' g# @9 W2 [/ V* f9 o% d: H& M*-------------------------------------alphabet-------------------------------------* , k4 K3 c/ k4 b0 B; R% f: f! j0 x) p2 }; W2 X n0 `
`timescale 1ns / 1ps 8 e; S9 x9 a& L3 _+ t ? P* m# D. d% k2 ]% C
module alphabet( 8 w' V: A8 J: m% u input RESET, 9 [/ D I) ?, S$ x9 o$ i3 a input Clk,4 [) ]0 ]+ C1 n. E I' i5 W
input LONG, ' E: O+ B* X1 } input SHORT, / a( V7 y" M. C+ d3 y2 w input END_CHAR, $ J1 z' _3 g% t" O: F output [7:0] LETTER, 6 Y0 g9 Z3 e8 s$ T, D output STROBE) \ p- i) i' c7 B1 G
);7 H x5 _$ ?3 q; X2 I: u: Z
, x# g: S/ C8 u. K& Ureg[4:0] STATE, LETTER_REG; ; H V& K/ F' e5 t* o0 rreg STROBE_REG; # M5 y3 M3 ]/ \+ `# K, s% V | `; Z; [. x8 ^
assign LETTER = LETTER_REG; * T+ B; h# G6 Y; |assign STROBE = STROBE_REG;5 C! Z$ E; x1 i, r, M3 s
' G1 O+ o: ?. ~! S# G1 I8 @; o* {- U7 |4 U9 Z$ Q$ M, o/ \2 H c# g
8 L' S' Q% t U4 _localparam5 Q. A& N, r/ s9 K
INIT = 'h0,* R3 j z$ O* L" b
A = 'h1, 6 y' E+ e. t g* |6 N' N B = 'h2," W: m; s' k* K7 k2 a
C = 'h3, . v5 G5 O+ a( e- p: J D = 'h4, 8 s, D8 e# t. i# C3 H- W E = 'h5, 7 z" ]) I( t' B" o+ ]/ J F = 'h6, + ]0 ~4 P. u% ^ G = 'h7,7 j! | d6 U& L6 L
H = 'h8, - c( S6 L. i6 b2 @ I = 'h9,9 {4 F8 W/ P# b) X1 O
J = 'hA,1 q! U" w# i3 D% W1 O
K = 'hB,1 R' D/ ]* ?- B! ^& O' f' Z/ t" w
L = 'hC, * a' S6 W' D0 }5 T. H# l M = 'hD, . N/ N% F0 ` R. j g N = 'hE,! y( B. b0 V& T8 Y$ h
O = 'hF, ) `- f) U9 p7 J, a P = 'h10, : a: v' y3 F% ?! }. u; E9 |! r Q = 'h11,) w) c5 y" A4 L% [! R
R = 'h12,* Q t0 c7 |* t" {% u
S = 'h13, , z' `3 N" w/ A( Y: O H3 ] T = 'h14,( Y* Z' O5 P3 u- H" f
U = 'h15, 8 d, [( D% W; n V = 'h16, 5 B$ g: s. @ | W = 'h17,* U, U0 F+ P8 O/ {
X = 'h18, . J1 a& w. e: u O) F3 U7 j Y = 'h19,* z8 `0 e! l5 j* g9 R! g4 X$ F
Z = 'h1A,* T3 t+ b7 }' u, Z E
DONE = 'h1B;9 K% v' r- W0 l. A+ |- r1 m) P
. B2 t" N0 K: R
, l9 ^ ^+ h# K& u* falways @ (posedge Clk) / ]9 o5 D& I( F4 W5 s; B5 E- V# Fbegin1 @0 G% t: S6 l
if(RESET) # r G, J, ^* [6 I" p2 G/ D begin 0 G# K6 v! H1 M D STATE <= INIT;7 q( `& b! [- V9 }' m+ K
STROBE_REG <= 1'b0;# t% t$ W1 G7 o1 [* R* F' ]
LETTER_REG <= 5'b00000;9 Y: t( p2 l8 T# \1 ?- D- V
end ; m+ H2 @/ B1 ]* c else" \2 H* t0 [& I; H
begin 5 J/ a1 g2 c% B( M8 V* H H* p case(STATE) X C+ o( J; O) ]6 o9 o
INIT:$ ^( g- }$ Y1 Y& c H/ G
begin) Z1 f) @% @& R7 K7 x
STROBE_REG <= 0; 0 G$ s7 K7 a( k/ f* o if(SHORT) STATE<=E;5 g: P! D% u. Q& |
if (LONG) STATE <=T; - T, x+ ]4 O+ N7 A& b end ( V0 i3 J: A) G7 r$ V) Q A:; G3 O9 v+ u2 k: ^1 \5 _ c
begin # K7 } G& D8 ?, S if(SHORT) STATE<=R; 8 `% O) f) o/ a, U7 R/ t. _4 U4 x6 N if (LONG) STATE <=W;$ L* F/ O2 A, o' t" g9 Z7 G
if(END_CHAR) STATE<=DONE;! o5 x% X% s' u
LETTER_REG <= STATE;1 j( \: Q9 a0 e, |2 a
end : y- U! R$ i7 U B:$ z) t- }/ L; S; n6 g0 W
begin % I* ~) I6 q6 T. A if(END_CHAR) STATE<=DONE;. R$ V- r5 {8 Q! N
LETTER_REG <= STATE; ) s% ~' j0 c* f8 Z6 J) ^ end + I+ ]) b. u/ F# _6 k9 K4 `1 H( X) _ C:& A( j9 M. M, [/ Z7 N( g
begin- ^4 h6 P* J7 k. j8 ] C/ {
if(END_CHAR) STATE<=DONE;# u. m& |! ~" E2 T' ]: S
LETTER_REG <= STATE;. \' H- |6 z4 u& I7 T/ O# `
end + A8 r- E7 U$ e2 J D: * ~* c/ _! i( \0 s( ~ begin& C' ? ?* z( Y7 b* q3 v: j( p. ^
if(SHORT) STATE<=B; 4 y. }9 V2 y! }! u d" z) z if (LONG) STATE <=X;" T2 C" L# P. ?4 W( E
if(END_CHAR) STATE<=DONE; . J5 C% u# {% {! S: ~ LETTER_REG <= STATE;5 m: T2 |# c% j" R- O8 L
end * t3 H% }. B. M, ] E: 9 T# A/ `4 |* P begin 3 C) b. e% h2 Z7 Z* w. B8 P if(SHORT) STATE<=I; ) U/ U4 [' Z4 [) g/ V* d, s if (LONG) STATE <=A;+ v8 X4 ^1 k+ ~" {$ X3 N7 V7 Y
if(END_CHAR) STATE<=DONE;4 z( h0 K9 L: L
LETTER_REG <= STATE; 1 i6 F* T% B' R& h end+ ?7 i+ g: E2 o5 M
F:" ]. U5 w2 n5 U1 E
begin4 N; V/ f, J J
if(END_CHAR) STATE<=DONE;6 n% I. Z& y) T+ A9 z
LETTER_REG <= STATE;/ x& ^6 R# ~" `* c" {) ^
end : }/ w- I+ c' w5 T2 Q G: 9 c9 `4 y) S- Y- N9 {' q begin; E5 u/ w1 g) o8 P" O" P' _: D. b
if(SHORT) STATE<=Z; ! B* f/ W) I$ G1 R- V6 c, S! T/ A t. L if (LONG) STATE <=Q;; w e1 q0 L7 i7 r
if(END_CHAR) STATE<=DONE; 4 L# X* b$ ~: O0 S) w# e c LETTER_REG <= STATE; 3 L. c8 V- |, l& p- @) X" N$ j% ^! q end$ l2 x5 j1 A: z J
H:4 p% }8 \6 g- E. j/ z; x; I$ `# q' K. W' I
begin " B; k; n- f1 f, d- @ if(END_CHAR) STATE<=DONE; 1 q2 I) h6 `& P/ M9 F LETTER_REG <= STATE; + R- n* n+ W0 p: D8 r# }6 @ end' v( P, U2 G8 I! ?5 i5 d
I: 0 t" b/ N6 C9 e( y% _ begin , S \. w) V& U& x if(SHORT) STATE<=S;8 N* p6 t5 q# ^4 ?! K
if (LONG) STATE <=U;% e" l! O, S7 l2 r. V5 M
if(END_CHAR) STATE<=DONE;( @# l; r1 o9 K7 j
LETTER_REG <= STATE;& ]6 Z; P. _7 s: J0 `! T: d8 J3 H: T
end y5 V# B' F! r& L8 M J: 9 t8 l& J) A' a begin . F6 [8 a) o; `% O( s D; J" _# t if(END_CHAR) STATE<=DONE; - J7 w# e9 \: c9 J3 { LETTER_REG <= STATE; 2 l4 I+ S- E' F; e end- U) ^4 m1 A( R% m% g% w2 K4 X
K: % c0 V9 s+ F! _) D; m begin7 K1 H3 ~. X. M# R
if(SHORT) STATE<=C; 3 n8 h; C. W8 c* E5 a; u if (LONG) STATE <=Y; * v$ P( n6 q Y% p, Y if(END_CHAR) STATE<=DONE;% I! J: _6 F+ G
LETTER_REG <= STATE; 4 P% ~. r1 W& t" x9 H6 ?# k& e% m$ o end. `! m3 e8 u6 M$ Q6 H+ A
L: 4 r7 e' h+ F1 H' d9 q7 u! x begin8 z$ Q+ X/ @& u+ S$ N7 i4 T e
if(END_CHAR) STATE<=DONE; ( S- L# ~ n3 ^. o LETTER_REG <= STATE;" A4 t. R1 H/ f( H0 U$ L7 s
end, U0 C+ X8 O* j9 I5 }
M:/ x4 N6 }3 E* O4 j5 {0 l Z/ J
begin- U) d+ \) H4 d7 z; j
if(SHORT) STATE<=G; + R' l$ g, m5 y* ~+ ]' z- L, h S if (LONG) STATE <=O; 4 h6 d0 X* A- C# a, y* P9 B1 s if(END_CHAR) STATE<=DONE;& G3 w& Z7 a; }' Y. ?
LETTER_REG <= STATE; ; L; ]& c/ M4 ^/ h9 I& J5 d1 s8 B }6 U end : U7 { w$ t8 ~ G! b N: ' \+ b+ j. H. j. R+ G2 O9 s begin7 z* c' e9 ?8 s# q# T3 r
if(SHORT) STATE<=D; 3 K, U1 {0 a. w Z0 y: x; J: [4 M if (LONG) STATE <=K;/ z6 `' G' d- A3 I" n
if(END_CHAR) STATE<=DONE; + O! H5 X% ]1 j+ F6 L; R/ {! Y7 j LETTER_REG <= STATE;/ N, Y3 C' Y9 |! D% J- g7 A
end ' F7 r7 `, X6 G3 v @3 O0 k O: $ E& }* s! m! J( K+ e2 j1 c begin ; |& ]' H( D) j' p if(END_CHAR) STATE<=DONE;! j$ O# u' J6 `2 F3 T
LETTER_REG <= STATE; 1 V" r# A* T4 Y/ O# @$ f end, ?% e& K! X k+ X$ {* T- p, L j, V
P:1 O# k1 Z9 f' n4 J
begin7 b9 d% P% U4 z7 |( R
if(END_CHAR) STATE<=DONE; " b& l$ L/ F" G% F) m9 A) b LETTER_REG <= STATE;5 y( p; I5 R- ]) V8 ]2 |9 ]9 {* O
end ; w& g+ p4 f. o! B8 O) ^ Q:* A0 q& ]% ?$ f
begin ) c& s: l9 h( ~6 \ if(END_CHAR) STATE<=DONE; ; Z# F* N3 y9 J LETTER_REG <= STATE;: K7 ?3 }1 H& ^; J/ T! s
end; ]- ^. w+ v6 J" w2 ?% n, W
R: 5 L( } w4 M& U2 y8 Y3 h5 z begin6 p% ], Q0 \# e, D7 A. {3 c
if(SHORT) STATE<=L; 3 T* I' N, ^/ G/ o; @# V t if(END_CHAR) STATE<=DONE; $ Y V; R- A8 n% e- X# z LETTER_REG <= STATE; * E4 }: U0 z' j' i5 R' v% r end 4 Y2 E# H* F" e" l7 L S: h+ Y5 W9 g( H1 T begin8 `1 i/ g9 |* f' d1 j
if(SHORT) STATE<=H; 3 {& z/ U0 L; P* L if (LONG) STATE <=V;% A6 z& B1 |& _! f: m8 p0 m( Z
if(END_CHAR) STATE<=DONE; 1 l4 Y2 _) ^. r3 N8 r8 V t+ P LETTER_REG <= STATE; * \7 Q! t! P2 P ^9 E end % Q& O% [0 b6 \( @ T:, J5 e5 S7 ]3 y2 P/ n
begin3 c2 o; s8 I* E/ A8 x, G* v
if(SHORT) STATE<=N; S% ]! V) t7 U% Z$ w
if (LONG) STATE <=M;1 L! v" @+ @/ P2 x6 k
if(END_CHAR) STATE<=DONE; 1 j+ l0 t4 _2 e) `$ D! h- ] LETTER_REG <= STATE; . _( N# U" z( U* q0 D: \ end- r# h+ G9 T9 a2 _6 V8 p* u; l3 D
U:- y: G* Z; n {6 D9 F" q
begin / P$ m' H; N. u1 D9 \: K0 h; F if(SHORT) STATE<=F;& |- ?$ a7 d! G$ Z, l7 d( A: E
if(END_CHAR) STATE<=DONE; 4 ]1 C1 {0 y' _ LETTER_REG <= STATE;2 c. I8 _& F o9 c5 |; A7 h' i
end$ v$ n& l8 F$ [; Z
V: 5 u& G& e5 z* H+ J9 e6 V begin* c) G% m& T2 a" p% w+ c
if(END_CHAR) STATE<=DONE; 2 G) Y0 F3 u, X LETTER_REG <= STATE; + O* g9 h: F. v/ U( o! a8 z" U end * \) N' R, t+ l8 O* s( r W:) l1 V+ _, E" t3 e# Q/ K
begin C" S# Y: ?9 V( \& N4 P if(SHORT) STATE<=P;7 X6 m9 x4 @5 p3 o) E
if (LONG) STATE <=J; 7 t- _% ]5 P% J& O" a+ Y if(END_CHAR) STATE<=DONE;+ G! s2 ~: r" M6 Y. Z5 b3 y% k7 M
LETTER_REG <= STATE; ! z9 p8 L" u5 ` end . w. ?2 v+ U2 M5 u; G6 K) | X: # l. C5 D' M; z9 \1 e begin 3 m0 p0 h: m( i7 k4 g/ C' r if(END_CHAR) STATE<=DONE; $ ~) m/ M K( | LETTER_REG <= STATE;9 J4 ]# o$ E; J( ?+ G! j' h
end$ ]* s: I* w3 H4 t' a' i) Z, i
Y: ' V+ P( j \4 [) H/ H I6 G begin0 P6 r- B( k8 J3 Z0 G" o' x8 N
if(END_CHAR) STATE<=DONE; : G8 z; E9 A% e9 I LETTER_REG <= STATE; $ H; S6 M/ Z+ [ end, ~% t. b5 D" E' M% N0 T
Z:1 |. X. E, S: V
begin 5 ?3 |0 _' o2 R if(END_CHAR) STATE<=DONE; 5 J) j$ r" x8 q, h! L# F LETTER_REG <= STATE; ! i6 j( Z$ ~5 \: F; Z# R end " g5 w8 T. @' j6 K: R9 S+ H' l' o DONE: STROBE_REG <= 1'b1;1 ?0 z6 Y% T, i4 @4 k9 E
default: STATE <= 5'bXXXXX;- c& e5 s4 r }3 N! v% y
endcase* t$ {5 Q- W4 M2 N p# u
end3 E6 \& P2 n4 z+ M3 }5 w# H0 F
end6 \2 c$ `" V0 n$ x, u }/ H
7 ]/ U! W7 W+ a$ |5 A) z0 I. E7 b
endmodule ' ?) u( g; @8 {, G作者: pk3089684 時間: 2021-5-26 05:25 PM
7 j' j( T% A. X; }: J*-------------------------------------TextLCD-------------------------------------* ( P1 B3 C1 v: T' |( v6 @ ) E3 F: i5 A1 G/ t+ Z9 u) P9 Jmodule TextLCD(LETTER, ClkPort, rst_n, lcd_en, lcd_db, lcd_rs, lcd_rw, lcd_rst);& r) a8 y' H5 @! y/ B" \* m
, Z2 N! n- K+ j& L! ^$ y, |
input ClkPort; // System clock + R T F! r) a2 Q6 X8 q1 @input rst_n; // Asyn. reset, high active # X9 G7 l! k W& ~+ winput LETTER; 9 T. ^0 u% g& g: _) Q: R* i6 Zoutput lcd_en; // LED enable % A# Z" l" H. Coutput lcd_rs; // register select . R% F, S8 l/ z" G F3 x$ | // 0 : write command register # N7 n6 {; d3 o* l# T" k9 f: \ // 1 : write data register( ^0 c( y5 i/ T0 \( N+ G; O
output lcd_rw; // Read/Write Signal% c7 w6 t( W: y7 O, k8 v" O
// 0 : write3 F. u6 k/ e. j/ w$ E# E- R* { E, l
// 1 : No function2 m0 }) _$ t& X m( p5 f- F- v
output [7:0] lcd_db; 1 e3 n- ?& k" _, l+ e/ doutput lcd_rst; ! B( |1 s0 X R& F% T# i+ I+ H / S1 N6 X. h& G {8 L// ------------4 n W( `' w: r; X2 v4 L/ T% ?& w
// Local Signal + J' Y- W; H9 |# l. t4 Q) g// ------------ " ~* y* V t# I/ u! l4 p2 V reg [7:0] min_out;/ l9 k. S+ Q' A; `6 D2 Z
reg [5:0] sec_out;+ k. H+ g4 A% @% X
) u0 m- H9 m) \$ e0 e* U- O' U/ _
% H9 I7 C! {! d, e! ~" o
// --------------------- % k& `' _6 B N' ]$ H. k* M// Main Circuit -- Clock3 _# ]& Y% @/ r, c! w+ e
// --------------------- $ \8 H; Y) c; P4 l3 u7 o // System Clock = 30 MHZ & h5 [( D" o1 k. a4 K // msb = 19, 1/60 sec / K, @) H- z3 F" m$ c // testing : msb = 15 ~ 19 ( d9 S: [( d; l! ` // design : 60 sec = 1 min, 60 min = 1 hr.9 f, v, b+ ?3 N. z; ]/ [) s
//parameter msb = 19 ;" [& N- G. @6 B( k1 [
parameter msb = 19; & x& Z' s) Y3 V: F, k reg [msb-1:0] cnt_1;" z. P2 K4 l( u) u# `1 E
always @(posedge ClkPort or negedge rst_n) k/ O" G( u% {' |8 J x* R: u if (~rst_n) cnt_1 <= 0; ! {, F. Y8 u3 H- F- K9 g: x; m) ^ else cnt_1 <= cnt_1 + 1;6 B' T( n- s% R8 c. ^/ Y; N; R
5 h4 g4 O% {. @' i4 O h' |6 F( v # W; X- B6 X. ^( _ // --------------------------------- ! O6 h5 X: }( G // Count second (using binary format) # M2 e. y; |* b# N7 T // --------------------------------- # t+ F& a l& w1 ~. } always @(posedge ClkPort or negedge rst_n) ! L; ?# v* M# q# G if (~rst_n) sec_out <= 0;' _. A! N. s4 {+ p
else if (&cnt_1) begin0 B9 J+ i; W& y- z5 k/ w
if (sec_out == 'd59) sec_out <= 0; 6 @/ }0 b' ^0 F4 V else sec_out <= sec_out + 1; & Z& X! Z1 _8 H: \ end 1 R$ q4 |) d2 v9 Y$ }2 c 6 j# W1 e; k9 o1 [# r4 c6 O4 ] // ------------------------------- d3 b6 u6 \3 ~6 H# q
// Count Minute # Y( a: K$ R9 q" N // ------------------------------ 0 e1 @( q: _9 F2 u always @(posedge ClkPort or negedge rst_n) / | E5 a! `2 W' g if (~rst_n) begin . X3 q* `0 D( t min_out <= 0; ) R+ U \ I! Z# D4 D* V: j end " l- _8 C, m( K9 t6 }6 h1 X" @ else if (&cnt_1) begin1 M: a* M3 Y& q* i1 Z0 z7 u( l
if (sec_out == 'd59) begin* q" w/ n z& d, H+ O# P
if (min_out[3:0] == 'h59) 6 n: E; S0 ?1 I5 Z5 r5 o
min_out[3:0] <= 0;0 e+ z U8 s' n: }
else 7 V A+ D$ b3 X X Z8 y min_out[3:0] <= min_out[3:0] + 1; # A5 n5 |3 T, i6 v end 8 }; F& T6 D; {! F* ~ end 2 a( d* m9 v* o+ c o; M - u3 N( ~! h6 a& H. C// -------------------------- ! ?. K1 J% u$ W2 e7 m// Main Circuit -- TEXT LCD' Q1 x4 N1 V2 a
// -------------------------- , F7 t" R( v7 M$ K1 Owire lcd_wen1;0 ]* t8 L; n% H4 G9 h) }4 j& t' a
reg [7:0] tmp1;" j9 b1 U. N" A3 e; M- ]. e5 K
reg [7:0] lcd_db;4 ` |' E4 X$ h4 m& p: n
assign lcd_rs = 1'b1;6 c) v" `8 P) m
assign lcd_rst = ~rst_n; 7 x( Z, O6 d3 l. T+ Kassign lcd_en = 0; + `8 L. ~1 Q- w5 j( h8 Qassign lcd_wen1 = (min_out[3:0] > 'h5) ? 1 : 0; 8 J0 [9 J. Z. N/ {0 U; v# v9 k% P- _$ I; h: p. e
( D* J- K( d( C6 p5 k
always @(LETTER)) h& }1 D0 S C5 o) z3 _4 t
case(LETTER)# k4 _; P( T% q7 M* j1 p# i
'h0 : tmp1 = 'hxx; - |' v: u! M P. m/ e 'h1 : tmp1 = 'h41; // a # e) ?2 y& L- f: v 'h2 : tmp1 = 'h42; // b 2 P4 F$ M4 o3 [) ~, c8 \! q/ d' o 'h3 : tmp1 = 'h43; // c ( H+ }- e* e8 v& X8 A 'h4 : tmp1 = 'h44; // d ' d B" N7 U0 K3 P% F' r; H 'h5 : tmp1 = 'h45; // e 7 O9 v( K+ L$ c# |# r' c 'h6 : tmp1 = 'h46; // f 5 X7 @3 m7 _9 Y+ I6 k1 X7 m- @; G 'h7 : tmp1 = 'h47; // g , b7 p5 {; i% x: P8 W+ e& J 'h8 : tmp1 = 'h48; // h' a$ ]; E/ P9 Q$ E& A: d
'h9 : tmp1 = 'h49; // i7 z [/ M+ a/ m
'hA : tmp1 = 'h4A; // j- s: d- F* M+ q6 M. U
'hB : tmp1 = 'h4B; // k: U( d. n5 v) J
'hC : tmp1 = 'h4C; // l ) o6 I3 P- y1 s: ?, y2 B; c/ _ 'hD : tmp1 = 'h4D; // m* [0 O( a6 W# K3 ]3 r
'hE : tmp1 = 'h4E; // n & n, B* p: \: Z, I" K4 D 'hF : tmp1 = 'h4F; // o " N* i: }$ q9 ? 'h10 : tmp1 = 'h50; // p; v- N$ d P7 R' F' @
'h11 : tmp1 = 'h51; // q ) E, a) F, O9 c- b 'h12 : tmp1 = 'h52; // r) H# P0 s/ m. j; p( b
'h13 : tmp1 = 'h53; // s; x* R/ h* V0 g c' @* F, I- v! d
'h14 : tmp1 = 'h54; // t 5 C9 d( D5 h6 P7 z1 o 'h15 : tmp1 = 'h55; // u6 @" s/ W+ X. N* A8 b
'h16 : tmp1 = 'h56; // v 6 j. ?3 z4 g# X+ @) o% Q 'h17 : tmp1 = 'h57; // w5 n* f9 l0 {$ \' M( r" P+ z
'h18 : tmp1 = 'h58; // x- c5 a O3 b& s( }+ N+ B$ m
'h19 : tmp1 = 'h59; // y 2 h1 e! I/ T* g, g+ f& R 'h1A : tmp1 = 'h5A; // z5 x+ B( b2 d* [; d1 Z
'h1B : tmp1 = 'h00; // space6 X, [5 z, w7 K
5 U+ k+ C# G1 g6 a
default : tmp1 = 'h00; ( _5 p) b J' G1 g3 t' J endcase8 ?/ H4 ?" M+ q) M4 J r. C
2 b$ ^; P1 }' O/ f9 {& g
. t/ b/ _! o8 B; G6 I! N( `1 u* F
endmodule 7 G/ P: y, b; p( k