5 replies to this topic

[bethel]

Hello.

I am having trouble running the floating point fft in the examples program. When I run the simulation, I get valid numbers printing out, such as xxx+yyyi. But, when I run it on the Virtex II Pro, and I print the results, all the results are 0.

In case there was an error with the printing, I perform a simple check: if (re == 0) print("Re is Zero");, and I always get the RE is Zero message.

At the end of the program, the message 0 errors still prints out too.

Any ideas on what I could be doing wrong? Or is there any other way to verify that it is working at all?Thanks.

-Brianna

[RalphBodenner]

Hi Brianna,

We can better diagnose the problem if we can reproduce it using your project files. Could you please send your Impulse C project files (source and .icProj) and your XPS project files to us at support(at)impulsec.com? What board are you using?

Regards,
Ralph

[bethel]

Ralph,
The board I am using is the Xilinx XUP-V2P board with a Virtex II Pro. Here is a link that has an overview of the board:
http://www.xilinx.com/univ/xupv2p.html

I am also using Xilinx Platform Studio 8.2.02i

For the source code, I am using the unmodified example for the floating point fft that comes with the Impulse download. For the project options, I select the following:

Platform Support Package: Xilinx Virtex-II Pro PLB (VHDL)
Additional Optimizer options: -reduction
Include Floating Point library

and the rest of the options (besides the directories are left blank)

I have sent you guys the The Impact project as well as the pcore that is generated for my EDK project.

Please let me know if I can send you any more files. Thanks.

-Brianna

[RalphBodenner]

Thanks, Brianna. We have your files and will investigate shortly.

[AMIT]

hello Brianna,

i am getting the same problem "all the results are 0. " when i run 2DFFT on Virtex2Pro xilinx ML310 Board, using Xilinx EDK.


Any ideas on what I could be doing wrong????



AMIT
IIT Delhi

[cls_egr]

hello Brianna,

i am getting the same problem "all the results are 0. " when i run 2DFFT on Virtex2Pro xilinx ML310 Board, using Xilinx EDK.
Any ideas on what I could be doing wrong????
AMIT
IIT Delhi

Hi,

If you are using floating points, are you also using xil_printf? I had problems when using xil_printf because I think it does not handle real numbers.

cls