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不好意思
q7 X' D' E& v% e$ j想請問關於這個晶片中的程式碼是在敘述些什麼
. o7 V' ~, K" P% W; P4 ^+ F他有什麼功能4 {. i. J! m: ^1 h- Q6 B _
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3 g- s" X# l* p1 G' Udefine rom_size 6'd8* p) Y$ W2 V5 Z; A6 ]3 c4 K* C
0 W; N5 O+ A# t/ B6 E# fmodule CLOCK_500 (: K/ l' ^8 @. o' e6 K& ?3 _' I
CLOCK,$ Y1 Y; `2 K" C( B
CLOCK_500,7 Q# Y$ G. f- y( a
DATA,
# z0 _. ]: f+ N6 M, lEND,2 L% v/ h/ P- P. x" e- Y4 v0 z# g; p
RESET,& f/ n8 l' R% h' D0 h) I3 ]
GO,
0 m I% Q+ ^( ~2 J4 W8 JCLOCK_2
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input CLOCK;- f& {2 C m' d3 t4 f* n
input END;6 k: B: q* \& J4 u% Y8 Z1 z# M
input RESET;7 S. |; g% S" S7 p3 N- G# c
output CLOCK_500;( g5 V6 Y# s5 V, N3 |" Y
output [23:0]DATA;
% ?! U$ K8 l' Q9 f f( ?# M) aoutput GO;- k1 }# u6 b* ^/ U. n; U0 h: }
output CLOCK_2;: ~8 A6 c$ r! T6 j9 P9 N
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reg [10:0]COUNTER_500;
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wire CLOCK_500=COUNTER_500[9];' N" v+ M' A+ x: d0 r
wire CLOCK_2=COUNTER_500[1];
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! M r) U9 [4 o1 f1 u) yreg [15:0]ROM[`rom_size:0];5 u" B7 f1 L* \* [4 J0 d% r+ r
reg [15:0]DATA_A;
+ v( N2 n- ?) Z& freg [5:0]address;
. R( G$ F7 p0 p0 D) V% ?6 ywire [23:0]DATA={8'h34,DATA_A};
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wire GO =((address <= `rom_size) && (END==1))? COUNTER_500[10]:1;4 F+ z7 M- _5 u0 E9 T* E
always @(negedge RESET or posedge END) begin3 K/ q6 W+ ]- s2 s$ z3 |2 i6 n1 L
if (!RESET) address=0;
5 O/ [, A, I. F6 ^. u7 }) _else 5 r- T" Y" V( ~- c6 k7 T6 L) w5 Y
if (address <= `rom_size) address=address+1;) ^' U2 q c/ p' q) W& u$ W' j, Y
end* X% M9 i. L6 k/ S3 U+ W0 S( ]
/ A7 E0 t& n5 c( O' A7 F- zreg [7:0]vol;
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0 f" M( |" b7 ?6 J5 H8 Halways @(posedge RESET) begin
" L3 B; y/ O' n- Jvol=vol-1;end
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g& a1 ~8 ~, Y3 h( A5 [8 `always @(posedge END) begin
3 @. R$ s9 W& w- n//ROM[0]= 16'h1e00;
% |5 a8 N9 M( y: OROM[0]= 16'h0c00; //power down; x/ s* P. h2 S5 y( l
ROM[1]= 16'h0ec2; //master
; Z6 N- _9 ~* E2 k m8 U7 X1 P8 U) jROM[2]= 16'h0838; //sound select# q1 j0 Y0 E4 G" g b$ m) G: L& t
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ROM[3]= 16'h1000; //mclk
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; D. z% u, a. ~ qROM[4]= 16'h0017; //; |; p: M) F0 e0 A& J3 Z0 o4 {* t$ F0 F
ROM[5]= 16'h0217; //
9 z% |: V0 k# [0 F% c! ~6 YROM[6]= {8'h04,1'b0,vol[6:0]}; //
9 h# B) w. ~1 _2 rROM[7]= {8'h06,1'b0,vol[6:0]}; //sound vol
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! t/ H I5 D( _//ROM[4]= 16'h1e00; //reset1 `8 {3 w" ~5 P1 j& T7 a
ROM[`rom_size]= 16'h1201;//active6 j8 E. p2 t( U$ I& t. Q3 ~3 K# I
DATA_A=ROM[address];
: w! t* p. j" ~9 G+ B, J( Z$ Uend
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always @(posedge CLOCK ) begin
- ^! a8 u* T' F2 k! m/ cCOUNTER_500=COUNTER_500+1;8 V& b" f" U7 s; |* i
end4 R) Y' c6 t' `% @# C3 U) }5 U
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