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Altera_Forum's avatar
Altera_Forum
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14 years ago

problem with LCD Refreshing rate

Hello, I recently designed a model in Quartus which connects to a color LCD device and shows what ever is on the SRAM. I am using the NIOS processor to fill the RAM with the relevent Data (P...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

How is the LCD accessing the frame buffer?

It might be that it is using all the SRAM banwidth - so the nios's accesses all get stalled.

If you are interfacing directly to an LCD panel you should be able to reduce the rate at which the pixel data is clocked into the panel (even mid-frame!). I've done that in the past to avoid LCD panel dma underruns when the cpu is doing slow cycles (ARM SoC part).