本文主要是介绍基于FPGA的售货机，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
文章目录
- 一、要求
- 二、效果
- 三、设计思路
- 1.按键
- 2.数码管
- 3.LED
- 4.蜂鸣器
- 四、程序流程图
- 五、项目RTL视图
- 六、代码实现
- 1.按键消抖
- 2.售货机
- 3.LED
- 4.数码管
- 5.音乐播放
- 6.蜂鸣器
- 7.顶层模块
- 七、仿真
一、要求
- 默认只接收0.5元、1元投币。
- 货物为2.5元。
- 满足2.5元后自动出货，出货动作用4个LED同时闪烁(闪烁2s）表示。
- 满足3元之后，自动出货并找零，动作用4个LED做流水灯表示(同样闪烁2s)。
二、效果
- 默认只接收0.5元、1元投币。
- 货物有4种可以选择，价格分别为0.5，1.5，2.4，3元。
- 满足当前选择的商品价格后自动出货，自动出货并找零，出货动作用4个LED做跑马灯(持续2s)表示。
- 显示当前投币的总额、当前选择的商品的价格以及找零的数目。
- 复位时播放音乐并显示彩灯。
- 投币不足目标价格时可以取消，动作用灯闪烁表示(2s)。
三、设计思路
1.按键
2.数码管
数码管6位，从左往右，依次是两位的投币输入金额，两位的商品价格
以及两位的找零金额。初始显示1位，两位，1位。
位选总共六种显示状态，段选10种状态。
3.LED
4.蜂鸣器
四、程序流程图
五、项目RTL视图
六、代码实现
1.按键消抖
module key_drive (input wire clk,input wire rst_n,input wire [2:0] key, //按键output reg [19:0] value //输出到数码管显示的值
);parameter MAX_VALUE = 20'd1024; //最大显示数字always @(posedge clk or negedge rst_n) beginif(!rst_n) beginvalue <= 20'd0;endelse if (value >= MAX_VALUE) beginvalue <= 20'd0;end// 根据按下的键进行对应的操作else beginif(key[0]) beginvalue <= 2;endelse if (key[1]) beginvalue <= 3;endelse if (key[2]) beginvalue <= 4;endelse beginvalue <= value;endend
end
endmodule
2.售货机
module machine_drive(input wire clk , //时钟信号input wire rst_n , //复位信号input wire [2:0] key , //3个按键 KEY4-key[2]:1元 KEY3-key[1]:0.5元 KEY2-key[0]：更换商品价格output reg [3:0] led_value , //对应led显示效果的类型output reg [6:0] price_put , //用户投入的钱output reg [6:0] price_need , //商品价格output reg [6:0] price_out //找零
);//四种商品对应价格
parameter P1 = 7'd5;
parameter P2 = 7'd15;
parameter P3 = 7'd24;
parameter P4 = 7'd30;parameter MAX_TIME = 28'd100_000_000; //退款过程持续时间reg [1 :0] price_tmp ; //当前商品价格
reg [27:0] cnt_time ; //用作退款过程计时
reg flag_can_operation ; //可以继续投币和切换商品
reg flag_is_retreat_end ; //结算完毕wire flag_is_retreat ; //开始结算
wire flag_price_is_enough ; //可以买下商品
reg [6:0] price_put_last ; //结算前的投币数//结算倒计时模块
always @(posedge clk,negedge rst_n) beginif(!rst_n)begincnt_time <= 28'd0; //初始设置计数器为0flag_can_operation <= 1'b1 ;//设置KEY键可操作flag_is_retreat_end <= 1'b0;//设置结算完毕标志为0endelse beginif (flag_is_retreat) begin //开始结算cnt_time <= MAX_TIME; //计数器设置最大值flag_can_operation <= 1'b0 ;//当前处于结算状态，设置KEY键不可用flag_is_retreat_end <= 1'b0;//设置结算未完毕endelse if(cnt_time > 28'd1) begin //计数器数值大于1cnt_time <= cnt_time - 28'd1;//倒计时flag_can_operation <= 1'b0; //当前处于结算状态，设置KEY键不可操作flag_is_retreat_end <= 1'b0; //设置结算未完毕endelse if(cnt_time == 28'd1) begin//计数器倒计时数到1cnt_time <= 28'd0; //计数器清零flag_can_operation <= 1'b1; //结算完毕，设置KEY键可操作flag_is_retreat_end <= 1'b1; //设置结算完毕endelse begincnt_time <= cnt_time;flag_can_operation <= flag_can_operation;flag_is_retreat_end <= 1'b0;endendend//按下KEY2-key[0]切换商品价格
always@(posedge clk,negedge rst_n)beginif(!rst_n)beginprice_tmp<= 2'd0; //初始设置商品价格为1号商品endelse if(flag_can_operation) begin//当前按键可操作// 当没有投币的时候按下 KEY2-key[0] 为切换商品 if(key[0] && ! price_put) beginprice_tmp <= (price_tmp + 2'd1) % 4;//%操作，循环切换endelse beginprice_tmp <= price_tmp; //没有按下切换按键，当前商品价格保持endendelse beginprice_tmp <= price_tmp; end
end// 切换商品价格
always@(posedge clk,negedge rst_n)beginif(!rst_n)price_need<=P1;elsecase(price_tmp)2'b00 : price_need <= P1;2'b01 : price_need <= P2;2'b10 : price_need <= P3;2'b11 : price_need <= P4;default:price_need <= P1;endcase
end//切换商品价格时led灯光效果
always @(posedge clk,negedge rst_n) beginif(!rst_n)led_value <= 4'd1;//退款的时候判断是 补差价 或者 全额退款//补差价为流水灯效果//全额退款为闪烁效果 else if(flag_is_retreat)begin//开始结算led_value <= price_put_last >= price_need ? 4'd6 : 4'd7 ;//当前投币数大于等于商品价格，LED状态为6，否则状态为7end//正常操作状态根据当前选择商品亮起对应商品ledelse if(flag_can_operation)begincase(price_tmp)2'b00 : led_value <= 4'd2;2'b01 : led_value <= 4'd3;2'b10 : led_value <= 4'd4;2'b11 : led_value <= 4'd5;default:led_value <= 4'd2;endcaseendelse led_value <= led_value;
end//用户通过按键进行投币
always@(posedge clk,negedge rst_n)beginif(!rst_n)beginprice_put_last<=7'd0;//累计投币数初始化为0endelse if(flag_can_operation) begin//当前按键可操作//超过100 或者 if(price_put_last>=7'd100 || flag_is_retreat) begin//当前投币大于10超过可显示数字或开始结算，投币清零price_put_last<=7'd0;end/*按下 key[2] 投币 + 10按下 key[1] 投币 + 5*/ else beginif(key[2])//KEY4-key[2]投币1元price_put_last<=price_put_last+7'd10;else if(key[1])//KEY3-key[1]投币0.5元price_put_last<=price_put_last+7'd5;else price_put_last<=price_put_last;endendelse beginprice_put<=price_put;end
end//投币数码显示保持2s
always @(posedge clk,negedge rst_n) beginif(!rst_n)beginprice_put<=7'd0;endelse if(!flag_can_operation)//按键不可操作price_put <= price_put;//输出投币保持else price_put <= price_put_last;//否则将当前投币值赋值给输出投币寄存器
end// 输出找零
always @(posedge clk,negedge rst_n) beginif(!rst_n)beginprice_out <= 7'd0;//初始找零0元end//结算完毕,归零else if(flag_is_retreat_end) beginprice_out =7'd0 ;end //当退款标志到来,计算退款金额为 补差价 或者 全额退款else if(flag_is_retreat) begin//开始结算price_out <= price_put_last >= price_need ? price_put_last - price_need : price_put_last ;//当前投币大于商品价格则找零差值，否则找零为0endelse beginprice_out <= price_out;end
end//当投币可以买下商品
assign flag_price_is_enough = price_put_last >= price_need;//当前投币数大于等于商品价格，投币足够标志置1
//为了保证在结算前得到最后一次投币数量
// assign price_put_last = price_put;
// 当币足够 或者 在投币过程选择切换商品则开始退款
assign flag_is_retreat = flag_price_is_enough || (price_put && key[0]);//投币足够或退款，结算处理标志置1
endmodule3.LED
module led_drive (input wire clk ,//时钟信号input wire rst_n,//复位信号input wire [3:0] value,//LED显示状态output reg [3:0] led //4个LED输出
);
/*value 效果0 全灭1 全亮2 只亮led[0]3 只亮led[1]4 只亮led[2]5 只亮led[3]6 流水灯7 闪烁
*/
parameter MAX_TIME_RUNNING = 28'd4_000_000; //流水灯频率0.08s
parameter MAX_TIME_FLASH = 28'd10_000_000; //闪烁频率0.2sreg [27:0] cnt_time_running ; //流水灯计时器
reg [27:0] cnt_time_flash; //闪烁灯计时器reg [7:0] led_running; //流水灯状态寄存器
reg [3:0] led_flash; //闪烁灯状态寄存器//流水灯计数器0.08s
always @(posedge clk or negedge rst_n) beginif(!rst_n)cnt_time_running <=28'd1;else if(value == 4'd6) beginif(cnt_time_running == MAX_TIME_RUNNING)cnt_time_running <=28'd1;elsecnt_time_running <= cnt_time_running+28'd1;endelse cnt_time_running <= 28'd1;
end//闪烁灯计数器0.2s
always @(posedge clk or negedge rst_n) beginif(!rst_n)cnt_time_flash <=28'd1;else if (value == 4'd7) beginif(cnt_time_flash == MAX_TIME_FLASH )cnt_time_flash <=28'd1;elsecnt_time_flash <= cnt_time_flash+28'd1;endelse cnt_time_flash <= 28'd1;
end//流水灯状态切换 间隔0.08s
always @(posedge clk or negedge rst_n) beginif(!rst_n)led_running <= 8'b00001111;else if(cnt_time_running == MAX_TIME_RUNNING)beginled_running <= {led_running[0],led_running[7:1]};endelse led_running <=led_running;end//闪烁状态切换 间隔0.2s
always @(posedge clk or negedge rst_n) beginif(!rst_n)led_flash <= 4'b0000;else if(cnt_time_flash == MAX_TIME_FLASH)beginled_flash <= ~led_flash;endelse led_flash <=led_flash;end//根据value值输出对应灯效果
always @(*) begincase(value)4'd0: beginled = 4'b0000;//默认状态LED全灭end4'd1:beginled = 4'b1111;//end4'd2:beginled = 4'b0001;//选择第一种商品end4'd3:beginled = 4'b0010;//选择第二种商品end4'd4:beginled = 4'b0100;//选择第三种商品end4'd5:beginled = 4'b1000;//选择第四种商品end4'd6: beginled = led_running[3:0];//购买成功找零不找零，流水灯end4'd7:beginled = led_flash;//取消订单，闪烁enddefault : led = 4'b0000;endcase
end
endmodule
4.数码管
位选
module sel_drive(input wire clk ,input wire rst_n ,input wire [6:0] price_put , //投入的钱input wire [6:0] price_need , //商品的价格input wire [6:0] price_out , //找零的钱output reg [5:0] sel //数码管位选
);
//状态
localparam state0 = 3'd0;
localparam state1 = 3'd1;
localparam state2 = 3'd2;
localparam state3 = 3'd3;
localparam state4 = 3'd4;
localparam state5 = 3'd5;parameter MAX_NUM = 1_000;//计数器最大计数值 刷新频率20微秒reg [2 :0] current_state;
reg [2 :0] next_state;
reg [20:0] cnt; //时钟分频计数器
reg flag;//计数器
always @(posedge clk or negedge rst_n)beginif(!rst_n)beginflag <= 1'b0;cnt <= 0;endelse if(cnt == 0)begin//一轮计数完毕flag <= 1'b1;cnt <= 1;endelse begin flag <= 1'b0;cnt <= (cnt + 1'b1) % MAX_NUM;//循环+1end
end
// 状态跳转
always @(posedge clk or negedge rst_n) beginif(!rst_n) begincurrent_state <= state0;endelse if(flag) begincurrent_state <= next_state;endelse current_state <= current_state;
end//状态判断
always @(*) beginif(!rst_n) beginnext_state <= state0;endelse if(flag) begincase(current_state)state0: beginnext_state <= state1;endstate1: beginnext_state <= state2;endstate2: beginnext_state <= state3;endstate3: beginnext_state <= state4;endstate4: beginnext_state <= state5;endstate5: beginnext_state <= state0;enddefault:beginnext_state <= state0;endendcaseendelse beginnext_state <= next_state;end
end//根据value的值确定需要亮几位
always@(current_state) begincase (current_state)state0: begin //右第一位数码管显示sel <= 6'b011111;endstate1: begin //右第二位数码管显示if (price_out >=1) beginsel <= 6'b101111;endelse beginsel <= 6'b111111;endendstate2: begin //右第三位数码管显示if (price_need >=0) beginsel <= 6'b110111;endelse beginsel <= 6'b111111;endendstate3: begin //右第四位数码管显示if (price_need >=1) beginsel <= 6'b111011;endelse beginsel <= 6'b111111;endendstate4: begin //右第五位数码管显示if (price_put >=0) beginsel <= 6'b111101;endelse beginsel <= 6'b111111;endendstate5: begin //右第五位数码管显示if (price_put >=1) beginsel <= 6'b111110;endelse beginsel <= 6'b111111;endenddefault:beginsel <= 6'b111111;endendcase
end
endmodule
段选
module seg_drive(input wire clk ,input wire rst_n , //复位input wire [5:0] sel , //数码管位选input wire [6:0] price_put , //投入的钱input wire [6:0] price_need , //商品的价格input wire [6:0] price_out , //找零的钱output reg [7:0] seg //数码管段选);reg [3:0] num;
always@(*) begincase(sel)//投入的钱6'b111_110: num = (price_put % 100) / 10; //十位 6'b111_101: num = price_put % 10; //个位//需要的钱6'b111_011: num = (price_need % 100) / 10; //十位6'b110_111: num = price_need % 10; //个位//找回的钱6'b101_111: num = (price_out % 100) / 10; //十位6'b011_111: num = price_out % 10; //个位default:num = 4'd0;endcase
endalways @ (*) begin//需要显示小数点if(!sel[1] || !sel[3] || !sel[5]) begincase(num)4'd0: seg = 8'b1100_0000; //匹配到后参考共阳极真值表4'd1: seg = 8'b1111_1001;4'd2: seg = 8'b1010_0100;4'd3: seg = 8'b1011_0000;4'd4: seg = 8'b1001_1001;4'd5: seg = 8'b1001_0010;4'd6: seg = 8'b1000_0010;4'd7: seg = 8'b1111_1000;4'd8: seg = 8'b1000_0000;4'd9: seg = 8'b1001_0000;default : seg = 8'b1100_0000;endcaseendelse begincase(num)4'd0: seg = 8'b0100_0000; //匹配到后参考共阳极真值表4'd1: seg = 8'b0111_1001;4'd2: seg = 8'b0010_0100;4'd3: seg = 8'b0011_0000;4'd4: seg = 8'b0001_1001;4'd5: seg = 8'b0001_0010;4'd6: seg = 8'b0000_0010;4'd7: seg = 8'b0111_1000;4'd8: seg = 8'b0000_0000;4'd9: seg = 8'b0001_0000;default : seg = 8'b0100_0000;endcaseendend
endmodule
5.音乐播放
module freq_select
(input wire clk,input wire rst_n,output reg status, //蜂鸣器1/0output reg [2:0] spec_flag//音符);parameter NOTE_NUM=6'd50; //50个音符
//中
parameter DO = 20'd95600 ;//1
parameter RE = 20'd83150 ;//2
parameter MI = 20'd75850 ;//3
parameter FA = 20'd71600 ;//4
parameter SO = 20'd63750 ;//5
parameter LA = 20'd56800 ;//6
parameter XI = 20'd50600 ;//7
//高
parameter HDO = 16'd47750 ;//1
parameter HRE = 16'd42250 ;//2
parameter HMI = 16'd37900 ;//3
parameter HFA = 16'd37550 ;//4
parameter HSO = 16'd31850 ;//5
parameter HLA = 16'd28400 ;//6
parameter HXI = 16'd25400 ;//7
//低
parameter LDO = 20'd190800 ;//1
parameter LRE = 20'd170050 ;//2
parameter LMI = 20'd151500 ;//3
parameter LFA = 20'd143250 ;//4
parameter LSO = 20'd127550 ;//5
parameter LLA = 20'd113600 ;//6
parameter LXI = 20'd101200 ;//7reg [25:0] inte_cnt; //300ms,间隔
reg [19:0] note_cnt; //音符持续时间计时
reg [5:0] spec_cnt; //音谱个数计数
reg [19:0] spec_data; //音符频率
reg [25:0] continue_time; //持续时间
reg [27:0] blank_time; //空白时间 wire[18:0] duty_data; //占空比数据
wire end_note; //音符结束时间
wire end_spectrum; //音谱结束时间//音符之间间隔时间计数
always@(posedge clk,negedge rst_n)beginif(!rst_n)inte_cnt<=26'b0;else if(inte_cnt==continue_time+blank_time)inte_cnt<=26'b0;else begininte_cnt<=inte_cnt+1'b1;end
end//单个音符频率计数
always@(posedge clk or negedge rst_n)beginif(!rst_n)beginnote_cnt <= 20'd0;//20end else if(end_note)beginnote_cnt <= 20'd0;end else beginnote_cnt <= note_cnt + 1'd1;end
end//音符数计时
always@(posedge clk or negedge rst_n)beginif(!rst_n)beginspec_cnt <= 6'd0;end else if(end_spectrum)beginspec_cnt <= 6'd0;end else if(inte_cnt == continue_time+blank_time)beginspec_cnt <= spec_cnt + 1'd1;end else beginspec_cnt <= spec_cnt;end
end always@(posedge clk or negedge rst_n)begincase(spec_cnt)6'd0: continue_time<=26'd10_000_000;//你爱我6'd1: continue_time<=26'd_000_000;6'd2: continue_time<=26'd10_000_000; 6'd3: continue_time<=26'd20_000_000;6'd4: continue_time<=26'd10_000_000;//我爱你蜜雪 6'd5: continue_time<=26'd10_000_000; 6'd6: continue_time<=26'd20_000_000; 6'd7: continue_time<=26'd10_000_000;6'd8: continue_time<=26'd10_000_000;6'd9: continue_time<=26'd10_000_000;//冰城甜蜜 6'd10:continue_time<=26'd15_000_000;6'd11:continue_time<=26'd10_000_000;6'd12:continue_time<=26'd9_000_000;6'd13:continue_time<=26'd25_000_000;//蜜6'd14:continue_time<=26'd10_000_000;//你爱我6'd15:continue_time<=26'd10_000_000;6'd16:continue_time<=26'd10_000_000;6'd17:continue_time<=26'd20_000_000;6'd18:continue_time<=26'd10_000_000;//我爱你蜜雪6'd19:continue_time<=26'd10_000_000;6'd20:continue_time<=26'd20_000_000;6'd21:continue_time<=26'd10_000_000;6'd22:continue_time<=26'd10_000_000;6'd23:continue_time<=26'd10_000_000;//冰城甜蜜6'd24:continue_time<=26'd15_000_000;6'd25:continue_time<=26'd10_000_000;6'd26:continue_time<=26'd9_000_000;6'd27:continue_time<=26'd25_000_000;//蜜6'd28:continue_time<=26'd20_000_000;//你爱6'd29:continue_time<=26'd20_000_000;6'd30:continue_time<=26'd20_000_000;//我呀6'd31:continue_time<=26'd10_000_000;6'd32:continue_time<=26'd10_000_000;6'd33:continue_time<=26'd20_000_000;//我爱6'd34:continue_time<=26'd10_000_000;6'd35:continue_time<=26'd10_000_000;6'd36:continue_time<=26'd50_000_000;//你6'd37:continue_time<=26'd10_000_000;//你爱我6'd38:continue_time<=26'd10_000_000;6'd39:continue_time<=26'd10_000_000; 6'd40:continue_time<=26'd20_000_000;6'd41:continue_time<=26'd10_000_000;//我爱你蜜雪 6'd42:continue_time<=26'd10_000_000; 6'd43:continue_time<=26'd20_000_000; 6'd44:continue_time<=26'd10_000_000;6'd45:continue_time<=26'd10_000_000;6'd46:continue_time<=26'd10_000_000;//冰城甜蜜 6'd47:continue_time<=26'd25_000_000;6'd48:continue_time<=26'd10_000_000;6'd49:continue_time<=26'd9_000_000;6'd50:continue_time<=26'd25_000_000;//蜜default: continue_time<=26'd24_000_000;endcase
end
//空白时间
always@(spec_cnt)begincase(spec_cnt)6'd0: blank_time<=26'd2_000_000;//你爱我6'd1: blank_time<=26'd2_000_000;6'd2: blank_time<=26'd2_000_000; 6'd3: blank_time<=26'd5_000_000;6'd4: blank_time<=26'd2_000_000; //我爱你蜜雪 6'd5: blank_time<=26'd2_000_000; 6'd6: blank_time<=26'd5_000_000; 6'd7: blank_time<=26'd2_000_000;6'd8: blank_time<=26'd2_000_000; 6'd9: blank_time<=26'd2_000_000; //冰城甜蜜 6'd10:blank_time<=26'd5_000_000;6'd11:blank_time<=26'd2_000_000;6'd12:blank_time<=26'd2_000_000;6'd13:blank_time<=26'd5_000_000;//蜜6'd14:blank_time<=26'd2_000_000;//你爱我6'd15:blank_time<=26'd2_000_000;6'd16:blank_time<=26'd2_000_000;6'd17:blank_time<=26'd2_000_000;6'd18:blank_time<=26'd2_000_000;//我爱你蜜雪6'd19:blank_time<=26'd2_000_000;6'd20:blank_time<=26'd5_000_000;6'd21:blank_time<=26'd2_000_000;6'd22:blank_time<=26'd2_000_000;6'd23:blank_time<=26'd2_000_000;//冰城甜蜜6'd24:blank_time<=26'd5_000_000;6'd25:blank_time<=26'd2_000_000;6'd26:blank_time<=26'd2_000_000;6'd27:blank_time<=26'd5_000_000;//蜜6'd28:blank_time<=26'd2_000_000;//你爱6'd29:blank_time<=26'd5_000_000;6'd30:blank_time<=26'd2_000_000;//我呀6'd31:blank_time<=26'd2_000_000;6'd32:blank_time<=26'd5_000_000;6'd33:blank_time<=26'd2_000_000;//我爱6'd34:blank_time<=26'd2_000_000;6'd35:blank_time<=26'd5_000_000;6'd36:blank_time<=26'd10_000_000;//你6'd37:blank_time<=26'd2_000_000;//你爱我6'd38:blank_time<=26'd2_000_000;6'd49:blank_time<=26'd2_000_000; 6'd40:blank_time<=26'd5_000_000;6'd41:blank_time<=26'd2_000_000; //我爱你蜜雪 6'd42:blank_time<=26'd2_000_000; 6'd43:blank_time<=26'd5_000_000; 6'd44:blank_time<=26'd2_000_000;6'd45:blank_time<=26'd2_000_000; 6'd46:blank_time<=26'd2_000_000; //冰城甜蜜 6'd47:blank_time<=26'd5_000_000;6'd48:blank_time<=26'd2_000_000;6'd49:blank_time<=26'd2_000_000;6'd50:blank_time<=26'd5_000_000;//蜜default:blank_time<=26'd1_000_000;endcase
end
always@(posedge clk,negedge rst_n)beginif(!rst_n)spec_data<=DO;elsecase(spec_cnt)6'd0: spec_data <= MI;//你爱我6'd1: spec_data <= SO;6'd2: spec_data <= SO; 6'd3: spec_data <= LA;6'd4: spec_data <= SO; //我爱你蜜雪 6'd5: spec_data <= MI; 6'd6: spec_data <= DO; 6'd7: spec_data <= DO;6'd8: spec_data <= RE;6'd9: spec_data <= MI; //冰城甜蜜 6'd10:spec_data <= MI;6'd11:spec_data <= RE;6'd12:spec_data <= DO;6'd13:spec_data <= RE; //蜜6'd14:spec_data <= MI; //你爱我6'd15:spec_data <= SO;6'd16:spec_data <= SO;6'd17:spec_data <= LA;6'd18:spec_data <= SO; //我爱你蜜雪 6'd19:spec_data <= MI;6'd20:spec_data <= DO;6'd21:spec_data <= DO;6'd22:spec_data <= RE;6'd23:spec_data <= MI; //冰城甜蜜6'd24:spec_data <= MI;6'd25:spec_data <= RE;6'd26:spec_data <= RE;6'd27:spec_data <= DO; //蜜6'd28:spec_data <= FA; //你爱6'd29:spec_data <= FA;6'd30:spec_data <= FA; //我呀6'd31:spec_data <= LA;6'd32:spec_data <= LA;6'd33:spec_data <= SO; //我爱6'd34:spec_data <= SO;6'd35:spec_data <= MI;6'd36:spec_data <= RE; //你6'd37:spec_data <= MI; //你爱我6'd38:spec_data <= SO;6'd39:spec_data <= SO;6'd40:spec_data <= LA;6'd41:spec_data <= SO; //我爱你蜜雪 6'd42:spec_data <= MI;6'd43:spec_data <= DO;6'd44:spec_data <= DO;6'd45:spec_data <= RE;6'd46:spec_data <= MI; //冰城甜蜜6'd47:spec_data <= MI;6'd48:spec_data <= RE;6'd49:spec_data <= RE;6'd50:spec_data <= DO; //蜜default:spec_data <= DO;endcase
end
//当前音符spec_flag
always@(posedge clk,negedge rst_n)beginif(!rst_n)spec_flag<=3'd0;elsecase(spec_data)DO:spec_flag<=3'd1;RE:spec_flag<=3'd2;MI:spec_flag<=3'd3;FA:spec_flag<=3'd4;SO:spec_flag<=3'd5;LA:spec_flag<=3'd6;XI:spec_flag<=3'd7;default:spec_flag<=3'd0;endcase
endassign duty_data = spec_data >> 4;assign end_note = note_cnt== spec_data; //spec_dara对音谱计数
assign end_spectrum = spec_cnt == NOTE_NUM && inte_cnt == continue_time;//pwm信号产生模块
always@(posedge clk or negedge rst_n)beginif(!rst_n)beginstatus <= 1'b0;end else status <= (note_cnt >= duty_data) ? 1'b1 : 1'b0;
end endmodule6.蜂鸣器
module beep_drive (input wire clk,input wire rst_n,input wire flag, //蜂鸣器开始鸣叫input wire status,output reg beep
);parameter MAX_TIME = 24'd10_000_000; //鸣叫时间
parameter MAX_TIME_MUSIC = 28'd250_000_000; //音乐播放时间reg [23:0] cnt_time; //计时
reg [27:0] cnt_time_music; //音乐播放计时器
reg flag_beep_time_out; // 计时是否结束//音乐播放计时
always @(posedge clk or negedge rst_n) beginif(!rst_n) begincnt_time_music <= 28'd0;endelse if(cnt_time_music < MAX_TIME_MUSIC) begincnt_time_music <= cnt_time_music + 28'd1;endelse cnt_time_music <= cnt_time_music;
end//蜂鸣器输出
always @(posedge clk or negedge rst_n) beginif(!rst_n) begincnt_time <= 0;beep <= 1;flag_beep_time_out <= 1;endelse if(!status && cnt_time_music < MAX_TIME_MUSIC) beginbeep <= 0;endelse if(status && cnt_time_music < MAX_TIME_MUSIC) beginbeep <= 1;endelse if(flag && flag_beep_time_out) begin //开始鸣叫cnt_time <= MAX_TIME;flag_beep_time_out <= 0;endelse if(cnt_time >=1 && !flag_beep_time_out) begincnt_time <= cnt_time -24'd1;beep <= 0;endelse if(cnt_time == 0) begin//计时结束beep <= 1;flag_beep_time_out <= 1;endelse begincnt_time <= cnt_time ;beep <= beep;flag_beep_time_out <= flag_beep_time_out;end
endendmodule
7.顶层模块
module automatic_machine_top(input wire clk , //时钟 50Minput wire rst_n , //复位input wire [2:0] key , //按键output wire beep , //蜂鸣器output wire [3:0] led , //售货机状态灯效output wire [5:0] sel , //数码管位选output wire [7:0] seg , //数码管段选output wire [6:0] lan_led //音乐播放灯效);wire status; //音乐播放驱使蜂鸣器标志
wire [2:0] key_flag; //按键消抖完成标志
wire [2:0] key_value; //按键消抖完成后的按键值
wire [4:0] led_value; //售货机驱使led模块效果的值
wire [6:0] price_put; //售货机输出到数码管的投币值
wire [6:0] price_need; //售货机输出到数码管的商品价格
wire [6:0] price_out; //售货机输出到数码管的退款
wire [2:0] spec_flag; //音乐模块输出的音符,用于音乐灯效//数码管位选模块
sel_drive inst_sel_drive(
.clk (clk) ,
.rst_n (rst_n) ,
.price_put (price_put) ,
.price_need (price_need) ,
.price_out (price_out) ,
.sel (sel)
);//数码管段选模块
seg_drive inst_seg_drive(
.clk (clk) ,
.rst_n (rst_n) ,.price_put (price_put) ,
.price_need (price_need) ,
.price_out (price_out) ,
.sel (sel) ,
.seg (seg));//售货机模块
machine_drive inst_machine_drive(
.clk (clk) ,
.rst_n (rst_n) ,
.key ({key_value[2] && key_flag[2], key_value[1] && key_flag[1], key_value[0] && key_flag[0] }),.led_value (led_value) ,
.price_put (price_put) ,
.price_need (price_need) ,
.price_out (price_out)
);//led模块
led_drive inst_led(
.clk (clk) ,
.rst_n (rst_n) ,
.value (led_value) ,.led (led)
);//音乐模块
freq_select inst_freq_select
(
.clk (clk ) ,
.rst_n (rst_n ) ,.status (status) ,
.spec_flag (spec_flag)
);//音乐灯效模块
lanterns inst_lanterns(
.clk (clk ) ,
.rst_n (rst_n ) ,
.spec_flag (spec_flag) ,.lan_led (lan_led)
);//蜂鸣器
beep_drive inst_beep_drive(
.clk (clk) ,
.rst_n (rst_n) ,
.flag ((key_value[2] && key_flag[2]) || ( key_value[1] && key_flag[1]) || (key_value[0] && key_flag[0])),
.status (status) ,
.beep (beep)
);//按键消抖
key_debounce inst_key_debounce_key0(
.clk (clk) ,
.rst_n (rst_n) ,
.key (key[0]) ,.flag (key_flag[0]) ,
.key_value (key_value[0])
);key_debounce inst_key_debounce_key1(
.clk (clk) ,
.rst_n (rst_n) ,
.key (key[1]) ,.flag (key_flag[1]) ,
.key_value (key_value[1])
);key_debounce inst_key_debounce_key2(
.clk (clk) ,
.rst_n (rst_n) ,
.key (key[2]) ,.flag (key_flag[2]) ,
.key_value (key_value[2])
);endmodule
七、仿真
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