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
