按键控制有源蜂鸣器报警 -

标题: 按键控制有源蜂鸣器报警 [打印本页]

作者: SINGO 时间: 2018-1-4 10:20
标题: 按键控制有源蜂鸣器报警
按键控制有源蜂鸣器报警：
#include <reg51.h>
  sbit BEEP=P1^0;
  sbit ButtonA=P3^2;
  sbit ButtonB=P3^3;
  bit playOn;
void Delay(unsigned int t)
  {
unsigned char m;
while(t--)
for(m=0;m<120;m++);
  }
void EXT0_ISR() interrupt 0 using 1
{
   unsigned char i;
   i f(ButtonA==0)
   {
      for(i=0;i<20;i++);
         if(ButtonA==0)
            {
                  while(ButtonA==0);
                     playOn=1;
            }
      }
}
  void EXT1_ISR() interrupt 2 using 2
{
   unsigned char i;
   if(ButtonB==0)
   {
      for(i=0;i<20;i++);
      if(ButtonB==0)
      {
            while(ButtonB==0);
            playOn=0;
         }
   }
  }
void main()
{
BEEP=1;
playOn=0;
while(1)
{
if(playOn==1)
BEEP=0;
else
BEEP=1;
Delay(1000);
}
}

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