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Altera_Forum
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20 years ago

VGA Controller

This is a VGA Controller peripheral that can be used directly in SOPC Builder with Nios II. The controller contains its own free-running DMA engine that continually fills a FIFO with video data...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

vga_frame_buffer = vga_init_no_interrupt( vga, HEAP );

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In my niosII system, SDRAM space is 0x0100000~0x01fffffff, but vga_frame_buffer = 0x8101a9c8, vga_frame0 and vga_frame1 are not in SDRAM,

Why?

vga_frame0 and vga_frame1 are always 0x00, So VGA Monitor is always Black.

If I use:

vga_frame_buffer = vga_init_no_interrupt( vga, 0x01800000 );

in order to assign vga_frame_buffer in SDRAM, but vga_frame0 and vga_frame1 return 0.