File Access Control
    • 02 Jul 2024
    • 3 Minutes to read
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    File Access Control

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    Article summary

    In general, make sure to always use consistent packages as delivered by Chromasens and do not mix files from different packages!

    File Selector

    Name

    FileSelector

    Standard

    Description

    Select a file to read/write.

    Interface

    Enumeration

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    See enum entries table below.

    Default value

    NoFile

    Availability

    ALL

    Notes

    -

    Error behavior

    See the device error code documentation.

    File Selector Enum Entries:

    Name

    Description

    NoFile

    No file selected

    Bitstream

    Enables bitstream access

    Application

    Enables application access

    Xml

    Enables GenICam XML access

    DSNULUT1

    Enables DSNU LUT 1 access1

    DSNULUT2

    Enables DSNU LUT 2 access1

    PRNULUT1

    Enables PRNU LUT 1 access1

    PRNULUT2

    Enables PRNU LUT 2 access1

    SensorFile

    Enables Sensor File access

    GammaLUT

    Enables Gamma LUT access

    UserSet1

    Enables User set 1 access

    UserSet2

    Enables User set 2 access

    UserSet3

    Enables User set 3 access

    UserSet4

    Enables User set 4 access

    UserSet5

    Enables User set 5 access

    UserSet6

    Enables User set 6 access

    UserSet7

    Enables User set 7 access

    UserSet8

    Enables User set 8 access

    LightCtrlSet1

    Enables Light controller set 1 access (Not for allPIXA Evo)

    PackageDescriptionFile

    Enables Package Description File access

    MemoryFile

    Enables memory file access

    IOAnalyzerEventFile

    Enables IO Analyzer Event File access

    LogFile

    Firmware logging (For debugging purposes)

    CustomerFile

    File for customer or application specific data. It can be any file content. The file size is 1MB.

    1 If the LUT is enabled in the image processing unit, it will be updated with the newly downloaded file.

    File Operation Selector

    Name

    FileOperationSelector[FileSelector]

    Standard

    Description

    Select an operation which shall be performed on a file.

    Interface

    Enumeration

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    See enum entries table below.

    Default value

    NoOperation

    Availability

    ALL

    Notes

    -

    Error behavior

    See the device error code documentation.

    File Operation Selector Enum Entries:

    Name

    Description

    Notes

    NoOperation

    Selects no operation

    -

    Open

    Open a file

    Fails if a file is already opened.

    Close

    Close a file

    When this command is executed, the file is verified and internally copied. This is a time-consuming process.

    A file is always closed, even if an error occurs.

    The File Operation Status is set appropriately. Therefore Success indicates a successful file update and Failure an erroneous update.

    If a Fatal Error occurs, the File Operation Status is set to Fatal Error. In this case you must not switch off the camera if the file type is one of the following:

    • Bitstream
    • Application
    • XML
    • Bootfile (sensorfile)

    For these files, please try to download the file again to avoid damage!
    For other files you may switch off the camera.

    In general, make sure to always use consistent packages as delivered by chromasens and do not mix files from different packages!

    Read

    Read a file

    -

    Write

    Write a file

    -

    File Operation Execute

    Name

    FileOperationExecute[FileOperationSelector]

    Standard

    Description

    Executes the selected file operation.

    Interface

    Command

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    {0,1}

    Default value

    1

    Availability

    ALL

    Notes

    To check whether the operation is finished, read the value of the FileOperationExecute command periodically. If the value is not equal to the commands value of the node in the xml, the command has finished execution.

    Error behavior

    See the device error code documentation.

    File Open Mode

    Name

    FileOpenMode

    Standard

    Description

    Select an open mode.

    Interface

    Enumeration

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    See enum entries table below.

    Default value

    NoOpenMode

    Availability

    ALL

    Notes

    -

    Error behavior

    See the device error code documentation.

    File Open Mode Enum Entries:

    Name

    Description

    Notes

    NoOpenMode

    No open mode selected

    -

    Read

    Open a file in read-only mode

    -

    Write

    Open a file in write-only mode

    With this open mode no read command is permitted.

    In addition, if the FileAccessOffset is set after a write command occurred, the new value of the FileAccessOffset must be at least new_FileAccessOffset = (old_FileAccessOffset+ old_FileAccessLength).

    File Access Offset

    Name

    FileAccessOffset[FileOperationSelector]

    Standard

    Description

    Controls the starting position of the access in the file.

    Interface

    Integer

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    ≥0

    Default value

    0

    Availability

    ALL

    Notes

    The unit is Byte. Please see Write for restrictions.

    Error behavior

    See the device error code documentation.

    File Access Length

    Name

    FileAccessLength[FileOperationSelector]

    Standard

    Description

    Controls the length of the mapping between the device file storage and the FileAccessBuffer.

    Interface

    Integer

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    ≥0

    Default value

    0

    Availability

    ALL

    Notes

    The unit is Byte. Please see Write for restrictions.

    Error behavior

    See the device error code documentation.

    File Operation Result

    Name

    FileOperationResult[FileOperationSelector]

    Standard

    Description

    The number of the successfully read/written bytes of the last file operation.

    Interface

    Integer

    Access mode

    Read only

    Adjustable

    while grabbing

    -

    Value range

    ≥0

    Default value

    0

    Availability

    ALL

    Notes

    -

    Error behavior

    -

    File Operation Status

    Name

    FileOperationStatus[FileOperationSelector]

    Standard

    Description

    Status of recent operation.

    Interface

    Enumeration

    Access mode

    Read only

    Adjustable

    while grabbing

    -

    Value range

    See enum entries table below.

    Default value

    Success

    Availability

    ALL

    Notes

    -

    Error behavior

    -

    File Operation Status Enum Entries:

    Name

    Description

    Notes

    Success

    The last operation succeeded

    -

    Failure

    The last operation failed

    -

    FatalError

    If this error occurs, do not switch off the device and repeat the update immediately! Otherwise, the system may refuse to boot next time!

    A fatal error occurred during the last operation. Please see the Close command for more information.

    File Size

    Name

    FileSize[FileSelector]

    Standard

    Description

    Represents the size of the selected file in bytes.

    Interface

    Integer

    Access mode

    Read only

    Adjustable

    while grabbing

    -

    Value range

    ≥0

    Default value

    0

    Availability

    ALL

    Notes

    -

    Error behavior

    See the device error code documentation.

    File Checksum

    Name

    FileChecksum[FileSelector]

    Custom

    Description

    The checksum of a file.

    Interface

    Integer

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    ≥0

    Default value

    0

    Availability

    ALL

    Notes

    This feature must be set by the user after the file is opened and before the file is closed if a file is uploaded to the camera. Only if the checksum feature corresponds to the checksum calculated internally by the camera, the file download succeeds. For reading operations there is no need to set the checksum feature.

    Calculation:

    The checksum is an unsigned 32-bit value. It is the sum of all 4-Byte words (Little Endian) of the file. If a files size is not a multiple of four, the “missing” bytes are interpreted as zero.

    Pseudo code for calculation:

    u32 file[N]

    u32 checksum = 0

    checksum += file[0]

    checksum += file[1]

    checksum += file[N-1]

    Error behavior

    See the device error code documentation.

    File Access Buffer

    Name

    FileAccessBuffer

    Standard

    Description

    This buffer is used for the GenICam file update mechanism.

    Interface

    Register

    Size

    65536

    Access mode

    Read/Write

    Adjustable

    while grabbing

    Yes

    Value range

    -

    Availability

    ALL

    Default value

    -

    Notes

    See the device error code documentation.


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