The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design Languages >> VHDL-AMS >> Warning signal with smash
https://designers-guide.org/forum/YaBB.pl?num=1215166480

Message started by Lucas67 on Jul 4^th, 2008, 3:14am

Title: Warning signal with smash
Post by Lucas67 on Jul 4^th, 2008, 3:14am

Hello,

I begin in VHDL-AMS and I try to use the software SMASH.

I wrote a little program. When I compil it, I have one warning :

"WARNING: signal 'COUPLE' is not driven by any gate or process output."

What is the matter ?

This is my program :

>>> VHDL

library IEEE;
use IEEE.math_real.all;
use IEEE.mechanical_systems.all;
use IEEE.std_logic_1164.all;

ENTITY car IS
GENERIC (M:mass:=1500.0);
PORT (SIGNAL couple : IN REAL);
END ENTITY;

ARCHITECTURE behav OF car IS
CONSTANT roue: real:=0.2;
QUANTITY acc : acceleration ;
QUANTITY vitesse : velocity ;
BEGIN
acc == couple/(M*roue);
vitesse'dot == acc;
END ARCHITECTURE behav;

ENTITY TB IS
END;
use WORK.ALL;
ARCHITECTURE One OF TB IS
SIGNAL couple : real ;
BEGIN
voituretest : ENTITY car (behav)
PORT MAP (couple);
couple <= 50.0;
END ARCHITECTURE One;

Title: Re: Warning signal with smash
Post by alinalin19832007 on Jul 13^th, 2008, 12:46pm

hi
I think u have to put the signal couple in a process in TB

Title: Re: Warning signal with smash
Post by Lucas67 on Sep 16^th, 2008, 12:30am

You're right. the signal couple is in a process in TB.

I changed that and the warning disappear.

Thank you very much for your help.