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なぜModelSimはコンポーネントのインスタンス化i1について文句を言いますか？なぜ**警告：NUMERIC_STD.TO_INTEGER：メタバールが検出され、0を返しますか？
時間：0 psの反復：1インスタンス：/ vhdl2_uppgift_1_extra_vhd_tst/I1
**警告：NUMERIC_STD.TO_INTEGER：metavalueは0
LIBRARY ieee;
USE ieee.std_logic_1164.all;
use ieee.numeric_std.all;
LIBRARY work;
--Add in do-file
--set StdArithNoWarnings 1
---run 0 ns;
---set StdArithNoWarnings 0
---run 20 ms;
ENTITY vhdl2_uppgift_1_extra_vhd_tst IS
END vhdl2_uppgift_1_extra_vhd_tst;
ARCHITECTURE vhdl2_uppgift_1_extra_arch OF vhdl2_uppgift_1_extra_vhd_tst IS
-- constants
constant sys_clk_period: TIME:=20 ns;
-- signals
SIGNAL CLOCK_50 : STD_LOGIC;
SIGNAL KEY : STD_LOGIC_VECTOR(2 DOWNTO 0);
SIGNAL reset_n : STD_LOGIC;
SIGNAL VGA_B : STD_LOGIC_VECTOR(7 DOWNTO 0);
SIGNAL VGA_BLANK_N : STD_LOGIC;
SIGNAL VGA_CLK : STD_LOGIC;
SIGNAL VGA_G : STD_LOGIC_VECTOR(7 DOWNTO 0);
SIGNAL VGA_HS : STD_LOGIC;
SIGNAL VGA_R : STD_LOGIC_VECTOR(7 DOWNTO 0);
SIGNAL VGA_VS : STD_LOGIC;
SIGNAL x : STD_LOGIC_VECTOR(9 DOWNTO 0);
SIGNAL y : STD_LOGIC_VECTOR(9 DOWNTO 0);
COMPONENT vhdl2_uppgift_1_extra
PORT (
CLOCK_50 : IN STD_LOGIC;
KEY : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
reset_n : IN STD_LOGIC;
VGA_B : BUFFER STD_LOGIC_VECTOR(7 DOWNTO 0);
VGA_BLANK_N : BUFFER STD_LOGIC;
VGA_CLK : BUFFER STD_LOGIC;
VGA_G : BUFFER STD_LOGIC_VECTOR(7 DOWNTO 0);
VGA_HS : BUFFER STD_LOGIC;
VGA_R : BUFFER STD_LOGIC_VECTOR(7 DOWNTO 0);
VGA_VS : BUFFER STD_LOGIC;
x : BUFFER STD_LOGIC_VECTOR(9 DOWNTO 0);
y : BUFFER STD_LOGIC_VECTOR(9 DOWNTO 0)
);
END COMPONENT;
BEGIN
i1 : vhdl2_uppgift_1_extra
PORT MAP (
-- list connections between master ports and signals
CLOCK_50 => CLOCK_50,
KEY => KEY,
reset_n => reset_n,
VGA_B => VGA_B,
VGA_BLANK_N => VGA_BLANK_N,
VGA_CLK => VGA_CLK,
VGA_G => VGA_G,
VGA_HS => VGA_HS,
VGA_R => VGA_R,
VGA_VS => VGA_VS,
x => x,
y => y
);
clock : PROCESS
-- variable declarations
BEGIN
CLOCK_50 <= '0';
wait for sys_clk_period/2;
CLOCK_50 <= '1';
wait for sys_clk_period/2;
END PROCESS clock;
-----------------------
reset_n <= '0', '1' after 10*sys_clk_period;
-----------------------
always : PROCESS
BEGIN
-- code executes for every event on sensitivity list
KEY <= "110";
wait for 20 ms;
WAIT;
END PROCESS always;
-----------------------
compare: PROCESS(x,y)
VARIABLE VGA_HS_error : BOOLEAN := FALSE;
VARIABLE VGA_VS_error : BOOLEAN := FALSE;
VARIABLE VGA_BLANK_error : BOOLEAN := FALSE;
VARIABLE VGA_CLK_PHASE_error : BOOLEAN := FALSE;
VARIABLE VGA_CLK_COUNTER : INTEGER :=0;
VARIABLE CLOCK_50_COUNTER : INTEGER :=0;
VARIABLE VGA_CLK_FREQUENCY_ERROR : BOOLEAN := FALSE;
BEGIN
--VGA_HS
if TO_INTEGER(unsigned(x)) >= 659 AND TO_INTEGER(unsigned(x)) < 756 then
if VGA_HS /= '0' then
VGA_HS_error:= true;
end if;
ASSERT VGA_HS = '0'
REPORT "FAIL on VGA_HS"
SEVERITY ERROR; -- eller stanna simulatorn: SEVERITY FAILURE;
-- eller REPORT "FAIL on VGA_HS signal on horizontal position " & integer'image(x);
end if;
--VGA_VS
if TO_INTEGER(unsigned(y)) = 493 then
if VGA_VS = '1' then
VGA_VS_error:= true;
end if;
ASSERT VGA_VS = '0'
REPORT "FAIL on VGA_VS"
SEVERITY ERROR; -- eller stanna simulatorn: SEVERITY FAILURE;
end if;
--VGA_BLANK_N
if TO_INTEGER(unsigned(x)) < 640 and TO_INTEGER(unsigned(y)) < 480 then
if VGA_BLANK_N /= '1' then
VGA_BLANK_error:= true;
end if;
ASSERT VGA_BLANK_N = '1'
REPORT "VGA_BLANK_N"
SEVERITY ERROR; -- eller stanna simulatorn: SEVERITY FAILURE;
end if;
--VGA_CLK
if rising_edge(VGA_CLK)AND NOT rising_edge(CLOCK_50) then
VGA_CLK_PHASE_error :=true;
ASSERT rising_edge(CLOCK_50)
REPORT "FAIL on VGA_CLK"
SEVERITY ERROR; -- eller stanna simulatorn: SEVERITY FAILURE;
end if;
END PROCESS compare;
vga_clk_test:process
VARIABLE TIME_VGA_CLK_RISING : TIME;
VARIABLE TIME_VGA_CLK_FALLING : TIME;
VARIABLE TIME_DIFF : TIME;
begin
WAIT UNTIL rising_edge(VGA_CLK);
TIME_VGA_CLK_RISING := now;
WAIT UNTIL falling_edge(VGA_CLK);
TIME_VGA_CLK_FALLING := now;
TIME_DIFF := TIME_VGA_CLK_FALLING - TIME_VGA_CLK_RISING;
REPORT "TEST 11: Half-periodtime : " & time'image(TIME_DIFF);
IF TIME_DIFF = 20000 ps THEN
REPORT "TEST 11: OK VGA_CLK ";
ELSE
REPORT "TEST 11: ERROR VGA_CLK";
END IF;
wait;
end process vga_clk_test;
END vhdl2_uppgift_1_extra_arch;
0ナノ秒で、そのため、無効な値（おそらく "UUUU"）でto_integerを実行しています。デザインをリセットして間違っていることを示すまで、これらの警告のいくつかは予期されます。しかし、リセット後にそれらを取得した場合、あなたは問題があります。 –
しかし、私はreset_n <= '0'をやっています！ 変更する必要はありますか？ –
同じタイプの後続の警告を停止する必要があります。 –