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ADC to FFT help

Question asked by jonas.wee on Jul 6, 2016
Latest reply on Jul 7, 2016 by AvaTar
Hi, I am very new to Stm32 and i am currently using the stm32f429 discovery board. I was given a task to feed the ADC data which the signal is obtain from a signal generator into FFT to analyse the signal in frequency domain. I am using a sampling frequency of 8Khz.

I really need help in this as i am very confuse on how it works. Do i need to use a timer to trigger ADC conversion every 8000Hz or  do i use DMA to store ADC data up to 8000hz then transfer to FFT. 

I am also very confuse on why is interrupt being used.

Please help me out here.