基于單片機的電子換號牌-畢業(yè)論文

無錫科技職業(yè)學(xué)院畢業(yè)設(shè)計（論文）基于單片機的電子換號牌的設(shè)計參考文獻[1]夏鳴風(fēng).數(shù)字電子技術(shù)實驗[M].重慶：重慶大學(xué)電氣工程學(xué)院，2010.2[2]唐治德.數(shù)字電子技術(shù)基礎(chǔ)[M].第一版.北京：科學(xué)出版社，2009.8[3]潘松，黃繼業(yè).EDA技術(shù)使用教程[M].北京：科學(xué)技術(shù)出版社，2002[4]王金明，楊吉斌.數(shù)字系統(tǒng)設(shè)計與VerilogHDL.北京：電子工業(yè)出版社，2002附錄附錄1程序#include"at89x52.h"unsignedcharcodedispcode[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//顯示0-9編碼unsignedchardatadatabuf[4]={0,0,0,0};//顯示初始值unsignedcharx1;//定義一個數(shù)據(jù)變量出來unsignedcharx2;unsignedchary1;unsignedchary2;unsignedchardisplay_flag=0;#defineucharunsignedcharsbitsda=P1^2;sbitscl=P1^3;sbitk1=P1^0;//KEY輸入端sbitk2=P1^1;//KEY輸入端sbitk3=P1^4;//KEY輸入端unsignedkflag2,kflag3,kflag1=0;unsignedintb=0;unsignedlongz,x,y=0;unsignedchartemp;unsignedcharkey;unsignedchari,j;voidkey_s(void){P2=0xff;P2_4=0;temp=P2;temp=temp&0x0f;if(temp!=0x0f){for(i=50;i>0;i--)for(j=200;j>0;j--);temp=P2;temp=temp&0x0f;if(temp!=0x0f){temp=P2;temp=temp&0x0f;switch(temp){case0x0e:key=3;break;case0x0d:key=2;break;case0x0b:key=1;break;}temp=P2;x++; temp=temp&0x0f;while(temp!=0x0f){temp=P2;temp=temp&0x0f;}}}P2=0xff;P2_5=0;temp=P2;temp=temp&0x0f;if(temp!=0x0f){for(i=50;i>0;i--)for(j=200;j>0;j--);temp=P2;temp=temp&0x0f;if(temp!=0x0f){temp=P2;temp=temp&0x0f;switch(temp){case0x0e:key=6;break;case0x0d:key=5;break;case0x0b:key=4;break;}temp=P2;x++; temp=temp&0x0f;while(temp!=0x0f){temp=P2;temp=temp&0x0f;}}}P2=0xff;P2_6=0;temp=P2;temp=temp&0x0f;if(temp!=0x0f){for(i=50;i>0;i--)for(j=200;j>0;j--);temp=P2;temp=temp&0x0f;if(temp!=0x0f){temp=P2;temp=temp&0x0f;switch(temp){case0x0e:key=9;break;case0x0d:key=8;break;case0x0b:key=7;break;}temp=P2;x++; temp=temp&0x0f;while(temp!=0x0f){temp=P2;temp=temp&0x0f;}}}P2=0xff;P2_7=0;temp=P2;temp=temp&0x0f;if(temp!=0x0f){for(i=50;i>0;i--)for(j=200;j>0;j--);temp=P2;temp=temp&0x0f;if(temp!=0x0f){temp=P2;temp=temp&0x0f;switch(temp){case0x0e:z++;break;case0x0d:key=0;break;case0x0b:y=1;break;}temp=P2;x++;temp=temp&0x0f;while(temp!=0x0f){temp=P2;temp=temp&0x0f;}}}voidkey_scan(){if(k2==0){if(b>=10) { if(k2==0) { while(k2==0); kflag2++; b=0; } } }}uchara;voiddelay(){;;}voidstart()//開始信號{ sda=1; delay(); scl=1; delay(); sda=0; delay();}voidstop()//停止{ sda=0; delay(); scl=1; delay(); sda=1; delay();}voidrespons()//應(yīng)答{ uchari; scl=1; delay(); while((sda==1)&&(i<250))i++; scl=0; delay();}voidinit(){ sda=1; delay(); scl=1; delay();}voidwrite_byte(uchardate){ uchari,temp; temp=date; for(i=0;i<8;i++) { temp=temp<<1; scl=0; delay(); sda=CY; delay(); scl=1; delay(); // scl=0;//delay(); } scl=0; delay(); sda=1; delay();}ucharread_byte(){ uchari,k; scl=0; delay(); sda=1; delay(); for(i=0;i<8;i++) { scl=1; delay(); k=(k<<1)|sda; scl=0; delay(); } returnk;}voiddelay1(ucharx){ uchara,b; for(a=x;a>0;a--) for(b=100;b>0;b--);}voidwrite_add(ucharaddress,uchardate){ start(); write_byte(0xa0); respons(); write_byte(address); respons(); write_byte(date); respons(); stop();}ucharread_add(ucharaddress){ uchardate; start(); write_byte(0xa0); respons(); write_byte(address); respons(); start(); write_byte(0xa1); respons(); date=read_byte(); stop(); returndate;}voiddisplay(void){switch(display_flag){case1:if(z==0) {P3=0xfe; P0=dispcode[databuf[0]];} else{P0=0x00;} break; case2: if(z==0) {P3=0xfd;voidkey_wr(){k1=1;//按鍵按下低電平有效，先賦予高值if(k1==0){if(b>=10) { if(k1==0)//判斷K1是否按下 { while(k1==0);//當(dāng)K1處于被按下狀態(tài)時候一直等待 kflag1++; b=0; if(kflag1==1){write_add(0x00,x1); delay1(20); write_add(0x01,x2); delay1(20); write_add(0x02,y1); delay1(20); write_add(0x03,y2); delay1(20); } if(kflag1==2) {//kflag1=0; voidmain(){P3=0x00;//P1=0x00;P2=0x00;TMOD=0x11; TH0=(65536-1000)/256; TL0=(65536-1000)%256; TH1=(65536-1000)/256; TL1=(65536-1000)%256; IE=0x8a; EA=1; ET1=1; TR1=1; TR0=1; init(); while(1) {key_wr(); display_data_change(); if(kflag2==1){ x1=read_add(0x00); x2=read_add(0x01); y1=read_add(0x02); y2=read_add(0x03);} if(kflag2==2){//kflag2=0; x1=read