Description

set_property BMM_INFO_DESIGN {top_level.bmm} [current_design]

write_bmm top_level_bm.bmm

CRITICAL WARNING: [Memdata 28-127] data2mem failed because the ADDRESS_SPACE specification is incorrect or empty. Check the bmm file or the bmm_info_* properties. The design BRAM initialization strings have not been updated.

ERROR: [Common 17-69] Command failed: Failed to create a merged bmm file.

Solution

Non processor based designs are not supported by the current code.  

This is something, however, that is on the roadmap for a future release.

For now, if you are using the BMG you will have to manually create the BMM file using the below steps:

1) Open the BMG XCI file and look at the summary:

 Here you can see that the BRAM resources are 4 x RAMB36s.

If you open the implemented design and do a Ctrl+F you can find your BRAMs:

In the example above, this BMM file would look like:

The mem file contains the following:

To verify this you can generate the bitstream, using the commands below:

data2mem -bm test.bmm -bd test.mem -bt test.bit -o b updated.bit

data2mem -bm test.bmm -bt updated.bit -d > dump_mem.txt

If you open the dump_mem.txt file you can see that the memory is populated. 

For example:

Since we are using the RAMB36, this uses the parity bits. 

To figure out the parity bits:

The first two bits are discarded. 

The second two bits are the parity bits seen below: