topic Question about max9286 in i.MX Processors

Question about max9286

kuangcan — Mon, 01 Jun 2020 09:02:57 GMT

I have some problems. Now I am using max9286 + max96705 + ov10635 to debug the camera, but now there are two problems that prevent me from solving it:
1. There will always be the phenomenon that the camera cannot be connected;

2.OV10635 hasn't been found

3. Write max9286 reg error

Thank you for your help, best wishes to you!

Re: Question about max9286

Bio_TICFSL — Tue, 02 Jun 2020 13:45:08 GMT

Hello Cocoin,

How to set the swap of MAX96705 depends on the connection between OV10635 and MAX96705. If they are connected with 10 data lines, they need to set 0x20~0x29 and 0x30~0x39. If they are directly connected with 8 data lines, then only need to set 8x2 A register, high 8 bits or low 8 bits.

In fact, if you are using OV10635, you should not need to swap in MAX96705, just let MAX9286 Driver directly send the settings in the code to the camera module. If you buy a ready-made module, then he generally All come with flash ROM. In this case, the camera uses the settings in the flash ROM. This is not applicable to the situation of looking around. You need to update its Flash ROM settings and use the parameters in the Driver.

Or disconnect the Flash ROM so that the settings in the Driver can be sent to the camera module.

I had tested two cameras with MAX9286 on IMX8QXP MEK C0 board, there is no issue.

The linux BSP is 4.14.98_GA2.0.3. Just update seco and scfw.

I just use unit test application to make sure there is no driver and hardware issue:

Preview one camera:

/unit_tests/V4L2/mx8_v4l2_cap_drm.out -cam 1 -fmt RGBP

Preview two cameras:

/unit_tests/V4L2/mx8_v4l2_cap_drm.out -cam 3 -fmt RGBP

Note: the OV10635 camera with MAX9286 is 1280*800, not 1280*720.

Regards

Re: Question about max9286

kuangcan — Tue, 02 Jun 2020 14:44:44 GMT

Hi Bio_TICFSL,

      Thank you for your kind reply, it is very helpful to me. But I still have two questions:
      First, I don't quite understand "8x2 A register", what is this?
      Second, how to update seco and scfw, can you provide relevant links?
      Third, the resolution of the ov10635 I use is indeed 1280x720, but I have already set the relevant settings in the driver.

Note: I successfully lit up the camera, but sometimes those problems occur，which confuses me.

Looking forward to your reply, best wishes to you!