CCS/TMDSEVM6678: FFT example - almost doing right

Hi,

I've notified the RTOS team. Their feedback will be posted here.
In the mean time, please post the SDK & CCS version you're using.

Best Regards,
Yordan

Hi Yordan

the versions are:

mcsdk_2_01_02_06

ccs 5.5.0

Best Regards,

Nivaldo

Nivaldo,

I've notified the RTOS team. Their feedback will be posted here.

Best Regards,
Yordan

Please post your testcase or explain what the plots represent. I can see that you are doing fixed point FFT but what do the plot represent.

One plot if the single sine wave and it`s FFT what is the single Time -1 plot? It looks like superimposed plots of mixed sine waves.

Regards,

Rahul

HI Rahul

The single Time - 1 plot is the module from out_32x32  ----> DSP_fft32x32(w_32x32, NPT, in_32x32, out_32x32); 

I have one plot to sin wave in 100Hz  represented by y var. The y2 in not used until now to perform FFT.

Magnitude - 0 is FFT from CCS Tools  to y input

So this graph appears some noises, I belive that here is a problem.  I my idea the single Time - 1 and Magnitude - 0 should show the same plot.

If the both grafics the I can do the IFFT and give the original values. In the future I want to use 2D FFT, but I need 1D before.