Question:
How to create twiddle factor table in SHARC-FX, and is there any documentation available?
Answer:
The SHARC-FX function does not use a temporary array. The SHARC-FX function uses radix-4 algorithm.
Detailed instructions and format specifications for generating twiddle factor tables are provided in the DSP Library Reference Manual (DSP_Library_Reference.pdf) which is available in CCES installation path C:\analog\cces\3.0.x\Xtensa\Docs
Refer Chapter “2.13.1: Twiddle Factor Table Generation for FFT Routines” for more details on the twiddle table format.