10-21-2013 03:24 AM
I am trying to implement two MB cores in Spartan 3A FPGA .
I tried to implement processing of both the frames in a single MB core but time taken by MB to do this is more than incoming frame rate. Therefore trying to implement processing of two frames in two different MB cores. No data sharing b/w cores are required i.e two independent cores are to be implemented.
However when I tried to instantiate two cores in ISE project displays WARNING MSG:-"Multiple instances of XPS module Embedded_MB have been detected. Only one instance of XPS module is allowed"
My question is : Is only one core of MB can be used ? if no than what are the steps required to implement two MB cores?
I would appreciate any weblink/ documents discussing the same.
10-21-2013 11:26 AM
Yes, there is a limitation in the older versions of the ISE that only allow one xps be added. You can add the Netlist file instead to workaround this? The netlist will be in the implementation folder of the EDK project
10-21-2013 11:13 PM
Ok as you suggested, instead of using .Xmp file I used .ngc file for MB core. However during the implementation translate fails with below error: ( A full translate report is attached.)
ERROR:ConstraintSystem:59 - Constraint <NET
found. Please verify that:
1. The specified design element actually exists in the original design.
2. The specified object is spelled correctly in the constraint source file.
I suspect this may be because of both the instances of MB cores trying to use same DCM , pl correct if i am wrong.
However I am not able to resolve the issue since I am not certain about cause. Please help me to resolve the problem in full.
PS:- I am using ISE 11.5.
10-22-2013 01:22 AM
10-22-2013 02:41 AM
Ok so I could generate the bit file follwoing your help, However to do this I had to perform follwoing tasks:
However MB cores are not loaded with .elf files after loading the .bit file to FPGA. I.e bit file is not updated with .elf information.
Tried follwoings but failed:
1. Tried updating .bit file using UPDATE BITSTREAM WITH PROCESSOR DATA Option in ISE(which is a usual method while using single core .xmp file) ERROR:- could not find the XPS module associated with this design
2. Added .elf file into project and tried to generate bit file .ERROR:- Bit file generation failed.
Can you help me to short out this last problem.
10-22-2013 09:14 AM
You cant use the associate ELF without the XMP file. If you want to init the bram, then you will have to run data2mem from the command line.
data2mem -bm system_bd.bmm -bd hello_world.elf -bt system.bit -o b download.bit
Note: you only have to add one submodule as a netlist, the other can be left as an xmp file