On 09/19/2013 03:14 PM, Andrew Martens wrote:
Hi Paul
Sorry Andrew, I can't seem to find any of the alternatives you
recommended.
We're using xlinx 14.3, and our mlib_devel's most recent commit was
May of this year.
Thanks again
Your version of Xilinx should be ok. You may want to do a git pull
from casper-astro.
Thanks. I'm not sure I'm free to do that, since a number of us are
sharing the same environment. But I'll look into it.
Can you compile other designs e.g the tutorials? Is the compile
problem specific to the sincos block?
Yes, it's very specific to this particular block.
Regards
Andrew
On 09/19/2013 11:41 AM, Paul Marganian wrote:
Thanks Andrew,
I'll look into those other blocks.
The problem happens at compile time.
Paul
On 09/19/2013 09:45 AM, Andrew Martens wrote:
Hi Paul
I've recently been having problems with the Casper DSP sincos
block. I'll successfully run a number of simulations, then I
start getting these errors at compile time:
Error in 'test_sin/sincos1
<matlab:open_and_hilite_system%20%28%27test_sin/sincos1%27%29>':
Initialization commands cannot be evaluated
Error evaluating parameter 'initVector' in 'test_sin/sincos1/rom0
<matlab:open_and_hilite_system%20%28%27test_sin/sincos1/rom0%27%29>'
Subscript indices must either be real positive integers or logicals.
The only way to get away from this error seems to be shutting down
both the model *and* restarting matlab again. After a few new
simulations however, the problem comes back up, slowing down my
workflow considerably. Any ideas?
Does the problem only happen at compile time or also during
simulation?
You can also try the cosin block from the Downconverter subsection.
It is more sophisticated in BRAM saving and is used in the FFT
library for coefficient generation (so should work).
Depending on your application you may also look at using the
feedback_osc block which generates a cos/-sin pair using
multipliers instead of using a lookup table. It can only generate
in-order values though, not in arbitrary order as the sincos/cosin
blocks do. The feedback_osc is also used in the fft family so
should work.
Regards
Andrew
