4. 4 : 再一次“组织”起来:2 a0 u0 `. R# y. b/ y6 t2 F
这一章,我们要讲 effect_module 和 flashing_module 组织起来,然后命名为“done” 代码如下: , H8 h6 k# v+ ], `- I; c3 _
1.module done 2.( 3. CLK, RSTn, 4. Start_Sig, Done_Sig, 5. Q, 6. Right_Done, Left_Done, //用于观察 7. Right_Start, Left_Start //用于观察 8.); 9.: Z$ d$ ^9 }5 L' i( J$ @* n1 N
10. input CLK; 11. input RSTn; 12. input Start_Sig; 13. output Done_Sig; 14. output Left_Done; 15. output Right_Done; 16. output Right_Start; 17. output Left_Start; 18. output [7:0]Q; 19.8 u( l6 X, y3 x
20.
7 H) F x) ? z/ Q& {/*******************************/ 21.
% u+ g) D, `% K. A 22. wire Right_Start_Sig; 23. wire Left_Start_Sig; 24. wire Right_Done_Sig; 25. wire Left_Done_Sig; 26.
% E" A3 j4 L, y0 ?8 m& R8 M! ~2 } 27. effect_module U3 28. ( 29. .CLK( CLK ), 30. .RSTn( RSTn ), 31. .Start_Sig( Start_Sig ),) D% B) f8 J2 B! B8 ^# w5 [% H0 `- U
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// in from top 32. .Done_Sig( Done_Sig ),
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// out to top 33. .Right_Start_Sig( Right_Start_Sig ),
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6 w z3 k m" c' z // out to U2 34. .Left_Start_Sig( Left_Start_Sig ),
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// out to U2 35. .Right_Done_Sig( Right_Done_Sig ), 9 s* N( ^: ]8 v. l1 u c
// in from U2 36. .Left_Done_Sig( Left_Done_Sig ) - a h+ j( G7 `8 W# J+ Y4 E2 i
// in from U2 37. ); 38.
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/ ]! `" v3 Z# p# z: `6 |/*************************************/ 40.
/ t" y. L$ z o( O% Z( | 41. flashing_module U4 42. ( 43. .CLK( CLK ), 44. .RSTn( RSTn ), 45. .Right_Start_Sig( Right_Start_Sig ), // in from U1 46. .Left_Start_Sig( Left_Start_Sig ),
+ Q/ |- }, ~6 O7 o' z- u// in from U1 47. .Right_Done_Sig( Right_Done_Sig ), 1 }9 [0 S5 q* A# |( _3 r& ~' q
// out to U1 48. .Left_Done_Sig( Left_Done_Sig ), ; `# L% x5 n q \
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// out to U1 49. .Q( Q ) // out to top 50. ); 51.: B2 e0 C, {9 g6 G: b5 K; b4 w
52. /*************************************/ 53.
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6 `, q! C- W+ R5 e; z& u//用于观察 55. assign Left_Done = Left_Done_Sig; 56. assign Right_Done = Right_Done_Sig; 57. assign Right_Start = Right_Start_Sig; 58. assign Left_Start = Left_Start_Sig; 59.
" w1 I3 P+ b; |. u- w8 S 60.endmodule
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这是第二层的组织了,到这里基本上我们已经完成如下图的效果
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1. `timescale 1 ns/ 1 ns 2. module done_vlg_tst(); 3. reg CLK; 4. reg RSTn; 5. reg Start_Sig; 6.3 f( M3 O- h" E
7. wire Done_Sig; 8. wire [7:0] Q; 9. wire Left_Done; 10.wire Right_Done; 11.wire Right_Start; 12.wire Left_Start; 13.done i1 14.( 15.
: S" f+ n) ~) Y+ P* _.CLK(CLK), 16.9 g% U% W9 H5 m# I
.Done_Sig(Done_Sig), 17.* p9 F9 f7 C& M) b4 z* K" p
.Q(Q), 18.
3 ?/ H3 U. }* j.RSTn(RSTn), 19.8 p9 e6 C( Y% D9 K8 |1 x
.Start_Sig(Start_Sig), 20.& M {2 |# t( B2 H1 d! }" r
.Left_Done( Left_Done ), 21.0 v- X2 {& A1 b# H( l1 j
.Right_Done( Right_Done ), 22.
% K( C/ \$ Y- H3 i y.Right_Start( Right_Start ), 23.
; s2 k0 s( V8 k7 U a. V.Left_Start( Left_Start ) 24.); 25. 26.initial 27.begin RSTn = 0; #20; RSTn = 1; end 28. 29.initial 30.begin CLK = 1; forever #20 CLK = ~CLK; end 31. 32.initial 33.begin Start_Sig = 1; end 34.% ^; H) R5 K5 z* f- r2 o# p
35.endmodule ! ^8 [% b9 F6 g9 C. Y# Z7 S
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下面是仿真的载图:
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http://j.imagehost.org/0352/PIC10_7.jpg |