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RTOS/TDA3XEVM: How to change the CPU frequency of DSP

YiTing
Expert 1200 points
Part Number: TDA3XEVM

Tool/software: TI-RTOS

Hi  : 

   SDK Version : PROCESSOR_SDK_VISION_03_04_00_00

   CCS Version  : CCS8

    Question:

    Can you tell us how to Change and  Check "DSP(C66x) operating frequency" with "CCS " & SBL(qspi).

  

   

   

   

    

  • 0
    TI__Guru 55685 points
    Hi,

    If you are using CCS you need to call gel APIs to change and check frequency.
    If you are using SBL you can call PM APIs to set various OPPs.
    Can you specify what exactly are you using?

    Regards,
    Rishabh
  • 0 in reply to Rishabh Garg
    Expert 1200 points

    Rishabh Thank you for your reply

    I know the frequency can change in the gel ,but i can not find the exactly file
    Can you tell me how to use gelAPIS and PMAPIS ?

    I try to use CCS Scipt M4 To check DSP frequency ,but  useless

    the image is CCS  windows about gel file uder :  

  • 0 in reply to YiTing
    Expert 1200 points

    I Find the gel and change the fre , Provide everyone with reference
    I trying to find SBL Change dsp fre now

  • 0 in reply to YiTing
    TI__Guru 55685 points
    Hi,

    On TDA3, DSP and EVE clocks can be derived from different DPLLs.
    Hence you might not see change in frequency of a particular DPLL while changing the OPP.

    You need to build SBL for a different OPP.
    Please see chapter 9 of SBL user guide: processors.wiki.ti.com/images/b/b7/TDA_SBL_UserGuide.pdf

    Regards,
    Rishabh