Use microcontroller to make simple timing controller for electric fan

2. Schematic diagram

 

       3. Program List

       /******************************************
System name:Electronic Fan simple timing controller
Creator: w418781840 Date: 2008.7.6
System function:
******************************** ****************/
/********************************** *************
Function name: Declaration area
function description:
******************************* ***************/
#include

       /******************************************
Function name: display Function
description: Display minute time, two digits.
****************************************** ********/
void display(void)
{
uchar i,scan=1;
for(i=0;i<2;i++)
{ SEG=0xff;
   DIG=~scan;
   SEG=TAB[dis[ i]];
   delay1ms(5);
   scan<<=1;
}
}
/******************************** *************
Function name: Delay 5MS Function
description: Key debounce call.
********************** **********************/
void delay5ms(uchar x)
{ 
uchar j;
for(j=0;j

       /******************************************
Function name: initialization Function
description: Initialization of each variable.
****************************************** ****/
void init()
{ fliflag=0; //Flashing flag.
cflag=1; //Fan status flag.
zflag=0; //Rotating flag.
x=30; //Temporary storage
y=10; //Temporary storage
CLED=1;//System work.
sum=0; //Shift
start=30; //Fan rotation time
stop=10; //Pause time.
close=5; //Remaining system shutdown time
count_T0 =0; //T0, T1 related
count_T1=0;
c_count=0;
TMOD=0x11;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TH1=(65536-50000)/256 ;
TL1=(65536-50000)%256;
EA=1;
ET0=1;
ET1=1;
TR0=1; 
}
/************************ ************************
Function name: Separation function
Function description: Separately display tens and ones digits
**************** *************************************/
void disnner(void)
{ if(cflag==1)/ /1    
{ RLED=0;YLED=1;BLED=1;//The red light flashes.
   time=start; //Display the rotation time.
}
if(cflag==2)
{ RLED=1;YLED=0;BLED= 1;
   time=stop; 
}
if(cflag==3)
{ RLED=1;YLED=1;BLED=0;
   time=close; 
}
dis[0]=time/10;
dis[1]=time%10;
}
/************************************************
Function name: T0 interrupt function
function description: generated for 1 minute.
**************************************** ******/
void timer0(void)interrupt 1
{ TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
if(++count_T0==1200)//One minute.
{ count_T0=0;
   if(zflag==0) //It is 0
   { ZLED=1; //Rotate.
    if(start!=99)//The rotation time is 99, display 99, do not switch the flag. Keep rotating.
    {
     start--; //No, then countdown.
     if(start==0)
     { zflag=1;//The countdown time is up. Switch the flag.
      cflag=2;
      start=x;//Reassign the value
     }
    }
   }
   else
   { ZLED=0; //Otherwise pause.
    stop--; //Countdown counting.
    if(stop==0) 
    { cflag=1; //Time is up.
     zflag=0;
     stop=y;
    } 
   }
   if(close!= 99)//The system time is 99, 99 is displayed, and the system has been working..       
   { if(++c_count==60) //Count 60 for one minute, that is, one hour later.
    { c_count=0;
     close--; / /Do a one-hour countdown.
     if(close==0) //When the time is up, the system is powered off.
      CLED=0; //Low level is active.
    }
   }
} 
disnner();//Separate. Send display/ 
}
/* *********************************************
Function name: T1 interrupt service Function
description: Used to adjust time flashing.
***************************************** *****/
void timer1(void)interrupt 3
{ 
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
if(++count_T1==6)//Flash period 30MS
{ 
   count_T1=0;
   fliflag=~fliflag; //Switch
   if(fliflag==0) //The flag is valid.
   { 
    if(sum==1)cflag=1;//Select status flashing.
    if(sum==2)cflag=2;
    if(sum==3)cflag=3;
    disnner(); //Flashing.
    dis[ 0]=10; //Put off the extinguisher.
    dis[1]=10;  
   }
   else //Otherwise, display normally.
   { 
    RLED=1;YLED=1;BLED=1; 
    dis[0]=time/10;
    dis [1]=time%10;
   }
} 
}
/************************************** *******
Function name: Key scan function
Function description: Adjust time
************************************ ****************/
void scanner(void)
{ if(K1==0) //It is 0, indicating that a key has been pressed.
{
   delay5ms(100);//Delay 500MS .
   if(K1==0) //Still pressed. Just exited.
   {
    while(K1==0)display();//Waiting for release.
    delay5ms(2); //Eliminate jitter.
    cflag=1; // Exit display state 1.
    count_T0=0;   
    TR0=1; //Start T0
    TR1=0; //Off flash
    sum=0; //Return.
    x=start; //Temporary storage.
    y=stop; //Temporarily Save.
   }
   else
   { //Otherwise, a shift key is pressed.
    TR0=0; //Time movement stops.
    TR1=1; //Turn on flashing.
    sum++; //Shift.
    if(sum==4)
     sum =1;
   }
}

if(K2==0)
{ 
   delay5ms(2); 
   if(K2==0)
   {
    while(K2==0)display();
    delay5ms(2);
    if(sum) //There is a shift bit
    { if(sum==1)
     { 
      start++;
      if(start==61)
       start=99;
      if(start==100)
       start=30;
     }
     if(sum==2)
     { 
      stop++;
      if(stop== 61)
       stop=5;
     }
     if(sum==3)
     { 
      close++;
      if(close==9)
       close=99;
      if(close==100)
       close=1;
     }
    }
    else //No shift.
    { 
     cflag++ ; //Then display status shifting.
     if(cflag==4)
      cflag=1;
    }
   }
}
if(K3==0)
{ 
   delay5ms(2); 
   if(K3==0)
   {
    while(K3== 0)display();
    delay5ms(2);   
    if(sum==1)
    { start--;
     if(start==29)
      start=99;
     if(start==98)
      start=60;
    }
    if(sum= =2)
    { stop--;
     if(stop==4)
      stop=60;
    }
    if(sum==3)
    { close--;
     if(close==0)
      close=99;
     if(close==98)
      close=8;
    }
   }
}       
}
/******************************************
Function name: Main Function
description:
********************************************** / 
main()
{ 
init();
while(1)
{ 
   display();//Display
   scanner(); //Detect button..
}
}