How do you wire a waveform vi to a analog out vi?

i keep getting error inappropriate use of. what doe's this mean? And how do I fix it?
thanks jeff

Which waveform VI are you trying to connect? Where are you trying to connect it? It sounds like you're trying to connect two outputs together and that's not allowed. Provide some more details on what you're trying to accomplish and even post a picture of the VI or even better would be the actual VI.

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Greetings All
I've been looking at the example Sim Phone.vi that comes with labview and would like to generate similar tones out of our usb 6008 device. I can get a very faint sound out of our usb 6008 using the example Gen Multi Volt Updates-SW Timed.vi Does anyone know the best way to alter Sim Phone.vi to have the sound come out of the Analog output of our usb 6008 device. ( I have a small speaker connected to the Analog out on our USB 6008)
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Does anyone know the Analog output frequency range of the usb-6008? Is this possible?
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Attachments:
Gen Mult Volt Updates-SW Timed.vi ‏78 KB

Hi sal2,
As stated earlier you could most certainly use the USB device to generate sound, but that would be at a max update rate of 150 Hz. While according to Nyquist theorem you could get frequency information for signals below 75 Hz, you may notice that the quality of the data in that spectrum to be very low due to having so few samples.
While technically possible to produce you really should look for a device with a faster Analog Output update rate. I would look for a device that supports Analog Output at least 10x the maximum frequency that you want the user to hear. Some great, yet lower cost products, would be the M-Series line of products. They would give you the performance that is really needed in the type of application that you are talking about.
If you still want to use the USB Device, then you would need to use code similar to that found in the example Gen Mult Volt Updates-SW Timed (Found here: C:\Program Files\National Instruments\LabVIEW 7.1\examples\daqmxbase\Dynamic\ao).
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Training and Certification
Product Support Engineer
National Instruments

How do you update two waveform graphs at different rates?

Hi there!
This is my first post after lurking and reading for a couple of weeks. I am relatively new to Labview so this website has been a tremendous resource. Here's to hoping that you guys can help me out.
My problem has to do with graphing two sets of waveform data. I have a USB-6218 DAQ device and I am acquiring a voltage reading for a thermometer and a voltage reading from a power supply. Essentially what I want to do is update the thermometer voltage graph about once a second while leaving the power supply voltage graph updating continuously.
I know that my device can only capture data at a constant rate so I customized the DAQ capture parameters strictly for the power supply voltage. I also know that to display the temperature data I would have to throw away some of that data so I can get just the one temperature a second.
This is where I am stuck though. Can someone please offer some advice as to how I can go about doing something like this? Would I have to convert the waveform data into arrays and manipulate the values? If so, do you lose the time information in the waveform when converting to arrays?
Thanks a lot in advance!

So I made a case structure where if the elapsed time is 1 second then initiate the waveform. It's a start but all it does is have a 1 second gap in the data. I'd like for it to be continuous. Maybe I'm not setting up the case structure correctly. Can you please advise further?
Thank you!
PS Attached is my VI.
Attachments:
TemperatureCapture.vi ‏114 KB

How do you output different waveforms on 2 channels with circular buffers?

I'm trying to program the PCI-6711 to output two different complex waveforms on DAC0OUT and DAC1OUT using Visual Basic. I'm working from the VBasic WFMdoubleBuf example by expanding the number of channels and the ChanVect to the two channels and loading and transfering to two different channels. I am filling the initial buffers by inputing data from a file But instead of seeing separate but synchronized waveforms on the two channels, I'm seeing no waveform on DAC0OUT, and a combination of the two waveforms on DAC1OUT. What am I doing wrong?
Attachments:
frmRun7.frm ‏17 KB

Roz,
Calling the WFM_Load() function multiple times for multiple channels is useful only if you are not doing double buffering. When you do double buffering, the WFM_DB_Transfer() function requires that the two waveforms be interleaved. The KnowledgeBase linked below discusses this in more detail:
Waveform Generation on Multiple Channels Using PCI E Series Boards
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iStatus = NIDAQMakeBuffer(pdBuffer1, ulCount, WFM_DATA_I16);
if (iStatus == 0) {
/* If buffer was made correctly, then output it. */
iStatus = WFM_DB_Config(iDevice, iNumChans, piChanVect,
iDBmodeON, iOldDataStop, iPartialTransferStop);
iRetVal = NIDAQErrorHandler(iStatus, "WFM_DB_Config",
iIgnoreWarning);
iStatus = WFM_Group_Setup(iDevice, iNumChans, piChanVect,iGroup);
iRetVal = NIDAQErrorHandler(iStatus, "WFM_Group_Setup",
iIgnoreWarning);
iStatus = WFM_Scale(iDevice, piChanVect[0], ulCount, 1.0, pdBuffer0,piBuffer0);
iRetVal = NIDAQErrorHandler(iStatus, "WFM_Scale",
iIgnoreWarning);
/****************INTERLEAVING OPERATION**************************/
/*For analog output on multiple channels, the data should be interleavedbefore outputting.*/
for (i=0;i{
piBuffer[2*i]=piBuffer0[i];
piBuffer[2*i+1]=piBuffer1[i];
/****************INTERLEAVING OPERATION**************************/
iStatus = WFM_Load(iDevice, iNumChans, piChanVect, piBuffer,ulCountTotal, ulIterations, iFIFOMode);
iRetVal = NIDAQErrorHandler(iStatus, "WFM_Load",
iIgnoreWarning);
iStatus = WFM_Rate(dUpdateRate, iUnits, &iUpdateTB,
&ulUpdateInt);
iRetVal = NIDAQErrorHandler(iStatus, "WFM_Rate",
iIgnoreWarning);
iStatus = WFM_ClockRate(iDevice, iGroup, iWhichClock,
iUpdateTB, ulUpdateInt, iDelayMode);
iRetVal = NIDAQErrorHandler(iStatus, "WFM_ClockRate",
iIgnoreWarning);
printf(" The waveform should be output at a rate of %lf updates/sec.\n", dUpdateRate);
iStatus = WFM_Group_Control(iDevice, iGroup, iOpSTART);
iRetVal = NIDAQErrorHandler(iStatus,
"WFM_Group_Control/START", iIgnoreWarning);
Good luck with your application.
Spencer S.

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http://zone.ni.com/devzone/cda/tut/p/id/5247
http://zone.ni.com/devzone/cda/tut/p/id/5243
http://zone.ni.com/devzone/cda/tut/p/id/7605
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Choose Movement Consulting
choose-mc.com

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Message was edited by: SilverSkyRat

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When I select a cell, I want the selected cell to stay selected, but have the highlight fade out immediately. I can't see any options to achieve this effect. I've tried using the setHighlight edmethod to set the cell to be unhighlighted in the didSelectRowAtIndexPath method:
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How do you wire a waveform vi to a analog out vi?

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