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发表于 2022-7-20 12:04:45
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module jsq(CP,RDN,tmp,D);
$ L, f6 L" @2 W( n$ Z! ~& D5 Dinput CP;) A" y( ^" {+ f( ~
input RDN;. d7 N4 l) z) w1 ]4 Z' h6 H3 @9 h
output[6:0] tmp;2 K. H' t2 U/ V, f3 W/ Y
output[3:0] D;* c$ U" J; ~ o( g+ I
reg[3:0] D;
( }8 R/ m6 r1 _+ t7 a) a9 s$ Oreg[4:0] T1,T2,T3,T4;
# ^7 `) x* K3 I! I7 ?# R/ N( treg[6:0] Y;; J! G1 |9 }; G: t
reg[31:0] CNT,CNT1;* G l3 z, y7 a0 o
reg CP1,CP3;
5 I( c1 [# m4 V9 U7 }( m) i* treg [6:0] tmp;
1 ?8 i, L. }2 F5 Hreg[3:0] c;0 F! E+ f% z% S9 m* o+ [% {
reg[15:0] A;
9 C8 m2 {0 y, W+ ralways @(posedge CP)
0 N7 D. N9 q6 o, S' R begin
- Y% j+ u1 B5 m. n if(CNT<24999999) CNT=CNT+1; 7 i. ]3 Z$ S: u$ p/ [/ Q$ u! w
else begin CNT=0;CP1=~CP1;end 9 K' }6 h a+ |/ D
if(CNT1<2499) CNT1=CNT1+1;
8 d9 N% ?& D& J1 K q; B else begin CNT1=0;CP3=~CP3;end 9 D/ H4 J+ W- R$ ^
5 {0 ]3 Z/ }0 f8 b. n+ P end
0 Q" X+ T- s' p! T, d/ a$ _8 r+ ? m
always@(posedge CP1)
" o: C7 P% U3 i6 t. r4 { begin( B6 s1 H" B8 d3 @6 b/ c9 y
if(~RDN) A=9999; ; y5 q* v# ~: p% W3 U
else A=A-1;
% c+ G: w* }" e9 r- B' y+ w T1=A/1000;7 h( u8 o d8 y( Z$ t% {; W; U, C
T2=(A/100)%10;
+ L# T- ^* A0 l0 Q; }9 N T3=(A/10)%10;8 e- B& G; y4 ~: h! `8 s: t
T4=A%10;
# C9 E9 G% z5 b) B6 q6 m" w2 L end 1 V9 U' ]3 \9 p
always@(posedge CP3) 9 J+ b' t6 F7 g% a ~: U3 a
begin
+ X, o- ~: Y3 h* v( ~begin
# \% I. p7 K) L( L5 G) u* m if(~RDN) c=0;! o) g" S! f" r( Z: j" i2 b
else if(c<3) c=c+1;
+ ^+ r6 h! g9 ~7 y8 h' G; L- g else c=0;, `& {6 I+ V' H( C- W
case(c), g# u/ v1 t2 F& o. l c
0:D='b1110;. `& b+ e' y; o `- m$ h* v
1:D='b1101;$ Q$ e7 V. o, X# K* b; f) s; S
2:D='b1011;3 y% q9 W6 j' t, `4 S( K5 C
3:D='b0111;
/ {3 [& n2 x6 l endcase! ~; h. i4 N, I8 T6 e
end; K- N, C- i2 e) r/ X/ X( F
begin6 \5 D% c& w: }* {& H; {0 U
case(D)
2 p) v+ t0 |) ^$ E: O# a2 \+ u 'b0111:tmp=T1;
4 n- j" T* w2 \* z 'b1011:tmp=T2;1 k/ K! f( b# L0 n
'b1101:tmp=T3;
6 x. K+ @3 R' }, ]. Q( i) a 'b1110:tmp=T4;
. [% a3 P6 B. m# L( O endcase! q5 A) c" B( c. N* @
end
/ a7 [1 l0 h$ \ begin
) w: L. p0 L) o* k, i case(tmp)( ^6 t7 x1 K2 c$ }4 ^$ v
0:Y<=7'b000_0001;0 I F+ S# g, }" g
1:Y<=7'b100_1111;; d( }; c+ n# S3 {
2:Y<=7'b001_0010;
& e+ ]5 z' C1 l& H9 c/ Q 3:Y<=7'b000_0110;
$ j' V. z0 f4 {& q+ y$ P, H 4:Y<=7'b100_1100;
4 N/ A1 Q0 k9 T* E U/ [ 5:Y<=7'b010_0100;5 e$ \9 K" p3 K x( K( e' U% s
6:Y<=7'b110_0000;$ \+ `+ _4 R9 f, K7 C
7:Y<=7'b000_1111;4 H1 @, J: k G9 Y& W7 U
8:Y<=7'b000_0000;" a0 {7 z! B4 e7 R
9:Y<=7'b000_1100;" { C& M% e9 f9 \7 D: N9 }# u
default:Y<=7'b000_0000;
9 t8 Z2 {+ N3 Y endcase6 E6 a! n% f) F" Y, e. u
end7 w$ }3 u7 G* j, d. B7 E
end) u s9 [7 T) {8 C+ r- M, S
0 z- u( E9 K4 z) Q5 v
endmodule |
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