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Altera_Forum's avatar
Altera_Forum
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13 years ago

NIOS II and Cyclone III Remote Update

Have spent several days now searching and reading and think I am nearly there... but not quite. I am using the NIOS II core with SOPC builder. I use Quartus II for the FPGA image. This is a projec...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

I'm not sure, but you probably need to put read_source=01 in order to read the boot register content.

Try IORD(REMOTE_UPDATE_CYCLONEIII_BASE, 0xC)

If this doesn't work either, I believe you have some error in remote update connection to your Nios system.

Please note that Fmax for remote update core on CycloneIII devices is 40MHz which is lower than the common range of system frequency (50 to 100MHz).

So you normally need a lower frequency clock and a clock bridge in your Nios system.