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OV9653 image sensor interface problems

Hi, I am trying to capture the a single frame through omnivision 9653 an trying to write in sdram of ceva dsp processor.(i am new to this area) i followed the sccb protocol for communication(read/write) and the defaul values of the registers are read correctly.i can also be able to modify th ov9653 registers and the values are reflected back.so far ok

for capturing the image (SXGA - 1280x1024 pixels)

I found that HREF,HSTART,HSTOP,VSTART,VSTOP registers contain defaul values for SXGA format.

Ex: HEND-HSTART = 1280 (reg.values by default) VEND-VSTART = 1024 (reg.values by default)

Register CLKRC - pixel clk is half the inp.clk (inp.clk->25MHz)

ceva fpga registers are programmed for image size,width,height and pointers to YCbCr.

i am unable to get the data to memory.but End of Frame indication bit i set after the command to fetch data.but data is not available in memory.i there a problem in camera chip side or ceva dsp side.

any help would be greatly appreciated.

Reply to
swami
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That assumes no blanking pixels and lines which one hopes is the case.

Can the Ceva FPGA deal with Cb and Cr on different clock edges? That is the usual Omnivision trap that most people fall into. Check your data format and values.

More importantly check what you connections are as to whether this is a demo board, a board you have made or someone has made for you.

Without knowing more of the DSP and board in use it is difficult to help.

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Paul Carpenter          | paul@pcserviceselectronics.co.uk
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Reply to
Paul Carpenter

blanking period is there, i mentioned it incorrectly.

For SXGA - 1280x1024 pixels:

for VSYNC is 1050 (greater than 1024)including blanking time HSYNC is 1520(including blanking time) > 1280

default

the

is

memory.is

help.

Reply to
swami

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