Re: Video surveillance

2004-06-08 Thread Scott Hannahs
Note: By specifying a "key" frame at the beginning of each part's handling you can modularize the data. This means that a whole key frame is stored and then just differences for each successive frame. This is what leads the the better compression of video such as MPEG4. But note, you want alm

PCI-GPIB cards - arrgh...

2004-06-08 Thread Scott Hannahs
If you aren't into gory technical details, skip this message. NI has 4 GPIB cards: Looking at the NI web pages there are 4 distinct, PCI-GPIB interfaces. #1 PCI-GPIB for windows 95/NT/200/XP/Me/98/Solaris http://sine.ni.com/apps/we/nioc.vp?cid=5310&lang=US #2 PCI-GPIB+ http://sine.ni.com/apps/

Re: LV7.1 for Linux

2004-06-07 Thread Scott Hannahs
At 9:57 +0100 6/7/04, Craig Graham wrote: >Why on earth is the "timed while loop" not in the Linux version? Because it is a windows only function and is only in the winders and pharlap RT versions of LV. -Scott

RE: Recursive Code Challenge

2004-06-04 Thread Scott Hannahs
At 12:31 -0700 6/4/04, ALTENBACH,CHRISTIAN wrote: Quoting Scott Hannahs <[EMAIL PROTECTED] > It makes an interesting story but is not the best >way to approach the problem. > >'glad you brought up your recursive demo. I compared it with my entry in the >recent LabVIEW Zo

Re: Asyncrhonous Serial VISA

2004-06-04 Thread Scott Hannahs
Title: Re: Asyncrhonous Serial VISA The VISA library AFAIK does not allow simultaneous input and output on a single port.  The difference between asynchronous and synchronous behavior is getting a bit blurred. Asynchronous calls to the VISA library mean that the execution for that execution engi

Re: maths problem

2004-06-04 Thread Scott Hannahs
At 8:07 -0700 6/4/04, PJ M wrote: >If I understand properly you know %co2 and you want to >know x right ? >Therefore you just have to solve the equation. It's a >pure math problem, no a LV one. >Let's rename your equation >%CO2=(((3.10933*(X*X))+(.5602*X)))/(0.30204-X) like so >y=(ax*x+bx)/(c-x) ><

RE: Recursive Code Challenge

2004-06-04 Thread Scott Hannahs
At 12:24 -0400 6/4/04, Junginger, Johann wrote: >This is going to be a naïve question after this thread has been going on for >so long, but can anyone send me (or point me to) a LV7 (or earlier) example >of recursion? It sounds very interesting but I am having trouble wrapping my >head around this

Re: Recursive Code Challenge

2004-06-03 Thread Scott Hannahs
At 12:15 -0400 6/3/04, Michael C. Ashe wrote: >Code Challenge: >But I think that it will soon be possible to do exactly what you say above, >grab a VI's own icon, drag and drop, and (if you have a switch or two set >and some LabVIEW scripting in place) have the VI replaced on the diagram >with a su

Re: Write Hexadecimal values as ASCII characters

2004-06-03 Thread Scott Hannahs
At 10:01 -0400 6/3/04, [EMAIL PROTECTED] wrote: >Folks, >How does one write a hexadecimal string as ASCII characters on to a file? "format into string" with a %X format (the create format string pop up will help you). other possiblities are %x, %0X, and %0x depending if you want leading radix ind

Re: Thermocouple to Pt100

2004-06-03 Thread Scott Hannahs
At 10:32 -0400 6/3/04, John Brohan wrote: >Hello > >I have a device which has a PT-100 temperature sensor. The probe of this is >too thick for what I need. I want to measure the temperature of liquid in a >test tube while I'm adding some reagent. It seems that the PT-100 is a >device with some size

Re: Maybe off topic - freeware and commercial ad

2004-06-02 Thread Scott Hannahs
At 17:50 -0700 6/1/04, Irene He wrote: >If I understand correctly there is no discussion about >open source allowed in this list, correct? What other >topics are taboos? For the record: There is no list of topics that are "taboo". There may be encouragement from myself OR others that a topic is

Re: LV Wishlist

2004-05-27 Thread Scott Hannahs
At 22:15 -0500 5/26/04, Greg McKaskle wrote: >Actually, the NI wishlist still exists, and while you can post them as >many places as you like, keep in mind that NI's site is more likely to >get into the feature list. > >URL is >http://sine.ni.com/apps/we/niup.ni?ap=psclogin&lang=us&du=http://digita

Re: webcam

2004-05-26 Thread Scott Hannahs
>Just wonder how many cameras have quicktime driver. Could you please list >some of those cameras for example? Sure! Any IIDC(I think that is the spec) compliant firewire video camera and probably a lot of other firewire cameras as well. And other such cameras. From Chris: >It works well with

Re: webcam

2004-05-26 Thread Scott Hannahs
At 4:12 -0700 5/26/04, Hamid Shojai wrote: >Hello, > >I want to work with webcam in labview. form which point should I start? Actually, I just wrote one using one of the examples Christophe Salzmann's quicktime interface. Works like a dream!!! Cross platform and handles all camera's that have a

Re: DAQmx, etc.

2004-05-25 Thread Scott Hannahs
At 7:25 -0500 5/25/04, Geoffrey Schmit wrote: >For example, I'm >not sure what you mean by a "LV style" wait. I'm not aware of a >construct that would allow a thread to wait on a synchronization >primitive and yet continue to execute. That is, a thread is either >running or waiting. If my defini

RE: Slow Printing

2004-05-20 Thread Scott Hannahs
At 10:03 -0400 5/20/04, Dan Press wrote: >Printing takes time, and it wants to run in the UI thread. >Now go upgrade to LabVIEW 7.1 and XP Pro. 1999 called; they want their >software back. :) Then upgrade to a true multi-threaded system. You know the one, that one based on a multi-threaded, sy

Re: LV2 style globals, events. Was Re: DAQmx, etc.

2004-05-19 Thread Scott Hannahs
At 6:04 -0600 5/19/04, David A. Moore wrote: >>At 10:24 -0700 5/18/04, tim wen wrote: >>>another question: i've been using LV2 style globals to pass data between parallel >>>loops >>>and am wondering if a queue is a better way to go? > >>"Scott

Re: DAQmx, etc.

2004-05-19 Thread Scott Hannahs
At 7:58 -0500 5/19/04, [EMAIL PROTECTED] wrote: >If the task acquires a finite number of samples and you set this input to > -1, the VI waits for the task to acquire all requested samples, then reads > those samples. Is this a blocking wait like the non-DAQmx call into a CIN (or LLB) or is it a "

Re: DAQmx, etc.

2004-05-18 Thread Scott Hannahs
At 10:24 -0700 5/18/04, tim wen wrote: >In LV6 the 'AI read.vi' hogs the CPU waiting for the number of samples requested to >be available. >someone (sorry for not remembering the name) came up with a 'non-blocking AI read.vi' >which i have >been using happily. >i noticed the new DAQmx 'cont&graph

Re: Dealing with large file

2004-05-17 Thread Scott Hannahs
At 13:45 -0400 5/17/04, [EMAIL PROTECTED] wrote: >I want to tell excel from LabView to open or import large data file. The >data doesn't fit on a single excel worksheet (65500 rows). I really suggest dumping Excel. As the notable Gary Johnson defined it, "Excel is a word processor that calcula

Re: 9-bit serial with VISA, LV7.1

2004-05-10 Thread Scott Hannahs
t NI to support 9 bit transmissions in VISA and do the parity in software -Scott -- Dr. Scott Hannahs, Head of User Research Instrumentation http://sthmac.magnet.fsu.edu National High Magnetic Field Laboratory, Florida State University 1800 E. Paul Dirac Dr

Re: Labview 7.1 released 5/4/2004

2004-05-06 Thread Scott Hannahs
At 9:44 -0700 5/6/04, andrew johnson wrote: >Is there yet a list of labview bug fixes that 7.1 incorporates? AFAIK, it is NI policy NOT to distribute a list of bug fixes. I have been variously informed this either for competitive reasons or it avoids confusing the users. Standard disclaimer, if

Re: Visual source safe - followup question

2004-05-06 Thread Scott Hannahs
At 7:19 +0100 5/6/04, Craig Graham wrote: >Hmm. This message was posted some days ago and has only just appeared. List >problems? No. Problems with sender. I am replying privately with details -Scott

Labview 7.1 released 5/4/2004

2004-05-04 Thread Scott Hannahs
List of features at: http://www.ni.com/labview/upgrade.htm

IMPORTANT ADMINISTRATIVE NOTE - LIST CHANGES

2004-04-20 Thread Scott Hannahs
AIL PROTECTED]> http://www.info-labview.org/ and Scott Hannahs - Dr. Scott Hannahs, Head of User Research Instrumentation - - http://sthmac.magnet.fsu.edu - - National High Magnetic Field Laboratory, Florida

Re: source code for 2d cross-correlation fx?

2004-04-15 Thread Scott Hannahs
At 11:11 AM -0400 4/15/04, Don J Roth wrote: >I know this is a long shot but does anyone have the c or c++ code to compute the 2d >(image) cross-correlation fx? (I know that IMAQ VISION has the cross-correlation >routine but I am looking to potentially modify the 2d correlation routine to compute

List Move Postponed.....

2004-04-14 Thread Scott Hannahs
Due to other duties (ie day jobs), the list move has been postponed until next Monday (4/19/2004). This has the added benefit that any problems can merely be chalked up to the "Monday Effect"! -Scott

IMPORTANT ADMINISTRATIVE NOTE - LIST CHANGES

2004-04-13 Thread Scott Hannahs
igest version of info-labview, send an email to: [EMAIL PROTECTED] To unsubscribe to info-labview, send an email to [EMAIL PROTECTED] To contact me (the list manager) send email to [EMAIL PROTECTED] (NOTE: the slightly different domain for this address!!) Scott Hannahs - Dr.

Re: Setting control default value

2004-04-09 Thread Scott Hannahs
Depending on how much trouble you want to go to... You can make it a dynamically loaded VI in the built exe. Then when you need to set its default value. Since it isn't running, then set the value, make it a default then save the VI back into the llb. Then when you need the value, just call th

Re: Setting control default value

2004-04-08 Thread Scott Hannahs
At 11:12 PM +0200 4/8/04, Christophe Salzmann wrote: >Does anyone know how to set programmatically (via the VI server) the default >value of a control, this when the VI is running? That is one of those things that can't really be done since it actually is an editing operation. This means that th

Re: Recommendation for USB to Serial Port converters

2004-04-08 Thread Scott Hannahs
At 11:33 AM +1200 4/8/04, Tim Streeter wrote: >I have been using cheap USB to serial converters, made by 'Planet', and >they have an annoying feature/bug of the same device getting alocated a >new port number if pluged into a differend USB port. This is not much of >a problem if only 1 usb to seria

Re: Upgrade from Full to Base version

2004-04-08 Thread Scott Hannahs
At 11:38 AM -0400 4/6/04, Stéphane Caron wrote: >I'm using LabVIEW 6.1 Full version and I want to upgrade to LabVIEW 7 base version (I >have some reasons to do that :-) ). I don't use any feature specific to the full >version vs base version. >Is it possible to make that kind of upgrade, will the

RE: API Serial Functions

2004-04-08 Thread Scott Hannahs
At 1:17 PM -0400 4/6/04, Michael Aivaliotis wrote: >Ok, I guess a definition is required for the term "VISA" because I think we are on >different wavelengths. When I speak of VISA, I >mean any call (from LabVIEW) of the "VISA Read" and "VISA Write" functions. That is my definition as well. But to

Re: Request for suggestions on structuring!

2004-04-08 Thread Scott Hannahs
ask to "re-do?" in a dialog box or make other test and decide to exit the loop. Store the file and return to the main event loop. For the stop button change event case send the new value of the stop button to the main while loop to terminate. -Scott -- - Dr. Sco

RE: OpenG Coding Challenge - Remove Backspace

2004-03-30 Thread Scott Hannahs
>I think I have those covered. I don't know enough to shorten my time >anymore. I look forward to seeing the other VIs. I have no ideas how to >make it any cleaner. It will be some work, but something like the evaluation done by NI on the different submissions. My vote is evaluation for not o

Re: OpenG Coding Challenge - Remove Backspace

2004-03-30 Thread Scott Hannahs
At 7:45 AM -0800 3/29/04, Jim Kring wrote: >Here is the problem description that I put up on the challenge page. >When you are typing at a terminal (telnet for example) and you press the backspace >key, a "\b" (0x08) character is sent via TCP-IP. The server that is parsing the text >must interpre

[M] PCI-GPIB driver NEW VERSION for Mac OS X 10.3

2004-03-30 Thread Scott Hannahs
I apologize for the cross posting, but I have gotten messages from all these groups! There is a new version of the PCI-GPIB driver for Mac OS X. Due to people asking, I have recompiled the driver for Mac OS X and corrected some problems so it now runs under Panther. This has minimal testing s

Re: API Serial Functions

2004-03-30 Thread Scott Hannahs
Yes, and I have updated them and they are available . The gotcha is that they use traditional serial port calls and since LV 7.0 those calls are now routed thru VISA. There is also a native VISA version that is much more robust and simpler. It is a great

RE: Alternative info-LabVIEW list (NOT!)

2004-03-30 Thread Scott Hannahs
At 2:04 PM -0500 3/22/04, Bookwalter, Dan wrote: > >I would like to see Info-LabVIEW on a news (NNTP) server. > >I sure hope this doesn't happen... I have tried and tried to get our IT guys >to open up NNTP for me. They simply won't do it... I am sure there are many >others in the same situation...

Re: Let's have election!It is fun:)

2004-03-22 Thread Scott Hannahs
At 2:51 PM -0500 3/17/04, [EMAIL PROTECTED] wrote: >Let's have election! Primary?? It is fun:) > I'm from Florida, so I'll count the votes! Kathy Harris taught me how to do it! -Scott

RE: Alternative info-LabVIEW list

2004-03-22 Thread Scott Hannahs
Ok, I will be public about this. I have offered to take over at least two of Tom's lists and host them here at the lab using the same software that he uses to host them. If Michael wants to do this that is fine, since I also use the Igor list I figured that I could do this with the least disru

Re: Decimal String to Number with DBL Default

2004-03-21 Thread Scott Hannahs
At 11:36 AM -0500 3/18/04, Paul F. Sullivan wrote: >LabVIEWers, > >If I use "Decimal String to Number" with an I32 zero as the default, convert "To >Double Precision Float", and then "Divide" by 1000, everything works fine for >positive and negative numbers. > >To save the conversion, I tried usi

Re: Let's have election!It is fun:)

2004-03-21 Thread Scott Hannahs
at because it >requires very >little bandwidth. So, i think if a change to the behaviour is required, we can take a >poll and let >the members decide. Like I said, the capability is there and we can switch this on in >the future if >necessary. For now, the primary goal is to get t

Re: Let's have election!It is fun:)

2004-03-21 Thread Scott Hannahs
At 7:39 PM -0500 3/17/04, Scott Hannahs wrote: >At 2:51 PM -0500 3/17/04, [EMAIL PROTECTED] wrote: >>Let's have election! Primary?? It is fun:) >> > >I'm from Florida, so I'll count the votes! Kathy Harris taught me how to do it! Just to keep everyone informed

Re: MAC driver for PCI-MIO

2004-03-21 Thread Scott Hannahs
At 9:08 AM +0100 3/17/04, [EMAIL PROTECTED] wrote: >Is there anybody who has written a driver for MAC OSX10.2 for the >following cards >PCI-MIO-16XE-50 and DIO 96 See the part about RLP (register level programming) on The DDK has examples to

RE: API Serial Functions

2004-03-10 Thread Scott Hannahs
At 10:31 AM -0600 3/10/04, [EMAIL PROTECTED] wrote: >I just wanted to let you know that starting with LabVIEW 7.0, NI-VISA for >Serial only is now included when you have LabVIEW PDS build the application >and installer distribution. That's less than 400 KB of VISA files on the >target system and d

RE: API Serial Functions

2004-03-10 Thread Scott Hannahs
At 7:31 PM -0800 3/8/04, C. Allen Weekley wrote: >Yes. My company manufactures a variety of instruments that communicate >solely with serial. We have been using NI-VISA and are happy with it, >but NI-VISA requires an installation that is often larger than the >application we supply to our custome

Re: API Serial Functions

2004-03-08 Thread Scott Hannahs
At 4:27 PM -0800 3/8/04, C. Allen Weekley wrote: >Has anyone written VI's to perform serial I/O using functions in >kernel32.dll? Allen, Why re-invent the wheel? Actually the people who did this are the people who wrote the VISA library. Any reason not to use their work? -Scott

Re: Application restarting

2004-03-02 Thread Scott Hannahs
At 4:25 PM + 3/2/04, Craig Graham wrote: >From: <[EMAIL PROTECTED]> > > I have a Labview application which is meant for test and measurement >> application to test some the units in production, > > Randomly this application is restarting the system ( running on Win98SE OS >Ditch that for a sta

Re: [A] Infinite continuous logging of 16 TV (A+V) channels

2004-03-01 Thread Scott Hannahs
That was my first response as well. But then again there are applications that could consume 2.4 Tb/day and it becomes an interesting problem (rather than preserving Fox news for posterity!). Compression/Compression/Compression! MPEG-4 can maybe give you a factor of 24 if you turn the key fr

Re: Hiding Main VI's Window in built application

2004-03-01 Thread Scott Hannahs
Because in A, once you close the front panel there is no reference to the VI, unless it has opened its own reference. At 1:38 PM +0200 3/1/04, Yonatan Tidhar wrote: > >From my experience (6.1) >At the top level VI: >A) if I use property node FP.Open and wired False Value to it and the reference i

Re: Hiding Main VI's Window in built application

2004-02-23 Thread Scott Hannahs
At 11:41 +0200 02/23/2004, E. Blasberg wrote: >A colleague wants to build an application where a Password dialog appears and only if >the correct password is entered would the main VI appear. > >1) Launch Password which then uses VI server to launch Main VI >2) Embed the password VI in the Main VI

Re: Problem withWaveform Chart

2004-02-19 Thread Scott Hannahs
At 17:56 -0500 02/18/2004, Scott Hannahs wrote: >An example can be downloaded at: ><http://sthmac.magnet.fsu.edu/downloads/labview/bugs70/ChartSpeedTest.vi> And if anyone tried the example, it is now fixed and truly a LV 7.0 file! Sorry about that. If someone wants to try it under

Re: Reading file names from a directory

2004-02-19 Thread Scott Hannahs
a directory listing VI examination utility at <http://sthmac.magnet.fsu.edu/labview/vi_library.html> (that is not truly recursive either, but I will redo it someday). -Scott -- - Dr. Scott Hannahs, Head of User Research Instrumentation - - http://sthmac

Problem withWaveform Chart

2004-02-18 Thread Scott Hannahs
I have notice an unusual speed problem in using a wave-form chart control. I have a chart with several plots on it and a lot of data. As soon as the chart fills speed goes south and CPU usage skyrockets. However if I make the history buffer 1 larger than the x scale displayed everything works fa

Bugs, reprise (or one more obscure quote!)

2004-02-18 Thread Scott Hannahs
"The selfish spirit of commerce ... knows no country, and feels no passion or principle but that of gain." -Thomas Jefferson (1743-1826)

Re: BUGs

2004-02-18 Thread Scott Hannahs
At 23:15 -0600 02/16/2004, Greg McKaskle wrote: >Of course this is one of those >topics that is difficult to discuss in writing, so please don't use your >whiney voice when reading it. I'm simply trying to give insight into >our process. This process is not unique. One can substitute any large s

Re: Converting integers to binary

2004-02-18 Thread Scott Hannahs
ary to text files? >I'd appreciate any suggestions anyone has on this. "array to spreadsheet file", function and give it a %b format string with a "," (comma) delimiter. Convert your array to U8 first so it is only 8 bit values. -Scott -- Dr. Scott Hanna

Re: Picture.

2004-02-18 Thread Scott Hannahs
At 20:49 -0300 02/16/2004, Daniel Alejandro Moyano wrote: >I would need to know if it is possible to remove the window case in the >picture.ctl. I mean, I would like to show a picture less window case. Color the boarder transparent. -Scott

Re: Serial comms

2004-02-18 Thread Scott Hannahs
At 01:31 -0500 02/14/2004, Mohana Yethiraj wrote: >On Feb 13, 2004, at 11:30 PM, Scott Hannahs wrote: > >>Many systems have a way of snooping on serial port communications. I can give you a >>good way for Mac OS X.. But I am going out on a limb and guess that isn

RE: other persons software (was: why I hate express vis.....)

2004-02-18 Thread Scott Hannahs
. Is that top down or bottom up, or inside out programming style? Well, as we say. The universe is winning. -Scott -- - Dr. Scott Hannahs, Head of User Research Instrumentation - - http://sthmac.magnet.fsu.edu - - National High Magn

Re: Serial comms

2004-02-18 Thread Scott Hannahs
At 17:48 + 02/13/2004, Craig Graham wrote: >It *shouldn't* need a terminator since you specify a byte count in the first >two bytes of the packet. Check sums should be OK since my checksum generator >is producing results consistent with their examples. The terminator has to >be worth a try thou

Re: Serial Port

2004-02-18 Thread Scott Hannahs
At 18:18 -0500 02/13/2004, Subramanian, Shankar, K wrote: >How different is it to configure and acquire data using serial port rather >than NIDAQ card. Could anyone help me out in this? A lot different. Now the problem is communication with a device rather than configuring a board. Whole differ

RE: Dual monitors for labview use

2004-02-13 Thread Scott Hannahs
At 10:34 -0600 02/13/2004, Scott Serlin wrote: >What is the difference in performance I could see between running two >separate pci cards, one pci card and one agp card, or one dual-monitor >card? Depends on what else you use the PCI bus for. It is slower performance for raw bit pushing than the

why I hate express vis.....

2004-02-13 Thread Scott Hannahs
This is obviously my grumpy morning. And I have even had my prescribed dosage of coffee... I have been working with some software from a major instrumentation manufacturer. It is one of those VIs that tries to do everything with multiple tabbed front panels and lots of user interface controls

What is the purpose of upgrading?

2004-02-13 Thread Scott Hannahs
ist610.html Item 2, http://sthmac.magnet.fsu.edu/labview/buglist70.html There are several others as well. (waveform chart drawing, etc). FYI: these have all been reported to NI thru normal channels as well as beta test versions. -Scott (beating the dead horse of software reliability) --

Re: Serial comms

2004-02-13 Thread Scott Hannahs
At 12:30 + 02/13/2004, Craig Graham wrote: >The next is in the other port settings. The manual specifies 1 start bit, 8 >data bits, 1 stop bit, no parity. The VISA serial stuff in Labview 7, which >I've only just started playing with, has properties for stop bits, data bits >and parity which I'

Dangers of pipes....

2004-02-12 Thread Scott Hannahs
Well I am not talking about skateboard competition here, but interprocess communication. I have found that the LV library manager will hang forever (not hang ten) when asked to list dates of files in a directory that contains a named pipe. This probably causes problems with other types of file

RE: 60MS/sec- is this possible?

2004-02-12 Thread Scott Hannahs
At 11:24 -0500 02/11/2004, Ross, Michael wrote: >I have been interested in this thread - it is pretty normal for people >(managers/clients) who don't actually use LV or DAQ to ask for something >that doesn't make complete sense. > >Do I risk irritating them by trying to make it make sense from the

Re: [W6.1] Minimizing Interchannel Delay

2004-02-11 Thread Scott Hannahs
At 12:57 +0100 02/11/2004, Roman Golubovski wrote: >I would like to be able to modify the InterchannelDelay (configurable) with >the "AI Config.vi". > >Specifically, I need as much "simultaneity" as possible within E cards' 16 >channels. You can specify the interchannel delay to be as small as the

Re: 60MS/sec- is this possible?

2004-02-10 Thread Scott Hannahs
If you cleverly store 60 MS/s as 8 bit binary files, you may get close to fast disk speed. If you convert them to single precision or anything else you well certainly have to get a raid and possibly multiple channels at that. Further this will impact the PCI bus and you better have good bandwid

Waveform VIs with LV 6.1

2004-02-10 Thread Scott Hannahs
I was just helping a colleague who was having a tremendous slowdown in a data acq system. It was continuously taking 34 channels at 2 kHz and buffering about 15 seconds of data. Not a tremendous amounts but it kept running out of data and after taking some data, LV itself would take 30 seconds

Re: tIMER

2004-02-05 Thread Scott Hannahs
At 15:43 + 02/05/2004, Nuno Lambuça wrote: >I know that the serial data in a parallel port is a loss of 7 databits, but >it was the cost :( Yikes. You really wanted to try to send serial data using one signal on a parallel port? I doubt that could be reliable at almost any baud rate! For a

Re: LV -> Igor

2004-02-05 Thread Scott Hannahs
At 18:05 -0500 01/07/2004, Daniel Flatin wrote: >>David Thomson wrote: >>A colleague of mine wants to write data from LabVIEW into files of Igor waves to >>analyze in Igor. I told him that I could find such conversion VI's, as I had used >>them years ago. > >You could also do this with AppleScrip

Re: tIMER

2004-02-05 Thread Scott Hannahs
At 12:05 + 02/05/2004, Nuno Lambuça wrote: >Hi, in LV7 I need a timers smaller than 1ms. My need is for implementing a >serial protocol. Using the parallel port I get a too fast dataflow, so I >need delays. Nuno, You can't do this using a normal desktop O/S. Period. You can't use the parallel

RE: [W6.1] RMS averaging with "FFT Spectrum (Mag-Phase).vi"

2004-02-04 Thread Scott Hannahs
The benefits are that you can see the signal change during the 120 second acquisition time. You could see a 200 hz signal oscillate back and forth for example. This is the approach taken by the JTFA (joint time frequency analysis) toolkit. They use gabor spectrograms that take gaussian window

Re: [W6.1] RMS averaging with "FFT Spectrum (Mag-Phase).vi"

2004-02-04 Thread Scott Hannahs
At 09:36 +0100 02/04/2004, Gerd Rech wrote: >What about this: >1. Cut the long waveform stream into a number of (overlapping) pieces. >2. Use the FFT vi for each piece, which will produce amplitudes and phases >for each frequency bin. >3. Average apmlitude and phase for each frequency bin separatel

Re: [W6.1] RMS averaging with "FFT Spectrum (Mag-Phase).vi"

2004-02-04 Thread Scott Hannahs
your signal. For overlapping FFTs phase slip will reduce the signal to zero after enough time. RMS averaging will average the magnitude. Very different. -Scott -- Dr. Scott Hannahs, Head of User Research Instrumentation http://sthmac.magnet.fsu.edu National Hi

RE: Labview 7 gotchas

2004-02-03 Thread Scott Hannahs
At 13:53 -0600 02/03/2004, Vic Blosser wrote: >It in the error log indicating that certain vi's from the user libraries, instrument >drivers and of course some of the labview vi's can not be saved in 6.1. It is a >fairly substantial list. Right, but all those should still exist as 6.1 files and

Re: Labview 7 gotchas

2004-02-03 Thread Scott Hannahs
At 12:52 -0600 02/03/2004, Vic Blosser wrote: >Missed steps, non-functioning portion of the application. Things will work in the >development environment but not after it's compiled. I tried saving as 6.1 but there >are too many errors. > > I'm seeing is code within loops not completely functi

Re: [W6.1] RMS averaging with "FFT Spectrum (Mag-Phase).vi"

2004-02-03 Thread Scott Hannahs
You are close to what a waveform analyzer does. It is not mathematically very clean, but it is useful for watching frequency evolution over time. But you need a time averaging buffer. For each of the 6 segments, do an FFT and get the Mag and phase. Have a buffer that is the same length as yo

Re: synchronize

2004-02-02 Thread Scott Hannahs
At 22:41 -0800 02/01/2004, Joe wrote: > I'm trying to read data packets from a sensor that > is connected through a serial port and is > configured to transfer data every 100ms. what is > the best way to synchronize the reading intervals? Set up a read to timeout after 200 ms if you know your term

Re: Subpanels in 7.0

2004-01-30 Thread Scott Hannahs
At 09:12 -0800 01/30/2004, PJ M wrote: >Another strange thing (to me) is why don't I *automatically* get a subpanel refnum >when I create a subpanel (instead of that "insert VI" method) ? >Also, because of that, whatch out for these tranparent supanel with no scrollbar (it >is so easy to get more

RE: Subpanels in 7.0

2004-01-30 Thread Scott Hannahs
At 10:36 -0700 01/30/2004, Jim West wrote: >You >are not allowed to insert a VI that is already running into a subpanel. >Our code uses a spawned process (VIT) that runs in the background with >the front panel hidden. There are several instances of these displays >active at the same time. Maybe I

Re: Subpanels in 7.0

2004-01-30 Thread Scott Hannahs
At 08:47 -0700 01/30/2004, Jim West wrote: >It is a mystery to me why the VI cannot be open or running. This >eliminates several useful scenarios. It also eliminates the confusion of having two different frontpanels active at the same time. The open one or the sub-panel one! They can be runnin

Re: Sending info to run a CGI script at a web site

2004-01-29 Thread Scott Hannahs
At 15:30 -0600 01/29/2004, Seifert, George wrote: >I need to send a web page a request to send data. Somehow I need to tell it to run a >CGI script along with the parameters needed for the script. I haven't found any >examples on how to do this. Can anyone point me to an example? Thanks. I have

Re: Communicating with a VI in a subpanel

2004-01-29 Thread Scott Hannahs
At 13:48 -0600 01/27/2004, Seifert, George wrote: >Sorry if this has been discussed before but my search has come up empty. Is there any >way to communicate with a VI that's been opened in a subpanel? For instance can the >subVI respond to a control in the main VI? I don't see how to pass the ref

Re: I Really Like Event Structures, But...

2004-01-29 Thread Scott Hannahs
At 22:41 -0500 01/28/2004, Cat wrote: >I have a front panel with 1024 square-light boolean indicators (8 clusters of 4 >clusters of 32 booleans, if that makes any sense). The purpose of this screen is to >visually alert the user if a sensor is overloaded. Each light represents one sensor. > Th

Re: I Really Like Event Structures, But...

2004-01-29 Thread Scott Hannahs
At 14:50 -0800 01/29/2004, Irene He wrote: >Ja, I know there is a property of tip-strip. But what >I really want to know is if there is a really lazy way >to generally assign the tip strips to each controls >without creating the references for each control >first, it feels like the same amount of w

Re: Off-topic : County Line BBQ

2004-01-26 Thread Scott Hannahs
At 11:47 -0500 01/26/2004, Jim Henry wrote: >All answers are here: >http://www.countyline.com/ Actually Good thing it is Monday and we aren't supposed to be coherent or on topic.

RE: Greg's Car

2004-01-26 Thread Scott Hannahs
At 11:27 -0500 01/26/2004, Coradeschi, Tom [AMSRD-AAR-AIS-E] wrote: >You probably went to the County Line. And yes, there is stuff other than >pork on the menu: Beef (it's what's for dinner tonight). > There was a crowd of us in that car! And we went to the Salt Lick. There was beef BBQ as wel

Re: FW: Replacing one instance of a VI versus many

2004-01-23 Thread Scott Hannahs
el.vi rename changedsub.vi to newsub.vi in the same directory as newsub.vi reopen toplevel.vi Bingo, it will pickup the changed subVI everywhere it used to call sub.vi. -Scott -- Dr. Scott Hannahs, Head of User Research Instrumentation http://sthmac.magnet.fsu.edu

RE: Implaceness (was: Array Wish list)

2004-01-22 Thread Scott Hannahs
From the options list there is an option called "showInplaceMenuItem". Set this to true in your .ini file. Then Launch the Labview application. Then try "Tools->Advanced->Show Buffer Allocations This will give you a pop up window a

RE: State machine diagram editor

2004-01-16 Thread Scott Hannahs
At 14:25 -0600 01/16/2004, Scott Serlin wrote: >I do not have any controls to access in my vi state machine. As an >example, I control a piece of equipment that labview turns on, gets some >measurements, logs those measurements to a database, and then shuts >down. I do not access any front panel

  1   2   >