Modify NEEK "Hardware Design Examples that support VGA"

[Altera_Forum]

Hello, 

 I have extended my NEEK system with the dma_splitter and vga16_controller of the following NEEK example: Hardware Design Examples ( http://www.nioswiki.com/@api/deki/files/13/=neek_standard_ddr_vga_mirror_design_example.zip ).   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.  Got someone to work the vga example properly or experienced this problems?  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).  Has someone an idea how to get the video pipeline to control a vga display?  I would be very grateful for some hints.  - D.

[Altera_Forum]

No one tested the examples before?

[Altera_Forum]

Hi, 

   --- Quote Start ---   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.   --- Quote End ---    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.    --- Quote Start ---   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).    --- Quote End ---     VGA_SYNC <= VGA_HS & VGA_VS;    --- Quote Start ---   No one tested the examples before?   --- Quote End ---   This Nios Linux distri. is almost incomplete .  Kazu

[Altera_Forum]

Thanks a lot, got the NEEK to control the VGA with the video_sync_generator.