Dalsa Linea HS Series, Руководство пользователя

Страница: 64 / 74

64

Appendix A: GenICam Commands
o
A return value of 0 is success. Error codes are listed in the XML.

Read FileSize to get the number of bytes in the file

From FileAccessBuffer.Length you will know that maximum number of bytes that can be read
through FileAccessBuffer is 988.

For Offset = 0 While ((Offset < FileSize) and (Status = 0)) Do
o
Set FileAccessOffset to Offset
o
Set FileAccessLength to min(FileSize - Offset, FileAccessBuffer.Length), the number of bytes
to read
o
Set the FileOperationSelector to Read
o
Read the file by setting FileOperationExecute to 1 and poll until 0 and complete
o
Read FileOperationStatus to confirm the read worked
o
Read FileOperationResult to confirm the number of bytes read
o
Read the bytes from FileAccessBuffer
o
Write bytes read to host file.

Next Offset = number of bytes read

Set the FileOperationSelector to Close

Close the file by setting FileOperationExecute to 1 and poll until 0 and complete

Read FileOperationStatus to confirm the close worked
Upload File to Camera

Select the file by setting the FileSelector feature

Set the FileOpenMode to Write

Set the FileOperationSelector to Open

Open the file by setting FileOperationExecute to 1
This is a read-write feature - poll it every 100 ms until it returns 0 to indicate it has completed

Read FileOperationStatus to confirm that the file opened correctly
A return value of 0 is success. Error codes are listed in the XML.

Read FileSize to get the maximum number of bytes allowed in the file
o
Abort and jump to Close if this is less the file size on the host

From FileAccessBuffer.Length you will know that maximum number of bytes that can be written
through FileAccessBuffer is 988.

For Offset = 0 While ((Offset < Host File Size) and (Status = 0)) Do
o
Set FileAccessOffset to Offset
o
Set FileAccessLength to min(Host File Size - Offset, FileAccessBuffer.Length), the number of
bytes to write
o
Read next FileAccessLength bytes from host file.
o
Write the bytes to FileAccessBuffer
o
Set the FileOperationSelector to Write
o
Write to the file by setting FileOperationExecute to 1 and poll until 0 and complete
o
Read FileOperationStatus to confirm the write worked
o
Read FileOperationResult to confirm the number of bytes written

Next Offset = number of bytes written

Set the FileOperationSelector to Close

Close the file by setting FileOperationExecute to 1 and poll until 0 and complete