Comments (6)
kosme
commented on June 22, 2024
I have noticed that the library behaves erratically on ESP32 boards when
running at max frequency. The workaround I found is reducing the clock
frequency to the second-highest one.
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blacknull
commented on June 22, 2024
thanks for your reply.
I'm sorry for not make myself clear.
the code works fine on esp8266 and esp32.
but on esp32-c3 which has a risc-v 160Mhz cpu, is 10 times slow than esp32.
I switched the cpu from 160MHz to 120Mhz and 80Mhz, nothing going better but worse.
the function FFT.Compute(FFT_FORWARD) cost most of time.
When I looked into the code in FFT.Compute(), it seemed only sqrt() has heavy duty.
so I run a test for 100 times sqrt(), it took 615us only, not guilty.
then what's going wrong?
thanks.
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HorstBaerbel
commented on June 22, 2024
Try the develop branch.
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kosme
commented on June 22, 2024
@blacknull Is the issue still present on the newer versions?
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Related Issues (20)
- Hann window incorrectly defined
- Alternate Current 50 Hz frequency spectrum HOT 2
- formula for windowing algorithms HOT 9
- An example of implementation HOT 1
- Phase Phase Phase
- Hann window should be corrected
- Inverse Hann not working - or am I missing something?
- Needed Documentation HOT 1
- Needs function to calculate octaves
- Implement C++ template HOT 5
- (improvement) use sqrtf() on ESP32 HOT 2
- Windowing / Weighing Factor HOT 1
- Weird results while imag input other than 0 at example FFT_1 HOT 2
- I thought I was nearly there but can't quite get it over the line. HOT 5
- Updating Documentation and Examples HOT 1
- Performance++ HOT 10
- Needed FFT real time example HOT 1
- average FFT result HOT 1
- calc complex amplitude for only specific frequencies HOT 1
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