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1、/* 基于51单片机SHT11温湿度传感器检测程序*/#include #include /* 宏定义*/#define uint unsigned int#define uchar unsigned char#define noACK 0#define ACK 1 #define STATUS_REG_W 0x06 #define STATUS_REG_R 0x07 #define MEASURE_TEMP 0x03 #define MEASURE_HUMI 0x05 #define RESET 0x1e enum TEMP,HUMI;typedef union /定义共用同类型 unsig
2、ned int i;float f; value;/* 位定义*/sbit lcdrs=P20;sbit lcdrw=P21;sbit lcden=P22;sbit SCK = P10;sbit DATA = P11;/* 变量定义*/uchar table2=SHT11 温湿度检测;uchar table3=温度为： ;uchar table4=湿度为：;uchar table5=.;uchar wendu6; uchar shidu6; /* 1ms延时函数*/void delay(int z) int x,y;for(x=z;x0;x-)for(y=125;y0;y-);/* 50us延
3、时函数*/void delay_50us(uint t)uint j;for(;t0;t-)for(j=19;j0;j-);/* 50ms延时函数*/void delay_50ms(uint t)uint j;for(;t0;t-)for(j=6245;j0;j-);/* 12864液晶写指令*/void write_12864com(uchar com)lcdrs=0;lcdrw=0;delay_50us(1);P0=com;lcden=1;delay_50us(10);lcden=0;delay_50us(2);/* 12864液晶写数据*/void write_dat(uchar dat
4、)lcdrs=1;lcdrw=0;delay_50us(1);P0=dat;lcden=1;delay_50us(10);lcden=0;delay_50us(2);/* 12864液晶初始化*/void init12864lcd(void)delay_50ms(2);write_12864com(0x30);delay_50us(4);write_12864com(0x30);delay_50us(4);write_12864com(0x0f);delay_50us(4);write_12864com(0x01);delay_50us(240);write_12864com(0x06);de
5、lay_50us(10);write_12864com(0x0c);delay_50us(10);/* 12864液晶显示函数*/void display1(void)uchar i;write_12864com(0x80);for(i=0;i18;i+) write_dat(table2i); delay_50us(1);/* 12864液晶显示函数*/void display2(void)uchar i;write_12864com(0x90);for(i=0;i18;i+) write_dat(table3i); delay_50us(1);/* 12864液晶显示函数*/void di
6、splay3(void)uchar i;write_12864com(0x88);for(i=0;i8;i+) write_dat(table4i); delay_50us(1);/* 12864液晶显示函数*/void displaywendu(void)uchar i;write_12864com(0x94);for(i=0;i3;i+) write_dat(wendui); delay_50us(1);for(i=0;i1;i+) write_dat(table5i); delay_50us(1);for(i=4;i5;i+) write_dat(wendui); delay_50us(1);/* 12864液晶显示函数*/void displayshidu(void)uchar i;write_12864com(0x8C);for(i=0;i3;i+) write_dat(shidui); delay_50us(1);for(i=0;i1;i+) write_dat(table5i); delay_50us(1);for(i=4;i0;i=1) /高位为1，循环右移 if (i&value) DATA=1;
