自動售貨機設計和實現(xiàn)

1、 大 學 實 驗 報 告 課程名稱： 數(shù)字系統(tǒng)現(xiàn)場集成技術(shù) 實驗項目名稱： 實驗四（自動售貨機設計和實現(xiàn)） 學院： 專業(yè)： 指導教師： 報告人： 學號： 班級： 實驗時間： 實驗報告提交時間： 教務部制一、實驗目的與要求：基本要求：該實驗為團隊協(xié)作，2人一個小組?？梢詫?種不同種類的貨物進行自動售貨,價格分別為A=4.00, B=2.50, C=1.00。售貨機可以接受10元,5元,1元三種硬幣(即有三種輸入信號SY,WY,IY),并且在7段數(shù)碼管(二位代表元,一位代表角)顯示已投入的總錢數(shù),選擇貨物的輸入信號Ia,Ib,Ic,輸出指示信號為 Sa, Sb ,Sc 分別表示售出相應的貨物,同時

2、輸出的信號yuan, jiao代表找零，并顯示在7段數(shù)碼管上。高級要求（可選）：VGA顯示3種貨物圖片及其價格，鼠標點擊購買數(shù)量（1-9）后顯示總價，安規(guī)格說明2中的button2-button4輸入硬幣，VGA顯示已投入的總錢數(shù)，鼠標點擊購買后，顯示找零數(shù)目，購買物品閃爍，交易完成。規(guī)格說明：按一下button1按鈕，表示購買貨物A，第一個LED燈亮；按兩下button1按鈕，表示購買貨物B，第二個LED燈亮；按三下button1按鈕，表示購買貨物C，第三個LED燈亮，同時7段數(shù)碼管顯示所要購買貨物的價格。LED燈亮后，開始輸入硬幣。button2按一下，輸入10元，按兩下，輸入二十元，以此

3、類推；Button3按一下輸入5元，按兩下輸入10元，以此類推；button4按一下輸入1元，按兩下輸入2元，以此類推。7段數(shù)碼管顯示已投入的總錢數(shù)，再次按下button1鍵，7段數(shù)碼管顯示找零數(shù)目，同時指示貨物的LED燈熄滅。如果投入的錢幣不夠就按下button1鍵確認購買，數(shù)碼管顯示“ER”。本實驗使用FPGA板：Sparant6XC6SLX16CSG324C（建project時，需要選擇該芯片的型號）。二、實驗過程與代碼：1、頂層代碼：module top(input clk,input rst,input4:0 btn,output3:0 an,output7:0 seg,output

4、2:0 led ); wire clk,rst;wire7:0 first_seg,second_seg,third_seg;wire4:0 btn_down; seg_drv v1( .clk(clk), .rst(rst), .first_seg(first_seg), .second_seg(second_seg), .third_seg(third_seg), .an(an), .seg(seg) ); main v2 ( .clk(clk), .rst(rst), .btn_down(btn_down), .first_seg(first_seg), .second_seg(seco

5、nd_seg), .third_seg(third_seg), .led(led) ); btn_scan v3 ( .clk(clk), .rst(rst), .btn(btn), .btn_down(btn_down) );Endmodule2、數(shù)碼管驅(qū)動：module seg_drv(input clk,input rst,input7:0 first_seg,input7:0 second_seg,input7:0 third_seg,/input7:0 forth_seg,output reg3:0 an,output reg7:0 seg );localparam1:0 s0=2b

6、00, s1=2b01, s2=2b10, s3=2b11;reg1:0 state;always(posedge clk,posedge rst)beginif(rst)beginan=4b1111;seg=8b1111_1111;state=s0;endelsebegincase(state)s0:beginan=4b1110;seg=first_seg;if(ms_up)state=s1;elsestate=state;ends1:beginan=4b1101;seg=second_seg;if(ms_up)state=s2;elsestate=state;ends2:beginan=4

7、b1011;seg=third_seg;if(ms_up)state=s3;elsestate=state;ends3:beginan=4b0111;seg=8b1111_1111;if(ms_up)state=s0;elsestate=state;endendcaseendendreg17:0 ms_cnt;reg ms_up;always(posedge clk,posedge rst)beginif(rst)beginms_cnt=0;ms_up=0;endelsebeginif(ms_cnt=200000)beginms_cnt=0;ms_up=1;endelsebeginms_cnt

8、=ms_cnt+1b1;ms_up=0;endendendendmodule3、按鍵掃描與消抖：module btn_scan(input clk,input rst,input3:0 btn,output reg3:0 btn_down );localparam1:0 s0=2b00, s1=2b01, s2=2b10; reg1:0 state;reg3:0 btn_reg;always(posedge clk,posedge rst)beginif(rst)beginbtn_down=4b0000;state=s0;endelsebegincase(state)s0: beginbtn_

9、down=4b0000;if(btn)state=s1;elsestate=s0;ends1: beginif(cnt_done) beginif(btn)beginstate=s2;btn_reg=btn;endelse state=s0;endelsestate=s1;ends2:beginif(btn=4b0000)beginbtn_down=btn_reg;state=s0;endelsebeginbtn_down=btn_down;state=s2;endendendcaseendendreg20:0 cnt;reg cnt_done;always(posedge clk,posed

10、ge rst)beginif(rst)begincnt=21b0;cnt_done=1b0;endelse if(state=s1)begincnt=cnt+1b1;if(cnt=21d2000000)begincnt=21b0;cnt_done=1b1;endendelsebegincnt=21b0;cnt_done=1b0;endendendmodule4、主程序code：module main(input clk,input rst,input3:0 btn_down,output reg7:0 first_seg,output reg7:0 second_seg,output reg7

11、:0 third_seg,output reg2:0 led ); localparam2:0 s0=3b000,s1=3b001,s2=3b010,s3=3b011,s4=3b100,s5=3b101; reg2:0 state;reg3:0 money0,money1;reg3:0 price;reg4:0 change;reg3:0 change1,change0;always(posedge clk,posedge rst)beginif(rst)beginled = 3b000;money0 = 0;money1 = 0; change = 0;price = 0;state = s

12、0;endelsebegincase(state)s0:beginled = 3b000;if(btn_down0 = 1)state = s1;elsestate = s0; ends1:beginled = 3b100;price = 1;money0 = 0;money1 = 0;change=0; if(btn_down0 = 1)state = s2;else if(btn_down3:1)state = s4;elsestate = s1;ends2:beginled = 3b010;price=2.5;money0 = 0;money1 = 0;change = 0;if(btn

13、_down0 = 1)state = s3;else if(btn_down3:1)state = s4;elsestate = s2;ends3:beginled = 3b001;price = 4;money0 = 0;money1 = 0;change = 0;if(btn_down0 = 1)state = s1;else if(btn_down3:1)state = s4;elsestate = s3;ends4:begincase(btn_down3:1) 3b001:money1 = 10)beginmoney1 = money1 + 1;money0 = money0 - 10

14、;endelsemoney1 = money1;end 3b100:beginmoney0 = 9)beginmoney1 = money1 + 1;money0 = 0;endelsemoney1 = money1;end endcase if(btn_down0 = 1)state = s5;elsestate= price)beginchange = 20)beginchange1 = 2;change0 = 10)beginchange1 = 1;change0 = change - 10;endelsebeginchange1 = 0;change0 = change;endende

15、lsechange =5b01110;if(btn_down3:0)state = s0;elsestate=s5;endendcaseendend/譯碼always(posedge clk,posedge rst)beginif(state = s0)beginthird_seg=8b0000_0011;second_seg=8b0000_0010;first_seg=8b0000_0011;endelse if(state = s1)beginthird_seg=8b0000_0011;second_seg=8b1001_1110;first_seg=8b0000_0011;endelse

16、 if(state =s2)beginthird_seg=8b0000_0011;second_seg=8b0010_0100;first_seg=8b0100_1001;endelse if(state =s3)beginthird_seg=8b0000_0011;second_seg=8b1001_1000;first_seg=8b0000_0011;endelse if(state =s4)begincase(money0)4b0000: second_seg=8b0000_0010;4b0001: second_seg=8b1001_1110;4b0010: second_seg=8b

17、0010_0100;4b0011: second_seg=8b0000_1100;4b0100: second_seg=8b1001_1000;4b0101: second_seg=8b0100_1000;4b0110: second_seg=8b0100_0000;4b0111: second_seg=8b0001_1110;4b1000: second_seg=8b0000_0000;4b1001: second_seg=8b0000_1000;endcasecase(money1)4b0000: third_seg=8b0000_0011;4b0001: third_seg=8b1001

18、_1111;4b0010: third_seg=8b0010_0101;4b0011: third_seg=8b0000_1101;4b0100: third_seg=8b1001_1001;4b0101: third_seg=8b0100_1001;4b0110: third_seg=8b0100_0001;4b0111: third_seg=8b0001_1111;4b1000: third_seg=8b0000_0001;4b1001: third_seg=8b0000_1001;endcasefirst_seg=8b0000_0011;endelse if(state =s5)begi

19、nif(change = 5b01110)beginthird_seg=8b0000_0011;second_seg=8b0110_0001;first_seg=8b0110_0001;endelsebegincase(change0)4b0000: second_seg=8b0000_0010;4b0001: second_seg=8b1001_1110;4b0010: second_seg=8b0010_0100;4b0011: second_seg=8b0000_1100;4b0100: second_seg=8b1001_1000;4b0101: second_seg=8b0100_1000;4b0110: second_seg=8b0100_0000;4b0111: second_seg=8b0001_1110;4b1000: second_seg=8b0000_0000;4b1001: second_seg=8