AnsweredAssumed Answered

FFT on STM32F4

Question asked by nguyen.nhan.002 on Oct 8, 2014
Latest reply on Oct 9, 2014 by nguyen.nhan.002
Hi,

Iam trying to use DSP lib on STM32F4 chip. I run the example project of FFT on CMSIS lib and it's ok:

an float array ==> FFT ==> result   it's ok.

But I try on my board:

Signal generator => external ADC => FFT on STM32F4 => result 

it's wrong and when I change input signal (sine 1Khz, 2Khz, 3Khz...), the result didnot change. 
The difference between 2 program is the input of example project is an float array, but other is signed short int array. Am I wrong in this step? Please show me the solution.
Any help will be appreciated, Thanks in advance.

Regards,
Nhan



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