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NTSC output for APALIS IMX6

Question asked by morel mathias on Oct 26, 2018
Latest reply on Nov 13, 2018 by Qiang Li - Mpu Se

Hi,

I contact you because i have read your post here :

https://community.nxp.com/message/442000?commentID=442000#comment-442000 

You seem to be good in display parameters.

 

I have an Apalis card and i want an NTSC/PAL output. For beggining i test only the NTSC.

 

So I want to use the AD723 chip which use the vga output.

I patch my linux kernel with the patch 0001 and 0004 from here :

Patch for iMX6 BSP to support interlaced display on HDMI and LCD interface 

 

And i modify the file :

nano ~/linux-toradex/drivers/video/fbdev/mxc/mxc_vdacif.c

by adding these parameters :

  /*NTSC */

        { NULL, 30, 720, 487, 74074, 16, 2, 17, 3, 142, 1,

          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,

          FB_VMODE_INTERLACED, FB_MODE_IS_DETAILED },

};

That's your parameters for BT1120.

I have the video on my display but it's like the video always scrolling.

 

The AD723 need RS170A timing that i found here :

http://atarionline.pl/forum/?PostBackAction=Download&AttachmentID=6601 

and p8 of

https://www.matrox.com/imaging/media/pdf/support/cameras/camera_guide.pdf 

 

Can you explain me or give me the correct configuration?

 

Here the result with the configuration :

https://youtu.be/T45yGvkcr8g

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