TCL command to check for clock assignment

Altera_Forum · ‎01-29-2016

Hi,

I'm looking for a TCL command to find if a given port/pin has already been assigned a clock with create_clock/create_generated_clock.

Cheers.

Altera_Forum · ‎01-29-2016

This is not quite what you are asking, but I typically use the .sdc syntax:


set ports 
if { == 1} {
	set clkin_50MHz_period 20
	set name clkin_50MHz
	puts "  ==> S4GXDK: constrain clock $name"
	create_clock                    
		-period $clkin_50MHz_period 
		-name $name 
	set_clock_groups -exclusive -group $name
}

This checks to see if a clock has been used in a design, and if it has, then assigns a default clock contraint, and group.

Cheers,

Dave