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發表於 2021-5-26 17:25:02
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5 V' L, S1 I: v/ ~) U" ~$ E
*-------------------------------------alphabet-------------------------------------*; g; n& j/ f) T" y( T: W t
% \) H6 N/ V$ L+ a4 B
`timescale 1ns / 1ps
( ]. V% f, L3 g# u
2 R% z; H% j5 h4 Y. Bmodule alphabet(' a" |& {2 ^2 d' Q
input RESET,
+ v. X5 l& x- U% ? input Clk,
9 G# f/ i6 [1 `% h input LONG,
5 j/ z1 E. U& s7 N% j4 D input SHORT,
/ F4 ]4 u: R, r) L4 z6 I. b) p input END_CHAR,- u( \# D! T* y4 F
output [7:0] LETTER,% T4 y9 w7 s/ |: y2 O$ X: x4 |
output STROBE/ n6 {7 F: f" n/ _% [9 o3 S
);
9 V5 c( w9 S: |2 K# m5 l, G" Z6 z3 U5 p
1 w! F+ u& N7 L' e8 d& Greg[4:0] STATE, LETTER_REG;
3 C7 } J# ]6 L+ _2 w% Wreg STROBE_REG;' k$ A: |. c1 q. i
" j: P1 c2 a$ f: Z/ m s* ]
assign LETTER = LETTER_REG;
0 y |- h2 T- ^! q( i5 tassign STROBE = STROBE_REG;; o- w1 O, Y5 F6 @6 V% |8 W
' W9 r4 c$ R) n9 [# e, W! t$ z' X' D9 x" \0 B8 H8 |# ]: ]
: i* G r* f* Y; clocalparam
" T: I; h$ K2 @ INIT = 'h0,( ^3 E) N4 F! i8 f5 v
A = 'h1,
1 X6 q8 y- N1 g$ D B = 'h2," P8 v% X: H- d: |* n0 N' h* s
C = 'h3,5 K1 P$ Y1 Y* @# c/ g1 {
D = 'h4,
) r) F9 U" I5 M# S( J2 e E = 'h5,0 S1 Q- K8 P$ n9 v. u! E8 \% w
F = 'h6,
! g0 Z/ @" f3 Q" ~2 c' u G = 'h7,) t+ o& |9 B* K6 G: }5 ]4 e
H = 'h8,
$ P9 A+ `' V/ |7 P6 F4 c I = 'h9,) S+ f5 V' y2 {" j. f( W) B5 Y
J = 'hA,6 p7 Y) E" u0 G
K = 'hB,+ |# ?: o6 C' p: {$ r
L = 'hC,' D R0 p1 v! m' u/ D2 r) x
M = 'hD,
$ z. q4 L( G f; }# X! ?& { T( U! q N = 'hE,
& D9 \+ D" P9 H2 o$ v/ h3 R O = 'hF,! {2 E- A3 _; r( ^, N" }$ K F
P = 'h10,
; K3 H4 T% j" L9 Y; B$ a Q = 'h11,! L/ u* S7 [! S9 ^$ _4 g1 D% h* y
R = 'h12,2 R9 v: J5 u, [0 h* E' Q+ q
S = 'h13,
4 j+ r( S- o+ ~# M9 A! q5 @ } T = 'h14,5 F5 a0 a5 ~8 R1 y
U = 'h15,
" _& o4 ~. {3 ^$ W, O! m V = 'h16,/ P6 j6 }, G/ r: \
W = 'h17,
4 g: m) I1 |7 B2 ] X = 'h18,
2 y1 V4 C Q6 [3 g* w Y = 'h19,
+ C6 m% q( E8 }, Z, r, U Z = 'h1A,4 t. J; y# L! |/ X
DONE = 'h1B;
. n) a5 U( M. t; D% ]. F4 s% e4 e& X" u p* H+ v
6 n% @0 [1 `# {. {9 r9 t; W5 T
always @ (posedge Clk)
! r3 w& Y, x" Vbegin
* b3 y0 q3 v: m1 G) W0 T if(RESET)
2 m/ R( `; B0 G$ @& W begin3 v, f% \" o- l6 y# K
STATE <= INIT; I% |0 |; Y) K; s
STROBE_REG <= 1'b0;; o" G" e1 k: L! y
LETTER_REG <= 5'b00000;
e$ a4 H6 `0 `$ \& P+ u end, o" g6 ]! U$ ]$ D+ m
else; K+ `! O2 k0 V, j1 A+ m3 k- j3 v8 F
begin
5 Q; E$ `6 e6 t9 H case(STATE)
; o2 ?2 @1 R* g Q/ B# c$ Y. R7 k INIT:/ g. E: e% l/ l
begin1 r. `5 p) Q/ q* i
STROBE_REG <= 0;- O6 t4 L5 f( c& W
if(SHORT) STATE<=E;
0 A0 N/ q- H: p9 z, S; h% c if (LONG) STATE <=T;2 \4 h& F3 Y) U/ n/ Z( L5 P
end5 b! }* R' Y' P/ s1 m( s1 K
A:
. p! T. a j, M begin
! g2 O4 y, m: j/ U" c3 J" Z if(SHORT) STATE<=R;- H" J( V+ O$ U4 T s) K, k
if (LONG) STATE <=W;- d+ ~' n4 P4 l# N5 a/ ]; P1 `
if(END_CHAR) STATE<=DONE;
6 M) w, t; J4 i3 D3 K0 L9 x2 ] LETTER_REG <= STATE;, \4 ^- p. D4 B3 o( k
end
8 H1 O0 D; W$ X% v7 g! n B:
! q: Z9 b ^4 [; J begin% G# S1 M# ~! b! p, C/ P( b
if(END_CHAR) STATE<=DONE;
+ D- q8 i( G' M+ E- o9 s* V; h LETTER_REG <= STATE;
/ U) @; D: l2 u- [3 N. t' F end4 n; ]7 A) R% N5 T5 I% L2 m) S; N
C:4 X/ ~- H' ? Z7 J( h
begin
" O- O0 }* c1 d+ F if(END_CHAR) STATE<=DONE; J4 w0 W% P# R; j- y" j
LETTER_REG <= STATE;' v: n2 u, c) f: M
end
' P) j/ c; c F+ R0 M+ ?1 @" Z D:
0 a! r2 E% j* x. P# B begin3 j* p _* H/ {8 ^- o# ]. |
if(SHORT) STATE<=B;6 W ~5 D- |$ F; J% u
if (LONG) STATE <=X;3 G: C" ^" S `6 c* h1 _5 F
if(END_CHAR) STATE<=DONE;- h5 N$ M6 \, k# Z
LETTER_REG <= STATE;
6 `8 x; M; W+ ^& \4 Z end5 a# K- ], o! f2 k% }$ [0 `
E:5 A2 k, K( \# ^) T; c* `6 c
begin% |: Z* b1 r1 Q
if(SHORT) STATE<=I;
- R+ {# m7 d: q if (LONG) STATE <=A;: g) _0 `( ]. E5 o
if(END_CHAR) STATE<=DONE;
6 O9 E, j, D/ r* y4 W1 F+ _% V LETTER_REG <= STATE;
. O0 f& h% D/ H1 v) f. T2 q5 Z5 @ end
$ B# B0 j. K* Z5 G F:" M& T* m4 D/ h+ m$ W: h
begin& ^ t: p2 V, m* M9 h+ i, T
if(END_CHAR) STATE<=DONE;
r. t. e3 ~- j' ? LETTER_REG <= STATE;+ [% w2 H* [) y! |. |( |
end
- z4 \4 B, I0 E6 F# G) _& x# B4 J0 n G:; F9 e! [9 }* V/ w) p. Y
begin7 r' B8 F$ V) |
if(SHORT) STATE<=Z; J& {9 z/ ^$ Y6 ~! d
if (LONG) STATE <=Q;
7 ^4 [& a- r+ d/ B& b# R( O if(END_CHAR) STATE<=DONE;5 c; y' G: w. e( v$ _: E% M
LETTER_REG <= STATE;8 h9 i* S5 A% z& }
end/ a, N0 x" U6 l' K* s1 x
H:
* i, Y4 a& A H0 e2 a- \8 e begin
0 F5 m+ o4 R( j& B% x( H- v if(END_CHAR) STATE<=DONE;
0 \ i9 y# Z6 ?( A) z LETTER_REG <= STATE;
9 T d- A4 D( p* b, j end
* h# H3 I- {* s# ? I:
- n6 c! k$ y" x' L6 D begin# Z) V7 \; N8 P* z" i- g: z, v
if(SHORT) STATE<=S;
7 S( w& m6 z6 g0 V* g' t if (LONG) STATE <=U;
@, `/ @! r c- g) O if(END_CHAR) STATE<=DONE;8 B+ u' ~3 D5 m
LETTER_REG <= STATE;, [3 S6 L6 R: `" S: z. ~/ ]4 }
end
# ]) ?- z. z- K0 X# ~* l J:
+ o5 e: J4 L& Y: Z$ s7 [8 } begin$ L, w3 l* Y4 V
if(END_CHAR) STATE<=DONE;
! f/ Y! M: F s. m; Q& U) E* P LETTER_REG <= STATE; N. I5 n W/ E
end
& y( B, R7 p2 q7 B8 U+ J; e( L5 m K:
9 A( J2 ^' |, Z9 \$ b begin, x& P. {' F* c4 N% }
if(SHORT) STATE<=C;
# B% d" C+ d6 c1 X t if (LONG) STATE <=Y;& J) I0 s [: R; t
if(END_CHAR) STATE<=DONE;/ J) z/ h- q H1 N) S/ z' O" v9 I& ?
LETTER_REG <= STATE;( b _/ b( M6 I) w
end
: T& S1 D4 Z6 o, ~& p* E- D, D L:
8 R/ I' p' P( ?8 [$ J' ]5 P begin! M, X# e0 _ D/ }4 e1 R, }
if(END_CHAR) STATE<=DONE;
6 k2 T; v9 P9 l7 X' d/ L! _% X6 h LETTER_REG <= STATE;9 w, N" v9 J& a! i) U
end
9 L9 u9 h5 s! J! t ]5 T; v M:4 b4 \: @% ~1 I8 K; t
begin
% a$ U+ T0 ]( G if(SHORT) STATE<=G;
, T& q) w8 ]/ t. N* \# Q7 X3 V if (LONG) STATE <=O;
( A$ A) w6 z1 t& p if(END_CHAR) STATE<=DONE;
7 G3 ]/ c; t. u3 B. S6 A1 G5 {; W LETTER_REG <= STATE;8 _ X. p8 J* V2 e" K0 k
end0 g+ b" @ H2 H2 m6 Z
N:1 k1 V" B1 L7 m5 L% H! b) K6 S! p) t
begin
' c1 _' Z' n; o* h/ B! e8 [. K- l if(SHORT) STATE<=D; \4 k* ?- g# ]* O) s
if (LONG) STATE <=K;
' ~& B' f1 r# u6 @4 s' U1 L: p if(END_CHAR) STATE<=DONE;
+ I) L6 P( a; R v3 b) i1 Z LETTER_REG <= STATE;) c6 G& p) c; j$ k
end
8 A$ e; b5 |& y) m, O4 L O:
9 K" [1 |, V% K& y; W; o8 p N0 n begin$ D. o/ w) _) J H
if(END_CHAR) STATE<=DONE;3 b& F7 P0 D+ L+ V# H& |6 p
LETTER_REG <= STATE;7 t$ X& N X% i0 x
end4 A5 }" k& G; h9 H
P: S! j1 p9 D$ [6 ], Y# O7 ]
begin- O/ V7 p8 i V
if(END_CHAR) STATE<=DONE;. z9 W2 m( B( n$ x
LETTER_REG <= STATE;# J: P- [6 V- t- T, U
end
7 A' A( J- {( K1 i Q:& V" L7 i( B' B4 d/ h! }- Q
begin* p. [& k9 z; R. T; m
if(END_CHAR) STATE<=DONE;. J% O( N" K( `' C
LETTER_REG <= STATE;
% _4 v; l# ~- w' j' |4 L$ A a end! W7 U# M3 Z; d( D N" ^8 K3 |" K! {
R:1 k) j2 ]9 A5 P
begin
0 l, |' Y) w- f6 H/ z; F9 x2 d+ @ if(SHORT) STATE<=L;
7 Z3 i4 G2 v4 t' d6 Q0 m2 f: ~ if(END_CHAR) STATE<=DONE;
- K' u0 q3 b6 `1 \; i LETTER_REG <= STATE;0 H. d$ g( Y5 @) n2 j% D" u
end& G* y$ e) g" E8 q3 c
S:+ N( Q& ]2 j/ p; e0 a
begin9 ~9 v H- y8 `. Z1 t- S, L9 m
if(SHORT) STATE<=H;& a* P8 M1 i! I
if (LONG) STATE <=V;, `- L8 K/ K! j- o% m+ ]. A- F* @
if(END_CHAR) STATE<=DONE;
4 C7 e' X4 ^( q1 T( _; w8 u5 W LETTER_REG <= STATE;' }% m. A z5 X9 c
end. L' @4 |. k! @' G* q4 v4 {
T:
( S3 L9 b: p5 h6 m& m! G begin
: M, R, }" B6 v3 m6 |1 I if(SHORT) STATE<=N;
2 a( C% a, D: D if (LONG) STATE <=M;
5 t6 y7 _: r | if(END_CHAR) STATE<=DONE;
" Q; B% D1 H+ z$ B9 W/ S LETTER_REG <= STATE;1 q8 D" W" ?( c9 \( t
end1 V( c2 j4 n( N2 A" Y$ [3 Z
U:
# N/ W' j" Y: t0 ?" r begin
, T+ R0 m) k* W2 U( O7 E9 [9 \- i if(SHORT) STATE<=F;
+ W. l" a& P7 t( T; z. ] if(END_CHAR) STATE<=DONE; w( `8 I/ A" n; M; s( r% D6 f
LETTER_REG <= STATE;! v2 O$ r" H) C1 F e. u
end0 J1 R( j% x( |4 b6 }
V:' o- D C8 g, c& M1 `/ u, P
begin: D5 o& D1 L s t9 E' C
if(END_CHAR) STATE<=DONE;
1 R/ Z! @, B9 q+ G! _6 d$ i. I LETTER_REG <= STATE;
4 U' I- z8 h! G. f end1 e) V, m2 d2 J+ X
W:
* | _& I/ U' o8 V8 c) W- B! ]: K begin1 F0 \. E% K' V" U9 \
if(SHORT) STATE<=P;
$ G* V: K3 b/ f' n5 k" E0 r) r0 m4 T& H if (LONG) STATE <=J;
U4 a T/ z$ j5 p if(END_CHAR) STATE<=DONE;, G3 M& d+ c: o( f$ ?) ^
LETTER_REG <= STATE;
4 v$ F& P- P+ ~% L7 w4 t/ `9 X0 ^ end. u3 W! C9 U o8 |2 M) D
X:
( ]5 S& k3 }- G: L) Z, E: m begin3 P; J0 r" k. A* ]8 Z% j. y
if(END_CHAR) STATE<=DONE;
- A6 p& j8 Z+ |9 E' A5 U% _ LETTER_REG <= STATE;1 _( a4 |' _+ o c' e+ A' d- t
end+ I0 j% |- [' h( x. q0 R+ l
Y:
" c5 G8 R( M9 b% N" _* ?& Y* M+ f begin
1 t9 H- O7 R/ E V if(END_CHAR) STATE<=DONE;
+ H" B3 T+ s) F: [$ u' C LETTER_REG <= STATE;* i- _1 G! _" Q( g4 @% v7 g9 K
end
8 P2 W9 a5 s/ ^: d% {( p! }( K1 b Z:9 \& ~! a5 p0 x: k
begin9 R) L- }9 A( ~6 R( \# w
if(END_CHAR) STATE<=DONE;
0 [7 o3 g2 B& f3 H8 L' ], n LETTER_REG <= STATE;
* M0 e$ x( m+ g3 M6 _+ h8 s# D end. J* I3 r( Y3 \% d# S+ Q( p% n
DONE: STROBE_REG <= 1'b1;
" x5 W. g- _. B+ Q' h" W/ z default: STATE <= 5'bXXXXX;
3 I2 j" C3 Y2 c! j7 { endcase* {8 s2 J8 J S$ @ T
end) E; F) W2 {7 c. s& m: d
end
$ @, d2 z1 i& {1 @& `4 j7 a1 C0 {. q; C0 j" e2 p
endmodule
3 v5 M) ]' o @- ^ |
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