Teledyne LeCroy Voyager Exerciser Generation Script Language Manual - Manual (Page 115)

Teledyne LeCroy Voyager USB 3.0 Exerciser Generation Script Language Reference Manual
106
10.10 Initializing Struct Variables from Hex Streams
You can assign structure variables using hex streams. Rather than defining each field within a
structure variable, set the structure variable equal to a hex/byte stream. The fields within the
structure variable are then assigned based on the offset.
10.10.1 Assignments for Variables with Fixed-length Fields
For structure variables composed of fixed length fields (so that the structure variable has fixed
length), assignments by hex streams fill the fields in offset order. Any overflow from the
hex stream is truncated. For example, assigning an eight-byte structure variable to a twelve-byte
hex stream loses the last four bytes of the hex stream.
Example
Packet GenericSample
{
Field_1 : 8
Field_2 : 32
Field_3 : 16
Field_4 : 4
Field_5 : 3
Field_6 : 1
}
GenericSample $Struct_Var
Main
{
$Struct_Var = {
01 02 03 04 05 06 07 08 }
# The following is the same as the line above.
$Struct_Var{
Field_1 =
1
Field_2 = { 02 03 04 05 }
Field_3 = { 06 07 }
Field_4 = 0
Field_5 = 4
Field_6 = 0
}
}