缘由求助一下谢谢啦51单片机_嵌入式-CSDN问答设计一个蜂鸣器报警电路，按下K1，蜂鸣器响一声，按下K2，蜂鸣器响三声，按下K3,蜂鸣器长鸣。要求响声和间隔的时间均为1秒，长鸣不限时，但是此时应设置一个按键能够使长鸣结束

#include "REG52.h"
sbit K1 = P1^5;
sbit K2 = P1^6;
sbit K3 = P1^7;
sbit BUZ1=P1^0;
bit k=0;
unsigned char code SmZiFu[]={63,6,91,79,102,109,125,7,127,111,128};//0-9.
unsigned char Js=0,kz=0;//中断计时
void smxs(unsigned char mz,unsigned char w)
{unsigned char Xd=0;P0=255;P0=255-SmZiFu[mz];P2=w;while(++Xd);
}
void JiShi(/*时间计算*/)
{if(Js>=20){Js=0;kz=0;}
}
void ZhongDuanSheZhi()
{TH0+=0X4c;/*定时器赋初值，定时50ms触发中断，自动补偿方式*/TL0+=0X00; TMOD=0X01;TR0=1; ET0=1; //开启定时器EA=1; //全局中断开关
}
void main()
{unsigned char Xd=200,ss=0;unsigned int wei=0;ZhongDuanSheZhi();while(1){if(K1==0&&++Xd==0){ss=1*2;while(K1==0)smxs(ss,8);kz=1;Xd=200;}if(K2==0&&++Xd==0){ss=3*2;while(K2==0)smxs(ss,8);kz=1;Xd=200;}if(K3==0&&++Xd==0){ss=0;k=~k;while(K3==0)smxs(k?1:0,8);Xd=200;}if(ss&&!kz){++kz;k=~k;--ss;smxs(ss,8);}if(k&&++Xd==0)BUZ1=~BUZ1;JiShi();//一定要放在最后}
}
void ZhongDuan() interrupt 1
{++Js;TH0+=0X4c;TL0+=0X00;        
}

#include "REG52.h"
sbit K1 = P1^5;
sbit K2 = P1^6;
sbit K3 = P1^7;
sbit BUZ1=P1^0;
bit k=0;
unsigned char code SmZiFu[]={63,6,91,79,102,109,125,7,127,111,128};//0-9.
void smxs(unsigned char mz,unsigned char w)
{unsigned char Xd=0;P0=255;P0=255-SmZiFu[mz];P2=w;while(++Xd);
}
void main()
{unsigned char Xd=0,ss=0;unsigned int wei=0;while(1){if(K1==0&&++Xd==0){ss=1*2;while(K1==0)smxs(ss,8);}if(K2==0&&++Xd==0){ss=3*2;while(K2==0)smxs(ss,8);}if(K3==0&&++Xd==0){ss=0;k=!k;while(K3==0);}if(ss&&!++wei){k=!k;--ss;smxs(ss,8);}if(k&&++Xd==0)BUZ1=~BUZ1;}
}