Re: Altera Nios II & PCI Compiler 4.1.0 Question
- From: "Nial Stewart" <nial@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 12 Apr 2006 09:25:09 +0100
"Sander & Stieneke Odekerken" <sanderA_en_stienekeB@xxxxxxxxxxxx> wrote in message
news:443be5db$0$117$dbd4d001@xxxxxxxxxxxxxxxxxx
Another problem I'm facing is that I can't read/write any information
from/to the configuration space of the internal PCI master/target device or
any other (external) PCI device (actually I didn't tried that because I first want to know if it
works before I blow up the device :-) ). Should configuration be done in VHDL or can
it be done in software? If it is possible using software, do I have to write
to the Avalon bus or directly to the PCI Bus Access slave port? Do you have
any examples or reference of how to do a configuration by software?
Sander,
I presume this is so you can insert a board with a NIOS core into a
system that has a PCI bus?
The configuration registers are normally initialised by whatever's driving
the PCI bus.
As an example in a PC when it boots up it walks down the PCI bus detecting
devices and allocating memory addresses etc to them. You probably shouldn't be
trying to write to these from the other side of the PIC interface.
Nial.
.
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