6． C语言源程序
#include <AT89X51.H>

unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};
unsigned char code dispbitcode[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char dispbuf[8]={0,16,16,16,16,16,16,16};
unsigned char dispbitcount;
unsigned char temp;
unsigned char i,j;
unsigned char key;
unsigned char keypos;
bit alarmflag;

void change(unsigned char *p,unsigned char count)
{
while(count>0)
{
*(p+count)=*(p+count-1);
count--;
}
}

void main(void)
{
TMOD=0x01;
TH0=(65536-4000) / 256;
TL0=(65536-4000) % 256;
TR0=1;
ET0=1;
EA=1;

while(1)
{
P3=0xff;
P3_4=0;
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
for(i=50;i>0;i--)
for(j=200;j>0;j--);
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
switch(temp)
{
case 0x0e:
key=7;
break;
case 0x0d:
key=8;
break;
case 0x0b:
key=9;
break;
case 0x07:
key=10;
break;
}
if ((key>=0) && (key<10))
{
keypos++;
if(keypos<8)
{
change(dispbuf,keypos);
dispbuf[0]=key;
}
else
{
keypos=8;
alarmflag=1;
}
}
temp=P3;
P1_0=~P1_0;
temp=temp & 0x0f;
while(temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
}
alarmflag=0;
}
}

P3=0xff;
P3_5=0;
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
for(i=50;i>0;i--)
for(j=200;j>0;j--);
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
switch(temp)
{
case 0x0e:
key=4;
break;
case 0x0d:
key=5;
break;
case 0x0b:
key=6;
break;
case 0x07:
key=11;
break;
}
if ((key>=0) && (key<10))
{
keypos++;
if(keypos<8)
{
change(dispbuf,keypos);
dispbuf[0]=key;
}
else
{
keypos=8;
alarmflag=1;
}
}
temp=P3;
P1_0=~P1_0;
temp=temp & 0x0f;
while(temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
}
alarmflag=0;
}
}

P3=0xff;
P3_6=0;
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
for(i=50;i>0;i--)
for(j=200;j>0;j--);
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
switch(temp)
{
case 0x0e:
key=1;
break;
case 0x0d:
key=2;
break;
case 0x0b:
key=3;
break;
case 0x07:
key=12;
break;
}
if ((key>=0) && (key<10))
{
keypos++;
if(keypos<8)
{
change(dispbuf,keypos);
dispbuf[0]=key;
}
else
{
keypos=8;
alarmflag=1;
}
}
temp=P3;
P1_0=~P1_0;
temp=temp & 0x0f;
while(temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
}
alarmflag=0;
}
}

P3=0xff;
P3_7=0;
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
for(i=50;i>0;i--)
for(j=200;j>0;j--);
temp=P3;
temp=temp & 0x0f;
if (temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
switch(temp)
{
case 0x0e:
key=0;
break;
case 0x0d:
key=13;
break;
case 0x0b:
key=14;
break;
case 0x07:
key=15;
break;
}
if ((key>=0) && (key<10))
{
keypos++;
if(keypos<8)
{
change(dispbuf,keypos);
dispbuf[0]=key;
}
else
{
keypos=8;
alarmflag=1;
}
}
temp=P3;
P1_0=~P1_0;
temp=temp & 0x0f;
while(temp!=0x0f)
{
temp=P3;
temp=temp & 0x0f;
}
alarmflag=0;
}
}

}
}

void t0(void) interrupt 1 using 0
{
TH0=(65536-4000) / 256;
TL0=(65536-4000) % 256;
P0=dispcode[dispbuf[dispbitcount]];
P2=dispbitcode[dispbitcount];
dispbitcount++;
if (dispbitcount==8)
{
dispbitcount=0;
}
if (alarmflag==1)
{
P1_1=~P1_1;
}
}

  

• 评论内容...
• 匿名发表
• [添加到收藏夹]
• 发表评论：(匿名发表无需登录，已登录用户可直接发表。) 登录状态：未登录