Reading loop DAQmx only reaches the speed of Communication series

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• loop running only when the mouse or keyboard are active

  Hello

  I started a few weeks ago a pretty big VI. Most of the program is included in a large loop. But I feel it's to slow down unnecessarily. So to optimize it, I would like that the VI only works when the mouse or keyboard is acting on it. It would free up the CPU when I do not use it without having to shut it down. I found on the internet how to use the "wait for" to slow down the loop, but in doing so, some parts of the VI that must run in real time also slow down. I think that my idea should be more effective as well for applications in real-time and to free the memory.

  Accordingly, how can I ask the while loop to skip to the next iteration only when you press the mouse button or when a field is filled by the keyboard? Or is there an alternative for the while loop?

  Thank you

  Isaac

  Hello

  You can check this by using the structure of the event and monitor the activities of the mouse and the keyboard.

  I have change a simple VI to show this, please see the attachment.

  

  In the meantime, you can consult this example available on ni.com

  http://zone.NI.com/DevZone/CDA/EPD/p/ID/3924

  Kind regards

  Lou KwokHow

  AE OR Singapore

• updated my iMAC 7.1 with 4 GB of memory with the intention to go to El Capitan, but after reading how it slows down the speed, I was wondering if going to Yosemite is a better choice.

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• Query to only reach the one-to-one relationship data

  Hello
  
  I am looking for a query search lines with one-to-one relation ship.
  To keep it simple here is the code example.

  CREATE TABLE my_storegroup_gbcust
  (
    store_grp_id        NUMBER(6)                 NOT NULL,
    group_buy_cust_num  NUMBER(5)                 NOT NULL
  );
  
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (1002, 70001);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (1003, 70001);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (1004, 70001);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (1005, 70001);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (1006, 70001);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (2001, 65000);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (28001, 21800);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (35001, 27010);
  INSERT INTO my_storegroup_gbcust (store_grp_id, group_buy_cust_num ) VALUES (35001, 37927);
  
  select * from MY_STOREGROUP_GBCUST
  
  STORE_GRP_ID     GROUP_BUY_CUST_NUM
  ------------     ------------------
  1002               70001
  1003               70001
  1004               70001
  1005               70001
  1006               70001
  -----------------------------
  2001               65000
  -----------------------------
  28001               21800
  -----------------------------
  35001               27010
  35001               37927

  The data in the table describe 3 types of relationships.
  Many-to-one = > several groups to buy a group of stores = > example: 1002,1003,1004,1005,1006 mapped to 7001
  One-to-one = > Group a store to buy a group only = > example: 2001 mapped to 65000. 28001 mapped to 21800
  One-to-many = > store group in many group buy = > example: 35001 mapped to 27010,37927
  
  I am now able to achieve through one-to-many and many-to-one query per as below:

  select group_buy_cust_num,count(*) from MY_STOREGROUP_GBCUST group by group_buy_cust_num having count(*) > 1
  select store_grp_id,count(*) from MY_STOREGROUP_GBCUST group by store_grp_id having count(*) > 1    

  But how do individual exclusively.
  
  Thank you
  Raj.

  Hello

  A way

  select      store_grp_id
       , group_buy_cust_num
       , case when x = 1
            then case when y = 1
                      then 'One to One'
                 else 'One to Many'
                 end
            else 'Many to one'
            end z
  from (
       select store_grp_id
            , group_buy_cust_num
            , count(*) over (partition by store_grp_id order by null) x
            , count(*) over (partition by group_buy_cust_num order by null) y
       from my_storegroup_gbcust
  )
  

  Concerning
  Anurag Tibrewal

• concatenate the hexadecimal code set by the user for communication series

  Hello.. I'm a newbie to LAbView. I am trying to contact a power supply Source. for which my order will be in the format of 4 to 5 bytes; for example, to set a voltage of 220 VAC, it's 1509 0898 in hexadecimal, 15 of which is binding for all orders of shaky writing, 09 for various operations such as setting Volatge or FREQ. and last four digits 0898 is a 2200 (by 220.0VAC) hex code.

  By sending the complete command 1509 0898 in hexadecimal Serail port communicating my source, even in the giving them using string concatenation as 1509 is the first chain and 0898 in second, it works fine.

  But these last two bytes would be defined by the user and can therefore vary in digital, so I put a number of Hex code conversion there before concatenation. who does not send the code Hex 0898 as reqd.  but this garbage to send value... 3038 3938

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• Help, please! Imported MP3 playing at twice the speed of reading!

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• Increase the speed of playback of the clip

  In the first Clip for Android, there is a slider to change the speed of the clip 25 to 100% of origin.

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• The most effective way to log data and read simultaneously (DAQmx, PDM) high data rates

  Hello
   
  I want to acquire the data of several Modules cDAQ using several chassis to
  high data rates (100 k samples per second if possible). Let's say the measurement time is 10 minutes and we got a large number of channels (40 for example). The measured data is written to a PDM file. I guess, the memory or the HARD disk speed is the limits. For the user, there must be a possibility to view the selection of channels in a graph during the measurement.

  My question: what is the best and most effective way to save and read data at the same time?

  First of all, I use an architecture of producer-consumer and I don't want to write and display the data in the same loop. I expect two possibilities:

  [1] to use the 'DAQmx configure logging.vi' with the operation 'journal and read' to write the data to a PDM file. To display the data in a second loop, I would create a DVR samples documented and 'sent' the DVR for the second loop, where the data will be displayed in a graph (data value reference). This method has the disadvantage that the data of all channels is copied into memory. Correct me if I'm wrong.

  [2] use 'DAQmx configure logging.vi', but only with the "journal" operation to write the data to a PDM file. To view the selected data, I had read a number of samples of the TDMS file in the second loop (I'm currently writing the TDMS file). In this case, I have only one copy data from the selected channels (not), but there will be more HARD drive accesses necessary.

  What is the most effective and efficient solution in this case?

  Are there ways to connect and read data with high frequencies of sampling?

  Thank you for your help.

  You say that the measurement time is 10 minutes. If you have 40 channels and you enjoy all CHs at 100 kHz, it is quite a number of values.

  In this case, I always try to approach under the conditions of use. If a measure is only 10 minutes, I just connect all PDM data and create a graphic module that could be in the same loop of consumers where connect you the data. You can always work on the raw data files big offline afterwards, the extraction of all the information you need (have a look at the product called NI DIAdem: http://www.ni.com/diadem/)

  The main issue is that the user needs to see in the graph (or perhaps a chart can be useful too). Lets say that the graph is 1024 pixels wide. It makes no sense to show multiple data to 1024 points, Yes? Every second will produce you 100 data points k per channel. What is the useful information, which should see your username? It depends on the application. In similar cases, I usually use some kind of data reduction method: I use a moving average (Point by point Mean.VI for example) with a size of the interval of 100. This way you get 100 data points of 1000 per channel every second. If you feed your graph every second with these average values, it will be able to data points in 1024 of the store (as a default) by channel (curve), which is a little more than 10 minutes, so that the user will see the entire measurement.

  So it depends on the frequency at which you send data to the consumer. For example, collect you values 1024 by iteration of the producer and send it to the consumer. Here you can make a normal means calc or a bearing (according to your needs) and he draw a graphic. This way your chart will display only the values of the last 10 seconds...

  Once I programmed some kind of module where I use a chart and not a graph, and the user can specify the interval of the absolute timestamp that is traced. If the data size is larger than the size of the chart in pixels, the module performs an average calculation in order to reduce the number of data points. Of course, if you need to see the raw data, you can specify an interval that is small. It all depends on how you program zoom functions, etc... In my case I hade a rate of 1 Hz, so I just kept all data in RAM limiting the berries to keep 24 hours of data, so that technicians could monitor the system. In your case, given the enormous amount of data, only a file read/write approach can work, if you really need access to all of the RAW data on the fly. But I hope that the values of working capital means will be enough?

• Processor does not reach 100% of the speed of the clock when 'PCI Lock' is disabled in the Advanced Start parameters

  Hi guys,.

  Ran into a strange problem, so thought I'd give this forum to try. Tried to discuss on the Windows forums community but they have been seen nothing of all this.

  I noticed that the machine felt slow in the last month, but never gave him much however. Today, for some reason, I opened the Task Manager and noticed that no matter how much charge the CPU is obtained, the speed does not pass more than 2.28 GHz (Standard clock speed is 2.3 GHz). Now, at first I thought that it could be the power settings, since I got the butterfly processor speed previously by reducing it to 95%. After a few game, I spread the power settings, since the system does not meet them if you cut the State of maximum power, the processor speed drops too. When the value to 100%, it does not more than 2.28 GHz. In other words, since it's a pocessor mode, because it reaches its full capacity, it won't in mode.

  I updated the drivers and BIOS from the manufacturers Web site. The only way to fix this is by checking the box 'PCI Lock' in the advanced in msconfig startup options. When the box is checked, the computer restarts and the processor works properly, increasing up to 3.3 GHz. The only problem with either once the box is checked, problems with other devices, for example, the network card is not recognized at all. Uncheck box reboot and network card functions as it should, but the processor is throttled.

  I don't know if it could have a bearing on the question somehow, but fails the secondary HARD disk spin down according to the power settings. It is supposed to stop after 1 minute, but despite having no activity (in resources, or audible reads/writes monitor) it keeps spinning. If you have any advice on the processor, maybe you have an idea on this instead? His eating his power and producing unnecessary heat and noise because the hard drive is used for backups.

  The specifications are:

  Reference Dell M3800

  Windows Pro 10

  CPU i7-4712HQ 2.3 GHz (up to 3.3 GHz)

  16 GB OF RAM

  512 Samsung SSD (with BONE)

  Secondary 1 to

  I don't know when the issue started, since performance was slow for about a month and I can't blame new facilities for this. The PCI lock seems the only way to solve the problem temporarily. All the drivers are up to date, even tried downgrading and upgrading the BIOS. Only the PCI lock seems to have no effect.

  Any help would be greatly appreciated!

  Hi cc171,.

  Thank you for your continued support.

  After a few more game, I'm desperate and "reset" of the operating system (keeping my files). That, to my surprise, did not help. I've done some windows system checks in the cmd (sfc and dism) and tools are a few corrupted files (which they were unable to repair due to files being corrupted as source). I then provided dism an iso windows fresh to keep system files to and managed to fix the image. Unfortunately, this does not solve my problem.

  Here are the corrupt system file that could not be repaired:

  Could not reproject corrupted file [23 ml:24] "? \C:\WINDOWS\SysWOW64"\[l:10]"opencl.dll"; source file in the store is also corrupted

  I then proceeded to do a complete factory reset (because I lost all my applications anyway, there was nothing else for me to lose). The system restored to W8.1, which is really strange, because I deleted all the files of previous windows.old through disk cleanup. Even if I had retired, good news. The limitation was missing, and the drive turned down when realized. I've been invited to upgrade to W10, I did (the download process and installation is rather time consuming...) and once up and running, the CPU still works correctly.

  Of course, my next step, has been updated all my drivers using my product key on the DELL Web site.

  I downloaded everything manually and kept checking my processor after each installation/reboot. Everything worked fine until I installed the:

  * Intel platform dynamic and thermal setting driver *.

  After a reboot, the Task Manager showed once again to the top of the formidable GHz 2.28. I put a system restore point, just like windows has fully booted, before updating the drivers, so I decided to restore it at this point. No luck, the processor still be strangled. Because I have nothing to lose, once more, I do a reinstall full (which once more, the rolls be back to W8.1. After around an hour, the W10 up and running. I went to update all my drivers, exuding the platform driver and dynamic thermal setting, with reasonable success. The processor is no longer limited. The only problem, after installing the motion sensor driver, the HARD drive stopped spinning down. At this point, I don't have time to play, decided not to back down.

  Thus, at the end of the day, the culprit to my problems were the official DELL drivers:

  System utilities | Intel platform thermal and dynamic framework pilot (104 MB)

  &

  ST Microelectronics LNG3DMTR pilot sensor of movement (35 MB)

  With the new installation of Windows (and the Motion Sensor installed Driver), once more SFC/scannow found errors that cannot be repaired. Thorugh DISM, I managed to repair the image of the system, but the HARD drive always turns freely. More importantly, the limitation is GONE.

  Regarding your questions above, I don't have a chance to check if there is power or the current limit, but there's certainly been no thermal regulation. The CPU is still relatively fresh, and fans did turn, even if very quietly (now with the processor works properly the temperature rises up to 84 degrees (up 3.29 Ghz) and fans spin very hard under prolonged load).

  Regarding the HDD, no system or other utilities consulted the reader (analyses excluded antivirus, indexing and so forth that unchecked, the disc is only used as a manual backup). Even if the HARD drive isn't spinning down, no limit certainly makes life a lot easier. Ill wait for a new version of the driver for the motion detector see if it solves the problem, if not, disconnect the drive from the motherboard may be my only option.

  I don't know why the official Dell drivers could corrupt the file system, since they were after all, designed for this particular system, on this particular operating system. There are no other programs interfere with their installation and operation, given that the pilots were the first things to be updated.

  At the end of the day, I found the problem, it's a good step forward, but it seems that the resolution is out of my reach.

  Thanks for your help!

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• URGENT::opening multiple files - i have 3 files in my directory... When I run the code I can open a file and read it... but the while loop get blocked after the first iteration... can someone me help or give some indications

  bbmChatDB of public database;

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  e.nextElement ())

  Once a loop iteration.

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  {} catch (Throwable t)

  t.printStackTrace ();

  System.out.println ("Eception exception:" + t.toString ());

  }

  I think your code is thrown an exception and you don't see it.

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