I found the error.
A Xilinx Accumulator block was configured with a number of bit less
than the input width (just a typo), the update diagram do not report a
warning/error message and the compilation went ahead till the timing
check. The system.twx file in this case was missing.
Thanks to all,
C
mmm yes I think that's the problem, I have read the system generator
reference manual at the delay block page and should be definitely a
problem to have big delay coupled with big data bus width.
Thanks,
I will try i a different way and will report the improvements (hopefully).
Andrea
2013/10/2 A
Thanks Jack,
can be a z^-2048 delay??
Andrea
2013/10/2 Jack Hickish :
> Hey Andrea,
>
> I think (http://www.xilinx.com/support/answers/23165.html) the ngc
> file is all you're going to get, unless you run the compile again with
> the XIL_TIMING_ALLOW_IMPOSSIBLE variable set to 1.
>
> Your error
Hey Andrea,
I think (http://www.xilinx.com/support/answers/23165.html) the ngc
file is all you're going to get, unless you run the compile again with
the XIL_TIMING_ALLOW_IMPOSSIBLE variable set to 1.
Your error is some specific component that has impossible timing
constraints -- it's not just ge
I'm sure, the directory is correct, because I do that very often, but
in this case the system.twx is really missing. The only file readable
from the timingan is a ngc file but I don't know how to investigate
timing with that.
Can be an issue related to the ADC or some resources ended? This is
the
> Hi all,
>
> I'm compiling a model file for ROACH1 but I have to solve some timing
> constraints which are not met. Unfortunately, the system.twx file to
> be opened with the timing analyzer which should be found in
> XPS_R..BASE/implementations/ is missing.
Hmm. If it got as far as the snapshot
The timing was so bad that it didn't get beyond the mapping stage.
Follow the instructions in the error message:
"Please use the Timing Analyzer (GUI) or TRCE (command line) with the
Mapped NCD"
so run the $XILINX/settings64.sh and then timingan and use the "open
design" option to open the system_
Hi all,
I'm compiling a model file for ROACH1 but I have to solve some timing
constraints which are not met. Unfortunately, the system.twx file to
be opened with the timing analyzer which should be found in
XPS_R..BASE/implementations/ is missing.
Do you have an idea?
Cheers,
Andrea
Running d
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