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STM32F10xxx DSP library FFT algorithm

abhishekmathur
Associate

‎2011-10-11 03:34 AM

Posted on October 11, 2011 at 12:34

Hi,

I am using STM32F10xxx DSP library (not the CMSIS DSP)algorithm for calculating FFT of an input sequence.

I want to know the order in whcih the input samples is expected by this algorithm and the order in which the output is given, For eg:

If FFT of x[0] is X[0]

so if I give input as x[0],x[1],x[2],x[3] . . .

then will I get output as X[0],X[1],X[2],X[3] . . .

ie. input in natural orde and output in natural order

ie. the algorithm has inbuilt bit reversal implemented.

OR the input and output should be in any other order.

Also,

I want to know that if by any means I can generate twiddle factors of my own then can I use the

64 point, 256 point and 1024 point algorithms for calculating FFT at higher points say 2048.??

#dsp-stm32f10xx-library
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5 REPLIES 5
infoinfo989
Associate III

‎2011-10-11 10:10 PM

Posted on October 12, 2011 at 07:10

You might find this interesting:

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Complexreal, 1632bit, radix42 FFT, windowing, sqrt and magnitude library&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=1762

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abhishekmathur
Associate

‎2011-10-12 12:43 AM

Posted on October 12, 2011 at 09:43

Actually , my question is specificaly for the DSP library provided by STMicroelectronics.

Manual:

http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/USER_MANUAL/CD00208762.pdf

Different libraries implement algorithm in different ways . I am using the one provided by ST.

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satishkumars
Associate

‎2013-03-04 12:03 AM

Posted on March 04, 2013 at 09:03

Hi Abhishek how did you implemnt the algorithm finally even i am to stuck in the same state what you were. Did you come to know the format for the input and output ?

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denis
Associate II

‎2013-10-09 05:57 AM

Posted on October 09, 2013 at 14:57

question, where the heck is this library ?

STM32F10x DSPLib

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