boot NIOS from EPCS flash and use SDRAM to store instructions and data

Hi,

you have to store the fpga configuration data and the nios firmware in the EPCS.

I'm using following script:

sof2flash --input="fpga_design.sof" --output="fpga_design.flash" --epcs --verbose

elf2flash --input="nios_firmware.elf" --output="pr4_top_fw.flash" --epcs --after="fpga_design.flash" --verbose

nios2-flash-programmer --cable='USB-Blaster [USB-0]' --epcs --base=<EPCS Addr> fpga_design.flash

nios2-flash-programmer --cable='USB-Blaster [USB-0]' --epcs --base=<EPCS Addr> nios_firmware.flash

In my QSYS the reset vector is pointed to EPCS, the exception to onchip RAM because of faster ISRs.

Verify in BSP Builder that all other sections are mapped to sdram. Then it should work.

Jens