Data2MEM doesn't initialize bit file correctly

embedded · ‎06-23-2015

Hi,

I am using ISE14.7 tool. I have a mixed ISE,EDK project. I am going to make mcs file so I need to initialize BRAM contents of bit file. I run DATA2MEM command as is described in user manual:

data2mem -bm my.bmm -bd code.elf -bt my.bit -o b new.bit

However, it doesn't change the BRAM contents of new bit file.

I am wondering how I can insert elf file information to my bit file. It seems that neither ISE nor SDK can do it properly.

I would appreciate any help and advice.

Hossein

Thanks,
Hossein

htsvn · ‎06-23-2015

hi

there is a data2mem debugging guide that will be helpful in debugging this problem further.

did you get a chance to look at this? http://www.xilinx.com/Attachment/Xilinx_Answer_46945_Data2Mem_Usage_and_Debugging_Guide.pdf

-hem

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Anonymous · ‎06-24-2015

One quick test to try is to check that the BMM memory location matches what you have in your ELF.

In your data2mem command you are not using a tag, so this will assume you are usng the first block found in the BMM file.

Note: you may just have one anyway, which is fine too.

So, lets assume that this address range goes from 0x00000000 to 0x00001fff. If you dissassemble your ELF file

Note: you can disassemble usng the command below (or open the linker script):

mb-objdump -S path/to/elf/file -d > dump.txt

Check the location where your application is placed in BRAM. this needs to match the range in your BMM file.

Hope this helps?

embedded · ‎06-24-2015

Do I have to use tag microblaze_0 ?

I didn't see any note in this regard in Data2Mem user guide. However, when I look into the SDK log file I see that it uses this tag. What is it used for?

Thanks,
Hossein

Anonymous · ‎06-24-2015

The tag is used to identify what block memory to place the memory into. If you just have one block then you are ok. The tag will be whatever the range is called in the BMM file

feed1885 · ‎09-15-2017

Hi, Hossein

Do you have solved your problem， I have the same question now.

Best Regards.

Pofeng1885

embedded · ‎09-15-2017

Sorry, it's been a long time. I don't remember what kind of workaround I used.

Thanks,
Hossein