DSPLIB for OMAPL137

Vijay Hiremath40

Prodigy 220 points

Hello,

we are planning to use DSPLIB for FFT calculation of our application, and I was searching for suitable libraries.

I could find below mentioned libraries,

1) c674x-dsplib_1_03_00_01

2) dsplib_c674x_3_4_0_0

which one is stable and latest?

And In the second dsplib_c674x_3_4_0_0 how do you link the .lib to project?

I could find dsplib.lib file is the size of 1KB in the lib folder.

I am novice in DSP, Elaborated answer would help a lot.

Thanks And Regards,

Vijay Hiremath

over 9 years ago

0 Sivaraj Kuppuraj over 9 years ago

TI__Mastermind 35645 points

Hi,

Thanks for your post.

The second one would be the stable one for efficient FFT computation which would be the better choice.

The DSP on OMAPL137 is a C674x DSP so the C674x DSPLIB is the one that you should be using for the platform. As for the twiddle factor(w) generation, the function is provided in the examples or sample project provided in the package (packages/ti/dsplib/src). The FFT in the library expects complex input (x), with real part and imaginary part placed in even and odd address locations in the input vector(x). But we also provide instructions to use this when the input is real on the following wiki:

http://processors.wiki.ti.com/index.php/C674x_DSPLIB

http://processors.wiki.ti.com/index.php/Efficient_FFT_Computation_of_Real_Input

There is a Real_fft_demo_c674x.zip file attached on the above wiki in which you will find an example C code which would walkthrough the details on the derivation of FFT algorithm used.

/cfs-file/__key/communityserver-discussions-components-files/791/3252.Real_5F00_fft_5F00_demo_5F00_c674x.zip

Please check the app. report below for implementing FFT algorithm for real valued sequence:

http://www.ti.com/lit/an/spra291/spra291.pdf

Thanks & regards,

Sivaraj K

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0 Vijay Hiremath40 over 9 years ago in reply to Sivaraj Kuppuraj

Prodigy 220 points

Hello Sivaraj,

Thank you for your quick response.
Your info was really helpful in getting started.

It would be a great,
if you can help us in finding the procedure to use DSPLIB in our project.

Or

How to integrate the DSPLIB into CCS project?

Thanks in Advance.

Regards,
Vijay Hiremath

0 Sivaraj Kuppuraj over 9 years ago in reply to Vijay Hiremath40

TI__Mastermind 35645 points

HI,

You could refer the Real_fft_demo_c674x.zip file attached on the above wiki in which you will find an example C code which would walkthrough the details.

Thanks & regards,
Sivaraj K

0 Vijay Hiremath40 over 9 years ago in reply to Sivaraj Kuppuraj

Prodigy 220 points

Hello Sivaraj,

Thank you for your timely reply.

But my question was how do you use DSPLIB library?

i.e How can you integrate the library in the current CCS project?

We are aware of the FFT implementation, But we really want to know how to use DSPLIB library provided provided by TI, into our own project?

Kindly guide me towards any link or guide which explains the procedure integration of DSPLIB into particular project.

Thanks And Regards,

Vijay Hiremath

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DSPLIB for OMAPL137