topic How to change csi0 pin from DAT12~DATA19 to DAT4~DAT11(imx6q)? in i.MX Processors

How to change csi0 pin from DAT12~DATA19 to DAT4~DAT11(imx6q)?

echozeng — Wed, 22 Jun 2016 06:03:20 GMT

Dear All,

Imx6q+Tw9900 (output YCbCr 4:2:2 ).

If config DAT12~DATA19 pin as camera data input， all works fine。

I changed csi0 data pin from DAT12~DATA19 to DAT4~DAT11 now, but can not capture video data。

How to use DAT4~DAT11 to replace DAT12~DATA19?

Re: How to change csi0 pin from DAT12~DATA19 to DAT4~DAT11(imx6q)?

qiang_li-mpu_se — Wed, 22 Jun 2016 06:13:40 GMT

For BT656 interface mode (EAV/SAV on data line), the data must be input from CSI_DATA19 ~ CSI_DATA12.

If you must use CSI_DATA11 ~ CSI_DATA4, then you can use VSYNC/HSYNC mode to capture, it needs 16 bits generic mode to capture the data from CSI_DATA19 ~ CSI_DATA4, then software needs drop the 8 bits MSB in memory.

From CSI side, the data will always to receive from DATA19, the MSB. This can't be changed.

Re: How to change csi0 pin from DAT12~DATA19 to DAT4~DAT11(imx6q)?

echozeng — Wed, 22 Jun 2016 06:36:44 GMT

Dear Li Qiang,

Tw9900 camera interface only has 8bits data pins, so we must use DAT19~DAT12 pin to capture video data according your description. is that right?

Re: How to change csi0 pin from DAT12~DATA19 to DAT4~DAT11(imx6q)?

qiang_li-mpu_se — Wed, 22 Jun 2016 06:46:11 GMT

Yes

Re: How to change csi0 pin from DAT12~DATA19 to DAT4~DAT11(imx6q)?

igorpadykov — Wed, 22 Jun 2016 11:27:44 GMT

Hi echo

there is no way to change it, but one can try other configurations

given in sect.4.11.10.1 IPU Sensor Interface Signal Mapping i.MX6DQ Datasheet

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

Best regards

igor

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