数码管动态显示单片机项目带仿真PPT.rar

/**************************************************************************/ // 通过定时器中断，实现六位数码管的动态显示 /**************************************************************************/ #include<reg51.h> #define uchar unsigned char #define uint unsigned int uchar j = 0, sec,min,hour; uint i; bit flash; sbit dop = P0^7; //小数点段 code uchar seven_seg[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; code uchar seven_bit[] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf}; void timer0_init(void) //初始化 { TMOD = 0x01; TH0 = 0xf8; //(65536 - 2000)/ 256; TL0 = 0x30; //(65536 - 2000)% 256; TR0 = 1; EA = 1; ET0 = 1; } void timer0_isr(void) interrupt 1 //中断 { TR0 = 0; EA = 0; TH0 = 0xf8; TL0 = 0x30; TR0 = 1; EA = 1; P0 = 0xff; //让数码管不显示内容，防止信号串扰 i++; if(i >= 500) //刚好1秒 { i = 0; sec++; flash = !flash; //2秒改变一次状态，如果想让flash1秒改变一次状态怎样做？ } if(sec >= 60) { sec = 0; min++; } if(min >= 60) { min = 0; hour++; } if(hour >= 24) hour = 0; switch(j) { case 0: P0 = seven_seg[sec % 10]; break; //显示秒个位 case 1: P0 = seven_seg[sec / 10]; break; case 2: P0 = seven_seg[min % 10];dop = flash;break; case 3: P0 = seven_seg[min / 10]; break; case 4: P0 = seven_seg[hour % 10];dop = flash; ;break; case 5: P0 = seven_seg[hour / 10]; break; } P2 = seven_bit[j]; //每中断一次只显示一位数码管，显示停留时间为中断间隔 j ++; if(j >= 6) j=0; //循环变量清零 } void main(void) { sec = 30; min = 30; hour = 8; P2 = 0xff; timer0_init(); while(1); }