单片机单个按钮(状态机）编程

ID:164604 · 发表于 2018-4-6 17:42

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^7;
//uchar mode;
//uint count;
void keyscan();
void main()
{
   P3=0xff;
while(1)
{
;
//delay();
keyscan();
//inst();
;
  }
}
void keyscan()
{
   static uchar mode=0;
static long  count=0;//2»¶¨òåÎa¾2ì¬±äá¿»áèçoÎ¡
switch(mode)
{
   case 0:
   {
   if(key1==0)
   {
mode=1;
   }
   }
break;
case 1:
{
   count++;
   if(count>50)
   {
   count=0;
   if(key1)
   {
mode=0;
      }
else
{
mode=2;
      }
   }
}
   break;
   case 2:
   {
   count++;
   if(count>10000)
   {
   count=0;
   mode=4;
   }
   }
break;
case 4:
{
if(key1)
{
P1=0x01;
mode=0;
   }
else
{
P1=0x2;
mode=5;
   }
}
break;
case 5:
{
if(key1)
{
mode=0;
   }
}
  }

}

ID:164604 · 发表于 2018-4-6 17:58

短按P1输出1，长按P1输出2

ID:66287 · 发表于 2018-7-26 16:18

写的不错，感谢分享

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单片机单个按钮(状态机）编程

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