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Altera_Forum's avatar
Altera_Forum
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17 years ago

help me about picture.dat format with DE1!

hello! i'm trying to download picture.dat to kit DE1 using Control panel. And i want to process that image in SRAM. But i don't know about picture.dat format. Can anybody explain about that problem!:confused: thanks so much!

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    my problem is same. When i try to read DE1_USB_API project i see these line

    assign mVIN_R = mVGA_ADDR[0] ? mSRAM_VGA_DATA[15:8]<<2 : mSRAM_VGA_DATA[7:0]<<2 ;

    assign mVIN_G = mVGA_ADDR[0] ? mSRAM_VGA_DATA[15:8]<<2 : mSRAM_VGA_DATA[7:0]<<2 ;

    assign mVIN_B = mVGA_ADDR[0] ? mSRAM_VGA_DATA[15:8]<<2 : mSRAM_VGA_DATA[7:0]<<2 ;

    i don't understand that code "<<2"

    because vga data only take 4 MSB bit

    assign VGA_R = oVGA_R[9:6];

    assign VGA_G = oVGA_G[9:6];

    assign VGA_B = oVGA_B[9:6];

    please help me. thanks in advance