16*1616*16116*16一、試驗(yàn)?zāi)康膶W(xué)習(xí)點(diǎn)陣顯示字符的根本原理。把握用數(shù)控分頻把握速度，實(shí)現(xiàn)點(diǎn)陣掃描的根本方式。QuartusIIVerilogHDL語言實(shí)現(xiàn)點(diǎn)真的行列循環(huán)顯示。二、試驗(yàn)設(shè)備與器件QuartusII軟件、EP2C8Q208C8試驗(yàn)箱三、試驗(yàn)方案設(shè)計(jì)試驗(yàn)可實(shí)現(xiàn)的功能語言，實(shí)現(xiàn)點(diǎn)陣的行列交替掃描。先是行掃描，掃之后，行連續(xù)掃描，依次循環(huán)。點(diǎn)陣根本學(xué)問X、YLED發(fā)亮。Y0=1，X0=0即可。應(yīng)用時(shí)限流電阻可以放16LED顯示燈。LED點(diǎn)陣每個(gè)點(diǎn)都有一個(gè)紅色的發(fā)光二極管。點(diǎn)陣內(nèi)的二極管間的連接都電尋常，所接點(diǎn)發(fā)光；反之處于截止?fàn)顟B(tài)，不放光。系統(tǒng)工作原理本系統(tǒng)用了兩個(gè)模塊，其中dianzhen.v是頂層文件，而hangsaomiao.v和liesaomiao.v3.3.1所示。開頭開頭50MHz時(shí)鐘信號1Hz分頻16s計(jì)時(shí)器N滿16s？YYN行掃描列掃描點(diǎn)陣完畢3.3.1系統(tǒng)功能圖示50MHz1s，由于要實(shí)現(xiàn)16*16的點(diǎn)陣掃描，所以用一個(gè)16s的計(jì)時(shí)器計(jì)時(shí)，每經(jīng)過16s行掃描與列掃描的狀態(tài)轉(zhuǎn)換一次，通過點(diǎn)陣顯示出來。模塊化程序設(shè)計(jì)點(diǎn)陣顯示頂層程序設(shè)計(jì)moduledianzhen(clk50mhz,row,sel0,sel1,sel2,sel3,line);input clk50mhz; //50MHz時(shí)鐘信號outputsel0,sel1,sel2,sel3; //設(shè)置引腳選通點(diǎn)陣outputreg[15:0]row; //行outputreg[3:0]line; //列wire[15:0]row1,row2;wire[3:0]line1,line2;reg[24:0]cnt=0; //1Hz計(jì)數(shù)子reg[4:0]cnt1=0; //16s計(jì)數(shù)子assignsel0=1”b0;assignsel1=1”b1;assignsel2=1”b0;assignsel3=1”b0;always@(posedgeclk50mhz)beginif(cnt>=25”d50000000)begincnt<=25”b0; //1Hz計(jì)時(shí)器cnt1<=cnt1+1; //16s計(jì)時(shí)器end

else

endcnt<=cnt+1;hangsaomiaou1(.clk50mhz(clk50mhz),.row(row1),.line(line1));liesaomiaou2(.clk50mhz(clk50mhz),.row(row2),.line(line2));always@(*)if(cnt1<=5”d15)beginrow<=row1; //行掃描line<=line1;else

endbeginrow<=row2; //列掃描line<=line2;endendmodulehangsaomiao.vmodulehangsaomiao(clk50mhz,line,row);inputclk50mhz; //50MHz時(shí)鐘信號outputreg[15:0]row; //列outputreg[3:0]line; //行reg[24:0]cnt1,cnt2; //計(jì)數(shù)子regclkrow,clkline; //行脈沖、列脈沖always@(posedgeclk50mhz)beginif(cnt1>=25”d50000000)begincnt1<=25”b0;clkrow=~clkrow; //1s列脈沖end

else

endcnt1<=cnt1+1;always@(posedgeclk50mhz)beginif(cnt2>=25”d500)end

else

begincnt2<=25”b0;clkline=~clkline; //50KHz行脈沖endcnt2<=cnt2+1;always@(posedgeclkline)begincase(line)4”d0:line<=4”d1; //高速行掃描4”d1:line<=4”d2;4”d2:line<=4”d3;4”d3:line<=4”d4;4”d4:line<=4”d5;4”d5:line<=4”d6;4”d6:line<=4”d7;4”d7:line<=4”d8;4”d8:line<=4”d9;4”d9:line<=4”d10;4”d10:line<=4”d11;4”d11:line<=4”d12;4”d12:line<=4”d13;4”d13:line<=4”d14;4”d14:line<=4”d15;4”d15:line<=4”d0;default:line<=4”d0;endcaseendalways@(posedgeclkrow) //1s的列掃描begincase(row)16”b0000000000000001:row<=16”b0000000000000010;16”b0000000000000010:row<=16”b0000000000000100;16”b0000000000000100:row<=16”b0000000000001000;16”b0000000000001000:row<=16”b0000000000010000;16”b0000000000010000:row<=16”b0000000000100000;16”b0000000000100000:row<=16”b0000000001000000;16”b0000000001000000:row<=16”b0000000010000000;16”b0000000010000000:row<=16”b0000000100000000;16”b0000000100000000:row<=16”b0000001000000000;16”b0000001000000000:row<=16”b0000010000000000;16”b0000010000000000:row<=16”b0000100000000000;16”b0000100000000000:row<=16”b0001000000000000;16”b0001000000000000:row<=16”b0010000000000000;16”b0010000000000000:row<=16”b0100000000000000;16”b0100000000000000:row<=16”b1000000000000000;16”b1000000000000000:row<=16”b0000000000000001;default :row<=16”b0000000000000001;endcaseendendmoduleliesaomiao.vmoduleliesaomiao(clk50mhz,row,line);inputclk50mhz; //50MHz時(shí)鐘信號outputreg[15:0]row; //行outputreg[3:0]line; //列reg[24:0]cnt; //計(jì)數(shù)子regclk;always@(posedgeclk50mhz)beginif(cnt>=25”d50000000)begincnt<=25”b0;clk=~clk; end

else

endcnt<=cnt+1;always@(posedgeclk) //列掃描begincase(line)4”h0:beginrow=16”b1111111111111111;line<=4”h1;end4”h1:beginrow=16”b1111111111111111;line<=4”h2;end4”h2:beginrow=16”b1111111111111111;line<=4”h3;end4”h3:beginrow=16”b1111111111111111;line<=4”h4;end4”h4:beginrow=16”b1111111111111111;line<=4”h5;end4”h5:beginrow=16”b1111111111111111;line<=4”h6;end4”h6:beginrow=16”b1111111111111111;line<=4”h7;end4”h7:beginrow=16”b1111111111111111;line<=4”h8;end4”h8:beginrow=16”b1111111111111111;line<=4”h9;end4”h9:beginrow=16”b1111111111111111;line<=4”ha;end4”ha:beginrow=16”b1111111111111111;line<=4”hb;end4”hb:beginrow=16”b1111111111111111;line<=4”hc;end4”hc:beginrow=16”b1111111111111111;line<=4”hd;end16*164”hd:beginrow=16”b1111111111111111;line<=4”he;end4”he:beginrow=16”b1111111111111111;line<=4”hf;end4”hf:beginrow=16”b1111111111111111;line<=4”h0;enddefault:line<=4”h0;endcaseendendmodule下載電路及引腳安排設(shè)計(jì)sel0、sel1、sel2、sel3四個(gè)使能端選通點(diǎn)陣，EP2C8Q208C8就會(huì)工作在給點(diǎn)陣下命令的狀態(tài)，并linerow3.5.1所示。3.5.2所示。3.5.2引腳安排616*16四、試驗(yàn)仿真及結(jié)論模塊仿真列掃描仿真波形4.1.1所示。4.1.1列掃描仿真波形1s1s第一列的二極管都是亮的。行掃描仿真波形4.1.2所示。4.1.2行掃描仿真波形116行依次循環(huán)選通，116列依次循環(huán)選通。程序中設(shè)置的行脈沖20μs1s，則被選通行的二極管全亮，并隨著列信號的循環(huán)而移動(dòng)。試驗(yàn)結(jié)論16*161s16s。先開頭行掃描，行掃描完成后列再開頭掃描，依次循環(huán)顯示在