为什么我的单片机按键松手检测没有效果？这个代码我在另外一个项目中是可以用的，...

ID:602220 · 发表于 2020-1-15 17:37

#include<reg52.h>
#include"key.h"

#define uchar unsigned char
#define uint unsigned int

/*******************************************************************************
* 函数名       : key
* 函数功能    : 扫描四个独立按键并消抖
* 输入       : 无
* 输出       : key_can
* 说明       :
*******************************************************************************/
void key()
{
//key_new 通过消抖后得到的按键新值， key_old 按键旧值，key_value 按键标志位，用于消抖
if(key_new ==0) //检测按键是否已经松开
{
  if((key_io & 0x0f) == 0x0f)  //如果按键全为1，则按键与全部松开
key_value ++;
else
key_value = 0;
  if(key_value >=5)
  {
key_value = 0;
key_new = 1;
  }
}
else
{
  if((key_io & 0x0f) != 0x0f) //用于检测是否有按键按下，若消抖后确定存在则key_new 清零等待松手信号
key_value ++;
  else
key_value = 0;
  if(key_value >= 5)
  {
key_value = 0;
key_new = 0;
  }
}
  key_can = 0;
      if((key_new == 0) && (key_old == 1))//若原本是旧按键信号是松手，新按键信号是有按键按下则判断是那个键被按下
      {
            switch(key_io & 0x0f)
            {
                     case 0x0e: key_can = 1; break;       //得到按键值
                     case 0x0d: key_can = 2; break;       //得到按键值
                     case 0x0b: key_can = 3; break;
         case 0x07: key_can = 4; break;//得到按键值
            }
      }
      key_old = key_new;
}

********************************************************************************************************

#include<reg52.h>
#include<string.h>
#include"key.h"
#include"LCD1602.h"
#include"main.h"

void main(void)
{
unsigned char  j;
unsigned char  time[4]={'0','0','0','0'};
unsigned char weight[4]={'0','0','X','X'};

LcdInit();
Init_time0();

while(1)
{
  switch(flag_window)
  {
case 0x00 :

strcpy(first_line," Smart Bin ");
strcpy(second_line," Please  Select ");
Lcd_first_line(first_line);
Lcd_second_line(second_line) ;

switch(key_can)
{
case 1:
flag_window = 0x01;break;
case 2:
   flag_window = 0x02;break;
case 3:
flag_window = 0x03;break;
case 4:flag_full=1;break;
default :flag_window = 0x00  ;break;
}

break;

case 0x01:

strcpy(first_line,"Open Speed:    ");
strcpy(second_line,"+  -  Sure  Back");
Lcd_first_line(first_line);
Lcd_second_line(second_line);
j=1;

while(j)
{
LcdWriteCom(0x8C);
LcdWriteData(open_v_bf);

switch(key_can)
{
   case 1:if(open_v_bf<'9')LcdWriteData(++open_v_bf);
   flag_window = 0x01;break;
   case 2:
   if(open_v_bf>'0')LcdWriteData(--open_v_bf);
   flag_window = 0x01;break;
   case 3:
   open_v = (open_v_bf-30);LcdWriteCom(0x8E);LcdWriteData('O');LcdWriteCom(0x8F);LcdWriteData('K');
   flag_window = 0x01;break;
   case 4:flag_window = 0x00;j=0;break;
   default :flag_window = 0x01 ; break;
}

}

break;

case 0x02:
strcpy(first_line,"Band up Standard");
strcpy(second_line," H  T  W Back ");
Lcd_first_line(first_line);
Lcd_second_line(second_line);

switch(key_can)
  {
case 1:
flag_window = 0x04;break;
case 2:
flag_window = 0x05;break;
case 3:
flag_window = 0x06;break;
case 4:flag_window = 0x00;break;
default :flag_window = 0x02 ; break;
  }


  break;
  case 0x03 :
  strcpy(first_line,"Envelop Strength");
  strcpy(second_line," H  M  L Back ");
  Lcd_first_line(first_line);
  Lcd_second_line(second_line);

switch(key_can)
{
case 1:rub_he =10 ;flag_window = 0x03;LcdWriteCom(0xCE);LcdWriteData('O');LcdWriteCom(0xCF);LcdWriteData('K');Delay();
break;
case 2:rub_he =20 ;flag_window = 0x03;LcdWriteCom(0xCE);LcdWriteData('O');LcdWriteCom(0xCF);LcdWriteData('K');Delay();
break;
case 3:rub_he =30 ;flag_window = 0x03;LcdWriteCom(0xCE);LcdWriteData('O');LcdWriteCom(0xCF);LcdWriteData('K');Delay();
break;
case 4:flag_window = 0x00;break;
default :flag_window = 0x03 ; break;
}


  break;

case 0x04 :
  strcpy(first_line,"Garbage Height  ");
  strcpy(second_line,"Max Med Min Back");
  Lcd_first_line(first_line);
  Lcd_second_line(second_line);


  switch(key_can)
  {
  case 1:rub_he =10 ;flag_window = 0x04;LcdWriteCom(0x8E);LcdWriteData('O');LcdWriteCom(0x8F);LcdWriteData('K');Delay();
break;
  case 2:rub_he =20 ;flag_window = 0x04;LcdWriteCom(0x8E);LcdWriteData('O');LcdWriteCom(0x8F);LcdWriteData('K');Delay();
break;
  case 3:rub_he =30 ;flag_window = 0x04;LcdWriteCom(0x8E);LcdWriteData('O');LcdWriteCom(0x8F);LcdWriteData('K');Delay();
break;
  case 4:flag_window = 0x02;break;
  default :flag_window = 0x04 ; break;
  }


  break;

  case 0x05 :
  strcpy(first_line,"Hour:  Min:    ");
  strcpy(second_line," +  -  OK Back");
  Lcd_first_line(first_line);
  Lcd_second_line(second_line);

  for(j=0;j<4&&j>=0;)
  {
LcdWriteCom(0x85);LcdWriteData(time[0]);
LcdWriteCom(0x86);LcdWriteData(time[1]);
LcdWriteCom(0x8B);LcdWriteData(time[2]);
LcdWriteCom(0x8C);LcdWriteData(time[3]);

switch(j)
{
case 0:LcdWriteCom(0x85);break;
case 1:LcdWriteCom(0x86);break;
case 2:LcdWriteCom(0x8B);break;
case 3:LcdWriteCom(0x8C);break;
default:break;
}

switch(key_can)
{
case 1:
if(j!=2){if(time[j]<'9')++time[j];}else{if(time[j]<'6')++time[j];}
flag_window = 0x05;break;
case 2:if(time[j]>'0')--time[j];
flag_window = 0x05;break;
case 3:time_set[j]=time[j];j++;
flag_window = 0x05;break;
case 4:j--;
flag_window = 0x05;break;
default :flag_window = 0x05; break;
}

  }
if(j==4)
{
LcdWriteCom(0x8E);LcdWriteData('O');LcdWriteCom(0x8F);LcdWriteData('K');
}
else
{
LcdWriteCom(0x8E);LcdWriteData('C');LcdWriteCom(0x8F);LcdWriteData('C');
time_set[0]=time_set[1]=time_set[2]=time_set[3]='0';
}
  Delay();
hour_set =  (time_set[0]-30)*10+(time_set[1]-30);
min_set =  (time_set[2]-30)*10+(time_set[3]-30);
flag_window = 0x02; break;

  case 0x06:
  strcpy(first_line," . <Weight< . ");
  strcpy(second_line,"+  -  Sure  Back");
  Lcd_first_line(first_line);
  Lcd_second_line(second_line);

  for(j=0;j<4&&j>=0;)
  {
LcdWriteCom(0x80);LcdWriteData(weight[0]);
LcdWriteCom(0x82);LcdWriteData(weight[1]);
LcdWriteCom(0x8B);LcdWriteData(weight[2]);
LcdWriteCom(0x8D);LcdWriteData(weight[3]);

  switch(j)
  {
case 0:LcdWriteCom(0x80);break;
case 1:LcdWriteCom(0x82);break;
case 2:LcdWriteCom(0x8B);break;
case 3:LcdWriteCom(0x8D);break;
default:break;
  }

  switch(key_can)
{
  case 1:if(weight[j]<'9')LcdWriteData(++weight[j]);else LcdWriteData(weight[j]='X');
  flag_window = 0x06;break;
  case 2:if(weight[j]>'0'&&weight[j]!='X')LcdWriteData(--weight[j]); if(weight[j]=='X') LcdWriteData(weight[j]='9');
  flag_window = 0x06;break;
  case 3:weight_set[j]=weight[j];j++;
  flag_window = 0x06;break;
  case 4:j--;
  flag_window = 0x06;break;
  default :flag_window = 0x06; break;
  }

  }
if(j==4)
{
   LcdWriteCom(0x8E);LcdWriteData('O');LcdWriteCom(0x8F);LcdWriteData('K');
   if(weight_set[0]!='X'&&weight_set[1]!='X')
   weight_min = (weight_set[0]-30)+(weight_set[1]-30)/10;
else
   weight_min = 10000;
if(weight_set[2]!='X'&&weight_set[3]!='X')
   weight_max = (weight_set[2]-30)+(weight_set[3]-30)/10;
else
   weight_max = 10000;
}
else
{
LcdWriteCom(0x8E);LcdWriteData('C');LcdWriteCom(0x8F);LcdWriteData('C');
weight_set[0]=weight_set[1] ='0';weight_set[2]=weight_set[3] = 'X';
   weight_min = 0.0;
weight_max = 10000;
}

  Delay();
flag_window = 0x02;break;
default :flag_window = 0x00 ; break;
  }
}
}
void Delay() // 12M晶振1s延时
{
unsigned char h, i, j, k;
for (h = 5; h > 0; h--)
for (i = 4; i > 0; i--)
for (j = 116; j > 0; j--)
for (k = 214; k > 0; k--);
}

void Init_time0(void)
{
TMOD &= 0XF0;
TMOD |= 0X01;
TH0 = 0XD8; //5MS定时
TL0 = 0XF0;
TR0 = 1;
ET0 = 1;
EA =  1;
}

void Interrupt_time0(void) interrupt 1
{
TH0 = 0XD8; //5MS定时
TL0 = 0XF0;
key();
}