Fast Fourier Transform using the ARM CMSIS Library within the STM32 MCUs

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Steppe School

Күн бұрын

Пікірлер: 22

@michaelalex5235 Жыл бұрын

This is great stuff - thank you and continue the good work!

@steppeschool3629 Жыл бұрын

you are much welcome

@metrogman2409 Жыл бұрын

Thank you for the FFT demo.

@steppeschool3629 Жыл бұрын

you much welcome!

@ArgaAridarma Жыл бұрын

Thank you! I need to try this for my next project.

@steppeschool3629 Жыл бұрын

Thanks!

@padakathu2882 5 ай бұрын

thank you, excellent, very clear explanations

@dasunisaparamadu2876 Ай бұрын

I'm using Cube IDE version 1.15.0. The microcontroller version I'm using is STM32 NUCLEO L073RZ DSP library is not listed under software component class. Which version are you using?

@sizuziledlamini1852 Ай бұрын

Does the stm32f103c8 "Blue pill" support the arm_math library?

@steppeschool3629 Ай бұрын

I am afraid it does not support

@vix_s_hnu 6 ай бұрын

I got error " undefined reference to 'arm_rfft_fast_init_f32'. I imported the DSP library as you mentioned in the other videos. Why i am stille getting the error?

@kamarmeredow7644 Ай бұрын

Thank you for the video. I tried to use this dsp lib with my stm32f103c8t6 cortex m3 with clock speed 64mhz. But i could not install it because bluepill has only 20kb. I wrote recursive fft code myself. but it took almost 70ms to finish and i lost some values from adc. sampling rate was 8khz. and window size is 128 or even with 64 it was still slow. i think arm dsp uses some kind of hardware accelerated things to make the calculations much faster for example in 1-2ms. But i could not use it as bluepill has only 64kb of flash. What can you suggest? Appreciate that thanks.

@steppeschool3629 Ай бұрын

The easiest solution would be to upgrade your microcontroller. Try more powerful microcontrollers, such as STM32F4, STM32L4, etc. They are not expensive and you can easily implement FFT.

@kamarmeredow7644 Ай бұрын

@@steppeschool3629 Hi. Thank you for the answer. Yes i had also F407 with 512kb of flash. But i wanted to try it with 64kb. Because i saw someone got fft working even with atmel processor with good performance. In the end i wrote my fft function with float type which took 70ms to calculate which is very slow. There is no fpu in bluepill. And after working 2 days i rewrote my functions in fixed point numbers and got it working. Fft took 3-4 ms for calculation, flash usage is 34kb with whole code.

@steppeschool3629 Ай бұрын

What you did is quite impressive

@JohnJ-zj8ol 6 ай бұрын

Thanks a lot! what is the rest of line 106? printf("frequency %f: %f ", ((float32_t)(i * SAMPLING_RAT) / FFT_LENGTH), out...

@steppeschool3629 5 ай бұрын

just bracket with a semicolon

@batosato 3 ай бұрын

@@steppeschool3629 It is difficult what is the rest. Is it printf("freq %f: %f ", ((float32_t)(i * SAMPLING_RATE) / FFT_LENGTH), output_fft_mag[i]); ??

@tolpow Ай бұрын

for (int i = 0; i < FFT_LENGTH / 2; ++i) { printf("frequency: %f", ((float32_t) (i * SAMPLING_RATE) / FFT_LENGTH )); printf(" magnitude(float): %f",output_fft_mag[i]); printf(" magnitude: %d ", (uint8_t)output_fft_mag[i]); }