- QVGA display panel
- Posted by suresh shenoy on February 19th, 2008
I am currently working with a QVGA and interfacing it with a display
controller which has 256kbytes of SRAM (display buffer). The QVGA is
18 bit (R,G,B - 6bit each.) I would like to calculate the address
range for each line, so that I can fill the buffer appropriately. Any
leads would be really helpful.
Suresh M. Shenoy
- Posted by badal_akr on February 19th, 2008
one line = 320*18 Bits = 320*18/8 bytes = 720 Bytes
Hope it helps
anil
- Posted by Didi on February 19th, 2008
No controller I have seen supports such a format in memory.
The typical approach is to use 16 bits per pixel of RGB data,
5-6-5. Or use 24 bits per pixel and use only 18 of them (not
that it makes much sense, but it is possible).
Dimiter
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badal_akr wrote:
- Posted by suresh shenoy on February 19th, 2008
On Feb 19, 10:33*am, Didi <d...@tgi-sci.com> wrote:
I am interested in calculating the address range. For example I want
to fill the address buffer on the first line to paint black. And then
paint second line to paint white.
The address from trial n error looks to be 0 - 07A0 for the first
line. And I believe there should be a method to calculate this?
Suggestions?
- Posted by Didi on February 19th, 2008
I suppose it is my turn today to answer homework questions :-).
Pixel address= ((line_number*pixels_per_line)
+column_number))*bytes_per_pixel .
Line numbers are 0 to 319, column numbers are 0 to 239 in your case.
Dimiter
suresh shenoy wrote:
