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Question asked by Emrah Duatepe on Oct 28, 2017

Hi friends,
I want to try fft analyze with Matlab to C conversion but I have some question.
First, how can I get values from microphone(STM32F4 Discovery kit using CubeMX Hal library),I think using I2S but an article I have read it says I2S and PDM is read different.Could you give me an offer to do this process with easy way.
Second, how is gonna set the fft how many point (how many value) ,is it related with sample frequency(for instance 48000) it means my fft values that I use is gonna be in 24000 arrays.I am going to take 24000 value to fft().
I am waiting helps.