Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

DSP Builder or manually written VHDL ?

Hi everyone!

I'm currently working on a university project, based on the implementation of FFT on a FPGA. I read about the possibility to develop it using DSP builder with Matlab/Simulink. What is the best solution between a manually-developed FFT processor or the one obtained with Simulink and DSP Builder? I think that the former could be more customizable, while the latter allows to reach the goal quickly. Tell me if i am wrong.

Thanks in advance.

Matteo

6 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Hello,

    I'm a student myself just now doing the "final" project also :)

    I would say it depends a bit on your goal with this project. To learn VHDL, how to use tools and IP cores, or just to produce some final "device"?

    There is an FFT megafunction available also btw, in DSP->Transforms. It might suit your need :)

    M.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    The goal is to produce a final "device", because i've already learned VHDL. What about the megafunction ? is a block belonging to Simulink ? could you tell me more about that ?

    thank you
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    The megafunctions do not belong to Simulink. They are Altera IPs that can be instantiated via Quartus. Open up Quartus, go to Tools -> MegaWizard Plug-In Manager. Go through the help to learn more.

    If you are going to use the megafunctions, you should move this discussion to another sub-forum (since this sub-forum is for DSP builder :D).

    Bharath
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Bharath thank you for the answer. Do you think that the megacore function for FFT is better than designing a custom version ?

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    --- Quote Start ---

    Bharath thank you for the answer. Do you think that the megacore function for FFT is better than designing a custom version ?

    --- Quote End ---

    Depends on what you mean by "better". Using the megacore FFT means you don't have to be worry about converting a mathematical algorithm for realization on an FPGA (this may take quite a long time). But you still need to understand the functionality of the megacore module and have a basic understanding of FFT so you can use the megacore IP in your design.

    Good luck.

    Bharath
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    With "better" i mean in terms of time needed to perform the computation by the "processor". I'm going to write my doubts in another thread because now i'm off-topc. Thank you!