regarding act_screen.vi

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srikrishna
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regarding act_screen.vi

Post by srikrishna » Thu May 28, 2009 7:24 am

Hi all,
Can any body tell me whats the act_screen.vi will do? and please explain it implementation?

Coen
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Post by Coen » Fri May 29, 2009 5:54 pm

Act_Screen.vi calculates the amount of data ("Display Blocksize") to be read from the ringbuffer for the next iteration of the program.

Best regards, Coen (BioSemi)

srikrishna
Posts: 10
Joined: Fri May 22, 2009 5:16 am
Location: India

Regarding ACT_Screen.vi

Post by srikrishna » Fri Jun 12, 2009 9:35 am

1)In the actiview program,what is the necessity to use a ring buffer?we had queue vis already,why it is not used in the program?

Coen
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Post by Coen » Fri Jun 12, 2009 12:27 pm

The ringbuffer allows direct memory access (DMA), please share your "queue vi" that achieves the same functionality with us.

Best regards, Coen (BioSemi)

srikrishna
Posts: 10
Joined: Fri May 22, 2009 5:16 am
Location: India

Regarding Ring buffer...

Post by srikrishna » Fri Jun 12, 2009 12:36 pm

Hello coen,
How you are achieving DMA programmatically in this ring buffer?

Coen
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Post by Coen » Fri Jun 12, 2009 12:48 pm

Writing data from the ActiveTwo system into the ringbuffer is handled by the USB driver (also see viewtopic.php?t=76), ActiView just reads the data from the ringbuffer.

Best regards, Coen (BioSemi)

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