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Last Post 07 Nov 2003 11:29 AM by  francisco.gutierrez@nav-international.com
How do you display a picture?
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francisco.gutierrez@nav-international.com
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--
07 Nov 2003 07:41 AM
    Hello Everybody, How do you display a picture (In code, no LOLO)??

    This is what I had tried:

    I partially took this from one of the demos in the kit. The demo was clearing the video buffer, so instead of *pbf=0 I replaced it with a color 0x01E0 (green), but it looks weird, it does not paint all the vertical lines why?
    also
    would this display my picture if I do this:

    pfb = (UNS_32*)SRAM_PHYS_BASE
    while ((UNS_32)pfb < (image+ DISPLAY_WIDTH*DISPLAY_HEIGHT)*2))
    {
    *pfb=*(pointer of my picture array)
    pfb=pfb+1;
    (pointer of my picture)=(pointer of my picture)+1;
    }



    here is the code:

    pfb = (UNS_32*)SRAM_PHYS_BASE
    while ((UNS_32)pfb < (image+ DISPLAY_WIDTH*DISPLAY_HEIGHT)*2))
    {
    *pfb =0x01E0; //(GREEN)
    pfb=pfb+1;
    }
    miket@logicpd.com
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    --
    07 Nov 2003 09:47 AM
    what are pfb and pbf declared as?
    francisco.gutierrez@nav-international.com
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    --
    07 Nov 2003 10:11 AM
    pfb (no pbf sorry typo):

    UNS_32* pfb=NULL;
    UNS_32 image = SRAM_PHYS_BASE;
    miket@logicpd.com
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    --
    07 Nov 2003 10:17 AM
    That's the problem, you're doing pointer math on a 32-bit
    pointer, so when you do pfb = pfb + 1; you're incrementing
    the pointer by 4 byte positions. And the write to the pointer
    location is 32 bits as well (so you're really writing 0x000001e0.)
    Try changing the declaration of pfb to UNS_16 *pfb;
    francisco.gutierrez@nav-international.com
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    --
    07 Nov 2003 11:29 AM
    THANK YOU! it worked!!
    You are not authorized to post a reply.

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