Data Transfer in PCI Express

Posted: 02-24-2007, 04:58 AM

SlowTransfer

Guest
Posts: n/a

Thank you for reading.
I have a problem in data transfering with PCI Express Device.

When I try to send data using WRITE_REGISTER_BUFFER_ULONG function
I could send 10 words to my device correctly.
But data transfer was too slow. So I tried to find out what the problem is,

And I figured out that my device receives 10 packets for transfering 10 words.
That's why my device works so slow.

So, I want to ask if there any function which can transfer data in burst.

Thank you for your reading. I hope that you have a nice day.

Responses to "Data Transfer in PCI Express"

SergeV

Guest
Posts: n/a

Re: Data Transfer in PCI Express

Posted: 04-03-2007, 03:46 AM

Good question.
Normally PCI device's DMA controller does burst transfers.
You program DMA controller word-by-word (byte-by-byte).

That is: you are looking for processor function. I do not know if one
exist.
But there is no need in processor for that burst if your device does it.

"SlowTransfer" wrote in message
news:86130527-9EE5-43F2-B398-7025CB6A9B6B@microsoft.com...

> Thank you for reading.
> I have a problem in data transfering with PCI Express Device.
>
> When I try to send data using WRITE_REGISTER_BUFFER_ULONG function
> I could send 10 words to my device correctly.
> But data transfer was too slow. So I tried to find out what the
> problem is,
>
> And I figured out that my device receives 10 packets for transfering
> 10 words.
> That's why my device works so slow.
>
> So, I want to ask if there any function which can transfer data in
> burst.
>
> Thank you for your reading. I hope that you have a nice day.
>

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