Constraints in a design

[DocIng]

I used RTL compiler from cadence.
define_clock -period 100000 -name clkin /designs/TOP/ports_in/CLK

Error : A required object parameter could not be found. [TUI-61] [path_group]
: An object of type 'instance|external_delay|clock|port|pin' named '' could not be found.
: Check to make sure that the object exists and is of the correct type. The 'what_is' command can be used to determine the type of an object.

I dont undesrtand the problem.

 

[yx.yang]

You need speicfy which PIN or Port this clock is mounted on.
In DC (synopsys Design compiler), there is some command like: get_pins "/designs/TOP/ports_in/CLK" to get that port or pin.

Or you can "man define_clock" in RC tool to get help and see some examples.

 

[DocIng]

Every port, bus, clock, subdesign and constraints are stored as virtual foldersaccessible from RTL Compiler command window.
the top level input ports are stored in /designs/TOP/ports_in
clkin will be connected to CLK input of TOP module
get_pins /designs/TOP/ports_in/CLK cannot find any pins.

 

[englishdogg]

try this
define_clock -period 100000 -name clkin [find / -port CLK]

 

[ThisIsNotSam]

Every port, bus, clock, subdesign and constraints are stored as virtual foldersaccessible from RTL Compiler command window.
the top level input ports are stored in /designs/TOP/ports_in
clkin will be connected to CLK input of TOP module
get_pins /designs/TOP/ports_in/CLK cannot find any pins.

you cannot use the command get_pin on a port.

 

[kannanunni]

I used RTL compiler from cadence.
define_clock -period 100000 -name clkin /designs/TOP/ports_in/CLK

Error : A required object parameter could not be found. [TUI-61] [path_group]
: An object of type 'instance|external_delay|clock|port|pin' named '' could not be found.
: Check to make sure that the object exists and is of the correct type. The 'what_is' command can be used to determine the type of an object.

I dont undesrtand the problem.

Try this : define_clock -period 100000 -name clkin [get_clocks CLK]

 

[ThisIsNotSam]

Try this : define_clock -period 100000 -name clkin [get_clocks CLK]

this is not correct, you need to use a pin/port, not another clock.