C51程序先显示程序.doc

《C51程序先显示程序.doc》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、#include#defineucharunsignedchar#defineuintunsignedintbitwrite=0;sbitscl=P3^3;sbitsda=P3^4;ucharcodebable[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};ucharcodetable[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};ucharaa;uintsec

2、;voiddelay(){;;}voidxunhuan(uintz){uintx,y;for(x=z;x>0;x--)for(y=110;y>0;y--);}voidstart(){scl=1;sda=1;delay();sda=0;delay();scl=0;}voidstop(){scl=0;sda=0;scl=1;delay();sda=1;delay();}voidanswer(){sda=0;scl=0;scl=1;delay();scl=0;}voidunanswer(){sda=1;scl=0;scl=1;delay();sc

3、l=0;}voidinit(){sda=1;delay();scl=1;delay();}voidwr_by(uchardig){uchartemp,i;temp=dig;for(i=0;i<8;i++){temp=temp<<1;scl=0;delay();sda=CY;delay();scl=1;delay();}scl=0;delay();sda=1;delay();}ucharre_by(){uchari,k;scl=0;delay();sda=1;delay();for(i=0;i<8;i++){scl=1;delay();k=(

4、k<<1)

5、sda;scl=0;delay();}returnk;}voidwr_dig(ucharaddress,uintdig){start();wr_by(0xa0);answer();wr_by(address);answer();wr_by(dig/100);answer();wr_by(dig%100);unanswer();stop();}ucharre_dig(ucharaddress){uintdig,dig1;start();wr_by(0xa0);answer();wr_by(address);answer();sta

6、rt();wr_by(0xa1);answer();dig=re_by();answer();dig1=re_by();unanswer();stop();return(dig*100+dig1);}voiddisplay(ucharqian,ucharbai,ucharshi,ucharge){P2=bable[0];P0=table[qian];xunhuan(3);P2=bable[1];P0=table[bai];xunhuan(3);P2=bable[2];P0=table[shi];xunhuan(3);P2=bable[3];

7、P0=table[ge];xunhuan(3);}voidmain(){init();sec=re_dig(1);if(sec>10000)sec=0;TMOD=0x01;TH0=(65536-50000)/256;TL0=(65536-50000)%256;EA=1;ET0=1;TR0=1;while(1){display(sec/1000,sec%1000/100,sec%100/10,sec%10);if(write==1){write=0;wr_dig(1,sec);}}}voidinter()interrupt1{TH0=(655

8、36-50000)/256;TL0=(65536-50000)%256;aa++;if(aa==2){aa=0;write=1;sec++;}if(sec==10000)sec=0;