05-04-2012 06:31 PM
in my design, there are 2 similar signals, one is ssn and another is ssn_2, the port define is below:
input [2:0] ssn;
when synthesize, ISE will report error "the net ssn_2 is not found", why?
05-05-2012 12:38 PM
the most likely I gues is that the signal is not used in th edesign,
and is optimised away, a fairly common mistake.
It does raise the question of the naming convention yoru using,
try changing ssn_2 to ssn_b
if ssn_b is reported as missing, its benn optimised away,
if it reports ssn_2, oops....
05-09-2012 03:30 AM
Actually, the signal is used.
After change ssn_2 to ssn_b, it is OK.
So I doubt that ssn_2 and ssn are treated as same in ISE naming convention.
05-09-2012 04:23 AM
an interesting quirk
but at least you have a work around.