单片机时钟程序.doc

用C语言编写程序使89C52单片机实现数字时钟功能 #includechar code duma=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40; /0-9数码管，共阴char code wema=0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7; /片选，1-8个数码管char j;char h_num,m_num,s_num; /分别定义小时、分钟、秒char h_shi,h_ge,m_shi,m_ge,s_shi,s_ge;sbit fm=P34;void delay(char x)char a,b;for(a=x;a0;a-) for(b=100;b0;b-);void inter_init()EA=1; /开总中断ET0=1; /本例中使用的是定时器T0，如果用T1。则为ET1=0,TMOD=0x10。TMOD=0x01; /定时器工作方式1TH0=(65535-50000)/256; /因为晶振用的是11.0592MHZ。在取初值时，大概定义为一个中断为50MSTL0=(65535-50000)%256;TR0=1;void display(char h_shi,h_ge,m_shi,m_ge,s_shi,s_ge) P2=dumah_shi;P1=wema0; delay(8);P2=dumah_ge;P1=wema1; delay(8);P2=duma10;P1=wema2; delay(8);P2=dumam_shi;P1=wema3; delay(8);P2=dumam_ge;P1=wema4; delay(8);P2=duma10;P1=wema5; delay(8);P2=dumas_shi;P1=wema6; delay(8);P2=dumas_ge;P1=wema7; delay(8); void main()inter_init();s_num=55; /初始时间设置。分别是秒，分，小时m_num=59;h_num=10;while(1) if(j=20) j=0; if(s_num=59) s_num=-1; if(m_num=59) m_num=-1; if(h_num=24) h_num=-1; h_num+; fm=0; /到整点后蜂鸣器会响一下 delay(50); fm=1; m_num+; s_num+; h_shi=h_num/10; h_ge =h_num%10; m_shi=m_num/10; m_ge =m_num%10; s_shi=s_num/10; s_ge =s_num%10; display(h_shi,h_ge,m_shi,m_ge,s_shi,s_ge); void time()interrupt 1 using 1 /如果用T1的话，应为interrupt 3TH0=(65535-50000)/256;