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uDMA for EPI port in TM4C129

pooja trivedi
Intellectual 455 points

Hi all,

I am using TM4C129NCPDT microcontroller and newhaven NHD-2.4-240320CF-CTXI#-F-ND TFT LCD. I have driven LCD with controller's EPI port. Now I want to use EPI port with uDMA. Is there any sample code available for LCD EPI port?

I run two ADCs and one DAC with three SSI port and use one timer in my code. and I use graphic library of microcontroller to drive LCD. Now while loop of GrStringDraw,GrRectDraw,GrImageDraw etc. functions take much time so LCD refresh time increases.

Is this delay problem can be solved by using EPI on uDMA? 

  • 0
    TI__Guru**** 244380 points
    Hello Pooja,

    Seems to be the same post...

    e2e.ti.com/.../447546

    There is no ready to use code as I mentioned. Now note that the Gr functions require processing (CPU) and cannot be done by DMA. What DMA can only do for you is move the processed pixel data from the internal memory to the panel.

    Regards
    Amit