jianwen.txt

51单片机模拟的温度控制系统中的加温控制程序,检测到温请求,并控制加温设备加热到一定的温度

#include <reg52.h>
#define Led_0 0xe0
#define Led_1 0xd0 
#define Led_2 0xb0
#define Led_3 0x70
sbit    JiaWei = P3^4; // 1 加温 0 stop
sbit    JianWei = P3^5; // 1 减温 0 stop
//unsigned char setW = 34;
unsigned char xdata *addr;
unsigned char t, Hw, Lw, tt;
unsigned char H_Bit;
unsigned char L_Bit; 
unsigned char Temperature;
unsigned char ii=0; 
unsigned char value;
unsigned char Key[5][5]={{15,3,2,-1,1},{15,6,5,-1,4},{15,9,8,-1,7},{-1,-1,-1,-1,-1},{15,15,0,-1,15}};
void Keydelay();
unsigned char Keyboard_Scanf();
void Led_Display(unsigned char i,unsigned char number);
void Control(unsigned char i);

unsigned char Key_Scanf();
void delay(int);

void main()
{    
//init keyboard
    value=0;
    H_Bit=0;
    L_Bit=0;
    P1=0xf0;  
        
    PX1=1;
    IT1=1;
    EX1=1;
    IE1=0;  
    
/*
    init AD
*/  
    IT0 = 1; //负跳触发
    EX0 = 1; //中断0开
    EA = 1; //中断总开
    addr = 0x7ffB;

    while(1)
    {
        *addr = t;
        Keydelay();//10ms
    }
}

void int0read() interrupt 0 using 2
{
    EA = 0;
 /* 读取传感器当前温度 */
    t = *addr;
/* 温度等于（t-140）*2; */
    t -= 140;
    t *= 2;
/*  16转10进制  */
    Hw = t/10;
    Lw = t - Hw*10;
    
 /* 温度控制 */
      if(Temperature > t){
         JiaWei = 1; JianWei = 0;
      }else if(Temperature < t){
        JiaWei = 0; JianWei = 1;
    }else{
        JiaWei = 0; JianWei = 0;
    }
    EA = 1;
}

void delay(int i)
{
    while(i--)
    {
        Led_Display(1,Lw);
        Led_Display(0,Hw);

        Led_Display(3,H_Bit);
        Led_Display(2,L_Bit);
    }
}

void Led_Display(unsigned char i,unsigned char  number)
{   if(i>=0&&i<5)
    if(number>=0&&number<=9)
    {
        switch(i)
        {
            case 0: P0=Led_0 | number;  break;
            case 1: P0=Led_1 | number;  break;
            case 2: P0=Led_2 | number;  break;
            case 3: P0=Led_3 | number;  break;
            default:break;
        }
    }
}

void Interrupt_Ex0(void) interrupt 2
{    
    IE1=0;   
    value=   Keyboard_Scanf();
    P1=0xf0;
    EA=1;
    IE1=0;
    
}

unsigned char Keyboard_Scanf()
{    
    unsigned char sccode,recode,cow,row,keyword,i=1;         
    if((P1&0xf0)!=0xf0) //如果列有 0 则进入
    {
        Keydelay();
        if((P1&0xf0)!=0xf0)
        {
            sccode=0xfe;    //置11111110     ；取列号 
            while( (sccode&0x10) != 0 )      //判断是否循环了3次
            {
                P1=sccode;                //P1置11111110
                if((P1&0xf0)!=0xf0)       ////P1与11111000相与看是否还是11111000
                {
                    recode=(P1&0xf0)|0x0f;      //P1与11111000相与并与00000111相或，取出行号
                    cow=(~sccode)>>1;           //列号右移一位，
                    row=(~recode)>>5;           //行号右移四位    
                    keyword=Key[cow][row];       //返回键值     
                    Control(keyword);   
                    return   keyword;                      
                }
                else 
                    sccode=(sccode<<1)|0x01;     //P1与11111000相与还是11111000，，右移一位，P1低三位依次取101、011
            }
        }
    }
return   keyword;      ///没键按下，则返回原来的值
}

void Keydelay()
{   
    int iii = 100;
    while(iii--){
        Led_Display(1,Lw);
        Led_Display(0,Hw);
        
        Led_Display(2,H_Bit);
        Led_Display(3,L_Bit);   
    }
}
void Interrupt_Ex1(void) interrupt 2
{    
    IE1=0;   
    value=   Keyboard_Scanf();
    P1=0xf0;
    EA=1;
    IE1=0;
}
void Control(unsigned char i)
{ 
    if(i>=0&&i<=9)
    {
        ii=~ii;
        if(ii==0)
          L_Bit=i; 
        if(ii==0xff)
          H_Bit=i;  
    }
    if(i==15)
    {
        Temperature=H_Bit*10+L_Bit;
    }
}