assignment_group (::quartus::project)

Belongs to ::quartus::project 5.0

Adds, removes, gets members of, or gets exceptions to
an assignment group.

The "assignment_group" command replaces the deprecated
"timegroup" command.

An assignment group is a custom group of registers and
pins. You can use the "-add_member" option to specify
register or pin names you want to include in the
assignment group. You can use the "-add_exception"
option to specify names you want to exclude from the
assignment group.

You can specify the names using wildcards, that is,
using "?"  or "*". For example, to add all registers
and pins that start with a "b" except those that start
with "b|c|" to a particular assignment group named
"group_b", type:

assignment_group "group_b" -add_member "b*" -add_exception "b|c|*"

To remove members or exceptions from a assignment
group, use the "-remove_member" or "-remove_exception"
options respectively.

The "-get_members" option returns a collection of
members in the assignment group. The "-get_exceptions"
option returns a collection of exceptions to the
assignment group. Each element of the collection is a
list in the following format:

 		{ {Assignment group name} {<Assignment name>} {<Register or pin name>} }

In lists containing members, <Assignment name> is
always "ASSIGNMENT_GROUP_MEMBER". In lists containing
exceptions, <Assignment name> is always
"ASSIGNMENT_GROUP_EXCEPTION".

To disable assignments for an entire group, use the
"-disable" option, for example:

assignment_group "group_a" -disable

To disable a particular assignment group assignment,
use the "-disable" option with the "-add_member" or
"-add_exception" options, for example:

assignment_group "group_a" -add_member "m1" -disable
assignment_group "group_a" -add_exception "e1" -disable

Assignments created or modified by using this Tcl
command are not saved to the Quartus Prime Settings File
(.qsf) unless you explicitly call one of the following
two Tcl commands:

1) export_assignments 
2) project_close (unless "-dont_export_assignments" is
specified)

The "export_assignments" and "project_close" Tcl commands
reside in the ::quartus::project Tcl package. You must
save assignment changes before you run Quartus Prime
command-line executables. Note, however, that the Tcl
commands "execute_flow" and "execute_module" (part of
the ::quartus::flow Tcl package) automatically call
"export_assignments" before they run command-line
executables.

# Make a location assignment for nodes starting
# with "r" except those starting with "r|s|"
# and except those starting with "r|t|"
assignment_group "lg1" -add_member "r*" -add_exception "r|s|*"
assignment_group "lg1" -add_exception "r|t|*"

set_location_assignment IOBANK_2 -to "lg1"

# Remove the "r1" node from assignment group "lg1"
assignment_group "lg1" -remove_member "r1"

# Display the members of assignment group "lg1"
foreach_in_collection member [assignment_group "lg1" -get_members] {
	foreach { group assignment node } $member { break }
		# Print the name of the member
		puts $node
}

# Display the exceptions to assignment group "lg1"
foreach_in_collection exception [assignment_group "lg1" -get_exceptions] {
	foreach { group assignment node } $exception { break }
		# Print the name of the exception
		puts $node
}