Modify NEEK "Hardware Design Examples that support VGA"

Hi,

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I kept the default vga parameters and clk (200MHz) as stated in the example description.

Now when I'm running my system on the NEEK board, the image won't show correct on my monitor due to wrong (?!) vga timings.

I also tested it with VESA VGA timings but had no success either.

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Please refer the manual

lcd_multimedia_hsmc_reference_manual.pdf

from pp.2-26 to 2-28, and set the parameters of video sync generator adequately. Be careful that you must supply the appropriate pixel clock, for example, 25MHz for the VGA(60Hz) 640 * 480 resolution mode.

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I would like to keep the idea of the NEEK video pipeline, but the final component of the pipeline (avalon_video_sync_generator) can't control a vga display as I know (no composite sync output).

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VGA_SYNC <= VGA_HS & VGA_VS;

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No one tested the examples before?

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This Nios Linux distri. is almost incomplete .

Kazu