First, design ideas:
Start supplying power to the microcontroller through the manual key. Until the power indicator LED4 is on, the microcontroller is running and relay 2 is working to power the microcontroller. By setting the working time of the relay 2 by pressing the key button, the automatic power-off of the system can be realized. By setting the working time of the relay 1, the intermittent rotation of the fan can be realized to achieve energy saving.
1. Display section: Press the key to switch the display during fan rotation time, pause time, and remaining time of system shutdown. Digital display two-digit, "minutes" travel time, where the remaining time of the system shutdown is "hours" travel time, the LED is red, yellow, blue, and the corresponding fan rotation, pause, and the remaining time of the system turn off.
2. Button section:
l K1 is the time adjustment shift key. When this key is pressed, the digit flashes and the corresponding light flashes. Switch between fan rotation time, pause time, and system
l K2 is the plus one and the state switch display key, when there is K1 press, add 1 to the time. Otherwise, switch the display between fan rotation time, pause time, and system.
l K3 is a minus 1 and an alternate key. When K1 is pressed, the time is incremented by 1. Otherwise, it is invalid.
3. Relay part:
l Relay 1 controls the fan's power cable to allow the fan to rotate and momentarily.
l Relay 2 controls the power supply of the SCM system to achieve system timing closure.
Second, the schematic
Third, the program list
/*********************************************
System Name: Fan Simple Controller
The key person: w418781840 Date: 2008.7.6
System functions:
**********************************************/
/*********************************************
Function Name: Declaration Area
Functional description:
**********************************************/
#include
#define uchar unsigned char
#define uint unsigned int
#define SEG P0 //Select digital channels.
#define DIG P2 //Digital Tube Selection
Uchar dis[2]; //Digital Drive Group
Uchar code TAB[]={ 0xC0, 0xF9, 0xA4, 0xB0, 0x99, //0-4 co-positive.
0x92, 0x82, 0xF8, 0x80, 0x90, 0xff}; //5-9, extinguishing
Uchar start,stop,close,sum,time; //variables
Uchar fliflag,cflag,zflag,x,y;//flags
Uint count_T0,count_T1,c_count; //count variable
Sbit K1=P3^7; //function shift key
Sbit K2=P3^2; //Add a key and switch shift key.
Sbit K3=P3^3; // subtract one.
Sbit RLED=P2^2; //Red light, table fan rotation.
Sbit YLED=P2^3; //Yellow light, table fan suspended
Sbit BLED=P2^4; //blue light, table system status
Sbit CLED=P2^6; //fan control bit
Sbit ZLED=P2^7; //System operation control bit
/*********************************************
Function Name: Delayed 1MS Function
Function description: display call.
**********************************************/
Void delay1ms(uchar x)
{
Uchar i,j;
For(i=0;i for(j=0;j<120;j++);
}
/*********************************************
Function Name: Display Functions
Function description: When the split points are displayed, two digits are displayed.
**********************************************/
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
Function description: Press the key to shake the call.
**********************************************/
Void delay5ms(uchar x)
{
Uchar j;
For(j=0;j display();
}
/*********************************************
Function Name: Initialization function
Function description: Initialize each variable.
**********************************************/
Void init()
{ fliflag=0;// blinking flag.
Cflag=1; //fan status flag.
Zflag=0; // Turn the flag.
x=30; //Scratch
y=10; //Scratch
CLED=1;//System work.
Sum=0; // shift
Start=30; //fan rotation time
Stop=10; // pause time.
Close=5; //The remaining time of system shutdown
count_T0=0; //T0, T1 correlation
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: Separate display ten digits, one bit
**********************************************/
Void disnner(void)
{ if(cflag==1)//1
{ RLED=0;YLED=1;BLED=1;//Red flashes.
Time=start; //Display 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: Generate 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) // is 0
{ZLED=1; //rotate.
If(start!=99)//Rotation time is 99, display 99, do not switch logo. Always rotate.
{
Start--; //No, countdown.
If(start==0)
{zflag=1;//Reverse time to. Switch flag.
Cflag=2;
Start=x;//reassignment
}
}
}
Else
{ ZLED=0; //otherwise pause.
Stop--; // Countdown count.
If(stop==0)
{cflag=1; //Time is up.
Zflag=0;
Stop=y;
}
}
If(close!=99)// system time is 99, show 99, the system has been working..
{if(++c_count==60) // Count 60 for one minute, ie one hour later.
{ c_count=0;
Close--; //make an hour countdown.
If(close==0) //time expires, system power off.
CLED=0; //Active low.
}
}
}
Disnner();//separate. send display/
}
/*********************************************
Function Name: T1 interrupt service function
Function description: Adjust time flashing.
**********************************************/
Void timer1(void)interrupt 3
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
If(++count_T1==6)//Flashing Period 30MS
{
count_T1=0;
Fliflag=~fliflag; //Switch
If(fliflag==0) //The flag is valid.
{
If(sum==1)cflag=1;//Selection state flicker.
If(sum==2)cflag=2;
If(sum==3)cflag=3;
Disnner(); //Use flash.
Dis[0]=10; // put the extinguishment symbol.
Dis[1]=10;
}
Else / Otherwise, normal display.
{
RLED=1;YLED=1;BLED=1;
Dis[0]=time/10;
Dis[1]=time%10;
}
}
}
/*********************************************
Function Name: Key Scan Function
Function description: Adjust the time
**********************************************/
Void scanner(void)
{if(K1==0) // is 0, the table has a key press.
{
Delay5ms(100);//Delay 500MS.
If(K1==0) //also press. Just exit.
{
While(K1==0)display();//wait for release.
Delay5ms(2); //debounce.
Cflag=1; //exit display state 1.
count_T0=0;
TR0=1; //Start T0
TR1=0; //Off blinks
Sum=0; // reset.
x=start; //Scratch.
y=stop; //Scratch.
}
Else
{ // Otherwise, there is a shift key press.
TR0=0; //Time stops moving.
TR1=1; //On flashes.
Sum++; //Shift.
If(sum==4)
Sum=1;
}
}
If (K2==0)
{
Delay5ms(2);
If (K2==0)
{
While(K2==0)display();
Delay5ms(2);
If(sum) //with shift
{ 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 // did not shift.
{
Cflag++; //The display state is shifted.
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
Functional description:
**********************************************/
Main()
{
Init();
While(1)
{
Display();//display
Scanner(); //Test button:
}
}
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