Twix25
Newbie level 3
warning:xst:647
I've wrote a simple programme for shifter script in vhdl.
and i have the warning:
how I can modify the code to eliminate this problem? how i can plug the inconnected input?
I've wrote a simple programme for shifter script in vhdl.
Code:
entity L_shifter is
Port ( in_ls : in STD_LOGIC_VECTOR (31 downto 0);
out_ls : out STD_LOGIC_VECTOR (31 downto 0));
end L_shifter;
architecture Behavioral of L_shifter is
begin
out_ls <= ( in_ls (30 downto 0)& "0" );
end Behavioral;and i have the warning:
Code:
WARNING:Xst:647 - Input <in_ls<31>> is never used. This port will be preserved and left unconnected if it belongs to a top-level block or it belongs to a sub-block and the hierarchy of this sub-block is preserved.
Unit <L_shifter> synthesized.how I can modify the code to eliminate this problem? how i can plug the inconnected input?