i.MX RT1176 MIPI-CSI2 input example Question

[Hamish1]

I have a question about the MIPI-CSI example from SDK.

And, I study the data sheet about the MIPI-CSI.

The camera inputs from the MIPI-CSI and the format is YUV422(8bits).

Following the datasheet, the image data will be packaged to the 16bits data. (Ref datasheet 46.3.3)

Then, the data will send to CMOS Sensor Interface(CSI).

I read the example code. But, the input of CSI data is set to 24 bits data. (Ref. example csi_mipi_yuv_cm7)

Why the CSI input data bus does not match the MIPI-CSI outputs format.

[jingpan]

Hi @Hamish1 ,

The CSI will convert input pixel format from YUYV to XYUV.

Regards,

Jing

[Hamish1]

Hi Jing,

      Thanks for your reply.

      The problem does not descript in the datasheet or TRM. 

      In addition, as you say, which MIPI-CSI format supports, I can input it to the microcontroller.

      In my project, my camera cannot change our CSI sequence for us.

      Could I change the register to adjust the input sequence in my project? 

      Thanks.

[jingpan · Accepted solution]

Hi @Hamish1 ,

This is because  the VIDEO MUX can only output 24bit data. You can refer to this post for more detail.

https://community.nxp.com/t5/i-MX-RT/iMXRT1176-MIPI-CSI2-to-UVC-reducing-the-frame-buffer-s-size/m-p...

Regards,

Jing