FPGA应用举例FPGA应用举例 七段译码器 LIBRARY IEEE; USE ENTITY seven_v IS PORT( D : S : END seven_v ; ARCHITECTURE a OF BEGIN PROCESS(D) BEGIN ？？？ END PROCESS; END a; IEEE.STD_LOGIC_1164.ALL; CASE D IS WHEN 0 => S S S S S S S S S S S 半加器－（不考虑低位的进位） LIBRARY ieee; USE ieee.std_logic_1164.all; USE ieee.std_logic_unsigned.all; ENTITY hadd_v IS PORT ( A, B : IN STD_LOGIC; S, C : OUT STD_LOGIC); END hadd_v; ARCHITECTURE a OF hadd_v IS SIGNAL temp : STD_LOGIC_VEC……