Hi all,
I used DM642+TVP5154A to do AVM application.
But I found some sets that appeared abnormal status on CH2 when did . After dumped YUV image from DM642 CCDC side, I could make sure the problem occurred on TVP5154A.
The problem was I removed camera and re-connected camera again at the run time. Only CH2 video went to abnormal status. It became low quality and flicker appearance. Then I dumped TVP5154 registers to find when changed value from 0x20(abnormal) to 0x60(default) on "Luminance Processing Control #1 Register". The video would go back to the normal status. But I did the hot-plug again, the video became worse again. Then I wrote the value from 0x60(default) to 0x20(abnormal). The video went back to normal status again.
So, I could not base on this strange state to do a work around. Could someone please give me some hints to handle this unstable state? Thanks in advance.
B.R.
OC