Xilinx FFT IP 7.1 (equivalent of 4-wire Handshaking)

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• Exhibitor block signal - Xilinx FFT v7.1 - FlexRIO - FPGA

  I use Xilinx FFT v7.1 IP (FPGA - OR 7965R, LabVIEW 2012). I am computing the FFT of real integer 16 bit signed.

  Bit 5 signal exposing block block floating point FFT in module v7.1 Xilinx FFT signed or unsigned? Pdf document talks shift to the right of the data output to use the dynamic range, mentions not moving to the left, neither gives sufficient detail on this subject.

  Is there a base value as format IEEE floating point should I use to find the correct output value?

  I guess that it is unsigned unless you have comments to the contrary. The basic behavior is to keep bits on the left in order to prevent any overflow, so the scale always implies move on to when you think that some of the more significant bits are unused. They provide an example of b00101 = 5, so that indicates there is no bias to apply.

• frequency of the FFT is not compatible with matlab

  Hi all

  Please find .jpg in the attachment. The signal is generated by a signal generator and collected by datashuttle/3000. Then I use the "FFT module" and "statistical value" to find the position max (frequency). I also downloaded the data and processed by matlab FFT function.  What I find, is that the value of the frequency of dasylab is always slightly less than matlab. For example, when the signal generator gives 10 Hz, the dasylab indicate 9,77 Hz and matlab gives 9.99 Hz I used matlab for years, so I have confidence in it. There must be something wrong with my program or dasylab.  First I have is because of the resolution, so I changed the "statistical values - mode - based block and tick (not quite sure about this) parent block and a value for every 240 blocks, which is also for the sampling of matlab."  Unfortunately, there is no change at all. Can anyone help?

  Thank you very much

  Alan

  What is your size of rate and sample block DASYLab?

  Try to make the block size an even number, for example, if you sample at 1000 Hz, made the size of the block 500 or 1000.

  What is the equivalent block Matlab? The amount of data is used for the calculations.

  You can also use the module block average average more than 250 blocks and then use the module of statistical values to calculate the maximum Position.

• Error 50400 FlexRIO example "Coprocessor FFT"

  As the title says, I have tried to run the example "FFT co-processor" located in LabVIEW 2013 FlexRIO PXI-7954R FPGA with examples but kept "ERROR-50400 occurred to the Invoke method: FIFO.» Write in TNI .vi co-processor (host). Possible reasons: the transfer has not completed within the time or in the specific number of retries. ».

  I use LabVIEW 2013 SP1 with Xilinx 14.4 of the compiler. I didn't modify the code except copied the FPGA vi to the PXI-7954R target newly added and recompiled; and change the FPGA VI reference in the host vi as a result.

  I tested the code in simulation mode (i.e., run VI FPGA on development with simulated IO computer) and it worked fine. However, when running on the target FPGA it does not work. I followed the 'empty remaining items' on "host-to - FPGA.Write" at the host vi and the value was 5. And "other" in "FPGA-to - Host.Read" in the host vi is 0.

  It has something to do with the FIFO buffer size? Suggestions or comments are greatly appreciated.

  Thank you

  Bing

  Theres a race condition in the code of the host. If you try to read before you write, then the FIFO is to expire. If you make sure that you write before you read while the timeout never occurs.

  Attached is a version of the host code that writes then reads using a state machine.

• How can I uninstall Sierra & return to El Capitan without an external hard drive or equivalent required by the instructions online?

  How can I uninstall Sierra & return to El Capitan without an external hard drive or equivalent required by the instructions online? I find too many misadventures and not happy.

  Hello

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  When I use the app to drive on my Apple Watch when I went up on a normal bike, not all of my journey is considered to be a workout.  I can be riding for an hour, but the app decides that the only parts of this time count for a workout.  The explanatory note said I have to do the equivalent of a brisk walk.  What is c?  Is it using my pulse?  If so, it's too bad because I take the medication that slows down quite to the bottom of my heart rate and it is very difficult to be in green all the time.  My bike course map is painted in green, yellow and Red areas.  So if I stop briefly for traffic, it is red and does not count.  If it's yellow, it doesn't count... so it appears.  This means that a one hour bike ride can have only 15 minutes of training time.  That makes no sense to me.  Have I not that bad?

  Tracy Rog wrote:

  ..  The explanatory note said I have to do the equivalent of a brisk walk.  What is c?  Is it using my pulse?  ..

  Progress towards your daily goal of exercise of credit, the application of the activity is to identify the activity equal or exceed the intensity of a brisk walk. This requirement applies as well to the general course daily wear and record training sessions through the training exercise credit app which is awarded for each minute during which this condition is met.

  The definition of a brisk walk varies from one person to another and depends on your personal information.

  To verify that this is correct - and update over time:

  • On your iPhone, in the application of the watch, go to: My Watch (tab) > health > edit - tap and adjust the settings, then press on in fact.

  Apple Watch uses different sensors and data sources to track the results of training sessions, depending on the type of activity. For example, with Apple Watch (first generation) and the models of series 1, the watch can access data matched iPhone GPS if it is taken along during the walk outdoors, running and cycling training. (Series 2 has built-in GPS).

  Calibrate your watch can improve the accuracy of the estimates made by the activity and workout app app. More information and instructions for calibration of your watch are available via the link below. The article also includes instructions for resetting the calibration data and leave.

  If you prefer to receive credits of exercise during the duration of your training sessions, regardless of their estimated intensity levels, follow them through the application of the training session using 'Other' as the type of activity. This credit a minute of exercise for each minute of the workout. Active calories will be estimated at a rate equivalent to a brisk walk or based on the data recorded by the heart rate sensor, according to what is higher.

  More information:

  • Calibrate your Apple Watch for better accuracy of training and activity - Apple Support
  • Use the activity on your Apple Watch - Apple Support
  • Use of the workout on your Apple Watch - Apple Support

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  Rgrds

  Chris

  Hello

  As far as I know, this laptop was delivered only for the Japanese market.
  Unfortunately, I'm not very familiar with the portable computers m Japan, but I found a site with a list of the hardware specification.
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  Good bye

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