单片机pid温度控制系统程序设计 -

#include<reg51.h>
#include<intrins.h>
#include<absacc.h>
#define uchar unsigned char
#define uint unsigned int
#define BUSY 0x80 //1cd忙检測标志
#define DATAPORT P0 //定义P0口为LCD通讯端口
#define PLAYE_ADDR XBYTE[0XBFFF] //语音报警地址
sbit RED_ALARM=P1^0; //红色指示灯
sbit WRITE_ALARM=P1^1; // 白色指示灯
sbit GREEN_ALARM=P1^2; //録色指示灯
sbit BLUE_ALARM = P1^3;
sbit P1_4 = P1^4; //时钟调整
sbit P1_5 = P1^5; //时钟加
sbit P1_6=P1^6; //时钟减
sbit DQ=P1^7; //定义ds18b20通信端口
sbit LCM_RS=P2^0; //数据／命令端
sbit LCM_RW=P2^1; //读／写选择端
sbit LCM_EN=P2^2;
sbit sda=P2^3; //I0口定义
sbit scl=P2^4; //LCD使能信号
sbit ad_busy=P3^2; //adc中断方式接口
sbit RECLED_EOC=P3^5; //ISD1420放音结東查询标志
sbit OUT=P3^7;
uchar ad_data; //ad采样值存储
uchar seconde; //定义并初始化时钟变量
uchar minite;
uchar hour;
uchar mstcnt=0;
uchar temp1,temp2,temp; //温度显示变量
uchar t,set;
uchar K;
bit ON_OFF=0;
bit outflag;
bit write=0;
uchar code str0[]={"--- : : --- "};
uchar code str1[]={"SET: C SA: . C"};
void delay_LCM(uint); //LCD延时子程序
void initLCM(void); //LCD初始化子程序
void lcd_wait(void); //LCD检测忙子程序
void WriteCommandLCM(uchar WCLCM,uchar BusyC);//写指令到1CM子函数
void WriteDataLCM(uchar WDLCM); //写数据到1CM子函数
void DisplayOneChar(uchar X,uchar Y,uchar DData);//显示指定坐标的一个字符子函数
void DisplayListChar(uchar X,uchar Y,uchar code *DData);//显示指定坐标的串字符子函数
void init_timer0(void); //定时器初始化
void displayfun1(void);
void displayfun2(void);
void displayfun3(void);
void displayfun4(void);
void keyscan(void ); //键盘扫描子程序
void set_adj(void);
void inc_key(void);
void dec_key(void);
void delay_18B20(unsigned int i);
void Init_DS18B20(void);
uchar ReadOneChar( void);
void WriteOneChar(unsigned char dat);
void ReadTemperature(void);
void ad0809(void);
void playalarm(void);
//**********延时K＊1ms，12.000mhz＊＊＊＊＊＊＊/
void delay_LCM(uint k)
{
uint i,j;
for(i=0; i<k; i++)
{
for(j=0;j<60;j++)
{;}
}
}
//＊＊＊＊＊写指令到LCM子函数＊＊＊＊＊＊＊＊//
void WriteCommandLCM(uchar WCLCM,uchar BusyC)
{
if(BusyC)lcd_wait();
DATAPORT=WCLCM;
LCM_RS=0; //选中指令寄存器
LCM_RW=0; //写模式
LCM_EN=1;
_nop_();
_nop_();
_nop_();
LCM_EN=0;
}
//＊＊＊＊＊写数据到LCM子函数＊＊＊＊＊＊＊＊/／
void WriteDataLcm(uchar WDLCM)
{
lcd_wait(); //检测忙信号
DATAPORT=WDLCM;
LCM_RS=1; //选中数据寄存器
LCM_RW=0; //写模式
LCM_EN = 1;
_nop_();
_nop_();
_nop_();
LCM_EN=0;
}
//＊＊＊＊＊＊＊1cm内部等待函数＊＊＊＊＊＊＊＊／
void lcd_wait(void)
{
DATAPORT=0xff;
LCM_EN=1;
LCM_RS=0;
LCM_RW=1;
_nop_();
while(DATAPORT&BUSY)
{
LCM_EN=0;
_nop_();
_nop_();
LCM_EN=1;
_nop_();
_nop_();
}
LCM_EN=0;
}
//＊＊＊＊＊＊＊LCM初始化子函数＊＊＊＊＊＊＊／
void initLCM()
{
DATAPORT=0;
delay_LCM(15);
WriteCommandLCM(0x38,0);//三次显示模式设置，不检测忙信号
delay_LCM(5);
WriteCommandLCM(0x38,0);
delay_LCM(5);
WriteCommandLCM(0x38, 0);
delay_LCM(5);
WriteCommandLCM(0x38,1);//8bit数据传送,2行显示,5＊7字型,检测忙信号
WriteCommandLCM(0x08,1);//关闭显示,检测忙信号
WriteCommandLCM(0x01,1);//清屏,检測忙信号
WriteCommandLCM(0x06,1);//显示光标右移设置,检测忙信号
WriteCommandLCM(0x0c,1);//显示屏打开,光标不显示,不闪烁,检测忙信号
}
//＊＊＊＊常显示指定坐标的一个字符子函数＊＊＊＊＊＊//
void DisplayOneChar(uchar X,uchar Y,uchar DData)
{
Y &= 1;
X &= 15;
if(Y)X |= 0x40; //若y为1(显示第二行),地址码＋0X40
X |= 0x80; //指令码为地址码＋0X80
WriteCommandLCM(X,0);
WriteDataLCM(DData);
}
//＊＊＊＊显示指定坐标的一串字符子函数＊＊＊＊＊//
void DisplayListChar(uchar X,uchar Y,uchar code *DData)
{
uchar ListLength = 0;
Y &= 0x01;
X &= 0x0f;
while(X < 16)
{
DisplayOneChar(X,Y,DData[ListLength]);
ListLength++;
X++;
}
}
//＊＊＊＊＊ds18b20延迟子函数(晶振12MHz)＊＊＊＊/
void delay_18B20(unsigned int i)
{
while(i--);
}
//＊＊＊＊＊ds18b20初始化函数＊＊＊＊＊//
void Init_DS18B20(void)
{
unsigned char x = 0;
DQ = 1; //DQ复位
delay_18B20(8); //稍做延时
DQ = 0; //单片机将DQ拉低
delay_18B20(80); //精确延时大于480us
DQ = 1; //拉高总线
delay_18B20(14);
x = DQ; //稍做延时后如果x＝0则初始化成功x＝1则初始化失败
delay_18B20(20);
}
//＊＊＊＊＊＊＊ds18b20读一个字节＊＊＊＊＊＊＊/
unsigned char ReadOneChar(void)
{
uchar i = 0;
uchar dat = 0;
for (i = 8; i>0; i--)
{
DQ = 0; //给脉冲信号
dat >>= 1;
DQ = 1; //给脉冲信号
if(DQ)
dat |= 0x80;
delay_18B20(4);
}
return( dat);
}
//＊＊＊＊ds18b20写一个字节＊＊＊＊/
void WriteOneChar(uchar dat)
{
unsigned char i = 0;
for(i = 8;i>0;i--)
{
DQ = 0;
DQ = dat&0x0l;
delay_18B20(5);
DQ = 1;
dat >>= 1;
}
}
//＊＊＊＊读取ds18b20当前温度＊＊＊＊＊/
void ReadTemperature(void)
{
unsigned char a = 0;
unsigned char b = 0;
unsigned char t = 0;
Init_DS18B20();
WriteOneChar(0xCC); //跳过读序号列号的操作
WriteOneChar(0x44); //启动温度转换
delay_18B20(100); //this message is wery important
Init_DS18B20();
WriteOneChar(0xCC); //跳过读序号列号的操作
WriteOneChar(0xBE); //读取温度寄存器等(共可读9个寄存器)前两个就是温度
delay_18B20(100);
a = ReadOneChar(); //读取温度值低位
b = ReadOneChar(); //读取温度值高位
temp1 = b<<4;
temp1 += (a&0xf0)>>4;
temp2 = a&0x0f;
temp =((b*256+a)>>4);//当前采集温度值除16得实际温度值
}
//＊＊＊＊液品显示子函数1正常显示＊＊＊＊＊//
void displayfunl(void)
{
WriteCommandLCM(0x0c,1); //显示屏打开,光标不显示,不闪烁,检测忙信号
DisplayListChar(0,0,str0);
DisplayListChar(0,1,str1);
DisplayOneChar(3,0,hour/10+0x30);//液晶上显示小时
DisplayOneChar(4,0,hour%10+0x30);
DisplayOneChar(6,0,minite/10+0x30),//液晶上显示分
DisplayOneChar(7,0,minite%10+0x30);
DisplayOneChar(9,0,seconde/10+0x30);//液晶上显示秒
DisplayOneChar(10,0,seconde%10+0x30);
DisplayOneChar(4,1,K/10+0x30); //液品上显示设定的温度
DisplayOneChar(5,1,K%10+0x30);
DisplayOneChar(11,1,temp1/10+0x30);//液晶上显示测得的温度
DisplayOneChar(12,1,temp1%10+0x30);
DisplayOneChar(14,1,temp2/10+0x30);
if(ON_OFF == 0) //若温控标志为0
{
DisplayOneChar(14,0,0x4f); //液晶上显示不控温的标志
DisplayOneChar(15,0,0x46);
}
else
{
DisplayOneChar(14,0,0x4f); //液晶上显示控温的标志
DisplayOneChar(15,0,0x4e);
if(outflag == 1)
DisplayOneChar(0,0,0x7c);
else
DisplayOneChar(0,0,0xef);
}
}
//＊＊＊＊＊液晶最示子函数2＊＊＊＊＊//
void displayfun2(void)
{
WriteCommandLCM(0x0c,1); //显示屏打开,光标不显示,不闪烁,检測忙信号
DisplayListChar(0,0,str0);
DisplayListChar(0,1,str1);
DisplayOneChar(6,0,minite/10+0x30);
DisplayOneChar(7,0,minite%10+0x30);
DisplayOneChar(9,0,seconde/10+0x30);
DisplayOneChar(10,0,seconde%10+0x30);
DisplayOneChar(4,1,K/10+0x30);
DisplayOneChar(5,1,K%10+0x30);
DisplayOneChar(11,1,temp1/10+0x30);
DisplayOneChar(12,1,temp1%10+0x30);
DisplayOneChar(14,1,temp2/10+0x30);
WriteCommandLCM(0x0f,1); //显示打开,光标显示,闪烁,检测忙信号
DisplayOneChar(3,0,hour/10+0x30);
DisplayOneChar(4,0,hour%10+0x30);
}
//＊＊＊＊＊液晶显示子函数3＊＊＊＊//
void displayfun3(void)
{
WriteCommandLCM(0x0c,1); //显示屏打开,光标不显示,不闪烁,检测忙信号
DisplayListChar(0,0,str0);
DisplayListChar(0,1,str1);
DisplayOneChar(3,0,hour/10+0x30);
DisplayOneChar(4,0,hour%10+0x30);
DisplayOneChar(9,0,seconde/10+0x30);
DisplayOneChar (10,0,seconde%10+0x30);
DisplayOneChar(4,1,K/10+0x30);
DisplayOneChar(5,1,K%10+0x30);
DisplayOneChar(11,1,temp1/10+0x30);
DisplayOneChar(12,1,temp1%10+0x30);
DisplayOneChar(14,1,temp2/10+0x30);
WriteCommandLCM(0x0f,1);//显示屏打开,光标显示,闪烁,检测忙信号
DisplayOneChar(6,0,minite/10+0x30);
DisplayOneChar(7,0,minite%10+0x30);
}
//＊＊＊＊＊液晶显示子函数4＊＊＊＊＊＊//
void displayfun4(void)
{
WriteCommandLCM(0x0c,1);//显示屏打开,光标不显示,不闪烁,检测忙信号
DisplayListChar(0,0,str0);
DisplayListChar(0,1,str1);
DisplayOneChar(3,0,hour/10+0x30);
DisplayOneChar(4,0,hour%10+0x30);
DisplayOneChar(6,0,minite/10+0x30);
DisplayOneChar(7,0,minite%10+0x30);
DisplayOneChar(9,0,seconde/10+0x30);
DisplayOneChar(10,0,seconde%10+0x30);
DisplayOneChar(11,1,temp1/10+0x30);
DisplayOneChar(12,1,temp1%10+0x30);
DisplayOneChar(14,1,temp2/10+0x30);
WriteCommandLCM(0x0f,1);//显示屏打开,光标显示,闪烁,检测忙信号
DisplayOneChar(4,1,K/10+0x30);
DisplayOneChar(5,1,K%10+0x30);
}
//＊＊＊＊＊键盘扫描子函数＊＊＊＊＊//
void keyscan(void)
{
uchar xx; //局部变量
P1 = 0xef;
if( P1 != 0xff)
{
delay_LCM(50);
if(P1 != 0xff)
{
xx = P1;
switch (xx) //根据按键状态,调用不同的子函数
{
case 0xfe:set_adj();
break;
case 0xfd:inc_key();
break;
case 0xfb:dec_key();
break;
case 0xf7:{delay_LCM(150);ON_OFF=!ON_OFF;while(!BLUE_ALARM);}
break;
default: break;
}
}
}
}
//＊＊＊＊＊设定工作模式子函数＊＊＊＊＊//
void set_adj(void)
{
delay_LCM(100);
set++;
if(set >= 4)set = 0;
while(!RED_ALARM);
}
//＊＊＊＊＊按键加法子函数＊＊＊＊＊＊//
void inc_key(void)
{
delay_LCM(150);
switch(set)
{
case 0: if(P1 == 0xf7)
{delay_LCM(150);ON_OFF = !ON_OFF;}
break;
case 1: hour++; if(hour >= 23)hour = 23;
break;
case 2: minite++; if(minite >= 59)minite = 59;
break;
case 3:K++;if(K >= 99)K = 99;
break;
default: break;
}
while(!WRITE_ALARM);
}
//＊＊＊＊＊按键减法子函数＊＊＊＊＊＊//
void dec_key( void)
{
delay_LCM(150);
switch(set)
{
case 0:if(P1 == 0xf7)
{delay_LCM(150);ON_OFF=!ON_OFF;}
break;
case 1:hour--;
if(hour <= 0)hour = 0;
break;
case 2: minite--;
if(minite <= 0)minite = 0;
break;
case 3: K--; if(K <= 1)K = 1;
break;
default: break;
}
while(!GREEN_ALARM);
}
//＊＊＊＊＊＊24C02读写驱动程序＊＊＊＊＊//
void delay1(uchar x)
{
uint i;
for(i = 0;i < x;i++);
}
void flash()
{ ; ; }
void x24c02_init()//24c02初始化子程序
{
scl = 1;
flash();
sda = 1;
flash();
}
void start() //启动I2C总线
{
sda = 1;
flash();
scl = 1;
flash();
sda = 0;
flash();
scl = 0;
flash();
}
void stop() //停止I2C总线
{
sda = 0;
flash();
scl = 1;
flash();
sda = 1;
flash();
}
void writex(uchar j)//写一个字节
{
uchar i,temp;
temp = j;
for (i = 0; i < 8; i++)
{
temp = temp<<1;
scl = 0;
flash();
sda = CY;
flash();
scl = 1;
flash();
}
scl = 0;
flash();
sda = 1;
flash();
}
uchar readx()//读一个字节
{
uchar i,j,k = 0;
scl = 0;
flash();
sda = 1;
for(i = 0;i < 8;i++)
{
flash();
scl = 1;
flash();
if(sda == 1)j = 1;
else j = 0;
k = (k<<1)|j;
scl = 0;
}
flash();
return (k);
}
void clock() //I2C总线时钟
{
uchar i = 0;
scl = 1,
flash();
while((sda == 1)&&(i<255))i++;
scl = 0;
flash();
}
//////从24c02的地址 address中读取一个字节数据////
uchar x24c02_read(uchar address)
{
uchar i;
start();
writex(0xa0);
clock();
writex(address);
clock();
start();
writex(0xa1);
clock();
i = readx();
stop();
delay1(10);
return (i);
}
////向24c02的address地址中写入一字节数据info////
void x24c02_write(uchar address,uchar info)
{
EA = 0;
start();
writex(0xa0);
clock();
writex(address);
clock();
writex(info);
clock();
stop();
EA = 1;
delay1(50);
}
//＊＊＊＊＊定时器t0初始化＊＊＊＊＊//
void init_timer0(void)
{
TMOD = 0x01; //time0为定时器,方式1
TH0 = 0x3c; //于预置计数初值
TL0 = 0xb0;
EA = 1;
ET0 = 1;
TR0 = 1;
}
//＊＊＊＊＊定时器t0中断子函数＊＊＊＊＊//
void timer0(void) interrupt 1 using 0 //定时器0方式1,50ms中断一次
{
TH0 = 0x3c;
TL0 = 0xb0;
mstcnt++;
if(mstcnt >= 20 )
{seconde++;write = 1; mstcnt = 0;}
if(seconde >= 60)
{minite++; seconde = 0;}
if(minite >= 60 )
{hour++; minite = 0;}
if(hour >= 24 )
{hour = 0;}
keyscan(); //按键扫描
}
//＊＊＊＊＊＊the main funtion＊＊＊＊＊＊/
void main(void)
{
P1 = 0xff; //初始化p1口,全设为1
x24c02_init(); //初始化24002
K = x24c02_read(2); //读出保存的数据于K
seconde = x24c02_read(4);
minite = x24c02_read(6);
hour = x24c02_read(8);
delay_LCM(500); //延时500ms启动
initLCM(); //LCD初始化
init_timer0(); //时钟定时器0初始化
Init_DS18B20(); //DS18B20初始化
DisplayListChar(0,0,str0);
DisplayListChar(0,1,str1);
while (1)
{
keyscan(); //按键扫描
ReadTemperature(); //温度采集
switch(set) //LCD根据工作模式显示
{
case 0: displayfun1();delay_LCM(1000); break;//正常工作显
case 1: displayfun2();delay_LCM(1000); break;//调整时显示
case 2: displayfun3();delay_LCM(1000); break;//调整分显示
case 3: displayfun4();delay_LCM(1000); break;//温度设定
default: break;
}
keyscan(); //相当于延时
if(ON_OFF == 1) //若温控标志位1,控制L．AMP动作
{
if(temp1 >= K+1)
{outflag = 1;OUT = 0;}
if(temp1<K)
{
delay_LCM(1000);
if(temp1<K)
{outflag = 0;OUT = 1;}
}
}
else{outflag = 0; OUT = 1;}
if(write == 1) //判断计时器是否计时一秒
{
write = 0; //清零
x24c02_write(8,hour); //在24c02的地址2中写入数据hour
delay_LCM(11);
x24c02_write(6,minite);
delay_LCM(11);
x24c02_write(4,seconde);
delay_LCM(11);
x24c02_write(2,K);
}
}
}

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