Continuous double buffer waveform generation

[Storm]

I have NI 6552 a 32bit wide I/O card ( 100Ms/s with 64MB memory )

I would like to create endless stream of data using data source from HDD.

Can I do that? or do you any other idea ?

Thanks

Message Edited by Storm on 09-26-2005 09:31 PM

[JKnMI]

The answer is yes. Are you using LabVIEW? If so, there is a great example that demonstrates how to do this with an HWS file. It is a shipping example called Dynamic Generation with Repeat Mode.vi. It installs with the NI-HSDIO driver. You can get to it by going into LabVIEW then to Help>>Find Examples>>Harware Input and Output (Folder)>>Modular Instruments>>NI-HSDIO>>Demos>>Dynamic Generation with Repeat Mode.vi

For CVI, the same example is called DynamicGenerationWithRepeatMode.prj Help>>Find Examples>>Harware Input and Output (Folder)>>Modular Instruments>>NI-HSDIO>>Demos>>DynamicGenerationWithRepeatMode.prj
Regards,

Jessica
Applications Engineering

Message Edited by JKnMI on 09-28-2005 11:55 AM

Message Edited by JKnMI on 09-28-2005 11:55 AM

[Storm]

I would like to re-explain my self.

I didn't mean REPEAT mode, I meant something like streaming from HDD to HSDIO, I need to stream 2GB in 80Ms/Sec

Can I do that?

[JKnMI]

Sorry for the misunderstanding. The answer is still yes, under certain conditions. National Instruments works with one of our Alliance members, Conduate Corp. (click the contact info tab to get phone numbers and emails) to integrate our digital boards with their StreamStor high-speed HDD recording/playback board. This will allow for HDD digital reads rates up to 120MB/sec. Now, the number of "samples" you generate per second will depend on the size of the sample. If you want to send 8-bit samples, you can get up to 120MS/sec, but if you are generating 32 bit samples, you can only get up to a sample rate 1/4 that size, or 30MS/sec.

Jessica

Message Edited by JKnMI on 09-29-2005 10:23 AM

[JKnMI]

I misspoke with that last post. For HSDIO cards, one sample is one bit, not one byte.

Jessica