自己用dht11做的溫濕度傳感器 msp430源碼

ID:147614 · 發(fā)表于 2016-11-13 11:57

自己用msp430單片機(jī)做的溫度濕度測(cè)量，使用的是DHT11傳感器，用lcd1602顯示，可正常的顯示濕度溫度

下載：

dht11濕度溫度測(cè)量.rar (2.13 KB, 下載次數(shù): 134)

msp430源碼：

/*
* humidity.h
*
* Created on: 2016年11月5日
* Author: Administrator
*/
#ifndef HUMIDITY_H_
#define HUMIDITY_H_
#include "lcd1602.h"
#define CPU_F ((double)1000000)
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0)) //微秒延時(shí)程序
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
uchar Read_dht11_byte();
void Get_dat();
uint R_H,R_L,T_H,T_L,RH,RL,TH,TL,check1,check;
uchar H1[1],T1[1],H[1],T[1];
uchar Read_dht11_byte()
{
uchar i = 0,dat = 0,k;
P2DIR &= ~BIT1;
for(i=0;i<8;i++)
{
while(!(P2IN & BIT1));
delay_us(20);
if((P2IN&BIT1))
{
k = 1;
while((BIT1 & P2IN));
}
else
k = 0;
dat <<= 1;
dat |= k;
}
return dat;
}
void Get_dat()
{
P2DIR |= BIT1;
P2OUT &= ~BIT1;
P2OUT |= BIT1;
P2OUT &= ~BIT1;
delay_ms(18);
P2OUT |= BIT1;
delay_us(20);
P2DIR &= ~BIT1;
if(!(P2IN & BIT1))//等待DHT低電平響應(yīng)
{
while (!(P2IN & BIT1));//等待80us響應(yīng)電平過(guò)去
while((P2IN & BIT1));//等待80us的準(zhǔn)備信號(hào)過(guò)去
R_H = Read_dht11_byte();
R_L = Read_dht11_byte();
T_H = Read_dht11_byte();
T_L = Read_dht11_byte();
check1 = Read_dht11_byte();
check = (R_H+R_L+T_H+T_L);
if(check == check1)
{
RH = R_H;
RL = R_L;
TH = T_H;
TL = T_L;
}
H1[0] =(char) (0x30 + RH /10);
H[0] = (char)(0x30 + RH %10);
T1[0] =(char) (0x30 + TH /10);
T[0] = (char)(0x30 + TH %10);
LCDShowStr(0,0,"H:");
LCDShowStr(2,0,H1);
LCDShowStr(3,0,H);
LCDShowStr(4,0,"%RH");
LCDShowStr(0,1,"T:");
LCDShowStr(2,1,T1);
LCDShowStr(3,1,T);
LCDShowStr(4,1,"C");
}
}
#endif /* HUMIDITY_H_ */