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Altera_Forum's avatar
Altera_Forum
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16 years ago

A question about Resolution of Framebuffer under uClinux

Hi all, I'm a newbie to uClinux and Nios II. Now I am able to use the UDP protocol to transfer an image from PC to DE2 board and show it in the VGA screen through the Framebuffer in a resolution o...
Altera_Forum's avatar
Altera_Forum
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16 years ago

The vga controller supports higher resolution. You may edit the instance to change it.

You will need to modify the defs in nios2-linux/linux-2.6/drivers/video/altfb.c

# define VGABASE na_vga_controller_0 /* Altera VGA controller */# define XRES 640 ==> 800# define YRES 480 ==> 600# define BPX 16

One thing to watch out is the memory bandwidth, which is tight on DE2. The higher resolution, the higher memory bandwidth consumed for display.

- Hippo