自动售货机设计Verilog.docx

1、自动售货机设计Verilog自动售货机设计一、实验目的 1、实现自动售货机的功能； 2、运用状态机原理设计。二、实验容这种自动售货机只销售听装与瓶装两种罐装可乐，售价均为1.5元。顾客只能通过两个不同的投币口分别投入五角的硬币或者一元硬币。一次交易可以买多罐，且自动找零。若钱不够，则自动退币。并且在购买之前只要一按下取消键cancel就马上无条件退币。此机器的硬件示电路，以二個按键电路代替二個投币孔，以两个八段数码管显示投币数量，再以4hz闪烁之led來显示退币，以两个八段数码管显示退币数量。此机器就采用1024hz的系统clock信号同步所有的买卖行为，并且作为弹跳消除电路的基准参考脉冲。这

2、个电路虽然是纯数位电路但是可作为一个自动售货机的控制核心电路加上驱动器就可以用来驱动机械装置。下图为自动售货机的操作盘，有两个投币按钮，分別为五角硬币与一元硬币。每投入一个硬币就将下方的LED指示灯号点亮到具体数额，并且最高上限只能接受9.5元的金额。另外，每一种饮料商品都配置3个灯号（分别显示存货、选择数量与出货等三个信息）与一个选择购买的按钮。每按一次选择购买按钮，选择数量显示加1，并且存货自动计算，若没有货存，则货存灯灭，一旦选择商品与投币金额足够，就需要按下确定要购买的按键；当然也可以后悔不买而按下取消键，让机器退回已经投入的硬币。如若投入的钱币不足以购所有的饮料，则退币。退币时货存更

3、改为原状态。三、程序设计module auto_vending(clk,cel_cola,cel_diet,reset,coin_ten,coin_five,ok_buy,cancel_buy,/输入led_cola_ok,led_diet_ok,led_buy,led_cancel,led_cola_out,led_diet_out,shu_cola_sel,shu_diet_sel,led_display,shu_money_return,Hex);/输出input clk,cel_cola,cel_diet,reset,coin_ten,coin_five,ok_buy,cancel_b

4、uy;output led_cola_ok,led_diet_ok,/表示还有存货 led_buy,led_cancel,/表示选择购买和取消购买 led_cola_out,led_diet_out;/显示表示已出货 /led_return;/每四秒闪烁一次代表被退之硬币wire 10:0led_cola_sel,led_diet_sel;/选中饮料的数量output 6:0shu_cola_sel,shu_diet_sel;output 13:0led_display;/表示投币的金额output 13:0shu_money_return;wire ok,cancel,money_ok;/在

5、ok_or_cancel出来的/wire 10:0no_diet,no_cola;/售货机的饮料数量wire 10:0money_return;/reg 10:0no_sock_cola,no_sock_diet;wire 10:0total_count,total_consum;output 13:0Hex;assign Hex=14b111_111_111_11111;parameter Idle = 2d0, S1 = 2d1, S2 = 2d2;reg 1:0state;reg clk_1;reg rst;reg 29:0count;always(posedge clk)/sheng

6、cheng 1s de shi zhongbegin if(count=30d25000000) begin clk_1=clk_1; count=0; end else count=count+1;end always(posedge clk_1 or negedge reset) if(!reset) begin state =Idle; rst=0; end else case (state) Idle: begin rst=0; state=S1; end S1: begin rst=1; if(ok_buy|cancel_buy) state=Idle; end endcase wi

7、re buyok;toubi u1(rst,clk,coin_five,coin_ten,led_display,total_count);select_drink u2(clk,rst,cel_cola,cel_diet,/*no_cola,no_diet,*/ led_cola_sel,led_diet_sel,/*led_cola_ok,led_diet_ok,*/total_consum); ok_or_cancel u3(clk,rst,ok_buy,cancel_buy,ok,cancel,led_buy,led_cancel);give_check u4(reset,buyok,

8、clk,ok,money_ok,rst,led_cola_out,led_diet_out, led_cola_sel,led_diet_sel,led_cola_ok,led_diet_ok/*no_cola,no_diet*/); coin_return u5(clk,rst,ok_buy,money_return,total_count,total_consum,money_ok,cancel_buy,cancel);xianshi q1(led_cola_sel,shu_cola_sel);xianshi q2(led_diet_sel,shu_diet_sel);xianshi2 w

9、2(money_return,shu_money_return);endmodule/显示数量的 module xianshi(a,b); /用来显示input 10:0a;output reg 6:0b;always(a) case(a) 11d0:b=7b1000000; 11d1:b=7b1111001; 11d2:b=7b0100100; 11d3:b=7b0110000; 11d4:b=7b0011001; 11d5:b=7b0010010; 11d6:b=7b0000010; 11d7:b=7b1111000; 11d8:b=7b0000000; 11d9:b=7b0010000;

10、 endcaseendmodule/钱数显示module xianshi2(total_count,led_display);input 10:0total_count;output reg 13:0led_display;always(total_count) case(total_count) 11d0: led_display=14b1000000_1000000; 11d1: led_display=14b1000000_0010010; 11d2: led_display=14b1111001_1000000; 11d3: led_display=14b1111001_0010010

11、; 11d4: led_display=14b0100100_1000000; 11d5: led_display=14b0100100_0010010; 11d6: led_display=14b0110000_1000000; 11d7: led_display=14b0110000_0010010; 11d8: led_display=14b0011001_1000000; 11d9: led_display=14b0011001_0010010; 11d10: led_display=14b0010010_1000000; 11d11: led_display=14b0010010_0

12、010010; 11d12: led_display=14b0000010_1000000; 11d13: led_display=14b0000010_0010010; 11d14: led_display=14b1111000_1000000; 11d15: led_display=14b1111000_0010010; 11d16: led_display=14b0000000_1000000; 11d17: led_display=14b0000000_0010010; 11d18: led_display=14b0010000_1000000; 11d19: led_display=

13、14b0010000_0010010; endcaseendmodule/去抖模块module qudou(clk,reset,k,key);input k,reset,clk;output reg key;reg 10:0clock;always(posedge clk)if(!reset) clock=11d0;elsebegin if(k) begin key=1; clock=0; end else begin clock=clock+1; if(clock=1000) begin clock=11b0; key=0; end end end endmodule/投币电路module

14、toubi(reset,clk,coin_05,coin_10,led_display,total_count);/加一个去抖模块input reset,clk,coin_05,coin_10;output 13:0led_display;output reg10:0total_count;/统计投入里面的金币wire qu_coin_05,qu_coin_10;qudou a1(clk,reset,coin_05,qu_coin_05);qudou a2(clk,reset,coin_10,qu_coin_10);reg 10:0count_1,count_2;always(negedge

15、qu_coin_05 or negedge reset)begin if(!reset) begin count_1=11d0; end else if(!qu_coin_05) begin count_1 = count_1+11d1; end endalways(negedge qu_coin_10 or negedge reset) if(!reset) begin count_2=11d0; end else if(!coin_10) begin count_2=count_2+11d2; endalways(count_1 or count_2) total_count=count_

16、2+count_1; xianshi2 a4(total_count,led_display);endmodule/饮料选择处理模块module select_drink(clk,reset,select_cola,select_diet/*,sock_cola,sock_diet*/, cola_sel,diet_sel,/*led_cola_ok,led_diet_ok,*/total_consum);input clk,reset,select_cola,select_diet;/input 10:0sock_cola,sock_diet;/系统部库存数量output 10:0cola_

17、sel,diet_sel;/选中的饮料数量reg 10:0cola,diet;/output led_cola_ok,led_diet_ok;/除去选中的饮料外，是否还有余量output 10:0total_consum;/消费金额reg 10:0cola_sel,diet_sel;/reg led_cola_ok,led_diet_ok;wire select_cola_out,select_diet_out;qudou a3(clk,reset,select_cola,select_cola_out);qudou a4(clk,reset,select_diet,select_diet_o

18、ut);reg 10:0total_consum_2,total_consum_1,total_consum;always(total_consum_2 or total_consum_1) total_consum=total_consum_2+total_consum_1;always(negedge reset or negedge select_cola_out ) if(!reset) begin cola_sel=0; total_consum_1=0; end else if(!select_cola_out) begin cola_sel=cola_sel+1; total_c

19、onsum_1=total_consum_1+11d3; end always(negedge reset or negedge select_diet_out) if(!reset) begin diet_sel=0; total_consum_2=0; end else if(!select_diet_out) begin diet_sel=diet_sel+1; total_consum_2=total_consum_2+11d3; end/* always(posedge clk or negedge reset) if(!reset) begin led_cola_ok=1; led

20、_diet_ok=1; end else begin cola = sock_cola; diet = cola) led_cola_ok = diet) led_diet_ok = 0; end*/Endmodule/确认与取消电路模块module ok_or_cancel(clk,reset,ok_buy,cancel_buy, ok,cancel,/给其他模块使用 led_buy,led_cancel);/对外显示 input clk,reset,ok_buy,cancel_buy;output reg ok,cancel;output reg led_buy,led_cancel;al

21、ways(posedge clk or negedge reset) if(!reset) begin ok=0; cancel=0; led_buy=0; led_cancel=0; end else if(ok_buy) begin ok=1; led_buy=1; cancel=0; led_cancel=0; end else if(cancel_buy) begin ok=0; cancel=1; led_buy=0; led_cancel=1; endendmodule/出货并计算存货模块module give_check(reset,buyok,clk,ok,money_ok,r

22、st,led_cola_out,led_diet_out, cola_out,diet_out,led_cola_ok,led_diet_ok/*no_cola,no_diet*/);input reset,clk,ok,rst,money_ok;input 10:0cola_out,diet_out;/从售货机取出的饮料数量output reg led_cola_ok,led_diet_ok;/显示是否还有饮料reg 10:0no_cola,no_diet,sock_cola,sock_diet;/输出的饮料之后售货机部剩余数量output led_cola_out,led_diet_out

23、;/售货机输出饮料时led亮reg led_cola_out,led_diet_out;reg 1:0state;parameter S1=2d0, S2=2d1, S3=2d2;reg s1,s2;output reg buyok; always(posedge clk or negedge reset) if(!reset) begin sock_cola=11d5; sock_diet=11d5; end else if(!rst) begin led_cola_out=0; led_diet_out=0; state=S1; s1=0; s2=0; no_cola=sock_cola;

24、 no_diet=sock_diet; buyok 0) begin led_cola_out = 1; no_cola=no_cola - cola_out; s1 0) begin led_diet_out = 1; no_diet=no_diet - diet_out; s2=1; end state=S2; end S2: begin state=S2; buyok=1; sock_cola=no_cola; sock_diet=no_diet; end endcase always(posedge clk or negedge rst) if(!rst) begin led_cola

25、_ok=1; led_diet_ok= no_cola) led_cola_ok = no_diet) led_diet_ok = 0; endendmodule/退币处理电路模块module coin_return(clk,reset,ok_buy,led_return,total_count,total_consum,money_ok,cancel_buy,cancel);input clk,ok_buy,reset,cancel_buy,cancel;/return_clk来指定给退币闪烁警示灯input 10:0total_count,total_consum;output reg 1

26、0:0led_return;/用来显示退出货币的总数output reg money_ok;always(posedge clk or negedge reset) if(!reset) begin led_return=0; money_ok=0; end else if(cancel_buy) begin led_return=total_count; money_ok= total_consum) if(ok_buy) begin led_return=total_count-total_consum; money_ok=1; end else begin money_ok=0; endendmodule四、实验结果 在 DE2开发板上实现了自动售货机的功能。