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Altera_Forum's avatar
Altera_Forum
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16 years ago

Using EPCS on power up for uClinux

Hi, I have problems using the epcs as the boot device for the zimage file made with uclinux - the SW . i have followed the instructions here : http://www.nioswiki.com/operatingsystems/uclinu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Erez,

With respect to# 1, the "boot records" are created by elf2flash and reside in EPCS (in your case). The onchip memory which is part of the epcs_controller contains the boot copier code for the Nios II. This is why you point the Reset Address of your CPU (in SOPC Builder) at the epcs_controller component.

I hope that explains it. You have to keep in mind that an FPGA is a "blank slate" prior to being programmed/configured. Once you program it with your SOPC Builder design containing a Nios II processor, the processor will attempt to start fetching code from its Reset Address just after the FPGA is programmed.

Cheers,

- slacker