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Original question:

CCS/TDA3XEVM: __pblock variable takes up WMEM space in EVE

CCS/TDA3XEVM: How to configure Vertical auto-increment in EDMA?

Henry2333
Intellectual 490 points
Part Number: TDA3XEVM


Tool/software: Code Composer Studio

Hi,friends.

I am using EDMA in EVE.

In DMAUtilsLibrary_UserGuide.pdf, I see this sentence.

"Vertical auto-increment: In this usecase, blocks are first incremented in vertical direction then in horizontal direction."

But I don't see how to set Vertical auto-increment in the documentation.

Can you tell me how to configure Vertical auto-increment?

Thanks.

  • 0
    TI__Guru 56820 points

    Hi Henry,

        dmautils interface has extBlkIncrementX and extBlkIncrementY variables. These are used to decide which direction you want to move to. Only thing which you should be carefull is that these variables are in terms of 16 bit signed integer so maximum jump which you can provide for extBlkIncrementY  is limited by that.


    Regards,

    Anshu

  • 0 in reply to Anshu Jain
    Intellectual 490 points

    Hi,Anshu

    Thank you for the reply.

    I have both horizontal and vertical increments in EDMA, and I want to increment first in the vertical direction and then in the horizontal direction.

    So I set both the extBlkIncrementX and extBlkIncrementY variables.

    But the default order of EDMA is horizontal first and then vertical.

    How do I set EDMA to be vertical first and then horizontal?

  • 0 in reply to Henry2333
    TI__Guru 56820 points

    You can give extBlkIncrementX to be pitch * blockHeight. Note that this should be less than 16bit signed number.

    Regards,

    Anshu