FFT C2H tutorial Not Working

[Altera_Forum]

Hi All, 

 I have a specific case where in the tutorial doesnt work. Does anyone have a clue what could have gone wrong and how to rectify it .   Error Log : FFT Benchmark Starting (this will take up to 20 seconds) - Running 1000 iterations for both software and hardware. - Each iteration runs a 256 point radix 2 FFT transformation.  Accelerated FFT is incorrect Error at index 0, received 52 0i, expected -244 0i --Performance Counter Report-- Total Time: 6.67832 seconds (333915759 clock-cycles) +---------------+-----+-----------+---------------+-----------+ | Section | % | Time (sec)| Time (clocks)|Occurrences| +---------------+-----+-----------+---------------+-----------+ |Software Only | 93.9| 6.27272| 313636207| 1| +---------------+-----+-----------+---------------+-----------+ |HW Accelerated | 6.04| 0.40352| 20175989| 1| +---------------+-----+-----------+---------------+-----------+  The software only output data is correct      Definitions :  # define BufferRAM1 (alt_16 *)0x2000# define BufferRAM2 (alt_16 *)0x4000# define BufferRAM3 (alt_16 *)0x6000# define BufferRAM4 (alt_16 *)0x8000# define BufferRAM5 (alt_16 *)0x3000# define BufferRAM6 (alt_16 *)0x5000# define CosRAM (alt_16 *)0xA000# define SinRAM (alt_16 *)0xB000  I am attaching the ScreenShot of my SOPC builder.  Hopefully someone could take a look at this one and let me know the details.   Cheers, Ittiam

[Altera_Forum]

For the accelerator optimized FFT, I get the result as below: - 

 nios2-terminal: connected to hardware target using JTAG UART on cable nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0 nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)   FFT Benchmark Starting (this will take up to 20 seconds) - Running 1000 iterations for both software and hardware. - Each iteration runs a 256 point radix 2 FFT transformation.   --Performance Counter Report-- Total Time: 2.18095 seconds (290792861 clock-cycles) +---------------+-----+-----------+---------------+-----------+ | Section | % | Time (sec)| Time (clocks)|Occurrences| +---------------+-----+-----------+---------------+-----------+ |Software Only | 98| 2.13722| 284962337| 1| +---------------+-----+-----------+---------------+-----------+ |HW Accelerated | 1.99| 0.04344| 5792204| 1| +---------------+-----+-----------+---------------+-----------+   The software only output data is correct The hardware accelerated output data is correct    nios2-terminal: exiting due to ^D on remote   you may clean the project and rebuild again.   By the way, the definitions for the accelerator optimized FFT I build is as below: -   #define BufferRAM1 (alt_16 *)0x0000 #define BufferRAM2 (alt_16 *)0x0200 #define BufferRAM3 (alt_16 *)0x0400 #define BufferRAM4 (alt_16 *)0x0600 #define CosRAM (alt_16 *)0x0800 #define SinRAM (alt_16 *)0x0A00     Regards, syleow