#include "reg52.h"
typedef unsigned int u16; //对系统默认数据类型进行重定义
typedef unsigned char u8;
#define SMG_A_DP_PORT P0 //使用宏定义数码管段码口
//定义独立按键控制脚
sbit KEY1=P3^1;
sbit KEY2=P3^0;
sbit KEY3=P3^2;
sbit KEY4=P3^3;
//定义LED1控制脚
sbit LED1=P2^0;
//定义数码管位选信号控制脚
sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;
//使用宏定义独立按键按下的键值
#define KEY1_PRESS 1
#define KEY2_PRESS 2
#define KEY3_PRESS 3
#define KEY4_PRESS 4
#define KEY_UNPRESS 0
//共阴极数码管显示0~F的段码数据
u8 gsmg_code[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,128};
void delay_10us(u16 ten_us)
{
while(ten_us--);
}
//计时器函数//
void int_display(u16 value)
{
u8 i;
u8 showtime =0;
u8 V[8]={0};
u8 count=0;
while(value>0)
{
V[count]=value%10;
count++;
value/=10;
}
while(showtime<100)
{
for(i=0;i<count;i++)
{
switch(7-i)//位选
{
case 0: LSC=1;LSB=1;LSA=1;break;
case 1: LSC=1;LSB=1;LSA=0;break;
case 2: LSC=1;LSB=0;LSA=1;break;
case 3: LSC=1;LSB=0;LSA=0;break;
case 4: LSC=0;LSB=1;LSA=1;break;
case 5: LSC=0;LSB=1;LSA=0;break;
case 6: LSC=0;LSB=0;LSA=1;break;
case 7: LSC=0;LSB=0;LSA=0;break;
}
if(i==1)
{
SMG_A_DP_PORT=gsmg_code[V[i]]|0x80;
}
else
SMG_A_DP_PORT=gsmg_code[V[i]];//传送段选数据
delay_10us(100);//延时一段时间,等待显示稳定
}
showtime++;
}
}
//按键函数//
u8 key_scan(u8 mode)
{
static u8 key=1;
if(mode)key=1;//连续扫描按键
if(key==1&&(KEY1==0||KEY2==0||KEY3==0||KEY4==0))//任意按键按下
{
delay_10us(1000);//消抖
key=0;
if(KEY1==0)
return KEY1_PRESS;
else if(KEY2==0)
return KEY2_PRESS;
else if(KEY3==0)
return KEY3_PRESS;
else if(KEY4==0)
return KEY4_PRESS;
}
else if(KEY1==1&&KEY2==1&&KEY3==1&&KEY4==1) //无按键按下
{
key=1;
}
return KEY_UNPRESS;
}
void main()
{
u16 index=0;
u8 key=0;
int beepOpen=0;
while(1)
{
key=key_scan(0);
if(key==KEY2_PRESS)//检测按键K2是否按下
{
while(1)
{
int_display (index);
index++;
}
}
if(key==KEY3_PRESS)//检测按键K3是否按下
{
}
if(key==KEY4_PRESS)//检测按键K4是否按下
{
}
}
}
想做一个不用定时器的计数器,2是启动,3是停止,4是归零,只弄了启动,后面的没思路了