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Linux/AM4379: Dual camera VPFE driver

William tong
Prodigy 70 points

Part Number: AM4379

Tool/software: Linux

Dear All,

I try port the sitara-linux-dual-camera-demo to my  am4379 board.

And I have modify the camera hardware to make the camera controlled by a button.

When I press the button,the camera will take a picture.But the driver does not return the picture instantly.

I have press the button again to get the first picture.

I wonder is there someone can give a reason from vpfe driver perspect.

Or could someone directly show me the method to get the picture instantly? 

Thanks in advance!

William

  • 0
    TI__Guru**** 393215 points
    Hi,

    The software team have been notified. They will respond here.
  • 0
    TI__Mastermind 22946 points

    William tong said:
    When I press the button,the camera will take a picture.But the driver does not return the picture instantly.

    What do you mean by driver does not return the picture instantly? How are you measuring it? Are you setting driver in streaming mode or snapshot mode? Is there any further processing of the image involved in software? Is there multi-thread involved at application layer?

  • 0 in reply to Manisha Agrawal
    Prodigy 70 points

    manisha,

    1.as my description,the first trigger get the first select return ,however the return data is black.

    I have trigger it again,and the data from the second select return is the data from the first trigger.  

    the select return just after the trigger is not the data when trigger happens.

    2.the oscillograph can measure the data. 

    3.I have succesfully get the picture use the stream mode.

    I just modify the camera hardware to make the camera into trigger mode.And,I didn't find the VPFE driver can be set to  snapshot mode.

    4,no further processing of the image,get the raw data from the vpfe driver then display it.

    5.the demo is not multi-thread application.I just use the demo.