topic Re: Capture on CSI0 in NTSC in i.MX Processors

Capture on CSI0 in NTSC

guys_fr — Fri, 30 Sep 2016 15:51:49 GMT

Hello,

I am investigating and/or questioning myself about the video quality in preview (CE7). I use two different camera (208C 380 lines, OP31 275 lines). I was wandering if CSI input has to be customized for each camera. The encoder is ADV7180 with BT.656 422 standard output. Also, any one of the recommended "fast switching script" hand-up in free running mode (blue screen)!!

Bosch demystifies analog video resolutions standard in "WhitePaper_enUS_1575840651.pdf". I did not find a way to know lines count.

Thanks. Guy

Re: Capture on CSI0 in NTSC

guys_fr — Fri, 30 Sep 2016 20:44:44 GMT

Actually, I think it' Odd/Even lines issue, validated in graphic drawing tool. How can I test iMX6 changes for Odd/Even in capture / display setting. The DC module have Odd/Even setting. The CPMEM also but always set to "0" in CE7 CPMEM ILVD CF = 0. iMX6 Doc.:

40.5.7 YUV422: No Odd/Even
40.5.10 YUV420: Odd line first

Thanks.

Re: Capture on CSI0 in NTSC

igorpadykov — Sun, 02 Oct 2016 23:36:54 GMT

Hi Guy

for ADV7180 usage in CE7 one can look at
iMX53_ARD/SRC/DRIVERS/IPUV3/CAMERA/bspcsi.cpp function BSPGetSensorResolution()
in i.MX53 Windows Embedded Compact 7 Source Code :
https://www.nxp.com/webapp/Download?colCode=IMX53_WCE700_1105_BSP_SOURCE&appType=license&location=null&fsrch=1&sr=1&Parent_nodeId=from%20search&Parent_pageType=from%20search&Parent_nodeId=1298573788032723957803&Parent_pageType=product
ADV7180 operation expalnation for linux can be found on
https://community.nxp.com/thread/295157

Best regards
igor
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Re: Capture on CSI0 in NTSC

guys_fr — Thu, 06 Oct 2016 20:00:31 GMT

Hello,

I have change the VSkip for an even number and it fixe my issue but causes side effect. VScroll does not auto-recover frame position. Any other way to change Odd/Even on the first line or realign interlacing?

Thanks, Guy