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Problem in 1D to 2D data transfer through EDMA3

swati Davari79610
Prodigy 10 points
Other Parts Discussed in Thread: TMS320DM6437

Hi,

We are using TI DAVINCI TMS320DM6437 EVM board.I am trying to transfer bunch of  1280 * 4 bytes from one image

in to the 2D buffer 0f size 30 * 512 for further processing on the same. (Actual Image size is 1280 * 800)

I have following configuration of PARAM

1. AB sychcronization in polling mode.

2. Acnt     =  30;       //Wdt_Dst;
    Bcnt     =  512;     //Ht_Dst;
   Ccnt      =  1;
   SrcBIdx =  1;
   DstBIdx = 1280;   //dst stride
   SrcCIdx = 0;         
   DstCIdx = 30;       //WdtDst;

i am getting the garbage data.

I did the CACHE_WRITE_BACK as well.

Please guide me.

Thank you

 

 

  • 0
    Genius 3575 points

    Did you do a cache write back on the original source before you started the dma, and then do a cache invalidate (not write back) on the destination?  Also, I am not clear on the dimensions of your transfer.  Your param values seem a little funny, can you describe exactly what you are trying to do?