独立键盘检测 proteus仿真小实验
实验:用数码管的前两位显示一个十进制数,变化范围为00-59,开始时显示00。每按下S2键一次数值加一;每按下S3键一次数值减一;每按下S4键一次数值归零;按下S5键一次,利用定时器功能使数值开始自动每秒加一,再次按下S5键数值停止自动加一,保持显示原数。
程序:
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5c,0x79,0x71};
void delayms(uint x);
uchar numt0,num;//num0为中断次数
uint i,j;
void display(uchar numdis)
{
uchar shi,ge;
shi=numdis/10;
ge=numdis%10;
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delayms(500);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delayms(500);
}
void delayms(uint x)
{
for(i=x;i>0;i--)
for(j=110;j>0;j--);
}
void init()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
}
void keyscan()
{
if(key1==0)
{
delayms(40);
if(key1==0)
{
num++;
if(num==60)
num=0;
while(!key1);
}
}
if(key2==0)
{
delayms(40);
if(key2==0)
{
if(num==0)
num=60;
num--;
while(!key2);
}
}
if(key3==0)
{
delayms(40);
if(key3==0)
{
num=0;
while(!key3);
}
}
if(key4==0)
{
delayms(40);
if(key4==0)
{
while(!key4);
TR0=~TR0;
}
}
}
void main()
{
init();
while(1)
{
keyscan();
display(num);
}
}
void T0_time() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
numt0++;
if(numt0==20)
{
numt0=0;
num++;
if(num==60)
num=0;
}
}
程序:
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5c,0x79,0x71};
void delayms(uint x);
uchar numt0,num;//num0为中断次数
uint i,j;
void display(uchar numdis)
{
uchar shi,ge;
shi=numdis/10;
ge=numdis%10;
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delayms(500);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delayms(500);
}
void delayms(uint x)
{
for(i=x;i>0;i--)
for(j=110;j>0;j--);
}
void init()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
}
void keyscan()
{
if(key1==0)
{
delayms(40);
if(key1==0)
{
num++;
if(num==60)
num=0;
while(!key1);
}
}
if(key2==0)
{
delayms(40);
if(key2==0)
{
if(num==0)
num=60;
num--;
while(!key2);
}
}
if(key3==0)
{
delayms(40);
if(key3==0)
{
num=0;
while(!key3);
}
}
if(key4==0)
{
delayms(40);
if(key4==0)
{
while(!key4);
TR0=~TR0;
}
}
}
void main()
{
init();
while(1)
{
keyscan();
display(num);
}
}
void T0_time() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
numt0++;
if(numt0==20)
{
numt0=0;
num++;
if(num==60)
num=0;
}
}