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發表於 2008-5-2 12:44:58
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比如說我的code如下:
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module firo( run, Dout);
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input run;
5 L' ]/ f }! _$ X6 Y/ [0 |5 c) Poutput Dout;" b* F* j! A a# z( Z+ D
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wire run, Dout, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12;$ @/ E) G9 |1 h
wire w13, w14, w15, w16, w17, w18, w19, w20, w21;
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% F" u* z9 j! ^3 ^. l5 ^nand na1(w2, run, Dout);
. ^& W6 J4 j- yxor x1(w3, w2, Dout);
) l( @$ }2 D& g4 H1 V; rnot n1(w4, w3);9 C' p( B: |1 I6 }! u8 v5 Z
not n2(w5, w4);
- B% A, f& a9 Y; C# F( Bnot n3(w6, w5);; f3 V+ ], X& C% p- i% _7 c
not n4(w7, w6);" M: G3 X: C; k- s& d1 A
not n5(w8, w7);
4 J/ @9 A/ F7 tnot n6(w9, w8);
/ D- i2 c& J4 B% q7 Knot n7(w10, w9);
6 @9 _/ r) i4 v8 W' _, Kxor x2(w11, w10, Dout);
" H' Y: w4 z: A4 r1 Q( Inot n8(w12, w11);% g0 M, Z0 A5 o" F( C& s
xor x3(w13, w12, Dout);+ ^& A/ ^1 A% }; a# A8 Q
not n9(w14, w13);
$ I8 Q* v v/ f: d, Yxor x4(w15, w14, Dout);
7 g6 u4 k9 n, \/ f4 ~not n10(w16, w15);
9 Z: O) J" b( x# A* }( txor x5(w17, w16, Dout);
F; c: ]& ]: {; q# f* Anot n11(w18, w17);- W8 _8 q4 r0 K8 u% h
not n12(w19, w18);' L5 l5 l A) }$ e
xor x6(w20, w19, Dout);2 a/ \+ e; W3 |( f
not n13(w21, w20);
: [7 X* [" R& X' l. x+ wnot n14(Dout, w21);
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. u9 e* s1 p" Q$ Z9 `4 Nendmodule
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那我要怎麼加所謂的attribute 才能夠keep我的電路呢?# I6 |: o# }- r2 v# v. p
不好意思,因為對此不甚熟析,希望大大能夠做個範例指導,這樣對初學者的我能夠較快上手8 i& r3 ~7 h. s2 V
5 \7 h8 A/ ?' e感激 |
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