System Console & master_write_32 — can't do this while target is running?

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... Any help solving the problem is appreciated....

Thank you!

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I guess you'll have to halt the processor in some way, but I don't know how to do that either.

A simple way that fits you needs of configuring the MAC + PHY is to add a "JTAG to Avalon Master Bridge" component.

It will also show up in the system console like the processor and you can start writing to/reading from your system without halting anything.

Please find below a complete walkthrough:

set path  0]

Be sure you'll catch the JTAG Bridge and not the NIOS. Maybe you'll have to insert a 1 instead of a 0.

If you want to be sure, remove the NIOS completely :D.

open_service master $path

This will link the System Console to your master.

You could perform

is_service_open master $path

to see wether it worked (=1) or not (=0).

Now you're ready to go with

master_write_32 $path 0x12345678 0xdeadbeef

and

master_read_32 $path 0x12345678 1

Hope that helped :)