Hi All, How can I create the timing constraints (set_input/output_delay) for all ports (excepting clocks and reset ports)? Let's say the design has the following clocks: clk0, clk1, clk2 and following resets: rstn0, rstn1, rstn2 and hundreds of other ports. How can I write a script, which set input delays of 0ns for all input ports (excepting clk0, clk1, clk2, rstn0, rstn1, rstn2) and output delays of 0ns for all output ports? Thank you!

I don't quite understand what you want to accomplish here. Your input and output delays could be 0 for a *minimum* delay, but you also need a matching *maximum* delay. The range of delay is required to give the Fitter an idea of what it has to work with as to the placement of the input or output register. set_input_delay -clock <virtual clock that drives upstream device> -max [get_ports in*] <max external delay based on tco of upstream device and board delays> set_input_delay -clock <virtual clock that drives upstream device> -min [get_ports in*] 0 set_output_delay -clock <virtual clock that drives downstream device> -max [get_ports out*] <max external delay based on tsu of downstream device and board delays> set_output_delay -clock <virtual clock that drives downstream device> -min [get_ports out*] 0

Does the [get_ports out*] list all the output ports and [get_ports in*] list all the input ports? How can I exclude certain ports from these listings? Is it possible to work with collections here? How to remove the input/output delay constraints from the certain ports? Thank you!

When I run the get_ports out* command from Quartus console, I'm receiving the following errors? Error:ERROR: Quartus Prime Tcl command "get_ports" is only available for use in the following executables: Error: quartus_fit Error: quartus_sta Error: while executing Error: get_ports out* Why? How to fix?

I used in* and out* as examples. You have to put in your own port names.

this is exactly what I asked for :-) how to list ALL input ports without listing each port separately! How can I make a collection (list) of ALL the input ports (something like 'create_collection all_inputs')?

[SDC] Input/Output delay for All ports -> script writing

25 Replies

Altera_Forum
Honored Contributor
8 years ago
set_input_delay [get_ports * ] ... =====>the * wildcard covers all the input ports
remove_input_delay [get_ports clk] ===> will remove the input delay on the specified port

Same thing for output delay.
http://quartushelp.altera.com/15.0/mergedprojects/tafs/tafs/tcl_pkg_sdc_ver_1.5_cmd_remove_input_delay.htm
Altera_Forum
Honored Contributor
8 years ago
--- Quote Start ---
Just use all_inputs or all_outputs as your collection.
--- Quote End ---

OK, how could I list all the elements in these collections? What are the generated collections names?

Altera_Forum

Honored Contributor

8 years ago

--- Quote Start ---

OK, how could I list all the elements in these collections? What are the generated collections names?

--- Quote End ---

I have a TCL script that has these lines in it to create files with the various 'collections' contents listed:


set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan
set chan 
foreach_in_collection element  {
    puts $chan ]
}
close $chan

Altera_Forum
Honored Contributor
8 years ago
I tried to run the ferst example:
----------------------------------------------------------------------
set chan [open "TQ_all_clocks.rpt" "w"]
foreach_in_collection element [all_clocks] {
puts $chan [concat $element : [get_object_info -name $element]]
}
close $chan
----------------------------------------------------------------------

The 'all_clocks' command is not recognized (ran from the Tcl Console). I've got the following:
----------------------------------------------------------------------
Error:ERROR: Quartus Prime Tcl command "all_clocks" is only available for use in the following executables:
Error: quartus_fit
Error: quartus_sta
Error: while executing
Error:"all_clocks"
Error: invoked from within
Error:"foreach_in_collection element [all_clocks] { puts $chan [concat $element : [get_object_info -name $element]]}"
----------------------------------------------------------------------

So, what's the problem? How could be fixed?

Thank you!
Altera_Forum
Honored Contributor
8 years ago
--- Quote Start ---
I tried to run the ferst example:
----------------------------------------------------------------------
set chan [open "TQ_all_clocks.rpt" "w"]
foreach_in_collection element [all_clocks] {
puts $chan [concat $element : [get_object_info -name $element]]
}
close $chan
----------------------------------------------------------------------

The 'all_clocks' command is not recognized (ran from the Tcl Console). I've got the following:
----------------------------------------------------------------------
Error:ERROR: Quartus Prime Tcl command "all_clocks" is only available for use in the following executables:
Error: quartus_fit
Error: quartus_sta
Error: while executing
Error:"all_clocks"
Error: invoked from within
Error:"foreach_in_collection element [all_clocks] { puts $chan [concat $element : [get_object_info -name $element]]}"
----------------------------------------------------------------------

So, what's the problem? How could be fixed?

Thank you!
--- Quote End ---

Ok, so here is my complete example. Previously I just posted snippets but they need to be run in the correct context.

I run this on the command line:
$(QUARTUS_BIN)/quartus_sta -t generate_timing.tcl $(DESIGN) 10

Where the contents of the file generate_timing.tcl is as follows:

set projname set numpaths project_open $projname create_timing_netlist read_sdc set_operating_conditions -model slow -grade c update_timing_netlist report_timing -setup -npaths $numpaths -detail path_only -file "TQ_setup_slow.rpt" set_operating_conditions -model fast -grade c update_timing_netlist report_timing -hold -npaths $numpaths -detail path_only -file "TQ_hold_fast.rpt" report_exceptions -file "TQ_exceptions.rpt" set chan foreach_in_collection reg { puts $chan ] } close $chan set chan foreach_in_collection reg { puts $chan ] } close $chan set chan foreach_in_collection reg { puts $chan ] } close $chan set chan foreach_in_collection reg { puts $chan ] } close $chan set chan foreach_in_collection cell { puts $chan ] } close $chan set chan foreach_in_collection pin { puts $chan ] } close $chan set chan foreach_in_collection net { puts $chan ] } close $chan set chan foreach_in_collection port { puts $chan ] } close $chan set chan foreach_in_collection clk { puts $chan ] } close $chan set chan foreach_in_collection keeper { puts $chan ] } close $chan exit
Altera_Forum
Honored Contributor
8 years ago
where do you run the script? from outside of the Quartus? But ow can I run the same commands from the TCL Console (from inside of Quartus)?
Altera_Forum
Honored Contributor
8 years ago
--- Quote Start ---
where do you run the script? from outside of the Quartus? But ow can I run the same commands from the TCL Console (from inside of Quartus)?
--- Quote End ---

As I indicated I run the commands from the command line using this command:

quartus_sta -t generate_timing.tcl MY_DESIGN 10

so the tcl script is fed to the Quartus Static Timing Analyzer (quartus_sta) application.

So basically the tcl command script in the file is run on the TCL console within the quartus_sta application.
Altera_Forum
Honored Contributor
8 years ago
If run from a script, then the following are necessary:
set projname [lindex $quartus(args) 0]
set numpaths [lindex $quartus(args) 1]
project_open $projname

Most scripts I run I launch TimeQuest on the project and double-click on Update Timing Netlist, which does the following:
create_timing_netlist
read_sdc
set_operating_conditions -model slow -grade c
update_timing_netlist

At that point I run a timing analysis script or whatever I need to do.
Altera_Forum
Honored Contributor
8 years ago
--- Quote Start ---
If run from a script, then the following are necessary:
create_timing_netlist
read_sdc
update_timing_netlist

--- Quote End ---

Why this order? Intuitively I'd do it in this order:
read_sdc
create_timing_netlist

Why this order will not work?
Altera_Forum
Honored Contributor
8 years ago
--- Quote Start ---
Why this order? Intuitively I'd do it in this order:
read_sdc
create_timing_netlist

Why this order will not work?
--- Quote End ---

You have to create the timing netlist before you can apply the sdc commands to it ... doesn't work the other way around.

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[SDC] Input/Output delay for All ports -> script writing

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