Example – Altera Quartus II Scripting User Manual

Page 627

Chapter 3: Tcl Packages & Commands

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timing_assignment

Altera Corporation

Quartus II Scripting Reference Manual

■

export_assignments

■

project_close (unless "-dont_export_assignments" is specified)

These two Tcl commands reside in the ::quartus::project Tcl package. You must save assignment changes
before you run Quartus®II 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.

Example

## Multicycle "setup" from reg1 and reg2 to any destination points
assignment_group "src_group" -add_member reg1
assignment_group "src_group" -add_member reg2
set_multicycle_assignment 2 -setup -from "src_group"

## or
assignment_group "src_group" -add_member reg1
assignment_group "src_group" -add_member reg2
assignment_group "dst_group" -add_member *
set_multicycle_assignment 2 -setup -from "src_group" -to "dst_group"

## Source multicycle "setup" to reg1 and reg2 from any source points
assignment_group "dst_group" -add_member reg1
assignment_group "dst_group" -add_member reg2
set_multicycle_assignment 2 -setup -start -to "dst_group"

## or
assignment_group "dst_group" -add_member reg1
assignment_group "dst_group" -add_member reg2
assignment_group "src_group" -add_member *
set_multicycle_assignment 2 -setup -start -from "src_group" -to \
"dst_group"

## Source multicycle "hold" from src1 to dst1 and dst2 and
## from src2 to dst1 and dst2
assignment_group "src_group" -add_member src1
assignment_group "src_group" -add_member src2
assignment_group "dst_group" -add_member dst1
assignment_group "dst_group" -add_member dst2
set_multicycle_assignment 2 -hold -from "src_group" -to "dst_group"

## Source multicycle "hold" from registers clocked by clk1
## to registers clocked by clk2
## Timegroups are useful for making assignments to
## more than one node. Timegroups are not necessary
## for making an assignment from only one clock node
## to another clock
set_multicycle_assignment 2 -hold -start -from clk1 -to clk2