单片机数字钟的设计包含电路图c语言程序mcs_51单片机.doc

单片机数字钟的设计 2007-01-16 21:46 单片机数字钟的设计开机时，显示12：00：00的时间开始计时；0.1用来P0.0用来较秒,P较分,P0.2用来较时。 C语言原程序： #include AT89X52.H unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};unsigned char dispbitcode[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; unsigned char dispbuf[8]={0,0,16,0,0,16,0,0}; unsigned char dispbitcnt; unsigned char second; unsigned char minite; unsigned char hour; unsigned int tcnt; unsigned char mstcnt;???unsigned char i,j;???void main(void) { ??? TMOD=0x02; ??? TH0=0x06; ??? TL0=0x06; ??? TR0=1; ??? ET0=1; ??? EA=1;?????? while(1) ????? { ??????? if(P0_0==0) ????????? { ??????????? for(i=5;i0;i--) ??????????? for(j=248;j0;j--); ??????????? if(P0_0==0) ????????????? { ??????????????? second++; ??????????????? if(second==60) ????????????????? { ??????????????????? second=0; ????????????????? } ??????????????? dispbuf[0]=second%10; ??????????????? dispbuf[1]=second/10; ??????????????? while(P0_0==0); ????????????? } ????????? } ??????? if(P0_1==0) ????????? { ??????????? for(i=5;i0;i--) ??????????? for(j=248;j0;j--); ??????????? if(P0_1==0) ????????????? { ??????????????? minite++; ??????????????? if(minite==60) ????????????????? { ??????????????????? minite=0; ????????????????? } ??????????????? dispbuf[3]=minite%10; ??????????????? dispbuf[4]=minite/10; ??????????????? while(P0_1==0); ????????????? } ????????? } ??????? if(P0_2==0) ????????? { ??????????? for(i=5;i0;i--) ??????????? for(j=248;j0;j--); ??????????? if(P0_2==0) ????????????? { ??????????????? hour++; ??????????????? if(hour==24) ????????????????? { ??????????????????? hour=0; ????????????????? } ??????????????? dispbuf[6]=hour%10; ??????????????? dispbuf[7]=hour/10; ??????????????? while(P0_2==0); ????????????? } ????????? } ????? } } void t0(void) interrupt 1 using 0 { ??? mstcnt++; ??? if(mstcnt==8) ????? { ??????? mstcnt=0; ??????? P1=dispcode[dispbuf[