单片机DS18B20数字温度计仿真与源码 LCD1602上显示 -

#include <reg52.H>
#include <intrins.H>
#include <math.h>
#include "eeprom52.h"
#define uchar unsigned char
#define uint unsigned int
uchar a[16]="perchin designed" ;
uchar b[27]="welcome to the world of mcu";
uchar dis_time_buf[16]={1,2,3,4,6,7};
static yemian=0;//（定义变量）
static unsigned char second,minute,hour;
static unsigned char day=1;
unsigned int tcount;
uchar flat=1;
uchar WenDuS,WenDuX;//报警的温度和湿度
bit flag_300ms ;
uchar TH,TL;
static zd=1;
sbit RS = P0^5;
sbit LCDEN = P0^7;
sbit rw=P0^6;
sbit BEEP=P3^6;
sbit led1=P1^0;
sbit led2=P1^1;
sbit K1=P1^2; //菜单
sbit K2=P1^4; //上
sbit K3=P1^3; //下
/*********************************************************
500us延时函数
晶振：11.0592MHz
*********************************************************/
void delay500(void)
{
uchar i;
for(i=230;i>0;i--);
}
void delayUs()
{
_nop_();
}
void delayMs(uint a)
{
uint i, j;
for(i = a; i > 0; i--)
for(j = 100; j > 0; j--);
}
/******************把数据保存到单片机内部eeprom中******************/
void write_eeprom()
{
SectorErase(0x2000);
byte_write(0x2000, WenDuS);
byte_write(0x2001, WenDuX);
byte_write(0x2060, a_a);
}
/******************把数据从单片机内部eeprom中读出来*****************/
void read_eeprom()
{
WenDuS = byte_read(0x2000);
WenDuX = byte_read(0x2001);
a_a = byte_read(0x2060);
}
/**************开机自检eeprom初始化*****************/
void init_eeprom()
{
read_eeprom(); //先读
if(a_a != 2) //新的单片机初始单片机内问eeprom
{
WenDuS = 33;
WenDuX = 18;
a_a = 2;
write_eeprom();
}
}
// lcd配置
int lcd_bz()//测试LCD忙碌状态
{
int result ;
RS = 0 ;
rw = 1 ;
LCDEN = 1 ;
result = (int)(P2 & 0x80) ;
LCDEN = 0 ;
return result ;
}
void write_cmd(uchar cmd)// 写指令
{
while(lcd_bz()) ;
RS = 0 ;
rw = 0 ;
LCDEN = 0 ;
P2 = cmd ;
LCDEN = 1 ;
LCDEN = 0 ;
}
void write_addr(uchar addr)//写地址
{
write_cmd(addr|0x80) ;
}
void write_byte(uchar dat)//写字节
{
while(lcd_bz()) ;
RS = 1 ;
rw = 0 ;
LCDEN = 0 ;
P2 = dat ;
LCDEN = 1 ;
LCDEN = 0 ;
}
void lcd_init()// 初始化
{
write_cmd(0x38) ;
delayMs(1);
write_cmd(0x08) ;
delayMs(1);
write_cmd(0x01) ;
delayMs(1);
write_cmd(0x06) ;
delayMs(1);
write_cmd(0x0c) ;
delayMs(1);
}
void writeComm(uchar comm)
{
RS = 0;
P2 = comm;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);
}
//写数据:RS=1, RW=0;
void writeData(uchar dat)
{
RS = 1;
P2 = dat;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);
}
void init()
{
rw=0;
writeComm(0x38);
writeComm(0x0c);
writeComm(0x06);
writeComm(0x01);
}
void writeString(uchar * str, uchar length)
{
uchar i;
for(i = 0; i < length; i++)
{
writeData(str[i]);
}
}
/**//*****************************DS18B20*******************************/
sbit ds = P3^7;
void dsInit()
{
unsigned int i;
ds = 0;
i = 100;
while(i>0) i--;
ds = 1;
i = 4;
while(i>0) i--;
}
void dsWait()
{
unsigned int i;
while(ds);
while(~ds);
i = 4;
while(i > 0) i--;
}
bit readBit()
{
unsigned int i;
bit b;
ds = 0;
i++;
ds = 1;
i++; i++;
b = ds;
i = 8;
while(i>0) i--;
return b;
}
unsigned char readByte()
{
unsigned int i;
unsigned char j, dat;
dat = 0;
for(i=0; i<8; i++)
{
j = readBit();
dat = (j << 7) | (dat >> 1);
}
return dat;
}
void writeByte(unsigned char dat)
{
unsigned int i;
unsigned char j;
bit b;
for(j = 0; j < 8; j++)
{
b = dat & 0x01;
dat >>= 1;
if(b)
{
ds = 0; i++; i++;
ds = 1;
i = 8; while(i>0) i--;
}
else
{
ds = 0;
i = 8; while(i>0) i--;
ds = 1;
i++; i++;
}
}
}
void sendChangeCmd()
{
dsInit();
dsWait();
delayMs(1);
writeByte(0xcc);
writeByte(0x44);
}
void sendReadCmd()
{
dsInit();
dsWait();
delayMs(1);
writeByte(0xcc);
writeByte(0xbe);
}
int getTmpValue()
{
unsigned int tmpvalue;
int value;
float t;
unsigned char low, high;
sendReadCmd();
low = readByte();
high = readByte();
tmpvalue = high;
tmpvalue <<= 8;
tmpvalue |= low;
value = tmpvalue;
\
t = value * 0.0625;
\
value = t * 100 + (value > 0 ? 0.5 : -0.5); //大于0加0.5, 小于0减0.5
return value;
}
void display(int v)
{
unsigned char count;
unsigned char datas[] = {0, 0, 0, 0, 0};
unsigned int tmp = abs(v);
datas[0] = tmp / 10000;
datas[1] = tmp % 10000 / 1000;
datas[2] = tmp % 1000 / 100;
datas[3] = tmp % 100 / 10;
datas[4] = tmp % 10;
writeComm(0xc0+3);
if(v < 0)
{
writeString("- ", 2);
}
else
{
writeString("+ ", 2);
}
if(datas[0] != 0)
{
writeData('0'+datas[0]);
}
for(count = 1; count != 5; count++)
{
writeData('0'+datas[count]);
if(count == 2)
{
writeData('.');
}
}
}
/**//*****************************DS18B20*******************************/
//屏幕初始化滚动
void dis_play()
{
uint i;
uint j;
writeComm(0x00+0x80);
for(i=0;i<16;i++)
{
writeData(a[i]);
}
writeComm(0x40+0x80);
for(i=0;i<27;i++)
{
writeData(b[i]);
}
writeComm(0x07); //每写一个数据屏幕就要右移一位，就相对于数据来说就是左移了；
delayMs(1000) ;
for(j=0;j<1;j++) //首页动态显示
{
writeComm(0x00+0x80);
for(i=0;i<16;i++)
{
writeData(a[i]);
delayMs(500); //如果不加这条延时语句的话滚动会非常快。
}
}
}
void displaysx(uchar addr, uchar q)//在某一地址上显示一字节
{
delayMs(1) ;
write_addr(addr) ;
write_byte(q) ;
delayMs(1) ;
}
/********************报警程序部分*******************/
void warn(int t) //报警函数
{
int x;
int j;
x=t/100;
if(x>=WenDuS) //检测的温度高于设定温度报警值
{
for(j=200;j>0;j--)
{
BEEP=~BEEP; //输出频率1KHz
delay500(); //延时500us
led1=~led1;
}
}
if(x<=WenDuX) //检测的温度低于设定的温度值
{
for(j=200;j>0;j--)
{
BEEP=~BEEP; //输出频率1KHz
delay500(); //延时500us
led2=~led2;
}
}
if( x<WenDuS && x>WenDuX )
{
BEEP=1; //停止报警
led1=0;
led2=0;
}
}
////*****时间********//////////
void LCD_write_char(uchar X,uchar Y,uchar Wdata)
{
uchar address;
if(Y==0)
address=0x80+X;//Y=0,表示在第一行显示，地址基数为0x80
else
address=0xc0+X;//Y非0时，表时在第二行显示，地址基数为0xC0
write_cmd(address);//写指令，设置显示初始地址
write_byte(Wdata);//写入当前字符并显示
}
void Display_sj(void)
{
if(tcount==10)
{tcount=0;
second++;
if(second==60)
{second=0;
minute++;
if(minute==60)
{minute=0;
hour++;
if(hour==24)
{hour=0;
day++;
}
if(day==7)
{
day=0;
}
}
}
}
LCD_write_char(10,0,day+'0');
//第1行显示
LCD_write_char(0,0,hour/10+'0');
LCD_write_char(1,0,hour%10+'0'); //时
LCD_write_char(2,0,':');
LCD_write_char(3,0,minute/10+1+'0');
LCD_write_char(4,0,minute%10+'0'); //分
LCD_write_char(5,0,':');
LCD_write_char(6,0,second/10+'0');
LCD_write_char(7,0,second%10+'0'); //秒
}
void main()
{
int i;//i储存转换后的温度值
sendChangeCmd();
init();
writeComm(0x80);
dis_play(); //屏幕滚动
init();
writeComm(0x80);
init_eeprom(); //读取EEPROM
led1=0;
led2=0;
while(1)
{
Display_sj();
tcount++;
delayMs(70); //温度转换和时间需要延时确定秒钟时间符合要求
writeComm(0xc0);
i = getTmpValue();
lcd_init(); //初始化
display(i); //显示温度
sendChangeCmd();
warn(i); //报警函数
//====================进入工作状态=======显示温度----时间==========================
displaysx(0x0c,'H'); //报警最高温度
displaysx(0x0d,':');
displaysx(0x0e,WenDuS/10+0x30);
displaysx(0x0f,WenDuS%10+0x30);
displaysx(0x4c,'L'); //报警最低温度
displaysx(0x4d,':');
displaysx(0x4e,WenDuX/10+0x30);
displaysx(0x4f,WenDuX%10+0x30);
//时间显示
//====================K2==0 温度报警上限设置=====进入中断======================
if(K2==0) //温度
{
led1=1;
BEEP=1;
led2=0;
delayMs(20);
while(led1==1)
{
if(K1==0) //按键响应结束
{
led1=0;
led2=0;
BEEP=1;
}
init();
writeComm(0x80);
WenDuS= byte_read(0x2000); //读取EEPROM
displaysx(0x0c,'h'); //报警最高温度
displaysx(0x0d,':');
displaysx(0x0e,WenDuS/10+0x30);
displaysx(0x0f,WenDuS%10+0x30);
delayMs(10);
if(K2==0)
{ delayMs(20);
if(K2==0)
{ WenDuS+=1;
byte_write(0x2000, WenDuS);
if(WenDuS>99) { WenDuS=99; } //温度上限报警加
}
}
if(K3==0)
{
delayMs(20);
if(K3==0)
WenDuS-=1;
byte_write(0x2000, WenDuS);
if(WenDuS<1) { WenDuS=1; } //温度下限报警加
}
byte_write(0x2000, WenDuS); //保存数据
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