Hi everyone,

I recently bought a Spartan II 2s200 PCI Board to use in a project.
I programmed it with the Opencores PCI core.  The problem is that when
I plug it in the PCI slot of the computer the board turn on but the
computer doesn't and the computer work well without the PCI board
plugged. Any help? Thanks in advance.

Regards;

Jorge

"stbcasa"
<j...@engin.umass.edu> writes:
> I programmed it with the Opencores PCI core.  The problem is that when
> I plug it in the PCI slot of the computer the board turn on but the
> computer doesn't and the computer work well without the PCI board
> plugged. Any help?

Capture a logic analyzer trace of the PCI bus and see if there's anything
obvious going wrong?  For instance, if the FPGA is driving signals when
it shouldn't.

General things to check:

1. Does your design pin-out (.ucf file) match the board?

2. Does the design meet timing constraints for the bus speed
of your computer?

3. Does the design load fully before PCI reset is released?  This
is often a sticking point.  If you have a computer with a real
reset button you can try to extend power-on reset time on the
PCI bus.  Otherwise you can minimize the FPGA load time by setting
the CCLK rate as high as your PROM can go (in the configuration
options).  Also some motherboards have very short PCI reset times.
If yours does, try a different system.  Usually your best bet is a
generic (e.g. ASUS - not Dell, IBM, Compaq) motherboard which usually
has provisions for PCI reset switch and uses the "power good" output
of the power supply to extend reset to a minimum of 250 milliseconds.
The spec. for PCI is much shorter than this.

Good luck,
Gabor

stbcasa wrote:
> Hi everyone,
>
> I recently bought a Spartan II 2s200 PCI Board to use in a project.
> I programmed it with the Opencores PCI core.  The problem is that when
> I plug it in the PCI slot of the computer the board turn on but the
> computer doesn't and the computer work well without the PCI board
> plugged. Any help? Thanks in advance.
> 
> Regards;
> 
> Jorge