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Problem with arm_rfft_q15 in STM32F407

Question asked by Ali H. on Feb 6, 2014
Latest reply on Feb 8, 2014 by fm
I have a problem in using arm_rfft_q15. When I use this instruction in my application, some of buffers in my application were changed. I defined all other variables globally. In my application, I want to perform 512-Point FFT conversion. Definitions and code are as below:

arm_rfft_instance_q15  S;
arm_cfft_radix4_instance_q15  S_CFFT;
signed short FFT_Input[1024];
signed short FFT_Output[512];
arm_rfft_init_q15(&S, &S_CFFT, 512, 0, 1);
arm_rfft_q15(&S, FFT_Input, FFT_Output);