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TM4C123GH6PM: 2048 16bit real data FFT

Bo Dong26
Prodigy 250 points

Part Number: TM4C123GH6PM

Hi,

Does anyone have the experience that if the MSP430F5438A-EP can do 2048 16bit real data FFT within 50ms? If not, would you help suggest a controller or DSP which can do this job? It is better to be a low power processor.

Thanks,

Bo

  • 0
    TI__Guru**** 191886 points

    Hi,

      For MSP430 products you should post your question to the MSP430 forum. For TM4C, you can use the CMSIS library which contains DSP library that can support FFT at 2048 points. Please refer to this app note for details. 

  • 0 in reply to Charles Tsai
    Prodigy 250 points
    Hi Charles,

    Thank you for the reply. It was a typo and I want to use the TM4C123GH6PM to do the 2048 16bit real data FFT and I need the complex results. Because I want to make sure that the TM4C123GH6PM can meet our requirements (2048 16bit FFT in 50ms) before I buy it, could you help run the test for me or help find a similar results?

    Thanks,

    Bo
  • 0
    Guru 117855 points

    Both your "Subject Line" - and then "Part Number" w/in post's body - target TM4C.

    Yet your lead sentence aims at MSP-430 (not the TM4C) - such is (more) than a little confusing - is it not?

    As vendor notes - MSP-430 has its own forum - should that (singular (MSP430)) mention - represent your (real) question...

    I'd estimate that there's "not much chance" that a forum user here - can (fully/properly) recall (cold) such, "specifically focused - past measured results."    

    Instead - would it not prove more effective for you to, "Search various candidate MCU forums - keywords "FFT" - in hopes of finding (some) FFT results.     (you may then be able to "extend or interpolate" from "others'" results - and/or "Contact those" (proven) to "share your FFT interest" - and request their assistance.

    Such superior "investigatory skills" can be expected to (superbly) "pay-off" - both now and long into the future...

  • 0
    Guru 27665 points

    http://lmgtfy.com/?q=FFT+performance+ARM+M4

    YMMV but the first link I found was this

    http://openaudio.blogspot.ca/2016/09/benchmarking-fft-speed.html

    Which appears to contain all that's necessary to make a reasonable estimate.

    Don't forget to include memory estimates. You can eat up memory in a hurry with working copies.

    Robert

  • 0 in reply to cb1_mobile
    Prodigy 250 points

    Hi,

    Thank you for the suggestion. It was a typo and I want to use TM4C123GH6PM to do the 2048 16bit real data FFT.