//****************************************************************//
//單片機 : STC89C52RC
// 功能 ：串口發送溫濕度數據 晶振 11.0592M 波特率 9600
//硬件連接： P2.0口為通訊口連接DHT11,DHT11的電源和地連接單片機的電源和地，單片機串口加MAX232連接電腦
//****************************************************************//
#include <reg51.h>
#include <intrins.h>
#include <absacc.h>
typedef unsigned char U8; /* defined for unsigned 8-bits integer variable 無符號8位整型變量 */
typedef unsigned int U16; /* defined for unsigned 16-bits integer variable 無符號16位整型變量 */
#define lcd_H
#include <reg51.h>
#define HIGH 1
#define LOW 0
#define TRUE 1
#define FALSE 0
#define ZERO 0
#define MSB 0x80
#define LSB 0x01
//********液晶屏部分 ****
#define LINE1 0
#define LINE2 1
#define LINE1_HEAD 0x80
#define LINE2_HEAD 0xC0
#define DATA_MODE 0x38
#define OPEN_SCREEN 0x0C
#define DISPLAY_ADDRESS 0x80
#define CLEARSCREEN LCD_en_com(0x01)
#define LCDIO P1
sbit LCD1602_RS = P2^4; //定義端口
sbit LCD1602_RW = P2^3;
sbit LCD1602_EN = P2^2;
//----------------------------------------------//
//----------------IO口定義區--------------------//
//----------------------------------------------//
sbit P2_0 = P2^0 ;
sbit SPK=P0^7;
int t1,t2,ss;
//----------------------------------------------//
//----------------定義區--------------------//
//----------------------------------------------//
U8 U8FLAG;
U8 U8count,U8temp;
U8 U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;
U8 U8T_data_H_temp,U8T_data_L_temp,U8RH_data_H_temp,U8RH_data_L_temp,U8checkdata_temp;
U8 U8comdata;
unsigned char str1[]={'s','h','i','d','u',':'};
unsigned char str2[]={'w','e','n','d','u',':'};
LCD_init();
void Delay(U16 j)
{ U8 i;
for(;j>0;j--)
{
for(i=0;i<27;i++);
}
}
void Delay_10us(void)
{
U8 i;
i--;
i--;
i--;
i--;
i--;
i--;
}
void COM(void)
{
U8 i;
for(i=0;i<8;i++)
{
U8FLAG=2;
while((!P2_0)&&U8FLAG++);
Delay_10us();
Delay_10us();
Delay_10us();
U8temp=0;
if(P2_0)U8temp=1;
U8FLAG=2;
while((P2_0)&&U8FLAG++);
//超時則跳出for循環
if(U8FLAG==1)break;
//判斷數據位是0還是1
// 如果高電平高過預定0高電平值則數據位為 1
U8comdata<<=1;
U8comdata|=U8temp; //0
}//rof
}
void LCD_Read_BF(void)
{
unsigned char read=0;
LCD1602_RS=LOW;
LCD1602_RW=HIGH;
LCD1602_EN=HIGH;
LCDIO=0XFF;
read=LCDIO;}
void LCD_en_com(unsigned char command)//寫指令
{
LCD_Read_BF();
LCD1602_RS=LOW;
LCD1602_RW=LOW;
LCD1602_EN=HIGH;
LCDIO=command;
LCD1602_EN=LOW;
}
void LCD_en_dat(unsigned char dat)//寫數據
{
LCD_Read_BF();
LCD1602_RS=HIGH;
LCD1602_RW=LOW;
LCD1602_EN=HIGH;
LCDIO=dat;
LCD1602_EN=LOW;
}
void LCD_set_xy(unsigned char x,unsigned char y) //寫入地址函數
{
unsigned char address;
if(y==LINE1)
address=LINE1_HEAD+x;
else address=LINE2_HEAD+x;
LCD_en_com(address);
}
void LCD_write_char(unsigned char x,unsigned char y,unsigned char dat)//寫入字符函數
{
LCD_set_xy(x,y);
LCD_en_dat(dat);
}
void LCD_write_string(unsigned char x,unsigned char y,unsigned char *s)//寫入字符串函數
{
LCD_set_xy(x,y);
while(*s)
{
LCDIO=*s;
LCD_en_dat(*s);
s++;
}
}
void LCD_Init(void) //初始化函數
{
LCD_en_com(0x38); /*顯示模式設置*/
Delay(5);
LCD_en_com(0x38);
Delay(5);
LCD_en_com(0x38);
Delay(5);
LCD_en_com(0x38);
LCD_en_com(0x08); /*顯示關閉*/
LCD_en_com(0x01); /*顯示清屏*/
LCD_en_com(0x06); /*顯示光標移動設置*/
Delay(5);
LCD_en_com(0x0C); /*顯示開及光標設置*/
}
//--------------------------------
//-----濕度讀取子程序 ------------
//--------------------------------
//----以下變量均為全局變量--------
//----溫度高8位== U8T_data_H------
//----溫度低8位== U8T_data_L------
//----濕度高8位== U8RH_data_H-----
//----濕度低8位== U8RH_data_L-----
//----校驗 8位 == U8checkdata-----
//----調用相關子程序如下----------
//---- Delay();, Delay_10us();,COM();
//--------------------------------
void RH(void)
{
//主機拉低18ms
P2_0=0;
Delay(180);
P2_0=1;
//總線由上拉電阻拉高 主機延時20us
Delay_10us();
Delay_10us();
Delay_10us();
Delay_10us();
//主機設為輸入 判斷從機響應信號
P2_0=1;
//判斷從機是否有低電平響應信號 如不響應則跳出，響應則向下運行
if(!P2_0) //T !
{
U8FLAG=2;
//判斷從機是否發出 80us 的低電平響應信號是否結束
while((!P2_0)&&U8FLAG++);
U8FLAG=2;
//判斷從機是否發出 80us 的高電平，如發出則進入數據接收狀態
while((P2_0)&&U8FLAG++);
//數據接收狀態
COM();
U8RH_data_H_temp=U8comdata;
COM();
U8RH_data_L_temp=U8comdata;
COM();
U8T_data_H_temp=U8comdata;
COM();
U8T_data_L_temp=U8comdata;
COM();
U8checkdata_temp=U8comdata;
P2_0=1;
//數據校驗
U8temp=(U8T_data_H_temp+U8T_data_L_temp+U8RH_data_H_temp+U8RH_data_L_temp);
if(U8temp==U8checkdata_temp)
{
U8RH_data_H=U8RH_data_H_temp;
U8RH_data_L=U8RH_data_L_temp;
U8T_data_H=U8T_data_H_temp;
U8T_data_L=U8T_data_L_temp;
U8checkdata=U8checkdata_temp;
}
//濕度整數部分
str1[6] = (char)(0X30+U8RH_data_H/10);
str1[7] = (char)(0X30+U8RH_data_H%10);
//濕度小數部分
str1[9] = (char)(0X30+U8RH_data_L/10);
//溫度整數部分
str2[6] = (char)(0X30+U8T_data_H/10);
str2[7] = (char)(0X30+U8T_data_H%10);
//溫度小數部分
str2[9] = (char)(0X30+U8T_data_L/10);
t1=(int)(0X30+U8T_data_H/10);
t2=(int)(0X30+U8T_data_H%10);
ss=t1*10+t2;
}
}
void xianshi(void)
{
LCD_write_char(0x00,0,'s');
LCD_write_char(0x01,0,'h');
LCD_write_char(0x02,0,'i');
LCD_write_char(0x03,0,'d');
LCD_write_char(0x04,0,'u');
LCD_write_char(0x05,0,':');
LCD_write_char(0x06,0,str1[6]);
LCD_write_char(0x07,0,str1[7]);
LCD_write_char(0x08,0,'.');
LCD_write_char(0x09,0,str1[9]);
LCD_write_char(0x0B,0,'%');
LCD_write_char(0x0C,0,'R');
LCD_write_char(0x0D,0,'H');
LCD_write_char(0x00,1,'w');
LCD_write_char(0x01,1,'e');
LCD_write_char(0x02,1,'n');
LCD_write_char(0x03,1,'d');
LCD_write_char(0x04,1,'u');
LCD_write_char(0x05,1,':');
LCD_write_char(0x06,1,str2[6]);
LCD_write_char(0x07,1,str2[7]);
LCD_write_char(0x08,1,'.');
LCD_write_char(0x09,1,str1[9]);
LCD_write_char(0x0B,1,0x27);
LCD_write_char(0x0C,1,'C');
}
//**蜂鳴器**//
void laba()
{
unsigned int i;
if(ss>554||ss<500)
{
for(i=0;i<200;i++)//喇叭發聲的時間循環，改變大小可以改變發聲時間長短
{
Delay(160); //參數決定發聲的頻率，估算值，可以自行更改參數并
SPK=!SPK;
}
SPK=1;
Delay(60000);
}
//喇叭停止工作，間歇的時間，可更改
}
//----------------------------------------------
//main()功能描述: AT89C51 11.0592MHz 串口發
//送溫濕度數據,波特率 9600
//----------------------------------------------
void main()
{
LCD_init();
Delay(4);
while(1)
{
//調用溫濕度讀取子程序
RH();
xianshi();
laba();
}
}
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