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Altera Nios II & PCI Compiler 4.1.0 Question

Hi,

I'm using SOPC Builder and added some components, including NIOS II, external RAM and a PCI Host-Bridge (PCI Compiler 4.1.0). Is there, by coincidence, a reference design available of a system using Nios II and the PCI Compiler together? I know there is a reference design in the PCI Compiler User Guide, but it doesn't use the Nios II processor, which I really need in my design.

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?

Thanks,

Sander Odekerken

Reply to
Sander & Stieneke Odekerken
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want to know if it

or can

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.

Reply to
Nial Stewart

The whole system is intended for a quick check if self-made PCI devices work.

The goal is to use Nios as the Host processor and to use a PCI Host-Bridge to interface Nios to the PCI bus. The board should be working without a PC (standalone). This means that the Nios core is the only bus master in the system and should do the configuration cycles etc. in software. You can interpret this as if I'm making my own mini motherboard, only using PCI.

The software running on the Nios core should walk down the PCI bus to detect any attached device and do the rest of the configuration and other read/write cycles.

Sander

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Reply to
Sander & Stieneke Odekerken

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