Hi,
Want to port a full screen (800x600 or 1024*768) LCD application onto an AT91sam9263 system running ARM Linux. The Atmel kit I am playing around with has a QVGA interface. The data sheet is a little vague as to the capability of its internal LCD controller. Any advice or comment would be much appreciated.
TLH
"Tat Ho" skrev i meddelandet news:fcld1m$ek5$ snipped-for-privacy@nnews.pacific.net.hk...
The LCD controller does not have a problem with large resolutions. It can handle 4k x 4k.
The most important thing is how much bandwidth you need from your memory.
With 800 x 600 x 16bpp * 60 Hz you need 56,25 MB/s for display refresh
With 1024 x 768 x 16 bpp * 60 Hz you need 92,16 MB/s for display refresh
The CPU, running at 200 MHz has 400 MB/s max bandwidth to memory. There is overhead to be considered, so in practice it will be less than that.
If you put the display buffer on EBI0, you will lose minimum 20-35% of the CPU performance.
A good approach is to calculate the display contents on EBI0, and then let the DMA controller copy the frame to EBI1 which will only be used to refresh the display.
-- Best Regards, Ulf Samuelsson This is intended to be my personal opinion which may, or may not be shared by my employer Atmel Nordic AB
Ulf,
Thanks for the clarification and advice.
Best regards,
TLH
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.