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TMS320DM8168: TMS320DM8168+TVP5158 摄像头断开连接时如何让A8核知道

user6020728
Prodigy 70 points
Part Number: TMS320DM8168
Other Parts Discussed in Thread: TVP5158

在DM8168+TVP5158平台下，使用DVRRDK-04.01.00.02。当拔掉TVP5158任意一摄像头时，被拔掉的通道依然可以采集到数据，显示器对应通道画面会变成全黑颜色。但如何能让A8核心也知道，TVP5158当前哪个通道的摄像头无连接。

  • 0
    TI__Guru**** 155073 points

    你好，

    我在TVP5158的数据手册里，没有找个每个通道同步相关的寄存器，只有整体的。

    Subaddress 00h
    Lost lock detect
    0 No lost lock since this bit was last cleared
    1 Lost lock since this bit was last cleared
    Color subcarrier lock status
    0 Color subcarrier is not locked
    1 Color subcarrier is locked
    Vertical sync lock status
    0 Vertical sync is not locked
    1 Vertical sync is locked
    Horizontal sync lock status
    0 Horizontal sync is not locked
    1 Horizontal sync is locked

  • 0 回复 Chris Meng
    Prodigy 70 points

    A8核能否获取到VPSS M3核检测TVP5158是否采集到视频数据信息么？

  • 0 回复 user6020728
    TI__Guru**** 155073 points

    你好，

    TVP5158在没有视频输入的时候，仍然会输出黑屏，所以VPSS M3还是会采集到数据。你能在VPSS M3里添加代码来判断收到的数据是否为黑屏数据么？我没有想到其他更简洁的方法。

    Thanks,

    Chris