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HardFault when doing FFT

I am making a program that samples a signal, does a fft on the signal and sends the signal over can. I am using a STM32F446ZE with Keil for the programming.

I have a problem that the program crashes to the hardfault handler when the fft is doing a bitreversal. I am not so steady on Keil that i can pinpoint the assemblyline that causes the crash.

I am using the CMSIS DSP package to do the fft, although the problen was also present when using KISSFFT.

Does anyone here have any tips or solutions to my problem?

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0 Vegard Havellen over 9 years ago

For more info here is the parts of the code with the FFT:

arm_rfft_fast_f32(&fftInst, ADC_Buffer, fft_Buffer,0 );

the variables:

float32_t ADC_Buffer[ADC_BUFFER_LENGTH];
float32_t fft_Buffer[ADC_BUFFER_LENGTH/2+1];

and the includes:

#define ARM_MATH_CM4
#include "stm32f4xx_hal.h"
#include "arm_math.h"
#include "math.h"
#include "arm_const_structs.h"

ADC_Buffer is filled from the adc with dma

Reply

0 Vegard Havellen over 9 years ago

For more info here is the parts of the code with the FFT:

arm_rfft_fast_f32(&fftInst, ADC_Buffer, fft_Buffer,0 );

the variables:

float32_t ADC_Buffer[ADC_BUFFER_LENGTH];
float32_t fft_Buffer[ADC_BUFFER_LENGTH/2+1];

and the includes:

#define ARM_MATH_CM4
#include "stm32f4xx_hal.h"
#include "arm_math.h"
#include "math.h"
#include "arm_const_structs.h"

ADC_Buffer is filled from the adc with dma

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