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play.v
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play.v
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/*
* Name: play.v
* Date: 2020-11-29
* Function: 根据按键演奏不同音符
* Input: 时钟信号clk,自动播放信号auto_sw, 按键信号key, 音域切换信号SW
* Output: 蜂鸣器信号beep, 点阵列行信号row, 点阵列列信号col_r, col_g,数码管显示信号seg
*/
module play(clk, auto_sw, key, SW, beep, row, col_r, col_g, seg);
input clk; //输入时钟1MHZ
input [6:0] key;
input [2:0] SW;
input auto_sw; //自动演奏开关
output reg beep = 0; //蜂鸣器
output [7:0]row, col_r, col_g; //点阵控制信号
output [7:0]seg; //数码管显示信号
wire [6:0] high, middle, low; //定义低中高音
reg [2:0] pitch; //定义音高
reg [6:0] tone; //定义音调
//调用分频模块
//低音1~7(分别为low[0]~low[7])
division #(3882/2) d_l1(.clk(clk),
.clk_out(low[0]));
division #(3405/2) d_l2(.clk(clk),
.clk_out(low[1]));
division #(3033/2) d_l3(.clk(clk),
.clk_out(low[2]));
division #(2863/2) d_l4(.clk(clk),
.clk_out(low[3]));
division #(2551/2) d_l5(.clk(clk),
.clk_out(low[4]));
division #(2272/2) d_l6(.clk(clk),
.clk_out(low[5]));
division #(2025/2) d_l7(.clk(clk),
.clk_out(low[6]));
//中音1~7(分别为middle[0]~middle[7])
division #(1911/2) d_m1(.clk(clk),
.clk_out(middle[0]));
division #(1702/2) d_m2(.clk(clk),
.clk_out(middle[1]));
division #(1516/2) d_m3(.clk(clk),
.clk_out(middle[2]));
division #(1431/2) d_m4(.clk(clk),
.clk_out(middle[3]));
division #(1275/2) d_m5(.clk(clk),
.clk_out(middle[4]));
division #(1136/2) d_m6(.clk(clk),
.clk_out(middle[5]));
division #(1012/2) d_m7(.clk(clk),
.clk_out(middle[6]));
//高音1~7(分别为high[0]~high[7])
division #(956/2) d_h1(.clk(clk),
.clk_out(high[0]));
division #(851/2) d_h2(.clk(clk),
.clk_out(high[1]));
division #(758/2) d_h3(.clk(clk),
.clk_out(high[2]));
division #(715/2) d_h4(.clk(clk),
.clk_out(high[3]));
division #(637/2) d_h5(.clk(clk),
.clk_out(high[4]));
division #(568/2) d_h6(.clk(clk),
.clk_out(high[5]));
division #(506/2) d_h7(.clk(clk),
.clk_out(high[6]));
//4HZ分频,用于自动演奏
division #(250000/2) d_4hz(.clk(clk),
.clk_out(clk_4HZ));
//《天空之城》选用 126 个音符,需要7位2进制数表示
reg [6:0]count; //用于轮流播放不同音符
//开始计数
always@(posedge clk_4HZ)
begin
//若按键按下,则开启自动播放计数,否则不工作
if(auto_sw)
begin
//计数器
if(count == 130)
count <= 0;
else
count <= count + 1'b1;
end
end
//开始演奏
always@(posedge clk)
begin
//手动演奏
if(!auto_sw)
begin
pitch <= SW;
tone <= key;
end
//自动演奏 天空之城
else
begin
case(count)
1: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
2: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
3: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
4: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
5: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
6: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
7: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
8: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
9: begin pitch<=3'b010; tone<=7'b000_0100; end //中音3
10: begin pitch<=3'b010; tone<=7'b000_0100; end //延音
11: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
12: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
13: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
14: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
15: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
16: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
17: begin pitch<=3'b100; tone<=7'b000_0100; end //低音3
18: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
19: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
20: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
21: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
22: begin pitch<=3'b100; tone<=7'b001_0000; end //低音5
23: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
24: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
25: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
26: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
27: begin pitch<=3'b100; tone<=7'b001_0000; end //低音5
28: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
29: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
30: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
31: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
32: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
33: begin pitch<=3'b100; tone<=7'b000_0100; end //低音3
34: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
35: begin pitch<=3'b100; tone<=7'b000_1000; end //低音4
36: begin pitch<=3'b100; tone<=7'b000_1000; end //延音
37: begin pitch<=3'b100; tone<=7'b000_1000; end //延音
38: begin pitch<=3'b100; tone<=7'b000_0100; end //低音3
39: begin pitch<=3'b100; tone<=7'b000_1000; end //低音4
40: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
41: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
42: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
43: begin pitch<=3'b100; tone<=7'b000_0100; end //低音3
44: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
45: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
46: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
47: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
48: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
49: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
50: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
51: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
52: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
53: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
54: begin pitch<=3'b100; tone<=7'b000_1000; end //低音4
55: begin pitch<=3'b100; tone<=7'b000_1000; end //延音
56: begin pitch<=3'b100; tone<=7'b000_1000; end //延音
57: begin pitch<=3'b100; tone<=7'b000_1000; end //低音4
58: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
59: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
60: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
61: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
62: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
63: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
64: begin pitch<=3'b000; tone<=7'b000_0000; end //休止符
65: begin pitch<=3'b000; tone<=7'b000_0000; end //休止符
66: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
67: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
68: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
69: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
70: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
71: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
72: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
73: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
74: begin pitch<=3'b010; tone<=7'b000_0100; end //中音3
75: begin pitch<=3'b010; tone<=7'b000_0100; end //延音
76: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
77: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
78: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
79: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
80: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
81: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
82: begin pitch<=3'b100; tone<=7'b000_0100; end //低音3
83: begin pitch<=3'b100; tone<=7'b000_0100; end //延音
84: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
85: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
86: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
87: begin pitch<=3'b100; tone<=7'b001_0000; end //低音5
88: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
89: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
90: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
91: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
92: begin pitch<=3'b100; tone<=7'b001_0000; end //低音5
93: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
94: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
95: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
96: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
97: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
98: begin pitch<=3'b100; tone<=7'b000_0100; end //低音3
99: begin pitch<=3'b100; tone<=7'b000_1000; end //低音4
100: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
101: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
102: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
103: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
104: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
105: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
106: begin pitch<=3'b010; tone<=7'b000_0010; end //中音2
107: begin pitch<=3'b010; tone<=7'b000_0010; end //延音
108: begin pitch<=3'b010; tone<=7'b000_0100; end //中音3
109: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
110: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
111: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
112: begin pitch<=3'b010; tone<=7'b000_0001; end //延音
113: begin pitch<=3'b000; tone<=7'b000_0000; end //休止符
114: begin pitch<=3'b010; tone<=7'b000_0001; end //中音1
115: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
116: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
117: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
118: begin pitch<=3'b100; tone<=7'b100_0000; end //低音7
119: begin pitch<=3'b100; tone<=7'b100_0000; end //延音
120: begin pitch<=3'b100; tone<=7'b001_0000; end //低音5
121: begin pitch<=3'b100; tone<=7'b001_0000; end //延音
122: begin pitch<=3'b100; tone<=7'b010_0000; end //低音6
123: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
124: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
125: begin pitch<=3'b100; tone<=7'b010_0000; end //延音
126: begin pitch<=3'b000; tone<=7'b000_0000; end //休止符
endcase
end
//高音部分
if(pitch == 3'b001)
begin
case(tone)
7'b000_0000:begin beep<=0; end
7'b000_0001:begin beep<=high[0]; end
7'b000_0010:begin beep<=high[1]; end
7'b000_0100:begin beep<=high[2]; end
7'b000_1000:begin beep<=high[3]; end
7'b001_0000:begin beep<=high[4]; end
7'b010_0000:begin beep<=high[5]; end
7'b100_0000:begin beep<=high[6]; end
endcase
end
//中音部分
else if(pitch == 3'b010)
begin
case(tone)
7'b000_0000:begin beep<=0; end
7'b000_0001:begin beep<=middle[0]; end
7'b000_0010:begin beep<=middle[1]; end
7'b000_0100:begin beep<=middle[2]; end
7'b000_1000:begin beep<=middle[3]; end
7'b001_0000:begin beep<=middle[4]; end
7'b010_0000:begin beep<=middle[5]; end
7'b100_0000:begin beep<=middle[6]; end
endcase
end
//低音部分
else if(pitch == 3'b100)
begin
case(tone)
7'b000_0000:begin beep<=0; end
7'b000_0001:begin beep<=low[0]; end
7'b000_0010:begin beep<=low[1]; end
7'b000_0100:begin beep<=low[2]; end
7'b000_1000:begin beep<=low[3]; end
7'b001_0000:begin beep<=low[4]; end
7'b010_0000:begin beep<=low[5]; end
7'b100_0000:begin beep<=low[6]; end
endcase
end
end
//显示点阵
show_LED sL1(.clk(clk),
.SW(pitch),
.key(tone),
.row(row),
.col_r(col_r),
.col_g(col_g));
//数码管显示
show_seg_tube(.key(tone),
.clk(clk),
.seg(seg));
endmodule