用Verilog語(yǔ)言編寫的多功能數(shù)字鐘

1、精選優(yōu)質(zhì)文檔-傾情為你奉上數(shù)字電子技術(shù)課程設(shè)計(jì)報(bào)告專業(yè)班級(jí)：姓 名：學(xué) 號(hào)：設(shè)計(jì)日期：一 設(shè)計(jì)題目多功能數(shù)字鐘電路設(shè)計(jì)二 設(shè)計(jì)任務(wù)及要求多功能數(shù)字鐘應(yīng)該具有的功能有：顯示時(shí)分秒、整點(diǎn)報(bào)時(shí)、小時(shí)和分鐘可調(diào)等基本功能。整個(gè)鐘表的工作應(yīng)該是在1Hz信號(hào)的作用下進(jìn)行，這樣每來(lái)一個(gè)時(shí)鐘信號(hào)，秒增加1秒，當(dāng)秒從59秒跳轉(zhuǎn)到00秒時(shí)，分鐘增加1分，同時(shí)當(dāng)分鐘從59分跳轉(zhuǎn)到00分時(shí)，小時(shí)增加1小時(shí)，小時(shí)的范圍為023時(shí)。在實(shí)驗(yàn)中為了顯示的方便，由于分鐘和秒鐘顯示的范圍都是從059，所以可以用一個(gè)3位的二進(jìn)制碼顯示十位，用一個(gè)四位的二進(jìn)制碼（BCD碼）顯示個(gè)位，對(duì)于小時(shí)因?yàn)樗姆秶菑?23，所以可以用一個(gè)2位

2、的二進(jìn)制碼顯示十位，用一個(gè)4位的二進(jìn)制碼（BCD碼）顯示個(gè)位。實(shí)驗(yàn)中由于七段碼管是掃描的方式 顯示，所以雖然時(shí)鐘需要的是1Hz時(shí)鐘信號(hào)，但是掃描需要一個(gè)比較高頻率的信號(hào)，因此為了得到準(zhǔn)確的1Hz信號(hào)，必須對(duì)輸入的系統(tǒng)時(shí)鐘50Mhz進(jìn)行分頻。對(duì)于整點(diǎn)報(bào)時(shí)功能，本實(shí)驗(yàn)設(shè)計(jì)的是當(dāng)進(jìn)行正點(diǎn)的倒計(jì)時(shí)5秒時(shí)，讓LED來(lái)閃爍進(jìn)行整點(diǎn)報(bào)時(shí)的提示。調(diào)整時(shí)間的按鍵用按鍵模塊的S1和S2，S1調(diào)節(jié)小時(shí)，每按下一次，小時(shí)增加一個(gè)小時(shí)；S2調(diào)整分鐘，每按下一次，分鐘增加一分鐘。另外用S8按鍵作為系統(tǒng)時(shí)鐘復(fù)位，復(fù)位后全部顯示000000。管腳分配如下表：端口名使用模塊信號(hào)對(duì)應(yīng)FPGA管腳說(shuō)明S1按鍵開(kāi)關(guān)S1R16調(diào)整小時(shí)

3、S2按鍵開(kāi)關(guān)S2P14調(diào)整分鐘RST按鍵開(kāi)關(guān)S8M15復(fù)位LEDLED模塊D1L14整點(diǎn)倒計(jì)時(shí)LEDAG0數(shù)碼管模塊A段N4時(shí)間顯示LEDAG1數(shù)碼管模塊B段G4LEDAG2數(shù)碼管模塊C段H4LEDAG3數(shù)碼管模塊D段L5LEDAG4數(shù)碼管模塊E段L4LEDAG5數(shù)碼管模塊F段K4LEDAG6數(shù)碼管模塊G段K5SEL0數(shù)碼管選擇位1M48個(gè)數(shù)碼管的選擇位SEL1數(shù)碼管選擇位2F3SEL2數(shù)碼管選擇位3F4CP脈沖源J350Mhz脈沖三基于Verilog HDL語(yǔ)言的電路設(shè)計(jì)、仿真與綜合（一）頂層模塊本程序采用結(jié)構(gòu)化設(shè)計(jì)方法，將其分為彼此獨(dú)立又有一定聯(lián)系的三個(gè)模塊，如圖1所示：圖1：頂層結(jié)構(gòu)框圖

4、（二）子模塊 1.分頻器分頻器的作用是對(duì)50Mhz的系統(tǒng)時(shí)鐘信號(hào)進(jìn)行分頻，得到頻率為1000hz的信號(hào)，作為顯示器的輸入信號(hào)。源程序如下：module fenpin(input CP,output CPout);reg CPout;reg 31:0 Cout;reg CP_En;always (posedge CP ) /將50MHz分頻為1kHzbeginCout = (Cout = 32d50000) ? 32d0 : (Cout + 32d1);CP_En = (Cout = 32d50000) ? 1d1 : 1d0;CPout = CP_En; endendmodule功能仿真波形如

5、圖2所示(以五分頻為例)：2.控制器和計(jì)數(shù)器 控制器的作用是，調(diào)整小時(shí)和分鐘的值，并能實(shí)現(xiàn)清零功能。計(jì)數(shù)器的作用是實(shí)現(xiàn)分鐘和秒鐘滿60進(jìn)1，小時(shí)則由23跳到00。當(dāng)?shù)竭_(dá)59分55秒的時(shí)候，LED燈會(huì)閃爍來(lái)進(jìn)行報(bào)時(shí)。因?yàn)榭刂破骱陀?jì)數(shù)器的驅(qū)動(dòng)信號(hào)頻率均為1Hz，故從分頻器輸出的信號(hào)進(jìn)入控制器后，要進(jìn)行二次分頻，由1Khz變?yōu)?Hz。源程序如下：module kongzhiqi( CPout,S1,S2,RET,Hour,Minute,Second,LED);input CPout,S1,S2,RET;output 5:0 Hour;output 5:0 Minute;output 5:0 Seco

6、nd;output LED;reg 5:0 Hour;reg 5:0 Minute;reg 5:0 Second;reg R1;reg R2,R8,LED;reg 10:0 Cout;reg Clk_En;always(posedge CPout)beginif(S1=0)beginR1=1;endif(S2=0)beginR2=1;endif(RET=0)beginR8=1;endCout=(Cout=32d1000)?32d0:(Cout + 32d1);Clk_En=(Cout=32d1000)?1d1:1d0;if(Clk_En)beginif(R1=1)beginif(Hour24)

7、Hour=Hour+1;if(Hour=24)beginHour=0;endR1=0;endif(R2=1)beginif(Minute60)Minute=Minute+1;if(Minute=60)beginMinute=0;if(Hour24)Hour=Hour+1;if(Hour=24)beginHour=0;endendR2=0;endif(Second60)Second=Second+1;if(Second=60)beginSecond=0;if(Minute60)Minute=Minute+1;if(Minute=60)beginMinute=0;if(Hour55)/整點(diǎn)倒計(jì)時(shí)b

8、eginif(LED=1)LED=0;elseLED=1;endelseLED=0;if(R8=1)/清零beginHour=0;Minute=0;Second=0;R8=0;endendendendmodule功能仿真波形如圖3所示：3顯示器顯示器的作用是將時(shí)分秒的值在數(shù)碼管上依次顯示出來(lái)。從分頻器輸出的1Khz的信號(hào)作為數(shù)碼管的掃描信號(hào)。SEL 表示三個(gè)數(shù)碼管選擇位，它的取值表示八個(gè)數(shù)碼管，從左至右依次是111000。LEDGA表示七段數(shù)碼管，它的取值決定特定位數(shù)上顯示的數(shù)字。源程序如下：module xianshi( CPout,Hour,Minute,Second,SEL,LEDAG)

9、;input CPout;input Hour，Minute， Second;output SEL，LEDAG;reg 2:0 SEL;reg 6:0 Led;reg 3:0 shi1,ge1,shi2,ge2,shi3,ge3;always (posedge CPout )beginshiwei1=Hour/10;gewei1=Hour%10;shiwei2=Minute/10;gewei2=Minute%10;shiwei3=Second/10;gewei3=Second%10;if(SEL=3b110) /判斷位選SEL的值，并將此位上的值輸出到數(shù)碼管case(shiwei1) 4b00

10、00: Led = 7b0111_111;4b0001: Led = 7b0000_110;4b0010: Led = 7b1011_011;4b0011: Led = 7b1001_111;4b0100: Led = 7b1100_110;4b0101: Led = 7b1101_101;4b0110: Led = 7b1111_101;4b0111: Led = 7b0000_111;4b1000: Led = 7b1111_111;4b1001: Led = 7b1101_111; default: Led = 7b0000_000;endcaseif(SEL=3b101)case(ge

11、wei1) 4b0000: Led = 7b0111_111;4b0001: Led = 7b0000_110;4b0010: Led = 7b1011_011;4b0011: Led = 7b1001_111;4b0100: Led = 7b1100_110;4b0101: Led = 7b1101_101;4b0110: Led = 7b1111_101;4b0111: Led = 7b0000_111;4b1000: Led = 7b1111_111;4b1001: Led = 7b1101_111; default: Led = 7b0000_000;endcaseif(SEL=3b1

12、00)Led=7b1000_000;if(SEL=3b011)case(shiwei2) 4b0000: Led = 7b0111_111;4b0001: Led = 7b0000_110;4b0010: Led = 7b1011_011;4b0011: Led = 7b1001_111;4b0100: Led = 7b1100_110;4b0101: Led = 7b1101_101;4b0110: Led = 7b1111_101;4b0111: Led = 7b0000_111;4b1000: Led = 7b1111_111;4b1001: Led = 7b1101_111; defa

13、ult: Led = 7b0000_000;endcaseif(SEL=3b010)case(gewei2) 4b0000: Led = 7b0111_111;4b0001: Led = 7b0000_110;4b0010: Led = 7b1011_011;4b0011: Led = 7b1001_111;4b0100: Led = 7b1100_110;4b0101: Led = 7b1101_101;4b0110: Led = 7b1111_101;4b0111: Led = 7b0000_111;4b1000: Led = 7b1111_111;4b1001: Led = 7b1101

14、_111; default: Led = 7b0000_000;endcaseif(SEL=3b001)Led=7b1000_000;if(SEL=3b000)case(shiwei3) 4b0000: Led = 7b0111_111;4b0001: Led = 7b0000_110;4b0010: Led = 7b1011_011;4b0011: Led = 7b1001_111;4b0100: Led = 7b1100_110;4b0101: Led = 7b1101_101;4b0110: Led = 7b1111_101;4b0111: Led = 7b0000_111;4b1000

15、: Led = 7b1111_111;4b1001: Led = 7b1101_111; default: Led = 7b0000_000;endcase if(SEL=3b111)case(gewei3) 4b0000: Led = 7b0111_111;4b0001: Led = 7b0000_110;4b0010: Led = 7b1011_011;4b0011: Led = 7b1001_111;4b0100: Led = 7b1100_110;4b0101: Led = 7b1101_101;4b0110: Led = 7b1111_101;4b0111: Led = 7b0000

16、_111;4b1000: Led = 7b1111_111;4b1001: Led = 7b1101_111; default: Led = 7b0000_000;endcase SEL = SEL + 3d1; endassign LEDAG=Led;endmodule四 總結(jié)體會(huì)這次課程設(shè)計(jì)雖然只有短短的四天，但我的收獲卻很大。通過(guò)這次實(shí)習(xí)，我掌握了EDA設(shè)計(jì)的基本流程（即設(shè)計(jì)輸入編譯調(diào)試仿真下載），領(lǐng)會(huì)了自頂而下結(jié)構(gòu)化設(shè)計(jì)的優(yōu)點(diǎn)，并具備了初步的EDA程序設(shè)計(jì)能力。 我感覺(jué)，這個(gè)程序最難的地方在于頂層模塊的設(shè)計(jì)，因?yàn)轫攲幽K需要將各個(gè)子模塊按照電路原理有機(jī)地結(jié)合起來(lái)，這需要扎實(shí)的理論功底，而這正是我所欠缺的。相比而言，子模塊的設(shè)計(jì)就容易多了，因?yàn)閂erilog語(yǔ)言和C語(yǔ)言有很多