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Altera_Forum's avatar
Altera_Forum
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11 years ago

NiosII booting from on-chip memory

I am trying to boot a NiosII (HAL only, no other bigger OS) on a Cyclone IV directly from the on-chip memory. I have initialized the memory .hex file and included it in my project. I then recompiled ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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If you have the nios JTAG debugger enabled I think it 'steals' the reset vector.

Try removing it.

ISTR problems with the JTAG debugger when downloading over PCIe (which is what we do).

I think there is a separate JTAG to avalon master that can be used to access memory - useful for debug.

With the nios soft-reset exposed that could be used for software download.

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I did your suggestion. The same behaviour. The NiosII does not start when the *.sof is downloaded via JTAG. It just hangs.