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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

HDL-embedded SDC commands

Good Day.

I am Trying to remove some warnings comming from I dont know where.

Regarding the (altera_reserved_tck)

On The Timequest, I see this.

Info: Evaluating HDL-embedded SDC commands

Info: Entity dcfifo_api1

Info: set_false_path -from *delayed_wrptr_g* -to *rs_dgwp|dffpipe_ed9:dffpipe16|dffe17a*

Info: set_false_path -from *rdptr_g* -to *ws_dgrp|dffpipe_fd9:dffpipe19|dffe20a*

Info: Entity dcfifo_psk1

Info: set_false_path -from *delayed_wrptr_g* -to *rs_dgwp|dffpipe_gd9:dffpipe6|dffe7a*

Info: set_false_path -from *rdptr_g* -to *ws_dgrp|dffpipe_hd9:dffpipe9|dffe10a*

Info: Entity dcfifo_s0j1

Info: set_false_path -from *delayed_wrptr_g* -to *rs_dgwp|dffpipe_vu8:dffpipe17|dffe18a*

Info: set_false_path -from *rdptr_g* -to *ws_dgrp|dffpipe_0v8:dffpipe20|dffe21a*

Info: Entity sld_hub

Info: set_clock_groups -asynchronous -group {altera_reserved_tck}

Info: create_clock -period 10MHz -name altera_reserved_tck [get_ports {altera_reserved_tck}]

Warning: At least one of the filters had some problems and could not be matched

Warning: altera_reserved_tck could not be matched with a clock

Warning: Ignored assignment: set_clock_groups -asynchronous -group [get_clocks {altera_reserved_tck}]

Warning: Argument -group with value altera_reserved_tck could not match any element of the following types: ( clk )

What is wrong on it? or how can I solve it?

Where are this HDL-embedded SDC commands read from?

Can I modify them? is it needed? or better do not play with them?

anyway. What would U recommend to avoid this warnings?

I allready try inserting in the project .sdc file the altera_reserved constraints generated from the Template but still not going away.

Thankyou!

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Could it be that the compiler did some optimization and removed/renamed the source/destination of the set_false_path path? So the TimeQuest could not find the path in the post-synthesis netlist and gave out the warning.

    I saw such warnings in my project too and It never causes any problem. Tried to manually find the source/destination node using the exact filter statement and one of the source/destination node was actually missing.