Fetch forever PDM

Similar Questions

• Continues to go for multi channels problem

  I am trying to acquire data continuously from 8 channels, SMU-5105, and then save it to file with PDM. My program is based on the example Fetch forever.
  The problem here is that data recovery is not going. Only channel 0 data right, the others are all wrong.
  It has something to do with the timeout of the VI Fetch. If I change the time-out value a positive value, the data are ok, but I can't use all 8 channels with NumOfSamples to 1MS and sampling rate of 1 MHz. The error is 'data are overwritten and cannot be saved. "

  I joined the program so that you know what I mean.
  Hope you can help me out of this problem.

  OK, I found the solution. I reduce the number of samples per channel. 1 ms x 8 channels + fresh General is more than the amount of memory shipped, which is only 16MB.

  Thank you for helping me.

• Are there examples of niScope send software trigger edge

  This is the sub VI:

  

  In my case, PXI-5105 and 6368 are used for the acquisition of synchronization. Post_trig_event and pre_trig_event of data are needed to analyze what analog channel has abnormal evolution. The trig source is not unique, which include several analogue channels. I therefore prefer to use a software to process a lot of data to channel to find the abnormal change and then send a trig signal, which means a trig signal to the PFI or the PXI_Trig. I think that the noScope that send software Trigger Edge works. Can you give me an example of this subroutine VI?

  I've attached an example that uses a software trigger to trigger an acquisition.  The code shows how to use the "niScope Trigger.vi software Send."

  Description of your request, it looks like you want to acquire data continuously and perform a top treatment in LabVIEW to determine when send software trigger.  This can also be done, and I would recommend starting with one of our continuous streaming of examples, like "niScope EX Fetch Forever.vi", which can be found using the example Locator OR under material input and output > Modular Instruments > NOR-SCOPE > Acquisition continues

   

  
  I hope this helps!

  -Nathan

• 5154 digitizer for fpga data

  I am trying to stream as quickly as possible from the to a FlexRIO 7966 5154 digitizer.  From the example "NISCOPE fetch Forever" in LV2012, I can implement the acquisition on 5154 @ 40MS/s, 50 k of data I8 piece and the graphical indicator seems to keep well indefinitely.

  I tried then write data to an FPGA - FIFO target host, and it chokes.  With FIFO write the method inside the loop of 5154 fetch the 5154 ends in error because of the "overwhelming memory" (it fills its on-board memory until the HOST is reading).   With FIFO writing in a parallel consumer (queue conduit) loop, the queue overflows just because he can't write that as fast as the 5154 FIFO provides samples in the queue.   What Miss me?  The 5154 uses a PCI DMA bus (I think), so I think that if he could hold, the host to the FPGA PCIe bus must be capable.

  There is another factor, that I have not taken into account?   Sorry I can't provide the VI since the installation of the LV is on a PC not connected to the network.  Any advice or suggestions would be appreciated.

  Thank you

  Mark Taylor

  For future reference, I ended up resolving this by moving the implementation on the actual FPGA.   I had run in mode "on the development computer with i/o simulated" and no matter what I did with the start-up or sizing FIFO sequence, it just doesn't work.

  After compiling and running on the FPGA, all right.  Maybe it's the basic knowledge, in fact I remember somewhere in my travels reading that don't accurately represent timing problems when running to the old fashion, but LV FPGA has kind of us painted into a corner with the compromise of simulation/compilation.  They do not include Modelsim, which is the only tool that enables co-simulation do functional and verification of the timing set (we Questa, unfortunately) and independent VHDL simulation captures the interaction host with precision (and software processing/timing is impossible to quantify!).  In my situation, the only way to operate at speed is in the FPGA, but then I can't see all of the things that I need to see to debug... ARGH!

  Additional links and resources always will welcome (on debugging of FPGA LV and design in general).  I found a couple of things below, which was somewhat useful:

  "NEITHER powerful LabVIEW FPGA Developer's Guide"

  http://www.NI.com/Tutorial/14600/en/

  I found a link to an "FPGA Debug Reference Library": http://www.ni.com/example/31067/en/, but my installation does not seem to have this available.

  And it looks like 2013 may add functionality to help alleviate some of this via the node of the execution of office referred here to the 'Test and debug LabVIEW FPGA Code'

  http://www.NI.com/Tutorial/51862/en/

• 5152. multiple record acquisition forever

  Is it possible to do a multiple record acquisition on the 5152, which itself will be automatically retrigger forever?

  I have currently a multiple record acquisition implemented to acquire 256 records, but the external triggers (using the TRIG BNC of input) are so close together that the software cannot rearm the coverage in time for the next acquisition, and some triggers are missed.

  For example, we are capture 8000 samples to 2 MS/s, if every record is 4 ms in duration. The external trigger occurs at the beginning of all of the records, with a period of 4 ms, so I essentially continuous. Each 256 files (about once per second), the LabVIEW VI transfers data in memory, he wrote on the disk, it displays on the front panel, etc, then re - the scope for the next acquisition of weapons. It would be ideal that the scope can be configured for the immediate release of an another multiple record acquisition (preferably in hardware), so that it could acquire in parallel with LabVIEW treatment files and write data to the disk.

  Any thoughts on how I might accomplish this?

  Hi Schrockwell,

  There is no way to make a Multi-Multi Record Acquisition.

  What you want to do, the short answer is Yes - there is a way to introduce within the finished construction of the API OR-SCOPE, but you should make sure that

  1. you must enable more Records than available memory

  2. you must set the number of records in very huge.  Since this value is an Int32, theoretically, the more important you can set avalue of about 2.15 billion (2 ^ 31-1).   After that, you must stop and restart your acquisition.

  The total time that the acquisition will continue for is:

  = Total number of records [#] acquisition [s] Total time / Trigger rate [Hz]

  3. Finally, you should make sure that you can endure the flow in your PXI/PCI bus, and you have designed your code effectively to support this.

  Two important things I noticed is that you decide to display data on a chart, and you write on a disc.  View data in a graph will lead your program last much longer the complete loop iteration - instead, try rΘcupΦre without display data.  Secondly - if you write to a disc, you must use queuesto do.

  If you already do this, then the question of highest level, it's whether or not you are supplying data on your digitizer.  If so, you must work around this problem so that there is no backlog of data.  The extraction flow (data transferred in your program using the Fetch function) must be equal to your Flow of Acquisition:

  Acquisition flow [B/s]

  = Number of samples per registration type [Sa/REC/WAV] * rate [Hz] * resolution digitizer [bytes / his]

  (Since the 5152 is a 8-bit digitizer, the resolution of your digitizer is 1 b/sample).

  If you can compare your speed of recoveryand who then subtract the acquisition flowcalculation, then you should see a number (in B/s) which reflects the speed at which you are supplying data.  For an acquisition to keep forever, this number must be virtually zero.

  I hope this helps,

  -Andrew

• Lower cost of query sql... but more time to fetch the records...

  Hello
  I have a 'strange' with a db view situation facing costly.
  I tried to reduce the cost of the overview

  specifically for 223 records fetched{the cost from 149 reduced to 74,
  
                                                         the recursive calls from 796 reduced to 224,
  
                                                         the consistent gets from 311516 reduced to 310341,
  
                                                          the physical reads from 7 reduced to 0}
  
  but the amount of time needed to fetch the results is greater than the old version of the db view....{it may be the double...}
  
  Have you any idea about this...????
  
  
  
  Note: I have got fresh statistics...
  
           I use db 10g v.2
  
  
  
  
  
  Thanks,
  
  Sim 

  Try to trace the query and see what tkprofs shows you.
  ALTER session set events 10046 trace context name forever, level 12';
  Run the query
  "ALTER session set events ' trace 10046 name context off."

  Then, run tkprofs on the file path to see where the database devoted his time and effort. Do the same for the baseline query in a different session (so you will generate a different trace file).

  If that does not produce something useful, try to use
  "ALTER session set events ' trace 10053 name context forever."
  Run the query
  "ALTER session set events ' trace 10053 name context off."

  Then examine the trace file to see if you can learn anything.

  Given that you have given us something more to go, it's all the help I can give...

• My downloaded (from iTunes) and bought movie took forever to download and freezes all the time.  How can I stop this?

  My iTunes purchased movie took forever to download, and when I play it, it freezes constantly.  Help!

  Hi there awhitley58,

  If I understand you try to play a movie that you downloaded but it stops time return inconsistent. I would say first to start in safe mode to clear some system-level caches and perform a disk check and repair if necessary:

  Try safe mode if your Mac does not end commissioning

  If not do play correctly, and no other videos you have downloaded in the past are affected, I'd say delete the file and download it again. Thank you for using communities of Apple Support.

• Desire for keyboard shortcut or a single command to fetch mail from all accounts of global Inbox

  I'm just now creating TB 31.7.0 in Windows 7 64 bit. I want to use the global Inbox to fetch e-mail from all accounts and have set up such an account, call the [email protected]. I am aware that shift + F5 is supposed to fetch e-mail from all accounts, but this doesn't seem to work with [email protected]. In addition, Messages to > download all new Messages doesn't work for [email protected]. Instead, I have to get msgs > [email protected] and would likely need to do so separately for each additional account of global Inbox I want to check. Y at - it a command to call Check mail for all these accounts, or a keyboard shortcut, or I have to press to Get Messages and select each account in turn?

  Thank you

  I have problems in questions here.

  1 menuOutils (alt + T) > account settings > server settings > advanced and endure check this server when getting new messages is checked.

  2 thunderbird collects mail on andf startup on a based calendar that you specify during the race. the need to 'get mail' for all accounts is actually a rare necessity because of these two things.

• I download my e-mails from gmail to my computer using firefox and only downloads of firefox 3 at a time, not all of them, I. Takes forever.

  I download my e-mails from gmail to my computer using firefox and only downloads of firefox 3 at a time, not all of them, I. Takes forever.

  Sorry, I should have to say that I use Firefox Thunderbird. To automatically download my emails to gmail, but it downloads only 2 or 3 when I did about 50 per day. I have to click again and again. It is on a desktop computer, laptop computer, in fact. My office works very well. Thanks for any help.

• I OPTED ON promotions (and 2 others, the third won't let me her behind her window) and it will not shut - how can I disable it forever?

  You have an opt-out option.
  THIS disengagement option has an option to always.
  IT DOES NOT WORK.

  I have never chosen on the beast) (& * % ^ * & () * ^ tab which is located in the MIDDLE OF MY SCREEN, covering a THIRD of my screen (and 62 cm - it was during the slaughter!)) ... IN CASE OF FAILURE. (at least 4 times)
  I have a dout opts for always under the stupid tab on the side OF my screen... IN CASE OF FAILURE. (at least 8 times)
  I am unable to withdraw for always in the tab that appears at the bottom of my screen, as it appears from the opt-out options BEHIND the window I want to withdraw forever from the. (I call this EPIC fail).

  When I read a story on the line, I DO NOT WANT to STORE. If I'm shopping in the Amazon for a book, I will read this book. IT IS BORING to HAVE to CLOSE OUT WINDOWS EVERY TIME I RESEARCH for a NEW BOOK - consider that I search/buy about 15 books at a time - after checking maybe 50 opening on TOP of these tabs.

  I also want to get rid of her notes with the arrows green circle thingy that open pop-up windows up if I mouse over them. (there are 3 of them under this box, I type as I type, and pushing the mouse away widened at least 4 stupid windows pop up - which I blocked pop ups in the options... then WHY?)

  I realize this can not fixed on the spot, as it is going to require a real programmer to fix, but please, pass this up to or more than that CAN fix. I have used firefox since before patch 4 after it went live. I LOVED the old "you're F * d (etc." page you used to have that directly opposes internet Explorers page not found - and I actually had the time to read and had a terrible time stopping laughing (at work of all places) when I did it. I don't want to change browser, but these * features * do not Captivate me--especially since * features * should be optional, and turn them off should work.

  Thank you for your help and I hope you have a good day/evening and horribly painful is more people like me. < 3 x o

  Sometimes a problem with Firefox can be a result of malware installed on your computer, you may not be aware of. Check your modules is:

  • Tools > Add-ons, or
  • 

    > Modules

  Remove all the extensions that appear to be suspicious.

  I recommend that you try to scan with MalwareBytes or AdwCleaner

  • AdwCleaner (for more information, see this other AdwCleaner download page)
  • MalwareBytes' Anti-Malware

  More information can be found in the article troubleshooting Firefox problems caused by malware .

• Somehow configure Thunderbird to fetch mail from SSH?

  I would like to have Thunderbird fetch email from a file on a remote server mbox. As ssh://server/home/user/mbox or you can also mount the SSH directory and use a local path to mbox.

  My apologies, I missed to add a link, it's here.

  http://AskUbuntu.com/questions/301988/using-movemail-with-Thunderbird-on-Ubuntu

  There are instructions step by step in the article. Note that a Movemail account can retrieve the mail in the Unix mail-hold file. This requires an SMTP server that actually puts mail there.
  
  I really doubt that it works with an email client mbox file.

• How can I fix - there was a lot of recently updated on McAfee, virus protection takes forever to delete a message

  This happened once before after McAfee anti-virus has been installed. Someone suggested something unclicking, can't remember what it was now. He worked then. When I try to delete messages in Thunderbird, it takes forever and I get ' Mozilla does not. Can someone tell me how to solve this problem?
  Thank you
  Lorrelaine

  https://wiki.Mozilla.org/Thunderbird: test: Antivirus_Related_Performance_Issues #McAfee

• IMovie 09 with El Capitan will not otherwise pictures/iphoto or itunes - projects lost forever?

  Simple (I hope) questions on imovie and iphoto/photos/itunes... Well simple enough...

  I use imovie 09 with El Capitan. As you know that el Capitan not including iphoto, imovie 09 can no longer access to iphoto.  Pictures is the replacement for iphoto and imovie 09 will not otherwise be. Finally, imovie 09 access is more itunes.

  I have so many projects that are now useless, like all pictures and external soundtracks are more accessible.

  IF I update to imovie 10 version (a snip at £10.99 apparently)...

  (a) my imovie 09 projects will be viable, IE. will be links to the (ex-iphoto, now photos) images and itunes files to recovery for my old projects are not lost forever?

  (b) the new imovie will be able to access photos and itunes as good old imovie 09 used to before el capitan burned its bridges for her?

  This may be academic, because in some things I can't access my old projects in any case. What is scary and sad.

  But any assistance gratefully received. Thank you!

  I use imovie 09 with El Capitan. As you know that el Capitan not including iphoto, imovie 09 can no longer access to iphoto.

  Have you tried updating iPhoto version 9.6.1? This version works well on El Capitan and iMovie 9.0.9 shows iPhoto libraries in the photo browser. The screenshot below is from iMovie on OS X 10.11.5 9.0.9: I don't have older versions of iMovie, if they are still able to see the iPhoto library.

  

  You can update to iPhoto 9.6.1, if you have a version of iPhoto 11, which shows the history of your purchases on the App Store in, see user Barney'a trick:

  Can't update iPhoto because it is not available in the App Store.

  Your question (a)

  I migrated libraries iMovie 9.0.9 to 10, some time ago, and the conversion was lossless. But I can't test what will happen now.

  Your question (b)

  iMovie 10.1.2 shows me all the libraries of my picture in the Media tab - the iPhoto, Aperture, photo library library library, also a long time that you have installed the compatible applications.

  And the iTunes Library will accomplish in the Audio tab.

• Release notes involve 26.0, but download links fetch 25.0.1 stub

  Several places have links that fetch heel 25.0.1, but the next was 26.0 available for Windows, English:
  https://www.Mozilla.org/en-us/Firefox/all/

  Hello, 26 of Firefox is just being released, so outside might take a few moments until all resources updated.

• How can I keep albums of music forever?

  I'm kind of thinking that I want to save a little money by keeping these pieces forever. I buy like 200-$300 worth of music on my new iPhone 7, but keep the piece on for many years, from now on, that 50 years later, when I am in my 80 s. transfers music on my Mac, then on my Android phone without paying through the iTunes Store illegal music? Often, I hate having to pay because they take the time now, and I want to get used to for decades.

  If you buy music with your iPhone, you can keep it for as long as you want and move to an Android device, if you wish. You don't need to pay extra for this ability. Music purchased from iTunes Store doesn't have any DRM protection on what prevents you to use it on any device you own.