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JWall40's avatar
JWall40
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6 years ago

No output from FFT IP

I am trying to perform a FFT on a single 1024 sample frame, using streaming architecture. However, I cannot get source_valid to go high or any output. Here's my signal tap 4k samples Start of...
omerc's avatar
omerc
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4 years ago

Dear @CheePin_C_Intel ,

I did not fully get the implications of using the block floating point and fixed point and the difference of the consequences of using them. I get a working and erroneous implementation by using the fixed point variable streaming and block floating point streaming configurations of the FFT IP. the problem is explained in the following thread:

https://community.intel.com/t5/FPGA-Intellectual-Property/FFT-Intel-FPGA-IP-altera-fft-ii-unexpected-source-error-missing/m-p/1406713#M26100

Do you have any idea why would block floating point could generate an missing_sop error in such a design where fixed point do not?

I would much appreciate if you can help me with this issue.

Best Regards