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發表於 2021-5-26 17:25:02
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7 g4 ^; D9 w, W- E* w/ g*-------------------------------------alphabet-------------------------------------*: F, _6 a! K- K9 ~: _7 R& B
/ ]8 {% c7 v p d W9 k; P) |8 b`timescale 1ns / 1ps( J8 Q3 }' r- a+ O" u
) Q* I( l6 G% a7 C
module alphabet(% e D5 p* w( z3 I4 h6 Z) k
input RESET,
$ D. s" e. P+ L6 ?* m- k input Clk,) t7 B0 f0 i' M5 x3 o! U6 ]# O. ]
input LONG,
6 `2 L7 f% @( {# F3 R input SHORT,
! Y. N) d5 I7 C% o7 P. b input END_CHAR," L! C0 _8 ^( d9 A( ]
output [7:0] LETTER,
7 f3 m% M: E* S" a% { N output STROBE3 ?/ ?) ? J9 @" E
);# n2 l6 c8 s( _0 R6 z* t" p
* M/ A- z3 \! g1 {9 F; |- H
reg[4:0] STATE, LETTER_REG;" }+ f8 l% N+ o2 E0 S+ K$ i- S
reg STROBE_REG;" I. R' C$ R* k/ O- p
7 k, o, S* X6 _+ l a" {8 p5 X
assign LETTER = LETTER_REG;
; d( q( o" I' S& G' Zassign STROBE = STROBE_REG;; l f4 z8 \% z4 F5 E* c4 B; ^! Z
F. i! Y* ]' v9 W/ |* h( ?+ o7 v* m1 `* x
! y" b! f' U9 ^" I( L+ O2 plocalparam
' ~, A$ x& C0 S/ f0 z) x5 P+ H INIT = 'h0,
, G. \7 d" P/ e) B+ ^1 Q( @ A = 'h1,) d3 j7 \# t F4 h: h
B = 'h2,+ s% |8 ~- R1 O3 A2 ?# U
C = 'h3,: P! P1 {$ h( t
D = 'h4,
# S H: _+ F! m1 ?% J* Q E = 'h5,2 b `# p {& g- x3 T; w+ A5 A. w% S& F
F = 'h6," p( l+ ?" h4 k, X+ ]$ O
G = 'h7,
3 }( x! M0 j; H* M H = 'h8,. y4 D+ y; f* @9 }& [( ~
I = 'h9,: b2 i, T6 I/ g3 g4 D
J = 'hA,% c. D0 d8 O9 A8 L" L& ?" U, w/ G! M& F2 |6 G
K = 'hB,# f7 J- p/ ^; E( u5 e- u
L = 'hC,6 r4 G' ^$ W3 f& S' a4 L
M = 'hD,
+ A; K* z- X6 c$ y* ]/ c N = 'hE,
- X' a4 O* b9 e r! N O = 'hF,2 ]6 A( T3 `! k: S1 S1 W1 N- W
P = 'h10,. L. {# U" D% N* Z& u1 U
Q = 'h11,# c3 u$ q/ c7 A* J" Q) L
R = 'h12,
; n6 k( K" N2 k4 J# s S = 'h13,
% [5 S5 H/ w, I/ x1 g5 e T = 'h14,7 f% k6 `* J- l7 ]2 Y5 _9 [! x
U = 'h15,0 a- `0 I7 M# S+ I
V = 'h16,
0 t& n/ [ r# a. Y6 c W = 'h17,
, D2 s6 j% K) Z1 V3 s X = 'h18,$ `) a2 `- g4 I: y5 U
Y = 'h19,
: [. x1 k- o- X- f Z = 'h1A,
1 T" y% q E; h9 Y DONE = 'h1B;3 l3 L$ f$ s! O& G
* A- A4 m4 R& Q) ]$ V* c
N8 J4 a( ~( V, V6 M& v
always @ (posedge Clk)% X! h- ^, i4 B T/ D8 N7 N
begin% p" q. u3 G: Y6 z% H; Y
if(RESET)$ N; n4 s5 B: o# W) d! O
begin7 {: H5 |3 p: H) {( T
STATE <= INIT;
) Y: J0 R; m: N% r; p; W STROBE_REG <= 1'b0;
; F+ W0 i. \4 J) s. ] LETTER_REG <= 5'b00000;6 f( I9 \7 M! b5 K3 M# x9 m
end5 _% [( @8 {7 F: O5 u% N
else
! {- b+ G; T2 r9 t# p% q begin
' d8 @8 W' {3 }) t& j case(STATE)
- P& U3 p& m2 ?. L INIT:: c1 V. [# }$ {% J% J* k- Z( K- a
begin
5 x* Q K; Q1 Z" S STROBE_REG <= 0;) O" c+ i" b2 i6 D# b) m! I
if(SHORT) STATE<=E;
+ r) O ^! R. [, V: j if (LONG) STATE <=T;
/ J. U6 E- I$ h end) T* O7 G+ C W
A:( J: M; q% q, x6 W+ O" ^4 O3 Z
begin
$ P$ T9 T+ z" Y. M c. u* t* T if(SHORT) STATE<=R;. w- \' {: @, d+ x; r
if (LONG) STATE <=W;1 j: G' a* h' M/ l$ X6 p" N
if(END_CHAR) STATE<=DONE;
0 m( |0 H# z$ s" a* P( R LETTER_REG <= STATE;
0 B( g! l! [6 j& M end
( ?( P( y) g( d" \& l4 P& ?$ {6 V B:
0 D3 }3 E' J* O, V# a7 o' u, j begin
/ i5 j1 _6 Q* ] if(END_CHAR) STATE<=DONE;
( w Y% D" L4 x9 B9 B LETTER_REG <= STATE;; c" U+ U( f8 ^; C) V
end
' R, ^! b6 e" f C:
1 M6 A5 V6 ^* s2 m9 G* W3 X begin0 m' c! g& l# f t7 r* ^6 h
if(END_CHAR) STATE<=DONE;& r8 i5 e3 m5 {4 b X/ K% @" [
LETTER_REG <= STATE;
9 [6 t' B$ V) l end
3 l2 F6 x+ L" C2 q+ @7 r D:
4 W( B% Z5 ]0 k. O# ?4 ?( E begin( k8 }# V; g1 N0 F, U5 z5 s# B9 i
if(SHORT) STATE<=B;
6 J5 A' K" X& Q) y/ J if (LONG) STATE <=X;5 Y/ }) p, w& U: _: B# u; [4 p
if(END_CHAR) STATE<=DONE;
4 b( D% _! h& b% w LETTER_REG <= STATE;7 f6 B f! P- x. g' ]/ y
end
' W% q3 v0 y9 k" ] E:1 |$ J! ]4 R% `
begin0 [+ X2 J7 r3 ], E9 Y9 q, i
if(SHORT) STATE<=I;% Q# p. A' } {- T1 A; V6 l$ O
if (LONG) STATE <=A;
: ^3 ]8 ^' k1 _) P v6 b7 Z$ F* N if(END_CHAR) STATE<=DONE;
. _5 t' f" R. e3 @ LETTER_REG <= STATE;0 E0 A& K% M4 j
end. l9 C7 r. U; F- ^. }
F:4 _7 `. B% q- t! @- H* o3 z
begin4 D( l! A7 i; c$ h+ q. _. ~
if(END_CHAR) STATE<=DONE;2 b r* b: e. W, B) E6 }! l! h! t: {" E
LETTER_REG <= STATE;1 `0 H* z0 y' u6 _
end
( `9 h9 s4 d: T, b; u6 E G:5 U; Z! c" ?' w6 H' i
begin, T- V4 j# x4 h/ V5 |+ u
if(SHORT) STATE<=Z;
1 U$ K2 K w6 [ if (LONG) STATE <=Q;' e) E2 I& b% }2 a x+ J
if(END_CHAR) STATE<=DONE;
- y3 P( N3 o: S4 m- U) S LETTER_REG <= STATE;! t: @' H1 k! ]: s4 Z! _+ ?
end
r. \5 ]# [& Q. t9 F2 |7 X1 | H:
' x, Q; g+ D% [: l4 d begin
. s! K0 Z6 y6 a, f. K" X/ n+ d4 Z if(END_CHAR) STATE<=DONE;1 G4 F8 T+ Y, Y& m
LETTER_REG <= STATE;
/ z8 C8 Q7 P9 K+ C% C* @! F& ~ end4 f8 P7 s1 h/ y/ F* V5 W% |! e
I:
4 g& c( B& S% ~$ z3 F begin
8 s/ g* A3 i9 @( Z1 k if(SHORT) STATE<=S;
9 d! z6 l, ^3 w# ]3 }/ T if (LONG) STATE <=U;
y* ^9 Q; x6 A if(END_CHAR) STATE<=DONE;1 y! t' M% W6 Y! k% v2 P
LETTER_REG <= STATE;
: W7 a+ O, v% D( d( s+ | end
( A% E, J8 \2 ]" B w6 f: G, ~9 C' V' { J:1 k0 ]1 ~5 C+ g
begin5 X( r" T" n2 r% g% G: @+ Y
if(END_CHAR) STATE<=DONE;
5 t/ F, U$ X3 U9 H0 C0 l LETTER_REG <= STATE;6 B) W5 ^* g" v) C4 d
end
- u! l7 u9 W* t* b- R K:( d( S8 V& X6 N' u1 S1 @2 V/ _
begin
4 r8 A) C. q5 w if(SHORT) STATE<=C;1 @; m( w# y! Z' }( d$ S: D
if (LONG) STATE <=Y;
. S) L: I5 z* D2 ^9 J4 f8 Q3 V: k if(END_CHAR) STATE<=DONE;
- V3 Y0 n- o6 w7 \! y8 |, J0 b. Z LETTER_REG <= STATE;. T; H, J, g5 {" i" h8 i
end& y0 d3 T, n! ^" _# i- g+ j
L:
( a+ Y$ Z& ]% w) k" N. } w begin+ {. b1 i7 t3 H/ v$ f2 L9 c
if(END_CHAR) STATE<=DONE;+ E S1 |# g' x3 t
LETTER_REG <= STATE;
J2 R: K# g$ r! \- ~9 x end' {& B* Y, M' L+ U- S8 e; V
M:
" ~1 z t: U3 Q, j, v begin# M' {7 C1 Z0 `1 D& r1 n7 B# t
if(SHORT) STATE<=G;
. Z& C: S" a) ]$ u/ r: C0 E if (LONG) STATE <=O;( U( J% p/ _; N6 G) S' [7 \) [6 D
if(END_CHAR) STATE<=DONE;
9 ]8 K5 r& T4 U. ? LETTER_REG <= STATE;+ n1 B2 T& }$ Y7 R% ` p
end
5 F6 f) I8 `/ v/ m N:$ b3 B8 ]5 E3 t$ t% }. K
begin
" G0 o$ B1 w& u7 q; E4 y% P. g( r if(SHORT) STATE<=D;
# N# q5 |* ~# ^5 }$ s if (LONG) STATE <=K;
! S0 x- B9 b& ?% {. l. L& U if(END_CHAR) STATE<=DONE;0 [# d0 u4 C" i c! x. P
LETTER_REG <= STATE;
, p7 i0 i& c8 M: J9 `6 |3 s end
- n+ p9 `* [4 s* ?# C O:; o& V% b* Q9 d5 m0 F ?& M
begin6 S. m4 E: C, t. ~! m" a+ i
if(END_CHAR) STATE<=DONE;# e+ v0 ?( s* ^# l: ^ e
LETTER_REG <= STATE;
- e* l; I0 G4 R) X* F end
! e8 K( k+ U& Y4 t# y8 y5 H0 Q- R P:: w7 W( T1 K0 s- x
begin) `; O3 {% J+ ^% L# w4 p' N5 E& F
if(END_CHAR) STATE<=DONE;
% y$ D7 t4 Z/ G7 s8 U LETTER_REG <= STATE;- H7 Y: |7 x9 D1 q* Q- A/ b0 q$ @
end9 @5 B1 b6 Z3 s6 T T7 ~
Q:
' L% B- p/ [5 p1 F$ _2 M; w begin
" Z4 j5 V( n% d: h. G& \ if(END_CHAR) STATE<=DONE;
' d* f: N8 |1 k: o* c" p LETTER_REG <= STATE;# l& m6 U2 A6 A6 f
end
* k+ n' a9 o' R% g% z8 j R:
6 W n6 L& O( A/ [9 ?* m begin$ w2 s5 D, V6 c. k# Z
if(SHORT) STATE<=L;' e" \- d( m. \' J, s( _! c& W
if(END_CHAR) STATE<=DONE;
4 _, r/ w4 [0 v LETTER_REG <= STATE;
' @- x" C, X, v4 I9 v- _ end+ g! B$ g# C* _: r l+ Q% r. L
S:
a, b5 s7 o8 `/ ` begin7 m. V" t" Q6 z4 C# W6 Y8 N% g- o. H7 ~
if(SHORT) STATE<=H;
4 c. w2 {& m, \ f( ] if (LONG) STATE <=V;
! k, q# _. h \) q if(END_CHAR) STATE<=DONE;( H; i6 `! j# ~! y5 F: i3 N4 r
LETTER_REG <= STATE;: p# }6 C9 `" V
end3 a! }* Y5 u% E% X8 k/ Y
T:" F" L u6 _2 b6 l
begin s% d+ A* i# E- `# y& ~- g2 D* b6 F
if(SHORT) STATE<=N;
: `1 H/ D* l# g if (LONG) STATE <=M;
" k$ [! m) @# b+ @- N if(END_CHAR) STATE<=DONE;
! I c, C( b5 u2 } LETTER_REG <= STATE;
% |3 x2 }# \& U# |% {: A* r% b end- ^! q2 R1 O, n
U:( v6 l( @+ K. i7 a/ L* p/ h
begin
1 v+ u9 z3 `" X$ T/ f6 W if(SHORT) STATE<=F;' D: ]" _# T" G5 z1 q
if(END_CHAR) STATE<=DONE;6 H2 a9 S& j) _ ]
LETTER_REG <= STATE;, ^/ ?1 f0 i' \# W* V0 y' G; ^
end5 B& _4 t: F i. U5 }2 e
V:7 j1 a" b8 k2 M2 Y' V
begin
& ]/ T7 L3 h- G: d$ U; l if(END_CHAR) STATE<=DONE;$ L+ Z4 m% e+ Z% H1 d2 w: t0 `
LETTER_REG <= STATE;
: Q8 P4 [$ T+ k1 O! s, U6 o end# Z9 X8 \; v" o6 K9 t
W:! Y' `/ w' K6 d$ d( J, \9 Y, I/ ~
begin2 b0 Q' N# j, x5 I2 U2 |" E; N
if(SHORT) STATE<=P;
* P" y4 ^9 R1 O, S+ `; _ if (LONG) STATE <=J;
3 Y6 A4 X9 E9 X/ A if(END_CHAR) STATE<=DONE;
; Q" M# [$ O: Q9 M& K# V LETTER_REG <= STATE;( A6 N" M* V9 y0 V4 x2 b
end
/ L3 j. d) S" u' x) l X:- n2 e/ T% q& A: G. |' t
begin- n$ Y @/ y* H$ k( ]; ]
if(END_CHAR) STATE<=DONE;
: N$ D7 N7 r5 N LETTER_REG <= STATE;
6 C2 X2 H' n6 J end
1 Q/ Q* {! ]. v! @$ B Y:
; p* t# v" } F begin, \* D H6 y7 l
if(END_CHAR) STATE<=DONE;% H0 R+ E7 W" f; k K C1 Z2 N
LETTER_REG <= STATE;
/ F' c, v$ V7 W end
, x. `' i. O7 }( t0 z/ B# X3 ^/ ` Z:" I8 }5 D: D, @
begin
0 w# ^+ p# @8 }# L% U X if(END_CHAR) STATE<=DONE;
0 j. i8 B+ J, c/ e5 T# U; E LETTER_REG <= STATE;
3 Z P8 q- S+ O$ s end# O6 b) Q0 U- ]- Z, T& f2 V* j, A
DONE: STROBE_REG <= 1'b1;
) N6 D4 u% h# _: ? default: STATE <= 5'bXXXXX;
8 V' z, W8 ]- R4 G! o& k endcase: I; |, x2 B/ E' ^! I$ I" l
end
; O8 R. t7 d6 v, R# w, m* Aend
! a$ _& | t4 a2 ~( o. A/ e D0 I# |$ Z' U
endmodule3 X- l9 A0 r' s' j, v9 Q
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