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發表於 2021-5-26 17:25:02
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+ R- T' z `& d* B3 |5 t*-------------------------------------alphabet-------------------------------------*. Q( Y6 B- f% S
7 t0 q4 f( m, D6 b; Z
`timescale 1ns / 1ps# t2 T9 ~9 V; J9 q+ W
# o A6 ?2 k" C5 F2 }/ a2 nmodule alphabet(
$ l( I) r& B' X3 c; g input RESET,
: O" u+ `* F/ r f! c input Clk,
& J# a5 I5 u- e( C2 G% W input LONG,3 S8 Y0 P7 g* q+ i
input SHORT,- \2 w1 h" u( v. ^, t$ w; c5 ~
input END_CHAR,
9 O( C. l- u+ O, g7 z \" s output [7:0] LETTER,: m8 F+ p0 t1 L: b
output STROBE
+ H9 _% ]+ k, N f% ~ );5 E$ I& J$ l, c w3 E i7 v
* U/ R% ~6 V @$ B. L } c; Ereg[4:0] STATE, LETTER_REG;
2 n8 P+ w) [( R! ]& E3 ureg STROBE_REG;6 G) R6 H1 o* p5 p& D7 {0 D
+ i" h/ x( @: g; u! ^assign LETTER = LETTER_REG;
! t/ Y" p. E# G+ ^; sassign STROBE = STROBE_REG;! d6 m4 g( T2 Y) b6 k0 q2 H
3 q4 G' V$ O: H0 U
& R4 D9 O0 _, q0 o8 q
8 Z& u# p" y7 D' `) s' Slocalparam0 l. |+ m" N8 G/ c2 t
INIT = 'h0,
& S, A* p G6 r; E0 a A = 'h1,2 f1 x5 h* t6 G* C% y0 n- s" g6 L
B = 'h2,( |) L$ m. |8 b" \
C = 'h3,: n* [1 K% q) P, u
D = 'h4,( G1 ]8 \) e/ |) r; k3 y
E = 'h5,/ F" V/ S" r! E. t) U* N b. F% W
F = 'h6,5 \8 N/ y6 t2 g: X# s
G = 'h7," V& E- e( y; t( d' H: N
H = 'h8,
4 \! ]3 o$ x. d4 {4 `/ a; S I = 'h9,
! v6 G1 G- z7 U* i1 O J = 'hA,
; b6 q3 _9 x( P* E3 }; x# ~ K = 'hB,4 ]7 g) Y+ X5 w; M3 G
L = 'hC,
# n% f- w* w, P% P' q M = 'hD,
9 b! c' E+ V9 x: |$ P N = 'hE,
% _3 E6 V0 ^# q5 y O = 'hF,; G& ~$ h& N6 I4 Z
P = 'h10,+ U; ] G! m E
Q = 'h11,
1 M% F2 c8 D" M" R* ~ R = 'h12,' _* Y& V: ?5 A. h4 J) Z: L
S = 'h13,
4 e7 t% Z' x m4 y T = 'h14,
* F5 M% s0 S! u* H U = 'h15,) p) z; k& e% I; K ]! j
V = 'h16,( j9 X! Z6 q5 ~. h/ q3 J) q
W = 'h17,/ ?5 l' U6 q x- k
X = 'h18,, Y& j$ M S# L: d/ j
Y = 'h19," V$ Q5 D$ r( O
Z = 'h1A,
, D o* ]% G6 q& [( ] DONE = 'h1B;
) e% @9 Z: S4 G4 E2 n% d/ Y
9 w- ^, Z* t4 e: ^$ O" V2 l) H( @( l& \+ ?" ~/ A" Q
always @ (posedge Clk)& x. A; H. `' ?' w, P+ F
begin
. e/ O) t1 p- i7 j if(RESET)
1 ~ l! ?+ A7 V1 B) }* @# d+ S. \ begin+ @; B2 p4 U# y* P
STATE <= INIT;
% p! q& D6 w% T3 E! C8 u: S# m STROBE_REG <= 1'b0;8 k) O( @9 X# k. C
LETTER_REG <= 5'b00000;
6 h' R8 H* D6 [+ N end, I2 Z; p9 q1 t3 e# |" ?' {
else4 \7 G, X. u+ Z
begin
( J$ \ I% ` P4 c: x case(STATE)! |! ^: X3 x5 j5 B( P& }0 w
INIT:. A, T5 c' [, O: s) Q6 `9 V
begin
' P" \6 T* Y! m' B8 s STROBE_REG <= 0;9 N a3 e6 F4 C# [2 W% u2 Q
if(SHORT) STATE<=E;5 ^ H9 [# D; w) v: a
if (LONG) STATE <=T;. n9 S8 i: l1 r+ \, o$ u9 Y
end
+ M# Q- T- Z) a0 i A:* ~0 b) f+ D2 E! \0 P' z8 C
begin
% k2 A, M3 b( q9 S" | if(SHORT) STATE<=R;! r3 n8 d7 n7 J8 e0 k: b/ Q
if (LONG) STATE <=W;
' c$ A1 s& |7 L* w) _ if(END_CHAR) STATE<=DONE;
5 }+ Q ~ D, S: Y8 [ LETTER_REG <= STATE;" V% i0 m& _4 J: ?
end
% O4 F% J2 h& }1 a. r! w B:0 R$ C M) O: P3 C2 i
begin
$ c6 V% Q2 l/ c7 T/ v: e if(END_CHAR) STATE<=DONE;
# w4 H: O9 d# b. r) |. Y, A LETTER_REG <= STATE;& l0 m" Y5 a" N9 Y9 l2 t' K. J
end4 C9 [" B% ^+ T+ ^3 Y$ ~# f, j
C:4 O( G1 N- r' T/ h7 K+ R% \4 ]
begin
. ?& {, X4 G7 N2 `* v if(END_CHAR) STATE<=DONE;
1 a& e7 q. [! {9 s. K LETTER_REG <= STATE;
% `$ P& K% y( L' }9 D: ] end8 x, O' w0 L- K% `4 O
D:" Z& a' w0 E4 ~ I" J: F* s
begin% E, d7 z& z" X& r8 B3 ^& r* @
if(SHORT) STATE<=B;
' s3 S- W: X/ D" D) a" J if (LONG) STATE <=X; ]* X1 C% @; D. B
if(END_CHAR) STATE<=DONE;& ~7 ]8 J! q) w. W D) ~$ \
LETTER_REG <= STATE;
1 j8 V, I4 p: I# O6 j) d6 | end/ g2 Z# Q2 V8 _% k7 E- Y- a& m
E:
' h6 j0 _. E- H$ N9 a d begin4 E- X, W5 I4 A
if(SHORT) STATE<=I;
; l' p1 v- x; Z if (LONG) STATE <=A;8 m1 \; {3 P# D* {
if(END_CHAR) STATE<=DONE;
1 k8 h1 e- ?& \/ \7 f- ` LETTER_REG <= STATE;1 d/ o! ]1 Q2 D* s) ~- ?" p
end
+ q* ]9 g6 |4 s' W: G; G5 F F:. F+ O3 a% a0 E, S2 h
begin7 W3 T7 x2 A4 `( R8 T3 j* S2 n+ I
if(END_CHAR) STATE<=DONE;* e9 K) U2 Z. ?3 c! p
LETTER_REG <= STATE;
, {! H4 K3 C: G/ U end
1 g `4 w, ^1 s) t G:
V" [5 }( v9 l2 l9 P! f( h& f/ e7 s9 S begin& }" J! N1 C) V7 ^; a
if(SHORT) STATE<=Z;7 ]& H5 Y e% m8 S# t
if (LONG) STATE <=Q;/ h6 n$ v1 I" E; {& q. \. u2 w
if(END_CHAR) STATE<=DONE;! ~5 u" \& b P, `& C
LETTER_REG <= STATE;
5 e7 x8 I7 V2 r% {* \0 L9 A& E end
m* N7 n( b7 N3 u! p: j6 Y H:
* |1 q8 J# h7 q& l begin
( t* e, r) h+ f# U* [ c5 M4 m if(END_CHAR) STATE<=DONE;( H- ^! }6 S* R" \ L
LETTER_REG <= STATE;1 o0 q% s6 }$ ]
end
) m9 q4 H8 ?. N& g/ K Z3 u I:' y$ }) D9 f- _0 A
begin) D0 }: A; |$ H3 I5 s
if(SHORT) STATE<=S;/ b+ ~3 _$ q/ t* M
if (LONG) STATE <=U;2 b! f; @7 F3 v
if(END_CHAR) STATE<=DONE;3 Z3 Z; U; k0 b6 z' z
LETTER_REG <= STATE;
" _* s4 |$ [/ {5 m# V end
' C7 N% s; V( C8 g7 s; J4 d( M, w J:( h% n- j; q1 W# F S; c5 \
begin
/ b* Y; t* S( _( P) \# T) D if(END_CHAR) STATE<=DONE;
, n& r8 m- h( L8 h2 o" f2 H' v' | LETTER_REG <= STATE;
/ ?: A- R5 |! t/ F: F# | end
) g) i( O) q. r/ E& X: ]4 s/ W K:
F, T: S$ J9 w$ p5 W7 _' W begin4 S( [3 g, E* h0 {% |8 O
if(SHORT) STATE<=C; k Y0 m# W4 _, j2 n# v
if (LONG) STATE <=Y;6 {% \* W$ l S0 q
if(END_CHAR) STATE<=DONE;& `6 z# J; ]1 h/ u Y
LETTER_REG <= STATE;
0 j2 }# E! u' C% c$ l end
2 F3 a0 X4 s# k# M0 i, r L:* O9 U( n/ A# H6 g6 c5 {
begin
5 H% n1 k) s {0 j5 B& | if(END_CHAR) STATE<=DONE;
& M7 A& `9 @- y8 C/ [* |" U4 Q LETTER_REG <= STATE;
! m+ E, L3 \5 L5 A end
! @- Y) h+ x8 u9 `4 |1 N6 U M:; n6 j4 c" R) U' g; d
begin
. q% C+ s% m$ e* G0 T% X: q8 _ if(SHORT) STATE<=G;
4 h, y1 F" O( U if (LONG) STATE <=O;
# E7 V3 k6 g2 a3 C; I5 f1 W s if(END_CHAR) STATE<=DONE;
9 ^5 f6 ?( G2 T& h2 a$ m5 q LETTER_REG <= STATE;
* I9 T( r* i. t" x" w/ _ end+ |( Y- R! K; k
N:
# H' o: B6 G8 r' z. D' g1 T begin
: Q* N) y( R& T: e4 E if(SHORT) STATE<=D;6 C% }/ D S/ U
if (LONG) STATE <=K;
! `! m4 U) w( S/ C) F if(END_CHAR) STATE<=DONE;1 p& L5 r' ?1 w+ ]+ j9 b
LETTER_REG <= STATE;
, x! D: |4 R3 l' O end3 v6 G9 P/ k- T4 `: N1 Z, X
O:
z$ n& v5 [/ E; m3 r begin- I& z6 r$ o; n1 @2 b8 ~/ S
if(END_CHAR) STATE<=DONE;
. W* d7 y$ t2 \, s' x+ o LETTER_REG <= STATE;
8 ~- S& {3 S- f& A9 i* w. O5 c end+ ^8 X* N( X6 ~
P:
9 x0 ]$ c d0 Z0 N. j+ w, ~ begin* h+ Q" o8 Z! `5 R: b: x# @6 [5 ^& c
if(END_CHAR) STATE<=DONE;/ K* y6 v- ~9 w5 I, S9 q/ _$ Y4 A
LETTER_REG <= STATE;
3 Q. W; C* o: |+ V end
1 F) V) M, T1 }* ]' F* l8 [0 O' d Q:: i$ h' z: K4 f( c
begin/ ]4 r+ Q2 {* g! N7 S- J/ v
if(END_CHAR) STATE<=DONE;
3 X, Q' X* l. p+ q$ r LETTER_REG <= STATE;
8 @: F8 E$ [. k. N3 K' U end- V- G# _. Z( W4 D: U; w0 Z5 w# c3 h
R:. x! B7 w/ ]' F/ w$ a) L
begin% r% F, ]4 A6 u/ r& F
if(SHORT) STATE<=L;
7 m" t, e- `( } if(END_CHAR) STATE<=DONE; K+ ?/ d1 K8 A* |, j5 {
LETTER_REG <= STATE;
, y `& u2 d2 p9 z7 T- V end$ p4 g! J/ O$ w$ C7 O& E
S:
# L( N$ k! g) N- @ begin* T) w" i8 r: _: a# e- _, l
if(SHORT) STATE<=H;3 X. B. t& k- x. ]1 u; c& [
if (LONG) STATE <=V;
7 Q2 ^1 d; w7 e if(END_CHAR) STATE<=DONE;' p' O5 c0 ]( S+ |
LETTER_REG <= STATE;5 V8 ]" ^$ e9 P. j
end
) t3 U' j* j- p* `1 L T:) M; J! e7 M% { o$ M7 |+ X; @8 V
begin
1 |" ?2 ?3 Y' a+ \6 r/ v6 i if(SHORT) STATE<=N;: J) t% \9 h7 H: B
if (LONG) STATE <=M;
! t S" r! y; j- i- `, Q. O if(END_CHAR) STATE<=DONE;
" A9 y' I6 ~/ t; h/ r9 E* C LETTER_REG <= STATE;& M, J5 {7 I1 }9 F2 K% I
end
! e& F2 G8 t, s0 M/ y; u U:# r( Z r9 I) ]; x+ U
begin
$ S% [/ L" {9 Z% N& f if(SHORT) STATE<=F;6 c0 Y4 q, k" n3 p9 c: s3 ?
if(END_CHAR) STATE<=DONE;
* j1 I n+ J8 i0 N LETTER_REG <= STATE;% F8 m# d& s' c5 C2 m
end' U/ Y* x0 D1 V3 f, w3 u" B: A
V:
; L3 v0 M6 T9 k: K4 Q begin
' N( w& j. c2 `' T0 ` if(END_CHAR) STATE<=DONE;
" j4 q5 _& [* E9 S2 f LETTER_REG <= STATE;. O, J5 e7 B/ R. x+ P& N4 i/ @
end& t8 b( F8 O5 t& ^1 g0 w
W:# R* R* b4 D! S: `/ W
begin
6 r5 f' D! E! R! p if(SHORT) STATE<=P;# W" K; T6 S' t3 Q$ e2 G+ C
if (LONG) STATE <=J;4 v+ ?. C; D: i
if(END_CHAR) STATE<=DONE;/ G! G. b7 G% U @" J
LETTER_REG <= STATE;4 v1 M4 u b7 a k- \3 N
end
8 W" E% ? s; n+ W7 D0 |3 u X:) J% n$ i$ n% U8 N
begin5 q% I; I4 f, U8 I! Z
if(END_CHAR) STATE<=DONE;
1 W# ^" x4 w/ q" S4 [4 `" ? LETTER_REG <= STATE;
q# c. S% O, L+ M$ o9 u. n4 L6 g! _ end
K6 L0 `$ `+ r9 x4 z Y:0 @; |1 b7 l8 P, C) I. a
begin, ^: o1 h( _' A1 e% x# ^3 p
if(END_CHAR) STATE<=DONE;5 J7 K# ?" w" W8 T
LETTER_REG <= STATE;' I9 L4 @! a5 ~: x+ n5 `; [6 Q
end" U9 F6 B: c( T% x3 I& U, X( B! k
Z:1 n; R) N# }2 H
begin$ ?2 [" B: |& d0 `% L! Q
if(END_CHAR) STATE<=DONE;
% ?4 X! Y% o+ Q) _& N& i3 R8 @; m LETTER_REG <= STATE;( a L7 a5 f$ g2 K8 g* t/ Z) D
end0 _2 l, B8 O* F. I# n. {- G
DONE: STROBE_REG <= 1'b1;
0 A5 u/ [; u% e& E6 \% e default: STATE <= 5'bXXXXX;+ m% m, {1 A+ u) q) k
endcase
, W) ^& Y' J# H- z5 M& r/ x end
) |3 L" U L7 A: X2 o# S9 jend
q; `/ t7 L2 }2 o/ i
! f* b" }3 g3 E9 y% Uendmodule. [4 B9 U- r4 H" P6 p
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