为什么我按单片机矩阵按键时，蜂鸣器的功能却都实现不了，求大神看看程序哪里错了 -

标题: 为什么我按单片机矩阵按键时，蜂鸣器的功能却都实现不了，求大神看看程序哪里错了 [打印本页]

作者: 用户2111142 时间: 2015-11-29 23:40
标题: 为什么我按单片机矩阵按键时，蜂鸣器的功能却都实现不了，求大神看看程序哪里错了
当每按一次点阵按键的其中一个时，蜂鸣器都会响一次，为什么我按点阵按键时，蜂鸣器的功能却都实现不了，求教。。。。[attach]15813[/attach]

#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar key=0,ke=125,n;
uchar w;
uchar a;
uint j,k,m;

sbit keyin1=P1^0;
sbit keyin2=P1^1;
sbit keyout1=P1^2;
sbit keyout2=P1^3;
sbit s5=P1^7;
uchar code led1[8][8]=
{

{0xFF,0xFF,0xFF,0x7F,0xFF,0xFF,0xFF,0xFF},
{0xFF,0xFF,0x7F,0x3F,0x7F,0xFF,0xFF,0xFF},
{0xFF,0x7F,0xBF,0x1F,0xBF,0x7F,0xFF,0xFF},
{0xFF,0xBF,0xDF,0x0F,0xDF,0xBF,0xFF,0xFF},
{0xFF,0xDF,0xEF,0x87,0xEF,0xDF,0xFF,0xFF},
{0xFF,0xEF,0xF7,0xC3,0xF7,0xEF,0xFF,0xFF},
{0xFF,0xF7,0xFB,0xE1,0xFB,0xF7,0xFF,0xFF},
{0xFF,0xFB,0xFD,0xF0,0xFD,0xFB,0xFF,0xFF}

};
  uchar code led2[8][8]=
{

{0xFF,0xFF,0xFF,0xFE,0xFF,0xFF,0xFF,0xFF},
{0xFF,0xFF,0xFE,0xFC,0xFE,0xFF,0xFF,0xFF},
{0xFF,0xFE,0xFD,0xF8,0xFD,0xFE,0xFF,0xFF},
{0xFF,0xFD,0xFB,0xF0,0xFB,0xFD,0xFF,0xFF},
{0xFF,0xFB,0xF7,0xE1,0xF7,0xFB,0xFF,0xFF},
{0xFF,0xF7,0xEF,0xC3,0xEF,0xF7,0xFF,0xFF},
{0xFF,0xEF,0xDF,0x87,0xDF,0xEF,0xFF,0xFF},
{0xFF,0xDF,0xBF,0x0F,0xBF,0xDF,0xFF,0xFF}

};



void Delay(unsigned int i )

{
unsigned int k ;
   for (k=0;k<i;k++);

}

uchar  keyscan(void)
  {
keyout2=0;    keyout1=1;
   if(keyin1==0)
   {
Delay(10);
if(keyin1==0)
{

   s5=1;
Delay(200);
   s5=0;
key=1;
}
   }
   if(keyin2==0)
   {
Delay(10);
if(keyin2==0)
{
   s5=0;
   Delay(200);
   s5=1;
   if(ke==5) ke=5;
   else ke=ke-40;

}
   }
   while((keyin1==0)||(keyin2==0)) ;
   keyout2=1;    keyout1=0;
   if(keyin1==0)
   {
Delay(10);
if(keyin1==0)
{
   s5=0;
   Delay(10);
   s5=1;
   key=3;
}
   }
   if(keyin2==0)
   {
Delay(20);
if(keyin2==0)
{
   s5=1;
   Delay(200);
   s5=0;
   if(ke==245)ke=245;
   ke=ke+40;
}
   }
   while((keyin1==0)||(keyin2==0)) ;
      return key;
  }

   void  main ()
{

   while(1)
   {
key=keyscan();
      n=key ;

   if(n==1)
   {
        s5=0;
Delay(10);
   s5=1;

   a=0x01;

for (k=0;k<8;k++)

   {

     P0=~a;
a=_crol_(a,1);
for (m=0;m<20;m++);


   for (m=0;m<ke;m++)
   {w=0x01;
   for(j=0;j<8;j++)
   {    if(n==3)break;
      key=keyscan();
      n=key ;
      P2=w;
P3=led2[k][j];
   Delay(50);
w<<=1;

   }

   }

   }

   }

   if(n==3 )
{
   s5=0;
Delay(10);
   s5=1;

   a=0x01;

for (k=0;k<8;k++)

   {
     P0=~a;
a=_cror_(a,1);
for (m=0;m<20;m++);


   for (m=0;m<ke;m++)
   {w=0x01;

   for(j=0;j<8;j++)
   { if(n==1)break;
   key=keyscan();
      n=key ;
      P2=w;
P3=led1[k][j];
   Delay(50);
w<<=1;

   }

   }

   }
      }

}
   }

[attach]15813[/attach]

作者: ahshmj 时间: 2015-11-30 11:27
得看你的电路是怎么接的。

作者: 用户2111142 时间: 2015-11-30 20:44

ahshmj 发表于 2015-11-30 11:27
得看你的电路是怎么接的。

图片传不上去

作者: ahshmj 时间: 2015-12-3 19:07
你那蜂鸣器响的时间太短了吧？而且是当K4是高电平时才响。89c52高电平好像驱动不了这个三极管，否则你一上电他就会不停地响。

作者: ahshmj 时间: 2015-12-3 19:09
你可以改一下，用低电平驱动。

作者: 腾飞的龙 时间: 2015-12-4 12:55
把驱动蜂鸣器的三极管换成pnp型8550

作者: liuzhaoxin1020 时间: 2016-12-31 15:28
结合电路分析

作者: liuzhaoxin1020 时间: 2016-12-31 15:29
换一下三极管试试

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