camera streaming to 3.5 lcd

Hi Suzan,

You need to design a daughter board that has the OV7725 camera. Do you have the camera module associated with it or do you have only the sensor? The TI EVM board has a camera port on which this daughter board can be directly plugged in. This camera port has the pins of the OMAP3530 ISP interface. You can take some open source driver that is available for Linux with V4L2 support for some other camera module other than  the OV7725 and then modify the stubs that are necessary for the OV7725.

Here  is a link to one of those daughter cards -> http://focus.ti.com/dsp/docs/thirdparty/catalog/devtoolsproductfolder.tsp?actionPerformed=productFolder&productId=5777.

Thanks,

Lakshmi

moidin suzan said:

hello,

I am new to omap processor family.am using omaps kernel version 2.6.29 for my project.i want to know the flow for streaming in lcd.

i dont know about isp and dss.plz can any one tel how its linked to v4l2 and overlay manager.

 

processor-omap3530

lcd-3.5

camera module-ov7725

Regards,

Suzan

The best way to learn something like this is to start with an existing code and then modify the stubs that suit your camera OV7725.  The OV7725 has an integrated ISP inside it and hence it can directly stream YUV which can be copied on to RAM and hence you need not use any functionality of the OMAP ISP. So, your driver should be fairly simple. As I mentioned above, take a driver that uses a camera module that has an integrated ISP inside (like the OV7725) and then you can write the stubs for your camera module. This is fairly simple and straight forward. There are many camera modules which have open source Linux drivers available and many of them have a display on which the video is streamed via DSS. Next level you can start looking at the code and then fine tuning your way and try to play around with the ISP. 

Lakshmi

hello lakshmi narsimhan,

thanks for ur clear explanation.i am done with hardware part.I am using Beagle board which has camera connector.we have designed a daughter card with camera module in-built in it...now i want to know the software flow.which and all drivers required for streaming to 3.5 lcd...plz share the sample codes which is used for streaming

regards,

suzan