Closed davidallenmann closed 1 year ago
davidallenmann
commented
2 years ago I went back to v4.4. I got a similar result when I built without configuring PSRAM and clock speed. I changed the clock speed to 240 MHz and configured Octal SPIRAM, and the example now works correctly.
davidallenmann
commented
2 years ago Switched back to v5.0 Configured PSRAM and changed clock speed to 240 MHz. Still get same result with bad output.
dmitry1945
commented
2 years ago Hi @davidallenmann ,
I will look today and will try to reproduce.
Thanks for report.
dmitry1945
commented
2 years ago @davidallenmann The problem was aligment allocation of table for FFT. I have fix the error in local repo and will soon push it to github, but if you need changes now please do follows in file In file modules/fft/float/dsps_fft2r_fc32_ansi.c:
dsps_fft_w_table_fc32 = (float *)malloc(table_size * sizeof(float));
to
dsps_fft_w_table_fc32 = (float*)memalign(16, sizeof(float) * table_size);
That will solve your problem.Regards, Dmitry
davidallenmann
commented
1 year ago Thanks for the fast response. That fixes it!
Environment
Problem Description
FFT example builds and runs on ESP32-S3 using latest V5 IDF, but it generates erroneous output. No changes were made to this example: https://github.com/espressif/esp-dsp/tree/master/examples/fft
Expected Behavior
Plots like shown in readme with single or double peak.
Actual Behavior