|
3#
樓主 |
發表於 2021-5-26 17:25:02
|
只看該作者
9 U5 O# @2 q0 `1 V*-------------------------------------alphabet-------------------------------------*
" z: d5 V) x) V
) z% f4 G B, D/ a6 m4 u, |`timescale 1ns / 1ps
/ p' l7 P( U" I% H/ [3 X6 x" J- v: p& n1 W G2 e/ f
module alphabet(7 `$ H F, Q* K! R0 l, g
input RESET,
7 m$ j& w9 O- A3 D( } input Clk,
) R5 R( I8 I: n" b input LONG,
/ c3 u+ f) u7 q input SHORT,
* c; O% W9 G. X% q input END_CHAR,4 ]5 F* S; o8 F% u* c
output [7:0] LETTER,8 v6 v1 J9 f; g4 b8 ~' `
output STROBE
. _0 t, R0 \- g6 w4 a& Q1 {: Q );! _3 u$ ]. n7 B# b9 P4 C2 S: {
" T+ @, o- A) n) X( ]. H. B
reg[4:0] STATE, LETTER_REG;( l; s- c% O' b4 }
reg STROBE_REG;) M5 T8 p6 Q0 o5 c/ ]
. h4 h$ z& r6 C' d5 D3 |5 Sassign LETTER = LETTER_REG;
, Y. f8 W. d) @+ m# n; yassign STROBE = STROBE_REG;) C2 f4 T% u$ C/ Z% D n
) |, e) o1 j8 ^& U$ E& s/ n
9 z; r( H8 s( `; K1 z
$ y4 q( k( A% P! L+ Ulocalparam; S- x( e" ]' W P4 g0 ^
INIT = 'h0,4 L. R! ?7 h/ S) N- {. |# r* V9 m' l/ o
A = 'h1,
. X8 D" N2 v9 y' }/ s2 t7 F6 ^- y B = 'h2,
' {# Z$ c# ?. A! Z C = 'h3,
. B$ H+ K0 H# R# b9 a0 J D = 'h4,* p0 c6 b( z5 ^, o5 B4 [
E = 'h5,
7 H# a! U( f) l. u! i; W5 P F = 'h6,7 f8 y' O8 P# b6 e0 ^ d
G = 'h7,' F) q7 l6 B1 B6 a5 {" p. R
H = 'h8,+ \. @$ y8 c" O3 y) Q" W8 j
I = 'h9,; }6 E' Q9 Q+ u+ ?, t9 Z
J = 'hA,
3 A/ A& y0 k4 u' ]" Y$ h6 m K = 'hB,7 d) n: W0 L/ Y
L = 'hC,
1 @* H) x) l! }" e M = 'hD,# K% T. J$ n( c; k. ]
N = 'hE,+ |/ _( ~( ]2 [ {8 ~! V
O = 'hF,# t, G2 r- g. \* a! M* g/ y
P = 'h10,4 p2 V) q- U6 n5 y" n" j' P# c$ f" b
Q = 'h11,
6 s, T/ d8 q( Z R = 'h12,
8 |9 q: K$ k6 E" t2 Y* i S = 'h13,
* ?7 P5 F- e9 w) ^ T = 'h14,; Q" b# \4 f/ G* i5 V' O* T
U = 'h15,% F4 _$ B- }( n, u! V8 F
V = 'h16,4 z% k& G, n+ v4 g+ i+ ^
W = 'h17, F% y2 m# d" m5 F; ~' I! D8 Q: K
X = 'h18,
+ s0 {+ m9 X( i+ H Y = 'h19,
- {' g: e# b( A# k Z = 'h1A,
' s1 x8 R0 n- F! m DONE = 'h1B;5 S9 z; } I2 @6 w% o! C
0 u& L9 t* C7 S$ f4 |( r" W
1 J: b4 R( m6 p1 _- W- ~! X; galways @ (posedge Clk)
" b% k9 w7 O3 B8 ]* G* [, o9 _begin! e* [- y0 _- s; j8 @7 O) h6 a
if(RESET)8 G# f9 L: e5 s$ A5 T
begin
& ~; w- h$ M0 X. M8 m: ` STATE <= INIT;
$ D* S/ h3 U6 N0 V8 W2 g/ @ STROBE_REG <= 1'b0;% O! c% z' F; [3 ?: y; a' S& e
LETTER_REG <= 5'b00000;4 C' {& T1 k$ V! Z$ B
end
1 U1 p4 `9 e% C* P! D1 Y% @$ [! d else
( |5 r! L7 p( N# \% W) \. a% W begin& W, n& B+ ?" w
case(STATE)
8 q9 A. z: R$ N! J5 [ INIT:
0 K7 |1 n o- M1 ^ begin6 G+ p U) B' ^+ U
STROBE_REG <= 0;8 D; x# ]* `" q _1 t/ Y2 M3 j
if(SHORT) STATE<=E;6 G; R, s; V+ U! [! O: g
if (LONG) STATE <=T;
+ g4 K; `; R( i2 s0 y" ?& r4 O7 u& b end
2 f8 M2 \7 K; h& F" S8 N' P A:
+ S. k6 p0 N# U' `9 o7 E begin
6 V- p6 E# |( V" _# k/ M9 U2 ` if(SHORT) STATE<=R;* V9 E& \ A. t9 F7 u) e( a
if (LONG) STATE <=W;
& U$ V& }: [- T7 ^ if(END_CHAR) STATE<=DONE;; A. s: X9 V% y" ?( c
LETTER_REG <= STATE;0 b$ \5 c9 k8 f6 E
end
% |6 Q1 ?* |; _) q+ i$ f B:
u4 W+ k6 a! y9 M begin
0 f) ?- _: \# f8 k$ [% k% Q if(END_CHAR) STATE<=DONE;
& R* Y ]- {- z0 c LETTER_REG <= STATE;: i2 u2 u: M t1 B
end8 V+ x b5 \- W) Z* |4 l! ~+ x
C:
% G' b7 o9 u v$ D. m: ] begin* {' B6 Y# {0 ?+ r
if(END_CHAR) STATE<=DONE;
# {8 j$ l g y% Y4 y LETTER_REG <= STATE;* i! R8 C6 r# T! E
end. _3 [) y& A- B/ m2 ^
D:
: Q! u- ^& c$ f4 M$ v begin
! o" t9 a0 n- |9 W: \8 U b if(SHORT) STATE<=B;* q+ |; H% M& o2 M
if (LONG) STATE <=X;
" L; ]1 W' T6 ?) e- ? n/ s3 q if(END_CHAR) STATE<=DONE;
7 u+ R; Q' g& m1 u, U% m7 }, ]" x8 n* K: w* G LETTER_REG <= STATE;
1 v; y. p* W6 L3 J) |/ g; r2 J end% i4 b5 Q. u: l8 E+ W# V
E:2 e/ h( A8 H* ]
begin) }! \7 d. ?6 m; \$ H
if(SHORT) STATE<=I;
9 [. ]3 _/ Q9 [5 F: n% P6 R if (LONG) STATE <=A;
' v6 U$ B8 ?* C* t& S- l if(END_CHAR) STATE<=DONE;. I; _/ U9 Y! x0 _% Q% T
LETTER_REG <= STATE;1 g8 g4 y; Z1 u
end% B: V9 C+ a$ y1 e
F:
0 R. J9 h1 S- I begin
3 H7 ?' z0 j6 Q if(END_CHAR) STATE<=DONE;
# Q3 s( w9 Q0 [7 [( K, b0 a9 h LETTER_REG <= STATE;9 Y% A y0 D) a4 `' Z3 u
end
* Z2 U' a1 ?- Q; L* J6 u G:5 R5 H. b, M8 P. c
begin# b& Q8 `% p T4 O
if(SHORT) STATE<=Z;' n- e( ^0 G G( p3 |7 Q( S- R
if (LONG) STATE <=Q;
: H+ Q2 o, D$ M# R/ s4 e$ E) m if(END_CHAR) STATE<=DONE;
. p, C. I0 Z1 l9 K LETTER_REG <= STATE;( z4 _" C& q+ X/ M( n/ ?
end& y8 e) z. B' }6 G, l
H:
# e) E* k* v+ P; p begin
/ [0 t' X' j2 n8 m if(END_CHAR) STATE<=DONE;) E2 l8 w3 f0 Z% A7 c/ H9 @8 D: \4 a# Z
LETTER_REG <= STATE;
& Y! C) V" w7 }9 X b( D) p8 j5 i end; N ^# }3 @9 Y) x% ~$ ~' o a
I:0 ~" b( b2 h$ Y5 C9 ~8 E
begin% R' H( x( I9 o/ p
if(SHORT) STATE<=S;6 u; _1 f2 p9 [+ z# \5 L
if (LONG) STATE <=U;
6 Z- ]$ g% ]3 C, ~2 t6 z if(END_CHAR) STATE<=DONE;
, b$ g+ D. V1 s9 F* x5 h LETTER_REG <= STATE;* `$ A# d7 n0 N+ D. W* M8 e* g R$ `: t
end& y# ^& [7 p! r$ L& J5 y
J:
) `' ^0 J; O: i& ~2 L% b1 E# a2 _5 Y begin% C# r% z" u, V- Y! y. s: B- R
if(END_CHAR) STATE<=DONE;9 N1 E* h; s% \( G
LETTER_REG <= STATE;' s$ F8 M4 ]1 L8 ]. {- R7 }" z
end
' Q8 W8 z. f- X0 C K:$ t) U% s$ _8 c! k1 w$ m
begin
" F+ A [& h* u, S- N if(SHORT) STATE<=C;
9 D! b6 ?1 S+ k! o if (LONG) STATE <=Y;( N2 Q& ~8 @5 S: j1 ]) V' Q" e
if(END_CHAR) STATE<=DONE;2 O5 y/ t& `2 T) V: l2 i
LETTER_REG <= STATE;
0 P# B& K- L2 t6 p% \ end4 Z# F7 G1 J* g+ c5 f
L:; S/ O6 R0 d2 X+ q/ q; G3 T
begin
0 V+ ]* r' l1 y" N: W) ` if(END_CHAR) STATE<=DONE;
, q' J8 P' [ o' v J LETTER_REG <= STATE;" n" ^5 M+ h* X1 b% ~' p) S
end
8 i% [7 U5 t5 p8 i4 |: c9 r M:
: ~) T, a1 o6 c7 a0 X begin
7 g+ ]& ~2 r9 P7 ~4 w0 [ if(SHORT) STATE<=G;) F/ k* r# K. U$ p
if (LONG) STATE <=O;8 r9 Q& S! s6 V) @( o1 v8 I
if(END_CHAR) STATE<=DONE;
( T4 v5 g% k0 I+ I8 B2 ` LETTER_REG <= STATE;6 \$ X! i: q: [
end X2 R8 g8 ]! z" L) b
N:
5 k7 ~% {, g$ U2 s, x( I$ h begin
) T* z2 e% g" _5 A9 ~ if(SHORT) STATE<=D;
- X( X w* B0 x3 k7 I! h w7 E if (LONG) STATE <=K;( y" E! A* b) k& i# Q
if(END_CHAR) STATE<=DONE;
/ Z: O- B2 H! c/ a! n LETTER_REG <= STATE;$ @% o1 }, m5 {' S
end
( a0 o! e5 C1 i O:' i2 Q$ Y8 `) A3 z/ n) @. g
begin
! W% _# b6 X, a; H if(END_CHAR) STATE<=DONE;
3 j: `- v6 B: v LETTER_REG <= STATE;) p* s" ?7 b' p, v/ F3 Z) m$ k
end
y% E# f4 {1 Q; P/ ? P:. |4 }: |, U8 |7 Q3 @7 z& j
begin& k3 l. F8 e3 J% a
if(END_CHAR) STATE<=DONE;; p/ {' a; r7 a+ C4 M: m. ~
LETTER_REG <= STATE;. C2 a4 m# ^: A# B4 z0 L) m
end' [$ g. f/ j% w: {1 P$ r \2 b! p
Q:
" K+ \8 }- k3 _1 H; b3 n begin7 N# p- b% f7 A" W5 B
if(END_CHAR) STATE<=DONE;
! N& X' T$ ~, I7 `- v4 c5 J LETTER_REG <= STATE;% \2 X8 B5 e1 L6 p: m+ u
end9 H4 J( W* }% w, P
R:/ b) W! `* q- b, ~/ x
begin; {9 g: Z/ a, m! p+ u+ ?# y
if(SHORT) STATE<=L;
4 n j; z+ U7 T; t: V( l if(END_CHAR) STATE<=DONE;
& M8 Q8 Y) n; Y: e LETTER_REG <= STATE; d0 w4 N% ]4 ~, Q: y# r
end1 U3 Z5 E* e7 s# o; L
S:
+ K; E% }/ S# P8 n; l1 Z( s& X begin) o$ k6 l' x' [1 G; s
if(SHORT) STATE<=H;
/ I8 ^- }0 p# D" u if (LONG) STATE <=V;
$ x5 R; ^$ T h* X( |: ?# u5 b' g if(END_CHAR) STATE<=DONE;$ N2 Z/ v$ A# p& k9 K2 Q6 u
LETTER_REG <= STATE;
' d+ t1 W# F! h7 V) w end
9 x# J |3 \" H7 u T:
, C5 V; e5 b) d begin
! p" A2 e) G. _5 O5 U+ I$ o% Y if(SHORT) STATE<=N;
# Z5 m# [( {+ ]& r/ @1 C if (LONG) STATE <=M;6 p& D W) \# [+ a" Y
if(END_CHAR) STATE<=DONE;8 y5 Q. M, o ^1 f9 |
LETTER_REG <= STATE;
4 e( U1 H" W; o% N* k4 S9 j7 T! s end1 S4 b6 A( J7 ~8 U- J5 ~- o7 w
U:0 G$ I. F& P5 o; K, X3 \
begin
2 k6 W) }8 E" _2 B1 F# [0 U: `/ f- O if(SHORT) STATE<=F;
" ?" I [% h; f1 o- ~/ A if(END_CHAR) STATE<=DONE;
7 _8 o3 y R, c; n; S: m# p0 e LETTER_REG <= STATE;# W6 y* I' @" C1 U9 H4 K
end' E/ E# e9 M5 U2 d
V:
$ F. h7 p2 e5 _ begin% }6 `+ `! m; ?: T g8 z
if(END_CHAR) STATE<=DONE;
8 A% r1 b0 c2 b LETTER_REG <= STATE;
2 M, M( C5 W3 b! ~) |' `/ ?! F end
& h+ X {6 ?3 H W:
1 z' @+ Z: I( e5 F1 u" y6 J begin
$ Z' Y4 N6 S' f! M if(SHORT) STATE<=P;8 s* g; m' x2 B' y1 B
if (LONG) STATE <=J;
) I3 f( w/ k! f& _ if(END_CHAR) STATE<=DONE;
+ h: |3 S$ G5 c/ r LETTER_REG <= STATE;8 ^8 H; l# c4 z6 F
end3 i5 ]' z* ^" p! L& f
X:! k8 d6 g) W3 n' n% m6 q
begin
v. j/ Q# p" a8 L2 M6 F if(END_CHAR) STATE<=DONE;
4 W1 k+ ^ _2 k) c% N9 Y LETTER_REG <= STATE;
2 b. E) F9 B) i! [2 e% i end
' x& @. p z" X Y:7 c. q+ V5 M6 S
begin7 K+ q$ S0 A( M$ Q
if(END_CHAR) STATE<=DONE;
. U, l4 B# ?$ j" T7 n8 V1 E; ^ LETTER_REG <= STATE;
8 A% X. d3 H" u2 t- M( x, ^ end
: S: B' D$ N' O' J9 U Z:
- J2 Y. v+ }; y) A begin6 a' Y3 a. o3 {: l, E; ]* S
if(END_CHAR) STATE<=DONE;
: r' S0 q6 J6 \3 h q" i4 t+ `" b$ |' B LETTER_REG <= STATE;
* ` I# J! V: z; v5 X: ` end( |0 W9 _; ~3 B+ v( u! ~7 {$ C
DONE: STROBE_REG <= 1'b1;
0 D6 m) C: X u+ }8 I0 S default: STATE <= 5'bXXXXX;
& E o8 N9 s6 m9 f; S V endcase
2 t! C" h- J2 k% i. l end s3 C1 x% U9 w6 f! Q: I, D% |0 w
end
5 ?2 a/ q# w4 H" N$ @. T5 _. L& p& p: `9 {3 ~5 G- \' G; O. H* t
endmodule) i1 r# X2 G8 s7 _
|
|