Lucas67
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Posts: 3
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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;
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