Spooling from FPGA to the PC

[SneakerNet]

Hi All

We are currently involved in some DSP work where by we need to do further
analysis on the final results.
The final result is 16bits which is being captured at 48kHz.
Currently I am using SignalTap and using this I'm able to capture a max of
8k samples, however this is not enough (as RAM is finite) and I was
wondering is there anyway of real-time spooling this data back to PC?

I'm using Nios Development Board (Cyclone FPGA) and ByteBlaster II.

Pls Advice
Regards

 

[Hal Murray]

The final result is 16bits which is being captured at 48kHz.
Currently I am using SignalTap and using this I'm able to capture a max of
8k samples, however this is not enough (as RAM is finite) and I was
wondering is there anyway of real-time spooling this data back to PC?

That's 960 K bits/second. Some serial cards go that fast.

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[Jan De Ceuster]

The final result is 16bits which is being captured at 48kHz.
Currently I am using SignalTap and using this I'm able to capture a max of
8k samples, however this is not enough (as RAM is finite) and I was
wondering is there anyway of real-time spooling this data back to PC?


That's 960 K bits/second. Some serial cards go that fast.

You can use the parallel port of the computer. in ECP mode. I once reached
4Mbit/sec in an PC to PC communication without using DMA. You can find my
program (Delphi 3.0) when searching for FastTransfer.zip. Well, even EPP should
do it (theoreticaly 2Mbps).

 

[Daniel Leu]

Have a look at FT2232C from FTDIchip.com. It is a simple USB slave
controller that comes with the USB drivers. These drivers provide an
UART com port on your PC. So interfacing this with your application is
really easy.

If your USB bus is not busy with other peripherals, you can get up to
8Mbit/s. So this should be sufficient for your application.

/Daniel

SneakerNet wrote:

Hi All

We are currently involved in some DSP work where by we need to do
further
analysis on the final results.
The final result is 16bits which is being captured at 48kHz.
Currently I am using SignalTap and using this I'm able to capture a
max of
8k samples, however this is not enough (as RAM is finite) and I was
wondering is there anyway of real-time spooling this data back to PC?

I'm using Nios Development Board (Cyclone FPGA) and ByteBlaster II.

Pls Advice
Regards

 

[Peter Seng]

The final result is 16bits which is being captured at 48kHz.
Currently I am using SignalTap and using this I'm able to capture a max of
8k samples, however this is not enough (as RAM is finite) and I was
wondering is there anyway of real-time spooling this data back to PC?

I'm using Nios Development Board (Cyclone FPGA) and ByteBlaster II.

You could use the PC-interface part of our 'dlk' system construction kit,
capable of doing data rates about 400-500 Kbytes/sec via the PC parallel
port.
All components of the ' dlk ' system construction kit including the source
code can be used free of charge for not commercial applications or for
evaluation purposes.

description see: http://www.seng.de/dlk_.html

So if you have enough I/O´s left for implementing a parallel link to the PC,
adapting our sources to Your (Cyclone) needs should do the work.



with best regards,

Peter Seng


#############################
SENG digitale Systeme GmbH
Im Bruckwasen 35
D 73037 Göppingen
Germany
tel +7161-75245
fax +7161-72965
eMail p.seng@seng.de
net http://www.seng.de
#############################

 

[Andrew Dyer]

On Tue, 17 Aug 2004 12:54:58 +1200, SneakerNet wrote:

Hi All

We are currently involved in some DSP work where by we need to do further
analysis on the final results.
The final result is 16bits which is being captured at 48kHz.
Currently I am using SignalTap and using this I'm able to capture a max of
8k samples, however this is not enough (as RAM is finite) and I was
wondering is there anyway of real-time spooling this data back to PC?

I'm using Nios Development Board (Cyclone FPGA) and ByteBlaster II.

This sounds like audio data. How about buying an audio card with
s/pdif in and hooking your DSP to that via the fpga.