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Altera_Forum's avatar
Altera_Forum
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13 years ago

Help with memory initialization

I am having a hard time getting my Nios code to work from bootup. I am using active parallel configuration and my FPGA code loads fine, but the Nios code doesn't load up. I have disabled the JTAG_UAR...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

you can try using EPCS loader to load NIOS code on boot time. We also had some problems with loading NIOS code at boot. What we did is following:

Include EPCS controller in QSYS, change reset vector of NIOS 2 to point EPCS controller. Then, you can use some scripts like elf2flash, sof2flash to create .pof file for flash including both sof and elf files in it. And at boot -what I guess to be happing is- first sof is loaded then EPCS controller loads elf.

Now, you load only sof file, reset is pointing onchip memory, which does not have any meaninful data in it.