DHT11在1602上显示

/11.0592MHz单片机STC89C52RC;DHT11在LCD1602显示#include # include #define uchar unsigned char#define uint unsigned int/*端口定义*/sbit RS=P26;/1602RS端口sbit RW=P25;/1602RW端口sbit E=P27;/1602E端口/LCD1602数据口接P0sbit IO=P20;/dht11数据口/*变量定义*/uint timeout;/溢出uchar RH_H;/温度整数位uchar RH_L;/ 温度小数位uchar T_H;/ 湿度整数位uchar T_L;/ 湿度小数位uchar Cheakdata;/校验位/*/*延时1ms*/void Delay1ms(uchar c)/1ms延时uchar i, j;for(;c0;c-) _nop_(); i = 2; j = 199; do while (-j); while (-i); /*延时10us*/void Delay10us(void)/10us延时uchar i;i = 2;while (-i);/*1602忙检测函数*/uchar LCD1602_BUSY()/读状态uchar state; RS=0;RW=1;P0=0xFF;E=1;Delay1ms(1);E=0;return state;/*1602写数据函数带忙检测*/void LCD1602_WRITE_DATA_BUSY(uchar databuf)while(LCD1602_BUSY()&0x80)=0x80); RS=1;RW=0;P0=databuf;E=1;E=0;/*1602写指令函数*/void LCD1602_WRITE_COM(uchar combuf) RS=0;RW=0;P0=combuf;E=1;E=0;/*1602写指令函数带忙检测*/void LCD1602_WRITE_COM_BUSY(uchar combuf)while(LCD1602_BUSY()&0x80)=0x80); RS=0;RW=0;P0=combuf;E=1;E=0;/*1602初始化函数*/void LCD1602_init(void) Delay1ms(15);/15msLCD1602_WRITE_COM(0x38);Delay1ms(5);/5msLCD1602_WRITE_COM(0x38);Delay1ms(5);/5msLCD1602_WRITE_COM(0x38);LCD1602_WRITE_COM_BUSY(0x38);LCD1602_WRITE_COM_BUSY(0x08);LCD1602_WRITE_COM_BUSY(0x01);LCD1602_WRITE_COM_BUSY(0x06);LCD1602_WRITE_COM_BUSY(0x0C);/*DHT11读字节*/uchar ReadByte(void)uchar i;uchar buf=0;for(i=0;i8;i+)IO=1;timeout=0;while(IO=0)&(timeout+)500); Delay10us();Delay10us();Delay10us();_nop_();/31us buf=buf1; if(IO=1) buf=buf|0x01; timeout=0;while(IO=1)&(timeout+)500); return buf;/*DHT11读温湿度*/uchar ReadRH(void)IO=0; Delay1ms(20);/20msIO=1;Delay10us();Delay10us();Delay10us();Delay10us();Delay10us();/50usif(IO=0)timeout=0;while(IO=0)&(timeout+)500);timeout=0;while(IO=1)&(timeout+)99) RH_H=0; if(T_H50) T_H=0; LCD1602_DISP(0,0,R); LCD1602_DISP(1,0,H); LCD1602_DISP(2,0,:); LCD1602_DISP(3,0,RH_H/10+0); LCD1602_DISP(4,0,RH_H%10+0); LCD1602_DISP(5,0,%); LCD1602_DISP(0,1,T); LCD1602_DISP(1,1,:); LC