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Question, i.MX6SoloLite CSI usage

Question asked by AVNET JAPAN FAE (team share account) on Sep 8, 2016
Latest reply on Sep 19, 2016 by jamesbone

Dear team,


 I would like to ask about the usage of i.MX6SoloLite CSI module.

My customer is using CSI of i.MX6SL for capturing images from CMOS camera which is ZEBRA/SE4750(1280x960, 8bit/monochrome, 60fps).

And they are facing the issue that the image from the camera could be corrupted when re-start the image transfer from camera after pausing the transfer.

They are using CSI interface with Gated Clock mode and DMA transfer.

As above, when they issue the start of image transfer command to the camera through I2C after they issue the pause of image transfer command to the camera through I2C, the problem could occur.

They think the cause is VSYNC. Please find the attached file for the corrupted image.

When they issue the pause command, sometimes the transfer of one frame does not complete. At that time, VSYNC stays low.

In this situation, when issuing re-start command the problem seems to appear.

They think that this problem may be fixed by re-initialize camera and CSI right before issuing the re-start command. But they want to know other ways to avoid this problem.

They think adding something to the issuing pause and re-start command procedure in software can avoid this issue.

Could you show me what should be added to the pause or re-start procedure to avoid this problem if you can?