想請問關於這個晶片中的程式碼是在敘述些什麼(急)

winds77322

不好意思
( T9 l7 Z/ A- }( D. T* N+ p想請問關於這個晶片中的程式碼是在敘述些什麼
他有什麼功能
0 g4 N) \/ W' K

# \2 f, |- o1 p4 Z, s# V6 q1 b) Mdefine rom_size 6'd8

module CLOCK_500 (
CLOCK,
9 \7 N1 h; v+ R- F0 @: M5 mCLOCK_500,
% D" f0 {0 l" t; K5 qDATA,
$ Y( e% ^+ M0 b) O0 a* VEND,
RESET,
GO,
" |" E; g: p/ z3 ~CLOCK_2
);
input CLOCK;
, y4 d/ {* }6 b; M: Kinput END;
0 K. H1 T: X: J# Ninput RESET;
output CLOCK_500;
$ o1 d# X0 N: Toutput [23:0]DATA;
) Q0 q- m1 J" G$ Poutput GO;
& t8 m3 ?+ ?0 L9 G4 _* Foutput CLOCK_2;
) f; D1 p' Q3 R- l8 F; @" H

6 `- g% T( X! q- y* S7 p5 h' Freg [10:0]COUNTER_500;

& @( g( c* }3 F6 j8 _) ^6 q' ~wire CLOCK_500=COUNTER_500[9];
wire CLOCK_2=COUNTER_500[1];
- O" s3 U3 f6 s' ^: O, l2 n: ]
. o8 a. Z2 {0 R5 [' L( D$ \5 N+ Lreg [15:0]ROM[`rom_size:0];
- ~0 Z$ h1 Q; z  W% T8 ]4 F2 yreg [15:0]DATA_A;
reg [5:0]address;
wire [23:0]DATA={8'h34,DATA_A};

wire GO =((address <= `rom_size) && (END==1))? COUNTER_500[10]:1;
always @(negedge RESET or posedge END) begin
) C" j0 {( S3 d$ oif (!RESET) address=0;
else
if (address <= `rom_size) address=address+1;
/ f7 l( B$ ?5 H5 w' eend

reg [7:0]vol;

always @(posedge RESET) begin
) \: X- E2 @6 G; ]9 A/ _vol=vol-1;end

0 \# Y+ d7 t( Y+ k' q4 e
+ P' K" N# @3 qalways @(posedge END) begin
//ROM[0]= 16'h1e00;
ROM[0]= 16'h0c00; //power down
1 W4 E- e) T2 P0 p8 SROM[1]= 16'h0ec2; //master
ROM[2]= 16'h0838; //sound select

; X7 [, i  g, s' U5 V+ I+ Z6 mROM[3]= 16'h1000; //mclk

ROM[4]= 16'h0017; //
, p+ _8 ?9 o, G& QROM[5]= 16'h0217; //
ROM[6]= {8'h04,1'b0,vol[6:0]}; //
3 x0 \" q* W- Q4 L# t7 hROM[7]= {8'h06,1'b0,vol[6:0]}; //sound vol
; X+ E2 J" h( T1 T+ P  t
* n" A* m2 e4 z: ]//ROM[4]= 16'h1e00; //reset
% H$ k8 c3 D) c+ S2 E5 m  _ROM[`rom_size]= 16'h1201;//active
DATA_A=ROM[address];
. V6 r+ t; r8 x/ Yend
& i9 `' b0 w  h' G
always @(posedge CLOCK ) begin
$ M9 A* }. p4 x" J( O0 QCOUNTER_500=COUNTER_500+1;
) X3 ]$ B. e$ Y# ]/ Y3 ], w# ^+ fend

endmodule

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