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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 don't know if it applies to your system, but on my designs I layout my EPCS flash locations as:

Address 0: Factory SOF

Address (-after Factory SOF): Factory Software

Address 0x500000: Application SOF

Address (-after Application SOF): Application Software

Where -after is done using the --after switch in my programming script (for the NIOS II command shell) Example below:

sof2flash --input=fpga_factory.sof --output=fpga_factory.flash --epcs --verbose

elf2flash --input=software_factory --output=software_factory.flash --epcs --after=fpga_factory.flash --verbose

This is done since the bootloader normally points to the starting address of your .SOF (normally 0, my modified code points to 0x500000). From here it determines the size of your .SOF and seeks to the end to look for your software.

I hope this helps.