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ADV7182 Software Issue

Question asked by wcgood on Jul 18, 2014
Latest reply on Jul 18, 2014 by GuenterL



There are software technical problems of ADV7182 below.


The problems background is:

        - Set Decoder Power On , and Set to Force Free Run mode(NSTC M) via IIC with correct IIC feedback.

        - MCU can detect scanline interrupt (continuously), and no exception generated. But the data after VideoIn Conversion Written into framebuffer(VRAM) are always all 0x000000(RGB) .


But we check all related setting in MCU Video In Module (Set as ITU-R 656(YUV4:2:2), Embedded Synchronization ,Sequence UY0VY1, Data Change at Clock Rise Edge, 480 * 720 , Interlaced Scan ), And Didn't find more doubtful point ?


So we want some support from our side to check if the output from ADV7182 is expected or Not , Or is There something else we didn't considered for MCU Video In Module Settings from your side .


  Here I captured pictures of some port output from ADV7182.