Altera Quartus II Scripting Instrukcja Użytkownika Pobierz pdf (Strona 150)

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3–20 Chapter 3: Tcl Packages & Commands

advanced_timing

get_timing_edge_info

Usage

get_timing_edge_info -info <info> <edge>

Options

-info <info>: Type of information

<edge>: Edge

Description

Returns the requested type of information for the specified timing edge.

Available information types include the following:

Example

# Count the number of clock edges in the design

load_package advanced_timing

project_open <design>

create_timing_netlist

set count 0

foreach_in_collection edge [get_timing_edges] {

set type [get_timing_edge_info -info type $edge]

if { [string compare $type "clock"] == 0} {

incr count

}

puts "found $count clock edges"

# Print the worst case slack on every edge

# (This assumes timing constraints exist)

compute_slack_on_edges

foreach_in_collection edge [get_timing_edges] {

set slack [get_timing_edge_info -info slack $edge]

puts "Slack is $slack"

}

project_close

Information Type Description

type Type of node (synch, asynch, clock).

src_node Source node.

dst_node Destination node.

atom_iport Corresponding atom's iterm (if any).

ic_delay IC delay of the edge.

cell_delay Cell delay of the edge.

delay_string Symbolic representation of the delay.

slack Worst case slack of the edge (Available after calling "compute_slack_on_edges").

wysiwyg_port_type Atom's iterm type.

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