Programming Board Flash

Can't seem to find any documentation on what to set the offset to, or the details on how it works. Does the offset designate a region in the flash for the FPGA hardware configuration, leaving the lower addresses for programmable memory? We have tried a bunch of different offsets, and had no luck. The .sof file is 465KB and the .flash is 1,188KB. We tried using a value of 0x1220A0 which corresponds to the .flash size. Also tried 0x200000 and 0x300000 and several values between. Any information on how the offset works would be good.

THANKS!

Here is a dump of the console with an offset of 0x1220A0:

# Creating .flash file for the FPGA configuration

"$SOPC_KIT_NIOS2/bin/sof2flash" --offset=0x1220A0 --input="C:/DE1/DE1_demonstrat

ions/DE1_NIOS/DE1_NIOS.sof" --output="DE1_NIOS.flash"

Info: *******************************************************************

Info: Running Quartus II Convert_programming_file

Info: Command: quartus_cpf --no_banner --convert C:/DE1/DE1_demonstrations/DE1_N

IOS/DE1_NIOS.sof DE1_NIOS.rbf

Info: Quartus II Convert_programming_file was successful. 0 errors, 0 warnings

Info: Allocated 43 megabytes of memory during processing

Info: Processing ended: Fri Feb 02 09:41:51 2007

Info: Elapsed time: 00:00:03

# Programming flash with the FPGA configuration

"$SOPC_KIT_NIOS2/bin/nios2-flash-programmer" --base=0x00000000 --cable='USB-Blas

ter [USB-0]' "DE1_NIOS.flash"

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00

Resetting and pausing target processor: OK

: Checksumming existing contents

00120000 : Reading existing contents

00130000 : Reading existing contents

00140000 : Reading existing contents

00150000 : Reading existing contents

00160000 : Reading existing contents

00170000 : Reading existing contents

00180000 : Reading existing contents

00190000 : Reading existing contents

Checksummed/read 37kB in 1.1s

00120000 ( 0%): Erasing

00130000 (12%): Erasing

00140000 (25%): Erasing

00150000 (37%): Erasing

00160000 (50%): Erasing

00170000 (62%): Erasing

00180000 (75%): Erasing

00190000 (87%): Erasing

Erased 512kB in 4.1s (124.8kB/s)

00120000 ( 0%): Programming

00130000 (12%): Programming

00140000 (25%): Programming

00150000 (37%): Programming

00160000 (50%): Programming

00170000 (62%): Programming

00180000 (75%): Programming

00190000 (87%): Programming

Programmed 476KB +36KB in 10.5s (48.7KB/s)

Device contents checksummed OK

Leaving target processor paused

# Creating .flash file for the project

"$SOPC_KIT_NIOS2/bin/elf2flash" --base=0x00000000 --end=0x3fffff --reset=0x0 --i

nput="Media_Center_X.elf" --output="cfi_flash_0.flash" --boot="C:/altera/61/ip/n

ios2_ip/altera_nios2/boot_loader_cfi.srec"

# Programming flash with the project

"$SOPC_KIT_NIOS2/bin/nios2-flash-programmer" --base=0x00000000 --cable='USB-Blas

ter [USB-0]' "cfi_flash_0.flash"

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00

Resetting and pausing target processor: OK

: Checksumming existing contents

00000000 : Verifying existing contents

Checksummed/read 1kB in 0.0s

Erase not required

00000000 ( 0%): Programming

Programmed 1KB in 0.0s

No change to device contents

Leaving target processor paused