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raggedstone pci core
by Unknown on Jun 13, 2007 |
Not available! | ||
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I am trying the opencores pci core from
http://www.opencores.org/projects.cgi/web/raggedstone/overview> on a
raggedstone1 board with a spartan xc3s1500 on board.
I slightly modified the makefiles [*], but this doesn't seem to do the
trick. That is, I can load the driver, but the pc freezes immediately
after loading the driver (i.e.~the device_probe() function returns
succesfully, but then the system locks up completely).
In the raggedstone1 faq I found this
"OPENCORES BASED PCI DESIGN HANGS PC" - First check the issue
above. If the mod is applied another reason that a PC hangs is the the
REQ# line is in it's active state permanently. Some Opencores designs
have not supported this line but it should be parked into a high level
either with a FPGA pullup or drive to '1'. Failure to do this make a
lock up of the PCI with the Raggedstone1 being granted the bus and
never releasing it to other bus masters.
I tried adding a signal req to the pci2wishbone bridge core and put
that permanently to one, but that didn't improve things.
Neither did it help to declare the req signal as PULLUP in the pin
assignment.
Now I was wondering (being a complete FPGA/VHDL newbie), is there
anything besides the Makefiles I should port to get things operational
on the 1500k spartan?
Thanks for any advice,
Klaas Gadeyne
[*] For the record:
root at einstein:~/CVS/raggedstone #
cvs diff Makefile
Index: Makefile
===================================================================
RCS file: /cvsroot/anonymous/raggedstone/Makefile,v
retrieving revision 1.1
diff -r1.1 Makefile
9a10,12
FPGA := xc3s1500-fg456-4
# FPGA := xc3s400-fg456-4 33c36 $(PROJECT).ucf -p xc3s400-fg456-4 $(PROJECT).ngc $(PROJECT).ngd &> tmp/build.ngdbuild.log ---
ngdbuild -intstyle ise -dd "$(PWD)/_ngo" -nt timestamp -uc
$(PROJECT).ucf -p $(FPGA) $(PROJECT).ngc $(PROJECT).ngd &> tmp/build.ngdbuild.log 38c41 100 -o $(PROJECT)_map.ncd $(PROJECT).ngd $(PROJECT).pcf &> tmp/build.map.log ---
map -intstyle ise -p $(FPGA) -cm area -pr b -k 4 -c 100 -o
$(PROJECT)_map.ncd $(PROJECT).ngd $(PROJECT).pcf &> tmp/build.map.log
root at einstein:~/CVS/raggedstone #
cvs diff pci_7seg.xst
Index: pci_7seg.xst
===================================================================
RCS file: /cvsroot/anonymous/raggedstone/pci_7seg.xst,v
retrieving revision 1.1
diff -r1.1 pci_7seg.xst
7c7
-p xc3s1500-4-fg456
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