FPGA学习系列 各种门器件程序积累

1. 两输入与（and）门

entity and2gate is
Port ( x : in STD_LOGIC;
y : in STD_LOGIC;
z : out STD_LOGIC);
end and2gate;

architecture Behavioral of and2gate is

begin
z <= x and y;

end Behavioral;

2.两输入或（or）门

entity or2gate is
Port ( x : in STD_LOGIC;
y : in STD_LOGIC;
z : out STD_LOGIC);
end or2gate;

architecture Behavioral of or2gate is

begin
z <= x or y;

end Behavioral;

3.一输入非（not）门

entity notgate is
Port ( x : in STD_LOGIC;
y : out STD_LOGIC);
end notgate;

architecture Behavioral of notgate is

begin
y <= not x;

end Behavioral;

2.两输入与非（nand）门

entity nand2gate is
Port ( x : in STD_LOGIC;
y : in STD_LOGIC;
z : out STD_LOGIC);
end nand2gate;

architecture Behavioral of nand2gate is

begin
z <= x nand y;

end Behavioral;

5.两输入或非（nor）门

entity nor2gate is
Port ( x : in STD_LOGIC;
y : in STD_LOGIC;
z : out STD_LOGIC);
end nor2gate;

architecture Behavioral of nor2gate is

begin
z <= x nor y;

end Behavioral;

6.两输入异或（xor）门

entity xor2gate is
Port ( x : in STD_LOGIC;
y : in STD_LOGIC;
z : out STD_LOGIC);
end xor2gate;

architecture Behavioral of xor2gate is

begin
z <= x xor y;

end Behavioral;

6.两输入异或（xnor）门

entity xnor2gate is
Port ( x : in STD_LOGIC;
y : in STD_LOGIC;
z : out STD_LOGIC);
end xnor2gate;

architecture Behavioral of xnor2gate is

begin
z <= x xnor y;

end Behavioral;

FPGA学习系列 各种门器件程序积累

原文：http://www.cnblogs.com/panlangen/p/7642936.html