Teledyne-lecroy UWBTrainer Exerciser Script Language Uživatelský manuál stáhnout pdf (Strana 22)

LeCroy Corporation UWBTrainer Exerciser - Generation Script Language Reference Manual

8.2 Field Definitions

You can define template fields using the following syntax:

Field_Name : [ offset, ] length [ (Byte Order attribute) ] [ = Field_Value ] [ [ list of possible values ] ]

Field_Name [: length] { Subfield definitions } [ (Byte Order attribute) [ = Field_Value ] [ [ list of

possible values ] ]

Note

: Specify all field offsets and lengths in bits. Numeric expressions with declared constants

are allowed in field offset and length definitions. All field and subfield names must be unique

inside a template.

Note

: You can define local fields for packet variable instances, register condition instructions,

and when sending a frame. See sections “Changing Structure Parser Variables” and

“Send Frame Instruction” for more information.

8.2.1 Defining a Field at a Specific Offset

If the offset parameter is in a field definition, then the field is bound to a specific offset.

Examples

const F3_OFFSET = 16

const F3_LEN = 8

# Declare the frame template 'SomeTemplate.

Frame SomeTemplate

{

F1 : 0, 16 # Declare the 16-bit field 'F1' at offset 0.

F2 : 64, 32 # Declare the 32-bit field 'F2' at offset 64.

F3 : F3_OFFSET, F3_LEN # Declare the 8-bit field 'F2' at offset 16.

F4 : F3_OFFSET + F3_LEN, 16 # Declare the 16-bit field 'F4' at

# offset 16+8.

}

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Teledyne-lecroy UWBTrainer Exerciser Script Language Uživatelský manuál Strana 22