?? ki_cntr.vhd
字號:
library IEEE;use IEEE.std_logic_1164.all;use IEEE.numeric_STD.all;use IEEE.std_logic_unsigned.all;entity ki_cntr is port (ki_end : out std_logic; Reset : in std_logic; Clk : in std_logic; ld_ki : in std_logic; ki_max : in unsigned(3 downto 0));end entity ki_cntr;architecture ki_cntr_arch of ki_cntr issignal count_N_sig : unsigned(3 downto 0);signal count_sig : unsigned(3 downto 0);beginprocess (Clk, Reset)variable count : unsigned(3 downto 0);begin if (Reset = '0') then count := (others => '0'); elsif rising_edge(Clk) then if (ld_ki = '1') then count := ki_max; else count := count_N_sig; end if; count_sig <= count;end if;end process;process (count_sig)variable ki_end_int : std_logic;variable count_N : unsigned(3 downto 0);--variable one : std_logic := '1';begin if (count_sig = "0000") then count_N := "0000"; ki_end_int := '1'; else count_N := count_sig - 1 ; ki_end_int := '0'; end if;count_N_sig <= count_N;ki_end <= ki_end_int;end process;end architecture ki_cntr_arch;
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