我是VHDL的新手并跟随xilinx提供的实验室,但我在某个方面迷失了方向。在其中一个实验室中,我做了2位宽2to1多路复用器。在我目前的实验室中,我应该使用两个旧的多路复用器来构建一个3to1多路复用器。它根本没有解释如何做到这一点,所以我在这个黑暗中采取了刺。我收到以下错误代码。
[HDL 9-806]" end"附近的语法错误。 [" C:/ Nexys 4> Projects / lab1_5_dataflow / lab1_5_dataflow.srcs / sources_1 / new / mux_2bit_3_to_1_dat> aflow.vhd":48]
[HDL 9-806]";"附近的语法错误。 [" C:/ Nexys 4> Projects / lab1_5_dataflow / lab1_5_dataflow.srcs / sources_1 / new / mux_2bit_3_to_1_dat> aflow.vhd":52]
[HDL 9-806]" =>"附近的语法错误。 [" C:/ Nexys 4> Projects / lab1_5_dataflow / lab1_5_dataflow.srcs / sources_1 / new / mux_2bit_3_to_1_dat> aflow.vhd":55]
[HDL 9-806]";"附近的语法错误。 [" C:/ Nexys 4> Projects / lab1_5_dataflow / lab1_5_dataflow.srcs / sources_1 / new / mux_2bit_3_to_1_dat> aflow.vhd":59]
[HDL 9-806]" =>"附近的语法错误。 [" C:/ Nexys 4> Projects / lab1_5_dataflow / lab1_5_dataflow.srcs / sources_1 / new / mux_2bit_3_to_1_dat> aflow.vhd":62]
这是我的主要源文件的代码。
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity mux_2bit_3_to_1_dataflow is
Port ( u : in STD_LOGIC_VECTOR (1 downto 0);
v : in STD_LOGIC_VECTOR (1 downto 0);
w : in STD_LOGIC_VECTOR (1 downto 0);
s : in STD_LOGIC_VECTOR (1 downto 0);
o : out STD_LOGIC_VECTOR (1 downto 0));
end mux_2bit_3_to_1_dataflow;
architecture Behavioral of mux_2bit_3_to_1_dataflow is
component mux_2bit_2_to_1 port
(
x, y : in STD_LOGIC_VECTOR;
s : in STD_LOGIC;
m : out STD_LOGIC_VECTOR
) end component;
signal a : STD_LOGIC_VECTOR;
begin
mux1 : mux_2bit_2_to_1 port map (
x => u; LINE 52
y => v;
s => s(1);
m => a LINE 55
);
mux2 : mux_2bit_2_to_1 port map (
x => a; LINE 59
y => w;
s => s(0);
m => o; LINE 62
);
end Behavioral;
这是我添加到项目中的2到1 mux的源文件。
entity mux_2bit_2_to_1 is
Port ( x : in STD_LOGIC_VECTOR (1 downto 0);
y : in STD_LOGIC_VECTOR (1 downto 0);
s : in STD_LOGIC;
m : out STD_LOGIC_VECTOR (1 downto 0));
end mux_2bit_2_to_1;
architecture Behavioral of mux_2bit_2_to_1 is
begin
m(0) <= (x(0) and not s) or (y(0) and s);
m(1) <= (x(1) and not s) or (y(1) and s);
end Behavioral;
答案 0 :(得分:1)
两件事。首先,您在SELECT a.[Current ClaimID]
,a.[Claim Adjustment Type Code]
,a.[Claim Effective Date]
FROM #tmp_hic_dupes_list_final_not10 a
INNER JOIN (SELECT [ClaimAdjustment Type Code], MAX([Claim Effective Date]) AS MostRecentEffectiveDate
FROM #tmp_hic_dupes_list_final_not10
GROUP BY [ClaimAdjustment Type Code]) AS XYZ
ON a.[Claim Effective Date] = XYZ.MostRecentEffectiveDate
ORDER BY a.[Current ClaimID], a.[ClaimAdjustment Type Code]
之前错过了分号:
end component;
第二件事,在实例化中分配端口时使用冒号:
component mux_2bit_2_to_1
port (
x, y : in STD_LOGIC_VECTOR;
s : in STD_LOGIC;
m : out STD_LOGIC_VECTOR
); -- <--- semicolon here
end component;
最后,在第二个实例化中,您在最后一个端口(mux1 : mux_2bit_2_to_1 port map (
x => u,
y => v,
s => s(1),
m => a
);
)上使用分号。首先,端口实例化没有分号,第二个,在结束括号之前没有冒号。