The fixed Point data

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• fixed point math with shift on FPGA register

  It would be easy, but it's on FPGA.

  Essentially, I want to do what is shown, but with fixed Point data. I also need my release of the add function to be <+,32,0>, as she goes into a generation of sine wave VI as the frequency. Basically I want just the frequency to rise slowly to "step size" at certain pre-defined rate. Is it possible to do? There must be a way I can do number table boolean then table of Boolean number, do a few manipulations to the bitwise and convert to the point type fixed I want. But I can't understand it. I also read some fixed point on NI.com unsuccessfully to operate. Frankly, fixed-point math always escapes me.

  Any suggestions?

  

  Ah, what the trial and error method will do for you.

  It seems to work.

  

• fixed point conversion

  How do I know how LabVIEW manages type conversions and type cast to point fixed.

  In particular, I have two problems:

  (1) assume I want to convert an integer signed 32-bit to a point fixed <+ ,20,20="">with the function "-fixed-point."

  Of course this conversion involves a waste of bits. LabVIEW will keep the most significant bits, or those less important?

  The same problem occurs if I want to convert a fixed point of data (for example <+ ,20,20="">) to another fixed point data with fewer bits (for example <+ ,10,10="">).

  (2) I have a data represented with a point fixed <+ ,20,10="">and I want to cast to a point fixed <+ ,15,5="">by removing 5 whole bits and keeping the sign.

  For example, I have the number - represented 1.5 in <+ ,20,10="">and I want to convert it to <+ ,15,5="">(to be noted that the two representations can express the number correctly).

  How can I do such casting?

  Thank you

  Hi Tom,

  That's a fair criticism, there are probably a few tribal knowledge implicit in the documentation. I'll give some briefing notes that might help a little:

  • LabVIEW makes a distinction between the functions of conversion (aka "balls") and casts. Conversion always functions are trying to preserve the numeric value, with a handful of out-of-range values with different rounding and overflow modes. Conversions integer/integer wrap, while all other combinations round to closest and saturated by default. If the destination is FXP, you can configure the modes.
  • Coercion points have the same behaviors as their corresponding conversion function.
  • Type cast is not supported on the FPGA
  • The fixed point to whole and entire Cast to fixed-point slur was created with use FPGA to mind cases. They are not pure bit casts, because they support extension of sign for an arithmetic scaling, as well as ways of handling overflow. I hope that the new documentation is a bit clearer on their behavior.
  • Number of reinterpret is a little pure cast to numbers FXP or integer, available on digital > palette to comma fixed only under target FPGA. It simplifies the behavior by limiting the length of the input word and output is the same.

• How do the box values ring to have figures after the decimal point

  How do the box values ring to have figures after the decimal point

  Thanks in advance

  Control properties editor:

  Change the representation in the floating point data Type tab type, DBL will do.

  Then go to the Page of display Format and increment 'Numbers' to something greater than 1

  That toggles the column of values on the tab change the items to % .6f, or 6 digits of precision. Uncheck sequential following, values and you're there.

  If you think that's too restrictive, go back the display Format, then select if rating and you can type anything (but, the editor has a hissing fit, so you must load chains and property [] with a property node values programmatically)

  I've been struggling to get OR improve this editor of properties of the years!

• Table 2D-fixed points allocated to the amount of disk space!

  Hello

  I'm trying to create a 2D table file that will be saved on a real-time target. And should be read by my application in real time.

  To create a file as small as possible I have it recorded in fixed point format. (integer 16 bits 6 bits)

  The table size is 1024 X 1024 data points which is ~ 1 M data.

  If I save the file to the DBL format I expect to get 8 MB (each data point is represented by b bytes) of the file - and that's what I

  If I save a U16 format, I expect to get 2 MB file - and that's what I indeed.

  I waited get a 2 MB file with fixed point format-, but as you can see in the screenshot - I did not!

  No explanation why the checkpoint file is fixed so great?

  Thank you

  The FXP is 64-bit internally.

• host vi data only appears in fixed point format

  Hello

  The FIFO DMA are configured as fixed point integer length 16 and with note 19. When they are acquired by DMA FIFO in FPGA entire watch and mantissa. But when acquired his watch only the integer in host and I lose mantissa. He get rounding upward? Is there a way I could get the accurate data both the mantissa and integer?

  Ta

  Hello

  The table of fixed points in your host vi application is defined as: 33 bit word length and 33 whole bit, in this way you will be non-integer values.

  You must change your configuration of fixed point. Right click on the table, select properties and change the parameters in the tab type data of select simply adapt to the source.

  Hope this helps,

  Paulo

• Understand the values fixed point of a NOR-9203

  I have a cRIO-9073 with a NI 9203 module. In LabVIEW FPGA, the card values are returned as a fixed point. LabVIEW chosen fixed point properties are (+/-, 21-4) that apparently offers a range of (- 3.125E - 2, 3.125E - 2, 2.98E - 8), and the current card in the range 4-20 MA with a resolution of only 16 - bit. My understanding of fixed point values is only slightly, then someone can explain to me why a 21-bit value is required for the 16 - bit acquisition data?

  Hi Thoric,

  Sorry, it took a while to get a response to you.   The necessary extra bits with fixed point representation are for the overflow feature.  There is more information in the link below.

  http://zone.NI.com/reference/en-XX/help/371361E-01/lvconcepts/numeric_data/#FXP_overflow

  I hope that this answer to your question, but if you need more help please let me know.

  Kind regards

  Thomas Clark

• The research of data points in a cluster

  Hello.

  I'm using LabVIEW 2013 to myRIO. IM facing a problem with the implementation of a few things with the clusters.

  Problem statement: coordinated map recorded for a GPS on a map and the use of the cursor functionality to check the value of the various sensors on different parts of the track.

  I was able to map the contact information stored on a card in LabVIEW. I create an array of the coordinates, to group and then move them to an XY Chart. Cursor has also been implemented. I click on the map and drag my mouse and it takes me to different coordinates.

  What I can't do, is show other data senors for the coordinates x, Y.

  My plan is to consolidate all the data from sensors in a cluster, and then try to find the cluster for the necessary points of X, Y.

  How a search within a cluster by specifying only X, Y

  for example: I give to X, Y and I get the value of all the sensors for this pair x, Y?

  Thank you

  
  

• Write the table of data (with a fixed size)

  Hi fellow users of LabView,.

  My problem is very basic, I'm sorry about that, I'm just a beginner

  I get continuous data of a function and I want to write them in a table with a fixed size. The fixed size is because I want to get the max/min of the latest x items entry. I tried this for an hour now with different approaches, but nothing seems to work, so I'm quite frustrated to post my problem here.

  I hope that the VI is understandable even with foreign securities. Basically, I want to make two light up if my data within a period equal to or less than a reference value.

  I'm grateful for any hint of help

  Use min & max ptbypt with the length of the buffer desired story.

• Put the data of the set point in a waveform graph

  Hello

  In a graph of measure, which is the result of a waveform, I would add data of the set point as well. How can I add this data to set for the chart value?

  In a control loop system, the output is controlled by a labview program. I would like to see the point of this system as well as in the graph, these thresholds are changed at random times, so I don't know how to create a waveform of these data. Should I create a waveform of the setpoint, or y at - it another option to show the set value in the chart?

  See you soon,.

  Rolf

  That can make it much more difficult.

  At one point an array of 1000 points need to be assembled (obviously). How do depends greatly on your structure. Synchronize the time of the two signals can be very difficult. It would be easy if the set value only changed once a cycle of 1000 point.

  You may want to read the SP as an analog input, so you get 2 samples of the material here. In this way the two will always be synchronized. But I'm done alleady assumption, like this, the signal is an analog input (and the target value of one analogue output). What equipment do you use?

  I think always need you a loop to get data and a loop to set the SP. The two loops will be more parallel execution GLSL and synchroniseent. The trick is to synchronize, or for the deterministic timestamps in two loops. If you can make that happen, you 80% there. You could do loops timed loops (using the same clock). Then you get the timestamps in two loops. The MS loop has the queue changes, pushing the value and time. Then the loop of data can use values and hours to create examples of sp 1000.

• Dates of the Restore Points are one month in advance

  For reasons I don't understand, the date of the day on my computer was changed to one month before the effective date, for example from May 13 to June 13, 2013. As a specialist, I kept getting messages that my Microsoft Security Essentials were outdated. Later, I discovered that all the restore points created after May 13 are dated June 13. I corrected the date and have updated Security Essentials and things are back to normal, but I have several restore points, a month in advance. Restore recent points are correctly dated now, but what can I do on these wrong, before the restore points. Thank you.

  If the pc works fine, then 2 options:

  1 turn off the system restore, which will remove all items, reboot, restart System Restore, and a system checkpoint will be created.

  2. go to disk cleanup, use the tab options, System Restore, cleanup, it will erase everything but the last system restore points.

• I have windows xp. The fix for microsoft data center could not scan my computer because it says that an error has occurred

  I just installed the fix for microsoft data center and I couldn't run a check on the various problems because they said and the error has occurred.

  Hi Carroll,

  If the problem is just related to the execution of the Microsoft Fixit tool, I suggest that you post your question on the Forums of Microsoft Fixit.

  Microsoft Fix it Center Forums

• Mobile data does not and the name of the Access Point settings are not available

  I don't have a mobile data, not even the small up and down arrows or letters beside the sims signal bars appear.

  I tried all the troubleshooting settings and different type of network, the airplane mode is off, mobile data are no limit, no power save modes are on. Phone is dual sim so I tried on the two sims and tried to disable the other sim and changing the sim slots, both sims are loaded with a credit of data that works in other android devices. WiFi works fine. Factory reset does not help.

  There is that one thing that I can't not try troubleshooting. When I select settings > more > mobile networks > access point names, it says

  "Access Point name settings are not available for this user.

  Maybe if I could put APN I could get mobile data. How can I do or how I can try to get mobile data to work?

  Phone's Xperia M4 Aqua E2363 with build 26.1.B.2.102 thanks if you can help

  This text is a bit misleading, which is something that I have forwarded internally as your comments.

  If you have no NPP stored the phone displays the text "the name of the Access Point settings are not available for this user" even if you use the owner account and have access to the settings.

  Try to download the automatic settings from settings-> more-> Internet settings and see if that helps.

• set a restore point date in the past on Windows Vista

  When I went to do a system restore it have NO restore points saved. I created one, but it only allowed me to create this point to restore to the current date. He asked me to name the restore point and said 'date and time will be added automatically. It defeats the purpose! I'm having the issue now. I need to restore it once already. Windows XP makes it easy. Vista, not so easy. To be precise, I want to create a restore point that has dated June 1, 2010. HOW DO I DO THAT?

  You can't do that.  You cannot create a restore point in the past.  If there is just no saved restore points don't then that is pretty much the end of the line, you won't be able to restore the system.  I recommend to close and restart the computer, be sure that you are in the right place to restore the system, rather than to the place where you create restore points. In Vista and Windows 7 both actions (create a point and restore to a point) are now in different places.  If you are not sure, click on the start ORB, then type system restore in the box to access the System Restore tool.

  "whp_3" wrote in the new message: * e-mail address is removed from the privacy... *

  When I went to do a system restore it have NO restore points saved. I created one, but it only allowed me to create this point to restore to the current date. He asked me to name the restore point and said 'date and time will be added automatically. It defeats the purpose! I'm having the issue now. I need to restore it once already. Windows XP makes it easy. Vista, not so easy. To be precise, I want to create a restore point that has dated June 1, 2010. HOW DO I DO THAT?

• Will system restore remove e-mail accounts created after the date of the restore point?

  Original title: System restore

  Will system restore remove e-mail accounts created after the date of the restore point

  Hello Nick,

  The emails and your gmail account settings would not be affected. But, if you have configured your user account in Windows 8 with the newly created Gmail account, these configurations too after the restore point then only, would be affected not the main account to the Gmail server.

  I hope this helps. Otherwise, feel free to write us again for more assistance, and we will be happy to help you come.

  Thank you