basics on jffs2

Thanks Scott,

I have downloaded Microtronix linux uClinux for Nios II 5.0 and compiled mkfs.jffs2 without a problem.

I created a few directories and a file and then I used the following command to generated jffs2.img

$>  mkfs.jffs2 -d jffs2 -e 0x10000 -o jffs2.img -l

then

$>  bin2flash --input=jffs2.img  --base=0x0000 0000 --location=0x0060 0000 --verbose

I used the base=0x0000 0000 because I am using the Altera NIOS CYCLONE II Development Board.

I used the location at 0x0060 0000 because this is in the user region (as per Nios development brd cycloneII Edition Ref. Manual).

User region= 0x0000 0000 to 0x00BF FFFF

I placed it high in the user region but I am not sure where ecos is placed - do you know where I can find this information?

The previous command gives a output of jffs2.flash

I then tried to download jffs2.flash to the board with the following command without succuss.

$>  nios2-flash-programmer --base=0x0000 0000 --input=jffs2.flash --location=0x0060 0000 --verbose --sof=/cygdrive/c/altera/kits/nios2/examples/verilog/niosII_cycloneII_2c35/standard/standard.sof

<div class='quotetop'>QUOTE </div>

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Aug 16, 2005 4:31:49 PM - (FINE) nios2-flash-programmer: nios2-flash-programmer starting

Aug 16, 2005 4:31:49 PM - (INFO) nios2-flash-programmer: args = --base=0x00000000 --input=jffs2.flash --verbose --sof=standard.sof

Aug 16, 2005 4:31:49 PM - (INFO) nios2-flash-programmer: Attempting to read input-data from c:jffs2.flash

Aug 16, 2005 4:31:49 PM - (INFO) nios2-flash-programmer: Launching Quartus Programmer to download:

standard.sof

Aug 16, 2005 4:31:49 PM - (FINE) nios2-flash-programmer: Quartus Pgm launched

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

Info: Running Quartus II Programmer

Info: Command: quartus_pgm --no_banner --mode=jtag --operation=p;standard.sof

Info: Using programming cable "USB-Blaster [USB-0]"

Info: Started Programmer operation at Tue Aug 16 16:31:51 2005

Info: Configuring device index 1

Info: Device 1 contains JTAG ID code 0x020B40DD

Info: Configuration succeeded -- 1 device(s) configured

Info: Successfully performed operation(s)

Info: Ended Programmer operation at Tue Aug 16 16:31:53 2005

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

Info: Processing ended: Tue Aug 16 16:31:53 2005

Info: Elapsed time: 00:00:04

Aug 16, 2005 4:31:53 PM - (FINE) nios2-flash-programmer: SOF programming done. exit code = 0x0000

Connecting with target design

Attempting to resynch with target

Unable to synchronize with target.

Aug 16, 2005 4:31:56 PM - (SEVERE) nios2-flash-programmer: Error opening target hardware

Aug 16, 2005 4:31:56 PM - (SEVERE) nios2-flash-programmer:

In order to program flash, you must first create a purpose-built

flash-programming design (i.e. FPGA configuration) and associate it with

your particular board. The Nios development kit is delivered with purpose-built

flash-programming designs pre-built for several development boards. If you wish

to program flash on your own board, you must first create a flash-programming

design.

The process of creating a flash-programming design for your board is mostly

automated. From a bash-shell, execute this script:

mk_target_board --help

The help-message includes references to other documentation on programming

flash and targeting Nios systems to custom board designs.

- exiting.[/b]

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I am using a pre-built configuration (cycloneII 2c35) so I am not sure why it wants me to use mk_target_board.

Any ideas?

Can you explain further about how to make the jffs2 partition you spoke of previously (see below). Is this the jffs2.img (jffs2.flash) or do I have to do something to make the partition?

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1. Create a jffs2 filesystem

You can create a filesystem image with mkfs.jffs2 and download it to your jffs2 partition.

As an alternative, you can simply erase your jffs2 partition.[/b]

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