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Altera_Forum
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13 years ago

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

Hi! In the qsys I have: 1. Clock Source 2. On-Chip Memory 3. Nios II Processor 4. System ID 5. JTAG UART 6. EPCS Serial Flash Controller 7. PIO 8. SDRAM Controller I want to use...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Could you access the EPCS from Nios? Try to write/read the EPCS with the alt_flash functions.

You could verify if the firmware was flashed correct to EPCS. The firmware follows immediately after the fpga design in the EPCS.

To get the start address in EPCS look at the firmware.flash. Its similar a srec file where the first S1, S2 or S3 record contains the start address.

Reading from EPCS:

nios2-flash-programmer --cable='USB-Blaster [USB-0]' --epcs --base=0x21000 --read-bytes <start_address_firmware>+<size_of_nios_firmware> --read epcs.out

Jens