OmniTek OTR 1001, User Manual

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OmniTek OTR 1001 User Guide, v3.1 I-9
Determinant Statements
BitField elements may include one or more Determinant statements. These specify one or more
bits within a group of up to 32 bits that are to act as flags, determining whether the BitField
element should be applied. If the BitField element includes a number of Determinant statements,
the results from the separate Determinant statements are ANDed i.e. all must be satisfied in order
for the BitField element to be applied.
<Determinant Attributes />
Attributes:
WordOffset=" integer " (required)
where integer identifies the word in the packet to be inspected from the start of the UDW
block/the start of the current repetition if the PacketType Repetative attribute has been set to
"true" .
e.g. WordOffset="3"
Mask=" string " (required)
where string is a Hexadecimal value that defines a mask to be applied to the data starting at the
WordOffset. At present the maximum supported length of a mask is 32 bits.
e.g. Mask="0x80"
Target=" string " (required)
where string specifies, in hex, the required value once the Mask has been applied to the data.
e.g. Target="0x80"
Allow=" boolean " (required)
where boolean is true where a positive result should allow the BitField element to be applied,
and is false where a positive result should prevent the BitField element from being applied.
e.g.
Allow="true"
Example:
<Determinant WordOffset="3" Mask="0x80" Target="0x80" Allow="true" />