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Altera_Forum
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16 years ago

Flash programming for DE2-70

Hello Friends, This is a common problem here in the forum. However, Ihaven't been able to make heads nor tails out of it. I'm trying to program the sof file by EPCS and the OS in the CFI Fla...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

This is great info for us DE2-70 users (who are often neglected in tutorials and configuration instructions).

I couldn't get uClinux booting either using my project that's based on the DE2_70_NET example. I finally got it when I read post# 6 which brought me to the conclusion that I had to tell the kernel image I wanted to run from SDRAM not CFI. I was really racking my brain on that.

So a couple highlights I want to point out about my configuration:

1) Needed tell 'make vendor_hwselect...' to run kernel from SDRAM. Running from CFI causes uClinux to not boot.

2) Reset vector in SOPC builder is set to base of my CFI flash.

3) I didn't touch the Exception Vector (still in onchip_mem) at offset 0x20.

4) I kept my config.c as default. I may come back to this and find out what effect it really has on uClinux. If it does double the amount of flash uClinux can see I'll change it. For now, everything works fine.

When the project I'm working on is done and I have some time to mess around some more, I hope to update many of the articles I've come across with information that will help DE2-70 users strugling to figure things out.