topic Re: imx6q parallel cmos sensor timing problem in i.MX Processors

imx6q parallel cmos sensor timing problem

lampo — Tue, 08 Nov 2016 05:01:52 GMT

The image captured is dividing into blocks with image shift(see the attachment).

Image sensor is mt9v034,8 bit monochrome,parallel. And we have confirmed with aptina that we can capture the picture if we didn't change any register of the sensor .

The output data line used of the sensor is high 8 bit of the 10 bit, connecting to imx6q output pin CAM_D0 ~ CAM_D7. imx6q provides 24M sysclock to the sensor. Is there could be some timing problem with imx6q?

But when the the image is overexposure(auto agc,auto aec),then the image captured is just right with no dislocation.

it has been a week,but we still have no idea about what's wrong. We really appreciate your advice,thank you.

Re: imx6q parallel cmos sensor timing problem

igorpadykov — Tue, 08 Nov 2016 05:10:07 GMT

Hi glb

please check that sensor was correctly connected (starting from IPUx_CSIx_DATA19

) according to Table 66. Camera Input Signal Cross Reference, Format, and Bits Per Cycle

i.MX6DQ Datasheet

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf

Best regards
igor
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Re: imx6q parallel cmos sensor timing problem

lampo — Tue, 08 Nov 2016 09:00:07 GMT

thanks a lot, igor.

I also want to know, for 8 bit gray raw image sensor , which format of IPU Sensor Interface should take,

RGB565 or RGB888? (I find IPU_PIX_FMT_GENERIC in code,but i don't know which format it corresponds to).

But even for these formats, the IPU CSI supposes one pixel has 2 or 3 clock cycles, while my sensor outputs 2 pixels

in 2 clock cycles! Does this affect the real image content(we don't use IPU processing func,just take CSI->MEM path)?

Re: imx6q parallel cmos sensor timing problem

igorpadykov — Tue, 08 Nov 2016 09:06:37 GMT

Hi glb

it may be useful to check links

https://community.freescale.com/message/331888
https://community.freescale.com/message/309833#309833
https://community.freescale.com/message/309069#309069