DHT11.rar_DHT11_cc2530_cc2530 dht11_温湿度传感器

#include <ioCC2530.h> typedef unsigned char uchar; typedef unsigned int uint; #define DATA_PIN P0_7 //温湿度定义 uchar ucharFLAG,uchartemp; uchar shidu_shi,shidu_ge,wendu_shi,wendu_ge=4; uchar ucharT_data_H,ucharT_data_L,ucharRH_data_H,ucharRH_data_L,ucharcheckdata; uchar ucharT_data_H_temp,ucharT_data_L_temp,ucharRH_data_H_temp,ucharRH_data_L_temp,ucharcheckdata_temp; uchar ucharcomdata; //延时函数 void Delay_us() //1 us延时 { asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); } void Delay_10us() //10 us延时 { Delay_us(); Delay_us(); Delay_us(); Delay_us(); Delay_us(); Delay_us(); Delay_us(); Delay_us(); Delay_us(); Delay_us(); } void Delay_ms(uint Time)//n ms延时 { unsigned char i; while(Time--) { for(i=0;i<100;i++) Delay_10us(); } } //温湿度传感 void COM(void) // 温湿写入 { uchar i; for(i=0;i<8;i++) { ucharFLAG=2; while((!DATA_PIN)&&ucharFLAG++); Delay_10us(); Delay_10us(); Delay_10us(); uchartemp=0; if(DATA_PIN)uchartemp=1; ucharFLAG=2; while((DATA_PIN)&&ucharFLAG++); if(ucharFLAG==1)break; ucharcomdata<<=1; ucharcomdata|=uchartemp; } } void DHT11(void) //温湿传感启动 { DATA_PIN=0; Delay_ms(19); //>18MS DATA_PIN=1; P0DIR &= ~0x80; //重新配置IO口方向 Delay_10us(); Delay_10us(); Delay_10us(); Delay_10us(); if(!DATA_PIN) { ucharFLAG=2; while((!DATA_PIN)&&ucharFLAG++); ucharFLAG=2; while((DATA_PIN)&&ucharFLAG++); COM(); ucharRH_data_H_temp=ucharcomdata; COM(); ucharRH_data_L_temp=ucharcomdata; COM(); ucharT_data_H_temp=ucharcomdata; COM(); ucharT_data_L_temp=ucharcomdata; COM(); ucharcheckdata_temp=ucharcomdata; DATA_PIN=1; uchartemp=(ucharT_data_H_temp+ucharT_data_L_temp+ucharRH_data_H_temp+ucharRH_data_L_temp); if(uchartemp==ucharcheckdata_temp) { ucharRH_data_H=ucharRH_data_H_temp; ucharRH_data_L=ucharRH_data_L_temp; ucharT_data_H=ucharT_data_H_temp; ucharT_data_L=ucharT_data_L_temp; ucharcheckdata=ucharcheckdata_temp; } wendu_shi=ucharT_data_H/10; wendu_ge=ucharT_data_H%10; shidu_shi=ucharRH_data_H/10; shidu_ge=ucharRH_data_H%10; } else //没用成功读取，返回0 { wendu_shi=0; wendu_ge=0; shidu_shi=0; shidu_ge=0; } P0DIR |= 0x80; //IO口需要重新配置 }