Đây là code thanh ghi dich
library ieee ;
use ieee.std_logic_1164.all;
---------------------------------------------------
entity shift_reg is
port(
Din :in std_logic_vector(7 downto 0);
clock: in std_logic;
shift_enable: in std_logic;
Dout: out std_logic_vector(7 downto 0)
);
end shift_reg;
---------------------------------------------------
architecture behv of shift_reg is
-- initialize the declared signal
signal S:std_logic_vector(7 downto 0);
signal a:std_logic;
begin
a<=Din(7);
process(clock, shift_enable, Din)
begin
-- everything happens upon the clock changing
if clock'event and clock='1' then
if shift_enable = '1' then
S <= a & Din(7 downto 1);
else S<=Din;
end if;
end if;
end process;
-- concurrent assignment
Dout <= S;
end behv;
Code của file test
library ieee;
use IEEE.Std_logic_1164.all;
use IEEE.Std_logic_arith.all;
entity test_shifter_reg is
end test_shifter_reg;
architecture behv of test_shifter_reg is
signal Din:std_logic_vector(7 downto 0);
signal clock:std_logic:='0';
signal shift_enable:std_logic;
signal Dout:std_logic_vector(7 downto 0);
component shifter_reg is
port(
Din : in std_logic_vector(7 downto 0);
clock: in std_logic;
shift_enable: in std_logic;
Dout: out std_logic_vector(7 downto 0)
);
end component;
begin
create_clockrocess
begin
wait for 15 ns;
clock<=not clock after 50 ns;
end process create_clock;
create_datarocess
begin
Din<="10001100";
shift_enable<='0';
wait for 10 ns;
shift_enable<='1';
wait for 100 ns;
shift_enable<='0';
wait;
end process create_data;
DUT:component shifter_reg
port map(Din=>Din,clock=>clock,shift_enable=>shift_enab le,Dout=>Dout);
end behv;
Lỗi
** Error: test_shifter_reg.vhd(44): Bad default binding for component instance "dut : shifter_reg".
# (Component port "clock" is not on the entity.)
# ** Warning: [1] test_shifter_reg.vhd(44): (vopt-3473) Component instance "dut : shifter_reg" is not bound.
# Optimization failed
# Error loading design
# Error: Error loading design
# Pausing macro execution
# MACRO ./run.do PAUSED at line 6
Rất mong mọi người chỉ giáo,em sửa mãi rồi ko được
library ieee ;
use ieee.std_logic_1164.all;
---------------------------------------------------
entity shift_reg is
port(
Din :in std_logic_vector(7 downto 0);
clock: in std_logic;
shift_enable: in std_logic;
Dout: out std_logic_vector(7 downto 0)
);
end shift_reg;
---------------------------------------------------
architecture behv of shift_reg is
-- initialize the declared signal
signal S:std_logic_vector(7 downto 0);
signal a:std_logic;
begin
a<=Din(7);
process(clock, shift_enable, Din)
begin
-- everything happens upon the clock changing
if clock'event and clock='1' then
if shift_enable = '1' then
S <= a & Din(7 downto 1);
else S<=Din;
end if;
end if;
end process;
-- concurrent assignment
Dout <= S;
end behv;
Code của file test
library ieee;
use IEEE.Std_logic_1164.all;
use IEEE.Std_logic_arith.all;
entity test_shifter_reg is
end test_shifter_reg;
architecture behv of test_shifter_reg is
signal Din:std_logic_vector(7 downto 0);
signal clock:std_logic:='0';
signal shift_enable:std_logic;
signal Dout:std_logic_vector(7 downto 0);
component shifter_reg is
port(
Din : in std_logic_vector(7 downto 0);
clock: in std_logic;
shift_enable: in std_logic;
Dout: out std_logic_vector(7 downto 0)
);
end component;
begin
create_clockrocess
begin
wait for 15 ns;
clock<=not clock after 50 ns;
end process create_clock;
create_datarocess
begin
Din<="10001100";
shift_enable<='0';
wait for 10 ns;
shift_enable<='1';
wait for 100 ns;
shift_enable<='0';
wait;
end process create_data;
DUT:component shifter_reg
port map(Din=>Din,clock=>clock,shift_enable=>shift_enab le,Dout=>Dout);
end behv;
Lỗi
** Error: test_shifter_reg.vhd(44): Bad default binding for component instance "dut : shifter_reg".
# (Component port "clock" is not on the entity.)
# ** Warning: [1] test_shifter_reg.vhd(44): (vopt-3473) Component instance "dut : shifter_reg" is not bound.
# Optimization failed
# Error loading design
# Error: Error loading design
# Pausing macro execution
# MACRO ./run.do PAUSED at line 6
Rất mong mọi người chỉ giáo,em sửa mãi rồi ko được
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