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Floating point or fixed point FFT in DSPLIB c6670

SAI TECH
Intellectual 430 points

Other Parts Discussed in Thread: TMS320C6670, FFTLIB

I have little bit confusion about FFT and IFFT  in DSPLIB  . whether it will support fixed point or floating point. can any one help me to clarify my question immediatly pls.

We are using MCSDK _2_00_06_18,

                     SYS/BIOS_6_33_02_31

                      Xdc tools_3_23_01_43.

                     CCS5.5.

The EVM kit we are using is TMDSEVM6670L.

System configuration:Windows XP .

  • 0
    TI__Mastermind 23525 points
    Both are supported. Look at the function name. SP = single precisoin, DP = Double precision. Once you install the DSPLIB, the User manual is found at: C:\ti\dsplib_c66x_3_4_0_0\docs\DSPLIB_Users_Manual.html then click on API reference link.

    Regards,
    Travis
  • 0
    Expert 1810 points
    DSPLIB includes both fixed- and floating-point FFT and IFFT functions, although these only support power-of-two FFT sizes. If you need other sizes, you could look at FFTLIB, although this only supports C66x processors in little-endian mode, and only does floating-point. The TMS320C6670 also includes an FFT co-processor core (FFTC) that I believe is limited to fixed-point, power-of-two-sized FFTs.
  • 0 in reply to tscheck
    Intellectual 430 points
    hi tscheck,
    Thanks for your reply.as we are porting LTE eNB on TMS320c6670 .can you help me how to use the coprocessor FFT and Turbo decoder in Transmitter and receiver signal processing.
  • 0 in reply to SAI TECH
    TI__Mastermind 23525 points

    All I can suggest there is for you to install the MCSDK:

    After you install, there are examples on the FFTC located at: C:\ti\pdk_C6670_1_1_2_6\packages\ti\drv\fftc\example\multicore


    and the TCP at:  C:\ti\pdk_C6670_1_1_2_6\packages\ti\drv\tcp3d\example

    Good luck, and if you have further questions, you will need to open a new thread.

    Regards,

    Travis