[hpsdr] [dttsp-linux] Re: ATOM based micro board

[Neal Campbell]

Have you seen what is probably the future direction of SSDs? I just
read a news report where they are headed towards dropping the
traditional HD interface technology and going directly to the PICe
buss in order to obtain the 30x data transfer speed they deliver/


Neal Campbell
Abroham Neal Software
Programming Services for Windows, OS X and Linux
www.abrohamnealsoftware.com
(540) 242 0911




On Sat, Feb 7, 2009 at 11:40 AM, jeff millar <jeff at wa1hco.net> wrote:
> I've been looking at PCI Express for SDR. The slot in the PC has some
> extra signals such as card presence detect and SMB bus but all that's
> really necessary is the Tx/Rx high speed serial pairs.
> http://pinouts.ru/Slots/pci_express_pinout.shtml
>
> Altera has just announced a low cost line of FPGA's, Arria 2 GX with
> built in PCI-Express serial interfaces implemented in hard silicon, no
> logic elements consumed in the core function.
> http://www.altera.com/b/arria-ii-gx-transceiver.html
>
> The PCI industry group has defined an external cable interface for PCI-e
> and some products exist, such as Cable adapter
> http://www.innovative-dsp.com/products.php?product=PCI%20Express%20X1%20Cable%20Adapter
>
> The advantages of PCI-e over USB or Ethernet, at least to me
> - memory mapped programming model, easier access to control registers
> - (compared to a packet protocol programming model)
> - CPU's DMA engine can move data with little software
> - Growth to 2x, 4x, 8x, 16x bandwidths
> - Operating System interfaces designed for extremely high bandwidth
>
> The Altera announcement changes the game significantly and enables low
> cost SDR on PCI-e.
>
> jeff, wa1hco
>
> Rob Frohne wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi Everyone,
>>
>> Frank's comments below prompt me to ask, what we could gain by
>> investigating how to overcome this straw problem? Would a Mercury like
>> card plugged into a PCI slot allow us to speed things up
>> significantly? Or does it need to be a PCI-Express slot? What can be
>> gained opening up the bottleneck of USB or firewire? Are there
>> applications that would benefit from this, or is the "straw" between
>> the computer and our brains such that fixing the USB/Firewire straw
>> doesn't buy us much? Should we be thinking of HPSDR 2?
>>
>> 73,
>>
>> Rob, KL7NA
>>
>
>
>
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