基于stc89c52單片機的溫濕度采集系統
代碼：
#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
#include <intrins.h>
typedef bit BOOL ;
sbit io = P1^1 ;//(???????)
sbit bee=P1^0;
sbit rs = P2^5 ;
sbit rw = P2^6 ;
sbit ep = P2^7 ;
bit flag_300ms ;
sbit K1=P1^2;
sbit K2=P1^3;
sbit K3=P1^4;
uchar yemian=0;//???????????
uchar flat=1;
uchar data_byte;
uchar RH,RL,TH,TL;
uchar WenDu,ShiDu;//?????????????
#include "eeprom52.h"
/****************************???????****************************/
void delay(uchar ms)
{ // ????????
uchar i ;
while(ms--)
{
for(i = 0 ; i<250;i++) ;
}
}
void delay1()//???10us
{
uchar i;
i--;
i--;
i--;
i--;
i--;
i--;
}
void longdelay(uchar s) //?????
{
while(s--)
{
delay(20) ;
}
}
/******************????????浽????????eeprom??******************/
void write_eeprom()
{
SectorErase(0x2000);
byte_write(0x2000, WenDu);
byte_write(0x2001, ShiDu);
byte_write(0x2060, a_a);
}
/******************??????????????eeprom?ж?????*****************/
void read_eeprom()
{
WenDu = byte_read(0x2000);
ShiDu = byte_read(0x2001);
a_a = byte_read(0x2060);
}
/**************???????eeprom?????*****************/
void init_eeprom()
{
read_eeprom(); //???
if(a_a != 2) //?μ?????????????????eeprom
{
WenDu = 30;
ShiDu = 80;
a_a = 2;
write_eeprom();
}
}
/********************??????????*******************/
void warn() //????????
{
if(TH>=WenDu) //???????????趨???????
{
bee=0; //????
}
if(RH>=ShiDu) //???????????趨??????
{
bee=0; //????
}
if( TH<WenDu && RH<ShiDu )
{
bee=1; //??????
}
}
/************************LCD???******************************************/
BOOL lcd_bz()//????LCD?μ??
{
BOOL result ;
rs = 0 ;
rw = 1 ;
ep = 1 ;
result = (BOOL)(P0 & 0x80) ;
ep = 0 ;
return result ;
}
void write_cmd(uchar cmd)// д???
{
while(lcd_bz()) ;
rs = 0 ;
rw = 0 ;
ep = 0 ;
P0 = cmd ;
ep = 1 ;
ep = 0 ;
}
void write_addr(uchar addr)//д???
{
write_cmd(addr|0x80) ;
}
void write_byte(uchar dat)//д???
{
while(lcd_bz()) ;
rs = 1 ;
rw = 0 ;
ep = 0 ;
P0 = dat ;
ep = 1 ;
ep = 0 ;
}
void lcd_init()// ?????
{
write_cmd(0x38) ;
delay(1);
write_cmd(0x08) ;
delay(1);
write_cmd(0x01) ;
delay(1);
write_cmd(0x06) ;
delay(1);
write_cmd(0x0c) ;
delay(1);
}
void display(uchar addr, uchar q)//????????????????
{
delay(1) ;
write_addr(addr) ;
write_byte(q) ;
delay(1) ;
}
/*********************** DHT11???????***************************************/
void start()//??????
{
io=1;
delay1();
io=0;
delay(20);//>18ms
io=1;
delay1();//20-40us
delay1();
delay1();
delay1();
delay1();
}
uchar receive_byte()//??????????
{
uchar i,temp,count;
for(i=0;i<8;i++)
{
temp=0;
delay1();delay1();delay1();delay1();
if(io==1)temp=1;
count=2;
while((io)&&count++);
if(count==1)break;
data_byte<<=1;
data_byte|=temp;
}
return data_byte;
}
void receive()//????????
{
uchar T_H,T_L,R_H,R_L,check,num_check;
uchar count;
start();//??????
io=1;
if(!io)//???DHT11??????
{
while((io)&&count++);
R_H=receive_byte();
R_L=receive_byte();
T_H=receive_byte();
T_L=receive_byte();
check=receive_byte();
io=0;//???????50us
delay1();delay1();delay1();delay1();delay1();
io=1;
num_check=R_H+R_L+T_H+T_L;
if(num_check=check)
{
RH=R_H;
RL=R_L;
TH=T_H;
TL=T_L;
check=num_check;
}
}
}
void showw() // ???????
{
lcd_init(); //?????
delay(10);
display(0x05,'W');
display(0x06,'e');
display(0x07,'l');
display(0x08,'c');
display(0x09,'o');
display(0x0a,'m');
display(0x0b,'e');
delay(250); //???????
delay(250);
delay(250);
/*********************************/
/*
display(0x40,' ') ;
display(0x41,'h');
display(0x42,'e');
*/
}
/*************?????0?????????***************/
void time_init()
{
EA = 1; //?????ж?
TMOD = 0X01; //?????0???????1???????1
ET0 = 1; //???????0?ж?
TR0 = 1; //????????0???
}
void key() //???????? ???????
{
if(!K1)
{
delay(20);
if(!K1)
{
while(!K1)
;
yemian++;
flat++;
if(yemian>=3) { yemian=0; }
}
}
}
shezhi() //?????????????????
{
if(!K2)
{
delay(50);
if(!K2)
{
;
if(yemian==1)
{
WenDu+=1;
if(WenDu>99) { WenDu=99; } //????????
}
if(yemian==2)
{
ShiDu+=1;
if(ShiDu>99) { ShiDu=99; } //????????
}
write_eeprom(); //????????
}
}
if(!K3)
{
delay(50);
if(!K3)
{
;
if(yemian==1)
{
WenDu-=1; //????????
if(WenDu<1) {WenDu=1; }
}
if(yemian==2)
{
ShiDu-=1; //????????
if(ShiDu<1) { ShiDu=1; }
}
write_eeprom(); //????????
}
}
}
/***************************??????*********************************/
void main()
{
init_eeprom(); //??eeprom????
time_init(); //??????????
showw(); //???????? ??????
while(1)
{
key();
//====================yemian==0? ????????=================================
if(yemian==0)
{
if(flat==1)
{
flat=0;
lcd_init(); //?????
display(0x00,'T') ; //Temp
display(0x01,'e');
display(0x02,'m');
display(0x03,'p');
display(0x04,':');
display(0x08,0xdf); // ??
display(0x09,'C');
display(0x40,'H') ; //Humi
display(0x41,'u');
display(0x42,'m');
display(0x43,'i');
display(0x44,':');
display(0x47,'%');
display(0x48,'R');
display(0x49,'H');
display(0x0c,'T');
display(0x0d,':');
display(0x0e,WenDu/10+0x30); //???????
display(0x0f,WenDu%10+0x30);
display(0x4c,'H');
display(0x4d,':');
display(0x4e,ShiDu/10+0x30); //???????
display(0x4f,ShiDu%10+0x30);
}
if(flag_300ms == 1)
{
flag_300ms = 0;
receive();
display(0x05,TH/10+0x30); //??????
display(0x06,TH%10+0x30);
display(0x45,RH/10+0x30); //??????
display(0x46,RH%10+0x30);
warn();
}
}
//====================yemian==1 ???????===========================
if(yemian==1) //???
{
if(flat==1)
{
flat=0;
bee=1;
lcd_init(); //?????
display(0x06,'T');
display(0x07,'e');
display(0x08,'m');
display(0x09,'p');
}
shezhi();
display(0x47,WenDu/10+0x30); //???
display(0x48,WenDu%10+0x30);
}
//====================yemian==1???????==========================
if(yemian==2) //???????
{
if(flat==1)
{
flat=0;
bee=1;
lcd_init(); //?????
display(0x06,'H');
display(0x07,'u');
display(0x08,'m');
display(0x09,'i');
}
shezhi();
display(0x47,ShiDu/10+0x30); //???
display(0x48,ShiDu%10+0x30);
}
}
}
/*************?????0?ж???????***************/
void time0_int() interrupt 1
{
static uchar value;
TH0 = 0x3c;
TL0 = 0xb0; // 50ms
if(value % 6 == 0)
{
flag_300ms = 1; //300ms
value = 0;
}
}
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標籤：單片機/工控
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