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用89c51单片机编写时钟程序
- 2016-12-22
#include <reg51.h>sfr P1M0 =0x92;sfr P1M1 =0x91;char buf[4] ={0x01,0x02,3,4};char hour=0,min=0,sec=0;char code TAB[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; int time;void delay(void){ unsigned int j; j=1000; for(;j--;); } unsigned int count=0;void dir(void){ P0= TAB[buf[0]] ; P1=0x08; delay(); P0=0xff; //£¿£¿£¿ P1=0x02; P0= TAB[buf[1]] ; if(count>10)P0&=0x7f; P1=0x02; delay(); P0=0xff; P1=0x04; P0= TAB[buf[2]] ; //if(count>10)P0&=0x7f; delay(); P0=0xff; P1=0x01; P0= TAB[buf[3]] ; delay(); P0=0xff; P1=0x00;} void t1(void) interrupt 3 { TL1= (char)(15536&0x00ff); TH1= (char)(15536>>8); count++; if(count>19){ count=0; //buf[3]++; time++; if(time>3599) time=0; hour++ if(hour>23) } } void main(void){ char min,sec; hour P1M0 =0x0f; P1M1 =0x00; TMOD=0x10; TH1= (char)(15536>>8); TL1= (char)(15536&0x00ff); IE=0x88; TR1=1; while(1) { min=(char)(time/60) ; buf[0]=min/10; buf[1]=min%10; sec=(char)(time%60) ; buf[2]=sec/10; buf[3]=sec%10; dir(); }}利用这个程序改编，要求每10分、20分、30分整分数码管闪烁5秒
用89c51单片机编写时钟程序
- 2016-12-22
#include <reg51.h>sfr P1M0 =0x92;sfr P1M1 =0x91;char buf[4] ={0x01,0x02,3,4};char hour=0,min=0,sec=0;char code TAB[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; int time;void delay(void){ unsigned int j; j=1000; for(;j--;); } unsigned int count=0;void dir(void){ P0= TAB[buf[0]] ; P1=0x08; delay(); P0=0xff; //£¿£¿£¿ P1=0x02; P0= TAB[buf[1]] ; if(count>10)P0&=0x7f; P1=0x02; delay(); P0=0xff; P1=0x04; P0= TAB[buf[2]] ; //if(count>10)P0&=0x7f; delay(); P0=0xff; P1=0x01; P0= TAB[buf[3]] ; delay(); P0=0xff; P1=0x00;} void t1(void) interrupt 3 { TL1= (char)(15536&0x00ff); TH1= (char)(15536>>8); count++; if(count>19){ count=0; //buf[3]++; time++; if(time>3599) time=0; hour++ if(hour>23) } } void main(void){ char min,sec; hour P1M0 =0x0f; P1M1 =0x00; TMOD=0x10; TH1= (char)(15536>>8); TL1= (char)(15536&0x00ff); IE=0x88; TR1=1; while(1) { min=(char)(time/60) ; buf[0]=min/10; buf[1]=min%10; sec=(char)(time%60) ; buf[2]=sec/10; buf[3]=sec%10; dir(); }}这个程序可以显示四位数码管（分别显示小时、分），想利用这个程序再加一些程序，要求整点时蜂鸣器响5秒
用89c51单片机编写时钟程序
- 2016-12-22
#include <reg51.h>sfr P1M0 =0x92;sfr P1M1 =0x91;char buf[4] ={0x01,0x02,3,4};char hour=0,min=0,sec=0;char code TAB[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; int time;void delay(void){ unsigned int j; j=1000; for(;j--;); } unsigned int count=0;void dir(void){ P0= TAB[buf[0]] ; P1=0x08; delay(); P0=0xff; //£¿£¿£¿ P1=0x02; P0= TAB[buf[1]] ; if(count>10)P0&=0x7f; P1=0x02; delay(); P0=0xff; P1=0x04; P0= TAB[buf[2]] ; //if(count>10)P0&=0x7f; delay(); P0=0xff; P1=0x01; P0= TAB[buf[3]] ; delay(); P0=0xff; P1=0x00;} void t1(void) interrupt 3 { TL1= (char)(15536&0x00ff); TH1= (char)(15536>>8); count++; if(count>19){ count=0; //buf[3]++; time++; if(time>3599) time=0; hour++ if(hour>23) } } void main(void){ char min,sec; hour P1M0 =0x0f; P1M1 =0x00; TMOD=0x10; TH1= (char)(15536>>8); TL1= (char)(15536&0x00ff); IE=0x88; TR1=1; while(1) { min=(char)(time/60) ; buf[0]=min/10; buf[1]=min%10; sec=(char)(time%60) ; buf[2]=sec/10; buf[3]=sec%10; dir(); }}这个程序每步的解释