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不好意思
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想請問這晶片中的程式碼內容
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, o. p: Y1 d" ]/ |7 F; J說明他有什麼功用
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謝謝
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module keytr (
6 q& L7 w6 V4 v+ l) R/ K% @* G$ e) Mkey,
/ | Z3 K- L7 S8 p/ Q& I. l0 XON,
4 }) f3 c" X" C# J0 k8 ?* p8 g* Uclock,6 ]; W$ }+ O" n& R8 W2 z' C- B: t
KEYON,
9 n$ M1 m' T# H& D0 ]. Bcounter
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inputkey;
. e6 w. Y2 k0 routputON;6 x9 i0 u6 U' {1 T% j# F
output KEYON;* c" N: C" t& l8 ~0 a1 M$ a5 X" h
inputclock;
' [" B5 ?/ i' v) q+ T! Koutput [9:0]counter;9 H# S' s `/ ?0 J
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3 L ?& j+ {' o) q8 Q8 X- Creg [9:0]counter;( x) C/ h$ h+ c6 e- O2 r
; ~6 a) @! ~8 creg KEYON;: @" q u d; [
wire ON=((counter[`OUT_BIT]==1) && (key==0))?0:1;
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6 S5 o( ]6 W' F0 `7 b, `always @(negedge ON or posedge clock) begin
% r: J$ J2 S( B E4 _' Oif (!ON)
' f2 W7 J+ _1 I) \) @% _counter=0; 4 I3 _# k/ t; v9 x0 A# y- Q2 J- G# g
elseif (counter[`OUT_BIT]==0)
) W% c* n: S8 |6 P w1 N; Qcounter=counter+1;1 V" r$ j+ A4 t g+ a% {6 \
end
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3 x. V G# \! ~7 H0 Y8 f4 galways @(posedge clock) begin
; b' j' s8 ]! L: g J" eif ((counter>=1) && (counter <5))
@% u5 ]. \- g6 O5 cKEYON=0;7 k2 }/ ]+ |, Q3 X* h
else5 f$ w' b% t5 @9 I: g+ ~. i; g
KEYON=1;
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endmodule |
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