博主github：https://github.com/MichaelBeechan
博主CSDN：https://blog.csdn.net/u011344545
module music(clk,beep,pause,stop,switch,led); ? //定義時鐘及幾個功能變量
input clk,pause,switch,stop; ? ? ? ? ? ? ? ?//輸入變量
output beep; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?//輸出變量，即蜂鳴器發聲
output[8:1]led;
reg[8:1]led;
reg beep_r; ? ? ? ? ? ? ? ? ? ? ? //定義幾個中間變量
reg a;
reg b;
reg c;
reg[7:0]state;
reg[7:0]state1;
reg[7:0]state2;
reg[15:0]count,count_end;
reg[23:0]count1;
parameter L_5=16'd61224,L_6=16'd54545,M_1=16'd45863,M_2=16'd40864,M_3=16'd36402,M_5=16'd30612,M_6=16'd27273,H_1=16'd22956;
parameter TIME=12000000; ? ? ? ? //時鐘頻率
assign beep=beep_r;
always@(posedge pause)
begin
a=!a; //暫停
end
always@(posedge stop)
begin
b=!b; //停止
end
always@(posedge switch)
begin
c=!c; //切換
end
always@(posedge clk)
begin?if(a==1||b==1)
beep_r=1'b0;else
count<=count+1'b1;if(count==count_end)
begin
count<=16'h0;
beep<=!beep_r;
end
end
always@(posedge clk)
begin
if(count1<TIME )count=count1+1'b1;
else
begin
count1=24'd0;
if(state1==8'd147||state2==8'd60)
state=8'd0;
if(a==1&b==0)
begin
state=state;
end
if(a==0&b==0) ?
state=state+1'b1;?
if(a==0&b==1)
begin
state=8'd0;
end
if(a==1&b==1)
state=state+1'b1;
if(c==1) ? ?//曲目1
begin
state1=state;
case(state1)
8'd0,8'd1: ? ? ? ? ? ? ? ? ? ? ? ? ? count_end=L_5;
8'd2,8'd3,8'd4,8'd5,8'd6,8'd7,8'd8: ?count_end=M_1;
8'd9,8'd10: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_3;
8'd11,8'd12,8'd13,8'd14: ? ? ? ? ? ? count_end=M_2;
8'd15: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_1;
8'd16,8'd17: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_2;
8'd18,8'd19: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_3;
8'd20,8'd21,8'd22,8'd23,8'd24: ? ? ? count_end=M_1;
8'd25,8'd26: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_3;
8'd27,8'd28: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_5;
8'd29,8'd30,8'd31,8'd32,8'd33: ? ? ? count_end=M_6;
8'd34,8'd35,8'd36,8'd37,8'd38: ? ? ? count_end=M_6;
8'd39,8'd40,8'd41,8'd42: ? ? ? ? ? ? count_end=M_5;
8'd43,8'd44,8'd45: ? ? ? ? ? ? ? ? ? count_end=M_3;
8'd46,8'd47: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_1;
8'd48,8'd49,8'd50,8'd51: ? ? ? ? ? ? count_end=M_2;
8'd52: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_1;
8'd53,8'd54: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_2;
8'd55,8'd56: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_3;
8'd57,8'd58,8'd59,8'd60: ? ? ? ? ? ? count_end=M_1;
8'd61,8'd62,8'd63: ? ? ? ? ? ? ? ? ? count_end=L_6;
8'd64,8'd65: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_5;
8'd66,8'd67,8'd68,8'd69: ? ? ? ? ? ? count_end=M_1;
8'd70,8'd71,8'd72,8'd73: ? ? ? ? ? ? count_end=M_1;
8'd74,8'd75: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_6;
8'd76,8'd77,8'd78,8'd79: ? ? ? ? ? ? count_end=M_5;
8'd80,8'd81,8'd82: ? ? ? ? ? ? ? ? ? count_end=M_3;
8'd83,8'd84: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_1;
8'd85,8'd86,8'd87,8'd88: ? ? ? ? ? ? count_end=M_2;
8'd89: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_1;
8'd90,8'd91: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_2;
8'd92,8'd93: ? ? ? ? ? ? ? ? ? ? ? ? count_end=M_6;
8'd94,8'd95,8'd96,8'd97: ? ? ? ? ? ? count_end=M_5;
8'd98,8'd99,8'd100: ? ? ? ? ? ? ? ? ?count_end=M_3;
8'd101,8'd102: ? ? ? ? ? ? ? ? ? ? ? count_end=M_5;
8'd103,8'd104,8'd105,8'd106: ? ? ? ? count_end=M_6;
8'd107,8'd108,8'd109,8'd110: ? ? ? ? count_end=M_6;
8'd111,8'd112: ? ? ? ? ? ? ? ? ? ? ? count_end=H_1;
8'd113,8'd114,8'd115,8'd116: ? ? ? ? count_end=M_5;
8'd117,8'd118,8'd119: ? ? ? ? ? ? ? ?count_end=M_3;
8'd120,8'd121: ? ? ? ? ? ? ? ? ? ? ? count_end=M_1;
8'd122,8'd123,8'd124,8'd125: ? ? ? ? count_end=M_2;
8'd126: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_1;
8'd127,8'd128: ? ? ? ? ? ? ? ? ? ? ? count_end=M_2;
8'd129,8'd130: ? ? ? ? ? ? ? ? ? ? ? count_end=M_3;
8'd131,8'd132,8'd133,8'd134: ? ? ? ? count_end=M_1;
8'd135,8'd136,8'd137: ? ? ? ? ? ? ? ?count_end=L_6;
8'd138,8'd139: ? ? ? ? ? ? ? ? ? ? ? count_end=M_5;
8'd140,8'd141,8'd142,8'd143: ? ? ? ? count_end=M_1;
8'd144,8'd145,8'd146,8'd147: ? ? ? ? count_end=M_1;
default:count_end=16'hffff;
endcase
end
if(c==0) ? ? ? //曲目2
begin
state2=state;
case(state)
8'd0,8'd1,8'd2: ? ? ? ? ? ? ? ? ? ? ? count_end=M_6;
8'd3: ? ?count_end=M_5;
8'd4,8'd5: ? ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_3;
8'd6,8'd7,8'd8: ? ? ? ? ? ? ?count_end=M_5;
8'd9: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? count_end=H_1;
8'd10: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_6;
8'd11: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_5;
8'd12,8'd13,8'd14,8'd15: ? ? ? ?count_end=M_6;
8'd16,8'd17: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_3;
8'd18: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_5;
8'd19: ? ? ? ?count_end=M_6;
8'd20,8'd21: ? ? ? ?count_end=M_5;
8'd22: ? ? ? ? ? ? ?count_end=M_3;
8'd23: ? ? ? ? ? ? ? ? ? ?count_end=M_2;
8'd24: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_1;
8'd25: ? ? ? ? ? ? ?count_end=L_6;
8'd26: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_5;
8'd27: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_3;
8'd28,8'd29,8'd30,8'd31,8'd32,8'd33,8'd34:count_end=M_2;
8'd35: ? ? ? ? ? ? ?count_end=M_3;
8'd36,8'd37,8'd38: ? ? ? ? ? ? ? ? ? ?count_end=M_5;
8'd39: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_6;
8'd40,8'd41,8'd42: ? ? ? ? ? ? ?count_end=M_3;
8'd43,8'd44: ? ? ? ? ? ? ?count_end=M_2;
8'd45,8'd46,8'd47,8'd48: ? ? ? ? ? ? ?count_end=M_1;
8'd49,8'd50,8'd51: ? ? ? ? ? ? ?count_end=M_5;
8'd52: ? ? ? ? ? ? ? ? ? ?count_end=M_3;
8'd53: ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_2;
8'd54: ?count_end=M_1;
8'd55: ? ? ? ? ? ? ?count_end=L_6;
8'd56: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?count_end=M_1;
8'd57,8'd58,8'd59,8'd60: ? ? ? ? ? ? ?count_end=L_5;
default:count_end=16'hffff;
endcase
end
end
end
always @(count)
begin
case(count)
L_5:led=8'b1111_1111;
L_6:led=8'b0111_1111;
M_1:led=8'b0011_1111;
M_2:led=8'b0001_1111;
M_3:led=8'b0000_1111;
M_5:led=8'b0000_0111;
M_6:led=8'b0000_0011;
H_1:led=8'b0000_0000;
default : led=8'b0;
endcase
end
endmodule
?
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