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發表於 2008-5-14 22:45:18
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感謝囉!!後來我改成這樣8 g9 C. Y" w8 Y7 x7 u
entity sedg7 is& H8 @% n* P9 x' S
Port ( Enable : in STD_LOGIC;
: R! X) G9 x) ^ X : in STD_LOGIC_VECTOR (3 downto 0);. {) {+ _% ]9 X" O4 x
a,b,c,d,e,f,g,p : out STD_LOGIC;9 ]% z$ x8 z9 K% p7 u
SEL : OUT STD_LOGIC_VECTOR (5 DOWNTO 0));
+ h. e: r+ {# [9 ?* g4 |; f 7 G7 w8 o" l6 w
: @0 P5 r: a0 {7 W" z' y( |1 q6 Z5 g6 G& M! A& h/ W: Q# S
end sedg7;
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architecture Behavioral of sedg7 is9 ^5 z! W! E8 ?* Z
SIGNAL Y : STD_LOGIC_VECTOR (7 downto 0);
8 x7 V" X% }; q3 a, m8 T- obegin# P, F- o* q# P! t G8 ^& q3 F, S
Y<= "11111111" WHEN Enable= '1' ELSE% b1 f" J2 M; m9 L
"00000011" WHEN X="0000" ELSE' c/ U: p+ \5 m; t7 [2 k
"10011111" WHEN X="0001" ELSE2 s7 b5 M8 ^) a) ^6 k# t' a
"00100101" WHEN X="0010" ELSE
3 w& W0 }& D3 j w+ e( c "00001101" WHEN X="0011" ELSE+ B, O4 w# e0 o5 V" `% L
"10011001" WHEN X="0100" ELSE2 R9 Z f/ l% d0 R
"01001001" WHEN X="0101" ELSE/ ~0 Z, H6 [: R6 C" A& k! X
"01000001" WHEN X="0110" ELSE, B1 g: Y; v. Z6 k1 {
"00011011" WHEN X="0111" ELSE
# n9 r% m0 o# {8 g+ {* w "00000001" WHEN X="1000" ELSE
" d* p0 H5 a1 h2 R* H5 I "00001001" WHEN X="1001" ELSE1 Z: N; [" m6 {" C
"00010001" WHEN X="1010" ELSE8 Q2 L% G6 p5 u$ n3 ^
"11000001" WHEN X="1011" ELSE
& A3 c* V$ Z6 @: |8 A1 T4 R; e "01100011" WHEN X="1100" ELSE
$ `/ d, ]! j% y6 S4 z6 x "10000101" WHEN X="1101" ELSE! J3 C. a" A6 O J/ U
"01100001" WHEN X="1110" ELSE. Z' H8 {: F$ Q; E/ i
"01110001" ;
" c5 k2 e) [/ n& A/ N a<= Y(7);. M! O* N5 h# n0 r- b5 R+ P3 r
b<= Y(6);
0 ]$ T S# X6 j a$ H4 } c<= Y(5);4 s% s: s$ y, e0 Q$ a, ?2 O
d<= Y(4);, e4 S/ i, \. t, W3 v+ Y: X0 W
e<= Y(3);* g( W% \( k7 B" j9 w
f<= Y(2);
$ J8 D3 N2 |/ M9 G) w! Q3 R g<= Y(1);
3 q: Y6 D v4 o% m5 J p<= Y(0);
- _6 w( ^" \; m+ @ SEL<= "111110" ;
O- F+ E, U+ k; ~1 y2 qend Behavioral; |
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