[fpga-miniconf] litevideo VGA on arty WIP

[Florent Kermarrec]

Hi Hasjim,

great, to understand why it's not working yet you can check:
- that the video pattern if enabled for the vga output in the firmware.
- that you are using a correct video mode (you can start with a low
resolution)
- if you have a scope, have a look at the clk/vsync/hsync.

Florent

2018-02-04 9:35 GMT+01:00 Hasjim Williams <hasjim.williams at futaris.org>:

> HI everyone,
>
> I managed to get Vivado 2016.4 to output VGA with the Pmod-VGA example
> from:
>
> https://reference.digilentinc.com/reference/pmod/pmodvga/start
>
> https://github.com/Digilent/Arty-Pmod-VGA
> https://reference.digilentinc.com/learn/programmable-logic/
> tutorials/arty-pmod-vga-demo/start
>
> I made some changes to litex-buildenv with the help of Florent, and made a
> pull request on github:
>
> https://github.com/timvideos/litex-buildenv/pull/20
>
> This is still WIP and output doesn't work on Pmod-VGA yet in the hdmi2usb
> firmware.
>
> I don't think it's clocking out the pixel clock, hsync and/or vsync
> correctly yet.
>
> Hasjim 'futaris' Williams
>
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>
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