在KEIL环境下的51编程LED两位数倒计时答:unsigned char flag1=0;unsigned char counter=0;unsigned char first=0;unsigned char second=0;unsigned char code dptable[]= {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//段码表 main(){ TMOD=0x10;//定时器T1,方式1 TH1=0xfa;//晶振为3.6864MHz,每5ms进一次中断...
单片机两位数码管显示数字答:define uchar unsigned char;uchar distab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00}; //0到f uchar number,dat=29;void t0isr() interrupt 1 case 0:P2=0x02;P0=distab[dat/10];break;case 1:P2=0x01;P0=distab[da...