Teledyne-lecroy Voyager Exerciser Generation Script Language Manua Instrukcja Użytkownika Pobierz pdf (Strona 130)

Teledyne LeCroy Voyager USB 3.0 Exerciser Generation Script Language Reference Manual

121

10.19.3 Nested Calls Using Global Variables

You can call another generation procedure inside a generation procedure. This is called

"nested calls". During such calls, the current values of global variables are used when the called

generation procedure is parsed.

Example

z = 18

SOME_PKT_TEMPLATE $Z # Declare a global structure variable 'Z'

# based on the template 'SOME_PKT_TEMPLATE'.

Main

{

$Y = SOME_PKT_TEMPLATE # Declare a local structure variable 'Y'

{

Field0 = z + 12 # Use a global variable 'z'.

}

z++ # Increment the global variable 'z'.

Send Y # Send packet based on the local structure variable 'Y'.

Call Block1( $Y, 12, 10 ) # Call 'Block1'.

}

Block1( SOME_PKT_TEMPLATE $p, x, y )

{

$p # Change the local structure variable 'p'.

{

Field0 = 2*(x + y) + z # Use local variables 'x', 'y' and global

# variable 'z' here.

}

Send Z # Send packet based on the global variable 'Z'.

$Z # Change the global structure variable 'Z'.

{

Field0 = 0x0000BEEF

}

$Z[0, 4] = 0xA # Change the 4 bits of structure variable 'Z'

# at offset 0 bits.

Call Block2( $p ) # Call 'Block2'.

}

Block2( SOME_PKT_TEMPLATE $p )

{

Send p # Send packet based on the local structure variable 'p'.

Send Z # Send packet based on the global structure variable 'Z'.

}

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Teledyne-lecroy Voyager Exerciser Generation Script Language Manua Instrukcja Użytkownika Strona 130