Hello sir.

I'm a relative newbie with rfnoc to build X310 loads so I may have missed 
something, but if so, I can't find what it is.

After successfully making many HG builds (one 1GbE link, one 10GbE link),  I 
reached a point where I needed higher X310 to host bandwidth so switched to 
making XG builds for the X310 with two 10GbE links with the following:
./uhd_image_builder.py fft ROMsiggen keep_one_in_n -I 
~/rfnoc/src/rfnoc-X310ROMtx/ -d x310 -t X310_RFNOC_XG -m 5 --fill-with-fifos

This worked well and I was then able to communicate to the X310 over a 10GbE 
link on port 0, but when I wanted to make an HG build again with the same HG 
command used previously, Vivado failed with fatal errors about unassigned 
physical pins when I used the following:
./uhd_image_builder.py fft ROMsiggen keep_one_in_n -I 
~/rfnoc/src/rfnoc-X310ROMtx/ -d x310 -t X310_RFNOC_HG -m 5 --fill-with-fifos

I found that when making XG builds, at least one constraints file, including 
x300.xdc in ~/rfnoc/src/uhd-fpga/usrp3/top/x300 was changed to reassign 
physical pins on the ethernet links but was not changed back when I later tried 
to make an HG build again.
I was able to work around the problem by restoring the x300 constraints files 
to their original versions but it would be nice if the build scripts did this 
automatically. Assuming this is not due to an error on my part, is there any 
planned update for this?

OS: Ubuntu 16.04
SW: Vivado HLS 2015.4


Thanks,

John McGinn
Cognitive Systems Corp.
Waterloo, Canada



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