VGA on Zedboard

Hi all, I am a fan of the Zedboard. And fortunately I got one.

But I found it was difficulty for me to play this board.

I just want how to control the VGA under the linux attached in the Zedboard.

I saw a VGA demo on the Zedboard that can showed a Digilent logo through VGA. And I knew that this demo was implemented through the PL only.

I want to know if I can control the VGA using the C program language under the Linux porting in the Zedboard and how I can done this.

And did anyone know how the demos were implemented? Could I get the source project files about these demos?

And were there any other forums that contained the projects about Zedboard? Cause I found there was very few information about on the Internet.

I am appreciative for any information.

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0 Former Member over 12 years ago

VGA port on Zedboard can only be controlled from the PL logic. To control the VGA port you will need an AXI bus master controller that generate VGA scan signal from DDR memory.
To control the VGA display controller from Linux, a frame buffer device driver is needed to drive the display device.
Xylon has a display controller solution for Zynq chip.
And here is some information about creating a simple Vedio generator on FPGA: http://www.fpga4fun.com/PongGame.html
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0 Former Member over 12 years ago in reply to Former Member

I think the easiest way is to create framebuffer by using AXI connections. Meaby need some line buffer.
VGA is only 8bit so 800x600 takes about 470 kB so this can be stored to DDR. Slave AXI can take Framebuffer address and use master AXI to read framebuffer from DDR.

Then you only need to write drivers for linux and configure to X using it or use direct memory access to that area.
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0 Former Member over 12 years ago in reply to Former Member

I think the easiest way is to create framebuffer by using AXI connections. Meaby need some line buffer.
VGA is only 8bit so 800x600 takes about 470 kB so this can be stored to DDR. Slave AXI can take Framebuffer address and use master AXI to read framebuffer from DDR.

Then you only need to write drivers for linux and configure to X using it or use direct memory access to that area.
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