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Altera_Forum
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13 years ago

Building RBF with SOF and ELF, External SDRAM

Hi All, I am looking for information on how to concatenate a .elf and a .sof file into a single .rbf file. The elf file loads Nios data and instructions into an external SDRAM. Any information/sugges...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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Did You set the reset and exceptions pointers correctly? Also did You correctly generate hex file from elf file?

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I assume that the reset vector should be offset 0 of the on-chip memory. What is the exception vector supposed to be? Right now I have it pointing to the sdram.

I have been using this command to generate the hex file, and have it set in the on-chip RAM to load, and the RAM summary after compilation confirms this:

elf2hex bootloader.elf <on chip ram start in SOPC> <on chip ram end in SOPC> --width=32 --create-lanes=0 --record=4 ../../bootloader.hex