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Altera_Forum
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15 years ago

I have a problem about the sgdma when I used it to transfer vga data(800x600x4bytes)!

Hi, Just as the title describes,I wanna to use the SGDMA to tranfer VGA data which has much of data(800x600x4bytes=1920000bytes).SGDMA is configured to Memory to Streaming mode , the descripto...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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2) The program wrote the data via the data cache, and the data for the last few lines hasn't been written to physical memory.

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True, You must use data flushing if Nios is cached. 

alt_dcache_flush_all();