Teledyne LeCroy Voyager Exerciser Generation Script Language Manual - Manual (Page 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'.
}