七人表決器：七人表決，如果大于等于四人同意，則輸出為1，否則輸出為0，
LIBRARY IEEE; --七人表決器
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY VOTE IS
PORT(a,b,c,d,e,f,g:IN STD_LOGIC;
o:OUT STD_LOGIC);
END ENTITY VOTE;
ARCHITECTURE VT OF VOTE IS
BEGIN
PROCESS(a,b,c,d,e,f,g)
VARIABLE sum:INTEGER RANGE 0 TO 8;
BEGIN
IF a='1' THEN
sum:=1;
ELSE
sum:=0;
END IF;
IF b='1' THEN
sum:=sum+1;
ELSE
sum:=sum;
END IF;
IF c='1' THEN
sum:=sum+1;
ELSE
sum:=sum;
END IF;
IF d='1' THEN
sum:=sum+1;
ELSE
sum:=sum;
END IF;
IF e='1' THEN
sum:=sum+1;
ELSE
sum:=sum;
END IF;
IF f='1' THEN
sum:=sum+1;
ELSE
sum:=sum;
END IF;
IF g='1' THEN
sum:=sum+1;
ELSE
sum:=sum;
END IF;
IF sum>=4 THEN
o<='1';
ELSE
o<='0';
END IF;
END PROCESS;
END ARCHITECTURE VT;
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標籤：java