基于STC12C5A60S2单片机的DHT11+LCD12864代码

1. DHT11.h
2. DHT11.c
3. LCD12864.h
4. LCD12864.c

#ifndef __DHT11_H
#define __DHT11_H#include <STC12C5A60S2.H>
#include <intrins.h>#ifndef __UDEFINE_
#define __UDEFINE_
#define uchar unsigned char
#define uint unsigned int
#endif /*__UDEFINE_*//*DHT11*/
sbit WS_data = P1^0;/*DHT11函数声明*/
void delay1s(void);
uchar WS_Start(void);
uchar WS_Read(void);
void get_temandhum(uchar* tem,uchar* hum);#endif /*__DHT11_H*/

#include "NHT11.h"
#include "LCD12864.h"
/*******************************************DHT11***************************************************/uchar WS_Start()
{unsigned char a,b,c;uint flag = 255;WS_data = 0;for(c=193;c>0;c--)for(b=114;b>0;b--)for(a=1;a>0;a--);WS_data = 1;while(WS_data == 1 && flag > 10){flag--;}		//等待DHT11的低电平if(WS_data == 0){flag = 1;for(b=1;b>0;b--)for(a=218;a>0;a--);}else{flag = 0;}return flag;
}uchar WS_Read()
{uchar a,b;uchar num = 0x00;uchar i,temp;for(i = 0; i < 8;i++){b= 255;while(WS_data == 1 && b > 0){b--;	}  	//一个while()两用 //读第一个数据，判断80us的高电平 读之后的数据判断高电平是否读完b= 255;while(WS_data == 0 && b > 0){b--;}	//50usfor(a=109;a>0;a--);     //40ustemp = WS_data;num = (num << 1)|temp;	}return num;
}void get_temandhum(uchar* tem,uchar* hum)
{uchar ERR[] = "ReaERR";uchar RIT[] = "ReaCOR";uchar LTEM,HTEM,LHUM,HHUM,Check;Check = WS_Start();if(Check == 1){HHUM = WS_Read();LHUM = WS_Read();HTEM = WS_Read();LTEM = WS_Read();Check = WS_Read();if(Check == HHUM + LHUM + HTEM +LTEM){*tem = HTEM;*hum = HHUM;LCD_Pos(1,0);for(Check = 0; Check < 6;Check++){LCD_WriteDat(RIT[Check]);	}}else{LCD_Pos(1,0);for(Check = 0; Check < 6;Check++){LCD_WriteDat(ERR[Check]);	}		}		}else{}
}
//延时1s函数与LCD的冲突，单独用需要添加
/***************************************************************************************************/

#ifndef __LCD12864_H
#define __LCD12864_H#include <STC12C5A60S2.H>
#include <intrins.h>#ifndef __UDEFINE_
#define __UDEFINE_
#define uchar unsigned char
#define uint unsigned int
#endif /*__UDEFINE_*//*LCD12864*/
#define LCD_data P0
sbit EN = P3^4;
sbit RS = P3^5;
sbit RW = P3^6;
sbit PSB = P3^7;/*LCD12864函数声明*/
void delay1ms(void);
void delay1s(void);
void LCD_Init(void);
void LCD_WriteCmd(uchar cmd);
void LCD_WriteDat(uchar dat);
void LCD_Pos(uchar x,uchar y);
void LCD_Test(void);#endif /*__LCD12864_H*/

#include "LCD12864.h"/*******************************************LCD12864************************************************/
void LCD_Test()
{uchar i,j;uchar TestStr[] = "                测试                ";LCD_Init();LCD_Pos(1,0);while(1){LCD_WriteCmd(0x0c);for(i = 0;i < 20;i+=2){LCD_Pos(1,0);for(j = i;j< 16+i;j++)LCD_WriteDat(TestStr[j]);delay1s();}}
}void LCD_Pos(uchar x,uchar y)
{uchar pos;if(1 == x){x = 0x80;}else if(2 == x){x = 0x90;}else if(3 == x){x = 0x88;}else if(4 == x){x = 0x98;}pos = x+y;LCD_WriteCmd(pos);		
}void LCD_Init()
{PSB = 1;/*清除显示*/  //将DDRAM填满"20H",并且设定DDRAM的地址计数器(AC)到"00H"LCD_WriteCmd(0x01);delay1ms();/*设置功能*/	// 4/8数据 AND 是否打开拓展功能LCD_WriteCmd(0x30);delay1ms();/*显示状态开关*/	//不知道干啥的LCD_WriteCmd(0x0C);delay1ms();	
}void delay1s(void)   //误差 -0.000000000099us
{unsigned char a,b,c;for(c=217;c>0;c--)for(b=171;b>0;b--)for(a=73;a>0;a--);
}void delay1ms(void)   //误差 -0.018084490741us
{unsigned char a,b;for(b=21;b>0;b--)for(a=130;a>0;a--);_nop_();  //if Keil,require use intrins.h
}void LCD_WriteCmd(uchar cmd)
{RW = 0;RS = 0;EN = 0;delay1ms();LCD_data = cmd;delay1ms();EN = 1;delay1ms();EN = 0;
}void LCD_WriteDat(uchar dat)
{RW = 0;RS = 1;EN = 0;delay1ms();LCD_data = dat;delay1ms();EN = 1;delay1ms();EN = 0;
}
/***************************************************************************************************/