shikhadrdo wrote:

> hello 
> iam working with tiger sharc 101s.
> my problem is iam collecting some 4K of samples and processing it ....
> ex:like some spectrum is being generated using those 4k sample points.
> Now that spectrum has to be plotted on the Computer screen.This DSP card
> is PCI add on card hence it is placed in the PCI slot of the same PC.
> 
> So pls tell me how can aChunk of memory be shared by the host PC 
> and DSP module.

That depends entirely on the design of your board.  Your best bet to 
find this information is to consult the documentation for your board.

> Is there any concept of shared memory.

Yes, shared memory is a pretty common concept.

> If yes how can that be programmed .

In general one processor writes, then signals the other through some 
hardware-dependent method, then the other processor reads.  Details of 
how it's done on your hardware depends entirely on the design of your 
board, etc.

> Pls help me out.If u have any any information of some  related sight pls
> tell me .
> urgent help needed.

I suggest that you look in your board documentation to find how the 
board manufacturer wanted you to communicate with that board (it may not 
be shared memory, it may be through DMA or some such).  Look for sample 
code; if you can find an example app with code it'll shorten your 
learning cycle tremendously.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

hello 
iam working with tiger sharc 101s.
my problem is iam collecting some 4K of samples and processing it ....
ex:like some spectrum is being generated using those 4k sample points.
Now that spectrum has to be plotted on the Computer screen.This DSP card
is PCI add on card hence it is placed in the PCI slot of the same PC.

So pls tell me how can aChunk of memory be shared by the host PC 
and DSP module.Is there any concept of shared memory.If yes how can that
be programmed .
Pls help me out.If u have any any information of some  related sight pls
tell me .
urgent help needed.


		
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