串口控制数码管显示数字.doc

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1、#includeunsignedcharflag,bai,shi,ge;#defineuintunsignedint#defineucharunsignedcharuinta;sbitwela=P2^7;sbitdula=P2^6;unsignedcharcodetable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};voiddelay(uintz){ui

2、ntx,y;for(x=z;x>0;x--)for(y=110;y>0;y--);}voiddisplay(ucharbai,ucharshi,ucharge){dula=1;P0=table[bai];dula=0;P0=0xff;wela=1;P0=0xfe;wela=0;delay(1);dula=1;P0=table[shi];dula=0;P0=0xff;wela=1;P0=0xfd;wela=0;delay(1);dula=1;P0=table[ge];dula=0;P0=0xff;

3、wela=1;P0=0xfb;wela=0;delay(1);}voidmain(){TMOD=0x20;TH1=0xE6;TL1=0xE6;TR1=1;SM0=0;SM1=1;REN=1;EA=1;ES=1;while(1){if(flag==1){ES=0;flag=0;bai=a/100;shi=a%100/10;ge=a%10;ES=1;}display(bai,shi,ge);}}voidser()interrupt4{RI=0;a=SBUF;flag=1;}