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Altera_Forum
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12 years ago

DE0 Nano with SDRAM and EPCS not loading firmware

I have configured the DE0 Nano with a SDRAM, EPCS, and ALTPLL combo that phase shift the SDRAM clock -3ns as required. When I use the flash programmer it completes flashing successfully, restarting t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I have now configured the DE0 nano in Qsys with SDRAM and on-chip memory, I'm using Nios II/e CPU with on-chip memory as the reset vector memory, and exception vector memory. So i'm expecting system use the on-chip memory to run firmware and have the sdram available as extra ram. But after flashing it wont load firmware. Is it some how expecting to run from SDRAM?

The BSP sets the sdram as the linker target for exception_statck_memory_region_name, and interrupt_stack_memory_region_name automatically, the .heap and .stack liner section points to sdram also. is this causing the problem?

This of runs fine with I run as Nios II hardware configuration, just does not boot firmware after flashing.