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不好意思5 r/ v9 t0 }" t
想請問關於這個晶片中的程式碼是在敘述些什麼) K w# c1 q# ]4 F( Y+ ^, q, s
他有什麼功能0 E) |/ c2 H1 D$ T8 ?" {
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: K& g9 D1 ^2 y4 N) N" i: x3 bdefine rom_size 6'd8
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module CLOCK_500 (
/ r1 I" o7 [# [) X& wCLOCK,
8 |2 w( n4 O4 T+ o# E- VCLOCK_500,
! b% E9 n# F% B, n( ^, dDATA,% ]: f1 A8 H% C! s+ Z' K
END,
9 `% v* h: d0 @/ Z5 e/ mRESET,4 M3 ~" {7 R* j9 ]! J0 `
GO,1 X' i8 O) L0 z5 @, x; s1 ^ h- `
CLOCK_27 i! G* m1 w7 x0 a( N8 d8 N
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input CLOCK;
, j ~% c6 d6 \- `: [input END;
; n2 h" p! @. w9 l$ a2 ^) {4 Sinput RESET;' E( [0 `* Q0 w9 a$ N* [4 e/ d
output CLOCK_500;+ k3 M; I7 |( j" m) J. \
output [23:0]DATA;, c& F5 l0 s- U, y: I* k$ Z
output GO;6 j+ L: ^; g4 r
output CLOCK_2;
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reg [10:0]COUNTER_500;# _0 A% U0 h9 e6 }9 J" |
k* j: l1 D, q0 [8 dwire CLOCK_500=COUNTER_500[9];
" p( c0 q5 Q ~wire CLOCK_2=COUNTER_500[1];/ p0 B M8 |" C6 j
" x$ `% B; { q$ R5 Wreg [15:0]ROM[`rom_size:0];1 \' u2 t$ u* e5 ?, j
reg [15:0]DATA_A;
( A1 X; Q9 l freg [5:0]address;5 z" `4 m* t( ]; r2 z: n2 `2 F
wire [23:0]DATA={8'h34,DATA_A};
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wire GO =((address <= `rom_size) && (END==1))? COUNTER_500[10]:1;' [% }1 D0 a2 I5 K" d/ P9 B
always @(negedge RESET or posedge END) begin" e2 G" N& L- S$ k
if (!RESET) address=0;
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if (address <= `rom_size) address=address+1;
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reg [7:0]vol;+ w z, \1 ]5 H" K6 d4 D
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always @(posedge RESET) begin
& e: Z; m1 P( i. Bvol=vol-1;end! m/ g1 O# ?9 y6 b% S
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always @(posedge END) begin! c$ P% h/ j r% ]
//ROM[0]= 16'h1e00;
0 Q- |9 O* b2 [) I7 V9 n# hROM[0]= 16'h0c00; //power down
' R6 G$ S# k; CROM[1]= 16'h0ec2; //master
8 _1 A3 [3 |9 m1 t* k. EROM[2]= 16'h0838; //sound select2 s; m# ]! N: D2 p
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ROM[3]= 16'h1000; //mclk; @" ]' }0 z6 o( X" o$ k
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ROM[4]= 16'h0017; //& }& N5 Y0 ^9 W2 }8 w
ROM[5]= 16'h0217; //
9 v' P- u6 x- r4 b- R# e! J! N( aROM[6]= {8'h04,1'b0,vol[6:0]}; //
: t1 F2 ` }! ?" Z5 [7 G; D2 J0 yROM[7]= {8'h06,1'b0,vol[6:0]}; //sound vol
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//ROM[4]= 16'h1e00; //reset
/ p0 p9 _" V/ Q( B# JROM[`rom_size]= 16'h1201;//active. v" O9 n- [* `: |/ d$ m
DATA_A=ROM[address];
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always @(posedge CLOCK ) begin$ W! p+ z6 x3 g6 U8 ?3 @5 T
COUNTER_500=COUNTER_500+1;5 K. _& O" r7 I* O+ R
end+ L) G5 X# Y% J2 O7 x; V J% F
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endmodule |
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