Camera

Hi,

  Please crosscheck your configuration against our reference script & recommended setting according to your corresponding input.
 Note that all the writes given in the scripts are required for the correct operation of the ADV7180.
 Make sure ADV7180 clock output is stable. XTAL input pin of ADV7180 is connected to the clock source 28.636MHz .

Thanks,

Poornima

There is no problem with XTAL input, the screen only flashes for 30 seconds and then returns to normal. Capture the register value at this time and compare it with the normal one. It was found that adv7180 0x12 bit LL NSTD Nonstandard line length 0x13 bit STD FLD LEN field length standard   Can both of these bits indicate that the camera's data source is abnormal and causing screen flickering

Hi,

'LL_NSTD' bit in register 0x12 indicates whether the line length is nonstandard. If this bit is set, it suggests that the line length of the incoming video signal is not following standard values, which can cause timing issues and possibly flickering if the decoder is not handling it correctly.

 0x13 bit STD FLD LEN field length standard     this bit error mean there is something wrong with the image?

 Thanks

Hi,

   This register indicate that we found correct field length from incoming signal & it doesn't mean the wrong image.

Thanks,

Poornima

When the problem occurs, the value of the 0x13 register is 0xc9 STD FLD LEN field length standard If this value is 0, which means the input graphic is not of the correct length, does it indicate that there is a problem with the camera's input graphic.

Hi,

 '0x13' is a status register (read only), If received video has standard field length then 6^th bit sets to 1 otherwise it is 0. In your case 6^th bit is zero So you need to take care of input video field length.

Please note that, when analog video source is quickly disconnected and then reconnected (i.e Turn On and Off), then the ADV7180/ADV7182/ADV728x can output a field of non-standard length. This can confuse some back end processors. Resulting in unusual output video for 2 or 3 frames of video.

Thanks,

Poornima

0x13 "is a status register (read-only). In my example, the 6th digit is zero. Can it indicate that there is a problem with my camera input

Hi

  If 6th bit is zero, It seems progressive input is detected

  And let us know your input format with respective source and sink. 

  Please check the same with back-to-back/Direct connection.

Thanks,

Poornima

Our format is FMT_YUV422_8BIT