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發表於 2021-5-26 17:25:02
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*-------------------------------------alphabet-------------------------------------*. X, \" r/ S+ b" S. _: g+ [
7 u2 j# T! d- K0 v: s
`timescale 1ns / 1ps0 V; O. f7 M$ T, {1 j* t& S. Z: f
; t# `) f% @/ O! Y [module alphabet(
0 y7 l9 y3 Q; O input RESET,9 t6 h( P- \3 t. ?% F) p4 O
input Clk,$ P1 P1 L0 c% Q- Y! ~
input LONG,. Q. Z3 K2 y0 U9 F/ z, U3 o/ E
input SHORT,
% s" j% M2 k* T( \' j! J input END_CHAR,; y5 v$ O4 S' {: d3 P) I' L4 F
output [7:0] LETTER,
/ o- p4 h6 h5 y' w& D7 P3 w output STROBE& W3 l# h) N% k# |( ?1 p2 m9 |
);2 d: N, o- g4 W7 D5 A2 M
+ p6 _. M) f; l& I$ V+ t
reg[4:0] STATE, LETTER_REG;
% } T; q, j& v1 s* l& Rreg STROBE_REG;
) \. Y4 T5 X6 w) H. @/ Y2 }3 K R
4 T/ k: _4 g7 n/ `6 P) ~assign LETTER = LETTER_REG;
* h4 u7 d6 y, C- x: |. G# sassign STROBE = STROBE_REG;
" |! ]3 r$ r! N( D' r0 W$ V# I- ?$ x' Q
" k/ [, T" p: f& D' D1 \9 M
7 K* M; ?8 L1 G# g" nlocalparam r: t6 w7 ^ b* l9 f
INIT = 'h0,! z0 b) Z# l$ U ?
A = 'h1,6 j( g. f0 I; W- C- A
B = 'h2,
n5 X) `' v4 d4 ] C = 'h3,2 ~5 b: m% v6 ?1 L
D = 'h4,
. M, l n/ u4 k k* X: e5 ~7 e E = 'h5,
0 A/ g: c/ Q0 i: v- e0 b6 G F = 'h6,
; \9 \. Q3 o7 Y G = 'h7,% c& `: ~" q, ]: i. z
H = 'h8,
/ Z9 }( P& Z3 F: |! w I = 'h9," h0 n# [; B+ y% d9 ^( H5 e# N
J = 'hA,
' _$ t9 C. c' L6 V, P5 A K = 'hB,
2 ^8 Z# C; H) @8 ? L = 'hC,
+ o1 I( X5 {: v! n# W3 } M = 'hD,$ U# a- w6 B3 x( j0 O' A" Q6 S, p1 @0 n
N = 'hE,
" i1 p3 L1 O- Z' q) D$ } O = 'hF,- h; Q8 k6 n0 q H7 _, I5 u
P = 'h10,
% z# n# J0 ^; E, s Q = 'h11,
% c0 z+ W* R# B: u, [% l R = 'h12,
% j' Z+ O8 x; |1 S/ X4 { S = 'h13,
; A* x2 f+ w& {3 q T = 'h14,5 y+ m4 u" O8 O2 F
U = 'h15,
, N$ d$ ~: v( c2 a V = 'h16,! m& l. q( q& b2 s' N+ s
W = 'h17,8 @/ a. q/ R! ~* g$ @* Q8 v% p0 K
X = 'h18,) s1 K) T" H, r' Y
Y = 'h19,
" Y% v' }# d3 x# x. C9 d+ w+ s Z = 'h1A,/ {- \7 g0 g: b9 B
DONE = 'h1B;
2 s3 n. O7 o9 O; A1 s g6 b& v* A0 ^. ?5 \/ a# m# u9 ]0 h
' ~: c9 x/ q! \0 f K/ halways @ (posedge Clk)
- Z' v0 Y1 O, V$ d3 Abegin
6 U) |5 V$ Z- h) ?; Q- X if(RESET)
, x7 ?( X; {' T0 b begin4 E( B% d# k" J2 z3 H' Y, c6 e
STATE <= INIT;
, M+ n2 [$ o+ O5 f( K STROBE_REG <= 1'b0;2 E& J# t1 o, _; {% W% q
LETTER_REG <= 5'b00000;1 s. H V- i w G
end
/ }. \6 f6 e0 I* x) y* [- i else
& ~& e4 t0 P/ d8 \3 F3 f begin3 C" S7 {! W6 ^: G1 {
case(STATE), P: Z3 ^2 ^' R& h4 q
INIT:
; f; {& _7 J- C begin
, Z5 q3 R, }; w' n- C STROBE_REG <= 0;5 h" y0 }$ | ^! V/ o, X6 y: ^$ S
if(SHORT) STATE<=E;- u4 V# |: Y3 C7 a. v6 n
if (LONG) STATE <=T;
& o2 r U, ^% q' B, Y end
) l/ t0 D% B- q' Z2 D. p A:4 y, f4 Z! E, _1 s8 o6 {- j
begin
) B7 {# l% G, ` if(SHORT) STATE<=R;
) _, Z3 V1 ?, t. H if (LONG) STATE <=W;
6 c6 ?" P4 T7 y8 _* G9 ] if(END_CHAR) STATE<=DONE;
+ `# d$ `3 W% J! _6 c9 ^9 ` LETTER_REG <= STATE;
- w8 J# O# Q" j( F end+ L# |- B: j" [. v4 q- w
B:0 J* W* S: ^4 l5 L4 j Q# C R
begin$ U# o& W: J# N3 c* v1 w+ ~
if(END_CHAR) STATE<=DONE;
% j3 `' ~8 N! @3 U# c$ Y LETTER_REG <= STATE;( T/ }* Z& E$ O
end# U$ t8 d! R( L+ v8 [1 l9 P
C:7 R! @1 ]! ~: Z0 p' c( u) V, e+ G' M
begin
" U/ L. d8 B3 Y" e% S5 m if(END_CHAR) STATE<=DONE;# e' ~4 W1 ^# ^( r5 ]/ T
LETTER_REG <= STATE;
) q7 ?, d. O; `6 w: n end4 w9 ~: x9 ]5 o) K/ j U2 j3 [
D:
$ Y, c; Q" b! c! u" } begin& u Z+ x! c; g8 `
if(SHORT) STATE<=B;+ D8 n; p/ d/ v7 w! T1 y
if (LONG) STATE <=X;
t9 Z- V2 G t. e+ z if(END_CHAR) STATE<=DONE;4 x3 @. k% M8 F9 ]9 ?
LETTER_REG <= STATE;. ~( Q; T6 |, l. F" i
end
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3 \. E+ v7 C- @1 J7 } begin
# f" o2 k4 _0 n8 a if(SHORT) STATE<=I;) j# c& j. X0 p0 `& h" ?
if (LONG) STATE <=A;
& Y' R2 [% R! M4 [8 R if(END_CHAR) STATE<=DONE;
2 C1 ~4 n+ B S. ?4 ^/ \/ o9 z LETTER_REG <= STATE;' K: t! u/ e0 v- f- G: @. |; C
end
M9 m, U+ o( z; m$ H b \ F:) _7 C: k f: \+ y7 s
begin& Q; A/ I( Q8 o7 b: k* \
if(END_CHAR) STATE<=DONE;$ C' }5 m( m) M& }! J9 K1 ?
LETTER_REG <= STATE;
" M6 x3 z* P1 ~; v" m end7 P/ a% x3 d0 }6 n; |( y7 Y
G:
7 l# m# f0 w% b, |8 M4 ? begin
0 X8 z* W% M( P( I3 m% y6 E. Z3 q o if(SHORT) STATE<=Z;2 a1 ?5 p0 U) W( y- [
if (LONG) STATE <=Q;
0 ]6 K1 L' g2 ?0 h5 d if(END_CHAR) STATE<=DONE;/ `7 r' g, j# W
LETTER_REG <= STATE;
; H4 ^0 \ c3 ~ end
1 X8 U7 e. x* h9 L H:# B3 L9 [) x v! m# o! X+ e, n. X
begin
, i9 W- `* i1 M/ |: C) w% c if(END_CHAR) STATE<=DONE;6 N, h7 d* k- a1 B4 t$ ]$ O
LETTER_REG <= STATE;/ Q2 w5 m- |' X z
end+ M6 ^$ D0 t9 C% |" u. x* c6 O
I:3 }5 J0 d1 L6 \ t. j5 t8 t5 w! |
begin6 H% D8 R. ^5 ?( j- I1 ^. H( P5 X
if(SHORT) STATE<=S;% R8 K4 y4 Y" L5 z8 ~) r- ^
if (LONG) STATE <=U;5 R6 h1 }( _( k, o
if(END_CHAR) STATE<=DONE;
9 M5 n; {6 v( s; F& a, F7 X9 z1 J LETTER_REG <= STATE;
: d5 \2 D s- c! A6 M end
4 d0 R0 l( `5 H J:
' q5 L( d- o3 B, v+ j begin3 v0 F9 u( P) \2 l4 }% l1 p! k/ d
if(END_CHAR) STATE<=DONE;1 _% ~: s1 o) }
LETTER_REG <= STATE;1 v* B- K4 |* G
end
; T( F9 W0 D# [+ e K:
! g6 I9 f$ G- u! j, _ begin1 i5 D1 c3 W9 g9 n- k7 t5 n
if(SHORT) STATE<=C;7 ?; a3 z+ a0 i* T# j% S/ F
if (LONG) STATE <=Y;& V/ ~* U3 @+ ] A7 d1 S+ x
if(END_CHAR) STATE<=DONE;; ~; w% h+ \; c7 A& x! E
LETTER_REG <= STATE;
6 p. p; H. Q0 y0 Q( P end
% s8 f9 C! J1 T L:
! M; M( w% ], T5 Z( \, u begin8 ` [# r# V6 g# s: g
if(END_CHAR) STATE<=DONE;4 }; f- w* o e7 l5 n/ O. s
LETTER_REG <= STATE;: S0 z7 a$ b. J( o! F$ p( o
end
0 r$ k1 f4 q! I- ]! ?- _ M:
7 b% \$ x: e: W# u# C9 l begin
& e7 t% p$ X; Z+ X+ S3 ^ if(SHORT) STATE<=G;$ _& `% S s! ?7 c
if (LONG) STATE <=O;
7 U( Z$ o* d6 N2 C+ [ if(END_CHAR) STATE<=DONE;1 U. i: {6 j7 ^
LETTER_REG <= STATE;8 O5 q% v5 `+ j+ _; a: V( h
end
& k2 g. ~0 P+ f! J* Q) W. U N:5 O: J4 K% Z' s9 |' g7 m( z
begin4 `' w3 s' X4 T
if(SHORT) STATE<=D;6 }9 I( F9 M0 H! g1 S( j
if (LONG) STATE <=K;0 E4 {& M0 t# E
if(END_CHAR) STATE<=DONE;% b7 z3 {- J* n" Y/ B: S( e. q
LETTER_REG <= STATE;
. y7 U7 D7 d6 d- j5 j/ D end P9 Y+ S5 v/ g; B
O:
% ^6 K3 F* U2 n) e2 q begin
" k9 s0 |$ E& g- {+ }+ O( M if(END_CHAR) STATE<=DONE;/ o% _& L5 Y' @3 l) ?- R# f& V
LETTER_REG <= STATE;* |$ f: T0 f. t: t J/ [, `* I
end
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begin7 ?# m0 a/ x6 b% g8 N% ]
if(END_CHAR) STATE<=DONE;; ?/ ~; `+ ?4 x; P0 n; S
LETTER_REG <= STATE;
/ x+ q( T- a/ [( H$ ?1 c7 R2 r end( {3 t. \% h: i- _6 H
Q:
1 r. h" W1 k7 u7 e0 f: C begin
9 ]. H: n2 P/ G if(END_CHAR) STATE<=DONE;
" M! X7 l3 M Y. I LETTER_REG <= STATE;
3 U Q, _2 ], v0 ^( | end3 u" ~9 H$ `! X
R:
1 V/ x2 m) `% M- e; ]# o begin
. E5 U2 \0 R4 d( x if(SHORT) STATE<=L;& v2 Q F3 N8 r0 Z- ?* e$ D( j
if(END_CHAR) STATE<=DONE;
) w) } n4 ]* K: p. l LETTER_REG <= STATE;
0 u1 o6 I: T L' T/ P9 k0 E( p end6 [+ J. t5 y, ^1 N2 O# Y. E) b
S:2 \6 }2 i9 K: t% f1 c
begin
' f5 S+ @& ?) U% c6 M2 o if(SHORT) STATE<=H;8 t8 ^% R# J) V5 s+ e
if (LONG) STATE <=V; n' u) U; q% s- F" d
if(END_CHAR) STATE<=DONE; c$ Q1 V6 G3 M1 f7 q5 z9 e
LETTER_REG <= STATE;
7 S) n8 s0 B# q+ @ end j; S* U5 q/ G3 A$ }, A. x
T:! ~5 a7 q& h* O, r9 W8 g2 n- w
begin
( g1 o) O- e8 c4 k if(SHORT) STATE<=N;
/ W: m# E- b/ y: g: E' d if (LONG) STATE <=M;
1 b5 j7 m. {# f3 e D5 T2 M if(END_CHAR) STATE<=DONE;# A8 N! y; Q" U9 B
LETTER_REG <= STATE;
& B* ^8 G' i7 r$ K end
- |" \8 S- O( p6 e) H U:
; |! K1 Y/ D7 u1 ?) e1 S. K begin w/ U; o- g8 s/ l& w; R
if(SHORT) STATE<=F;
" n. h6 `/ n1 J" l# f if(END_CHAR) STATE<=DONE;/ \5 V: n; X s2 X5 t# P3 g' g" x
LETTER_REG <= STATE;
' g" J+ J( Q# {/ ?9 o end
$ n5 i5 v1 K: G. z3 Q! C V:
" ]+ |& _( T6 N) u* g begin" T; g4 H/ N: l M8 w' J
if(END_CHAR) STATE<=DONE;7 }# f& i2 V" l0 r, J3 n7 g( \) w- w
LETTER_REG <= STATE;# d; v3 e5 q4 V5 L$ ] t; g
end
; r( n' F/ G/ o+ |* ` W:$ x6 P* X& C6 ]& K9 R D$ {
begin3 k) L& D3 I% I! C
if(SHORT) STATE<=P;$ j& f# ~1 u$ C
if (LONG) STATE <=J;
7 Z f& a% U$ J7 v6 j6 M if(END_CHAR) STATE<=DONE;+ b Q: [+ I+ C' x5 J4 ^+ N
LETTER_REG <= STATE;* n# [) h8 {0 \; i2 h! W7 V' D% \7 I
end
0 e0 N& c$ D; D* l, Q4 |! Z X:" y2 s9 M7 A. G% X2 `5 P- @: B
begin
0 |9 T3 ?) W5 \: a9 c# ? if(END_CHAR) STATE<=DONE;
! |7 Y8 D% |& K% N LETTER_REG <= STATE;
; m! w& X- y$ A: E) R end
' ~" d. P. A0 m' F Y:
8 e U5 @7 T7 d% Q! C1 e, v begin
" F2 F% v0 q" V& s7 k* m7 m% l if(END_CHAR) STATE<=DONE;
1 ~& p3 h0 f0 j4 E7 g LETTER_REG <= STATE;6 U% u+ t% i. I* ?" L- D& T7 U
end
1 B) ?0 ]4 { ]& y/ r4 P Z:
$ A/ ]# d q5 K+ L* p! U. E begin, k0 O3 v. M+ B! H- q. r* E
if(END_CHAR) STATE<=DONE;8 X* ?7 I9 d- r8 n3 ?
LETTER_REG <= STATE;
2 i2 t a( ]) I end5 G# y2 o( x3 s4 b! k
DONE: STROBE_REG <= 1'b1;4 L9 t* g% k% I$ T+ `$ w3 h8 P" R
default: STATE <= 5'bXXXXX;
2 Z8 R I- ^# J { endcase
% Z) \" D6 V1 @3 {5 _, X" p2 J$ z end
: P& {, N+ y( w8 q2 G gend+ {. R% `7 O& p
7 E5 T$ |( m* n. [+ }endmodule0 \# {% Z' y9 I' V9 u6 L
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