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標題: 溫度傳感器 [打印本頁]

作者: adwszxc1 時間: 2021-1-5 23:05
標題: 溫度傳感器

WSD.C(溫濕度主程序)

晶振12.0MHZ,MCU是AT89S51

DHT11數字溫濕度傳感器數碼管顯示程序。

P2^2接DATA

8個共陰數碼管接法：段選

P1.7->A;P1.5->B;P1.1->C;P1.3->D;P1.4->E;P1.6->F;P1.0->G;P1.2->DP

位選

P0.0->7;P0.1->6;P0.2->5;P0.3->4;P0.4->3;P0.5->2;P0.6->1;P0.7->0*/

#include<reg52.h>

#include <intrins.h>

#include"smg.h"

#include"head.h"

unsigned char str[]={0,0,0,0,0,0,0,0};

sbit TRH = P2^2;//溫濕度傳感器DHT11數據接入

uint j=0;

uintTH_data,TL_data,RH_data,RL_data,CK_data;

uintTH_temp,TL_temp,RH_temp,RL_temp,CK_temp;

uint com_data,untemp,temp;

char receive()

{

uint i;

com_data=0;

for(i=0;i<=7;i++)

{

while(!TRH);

delay_10us();

if(TRH)

{

temp=1;

while(TRH);

}

else

temp=0;

com_data<<=1;

com_data|=temp;

}

return(com_data);

}

void read_TRH()

TRH=1;

delay_5us();

//主機拉低18ms

TRH=0;

delay_180ms();

TRH=1;

//DATA總線由上拉電阻拉高主機延時20us

delay_10us();

TRH=1;

//判斷DHT11是否有低電平響應信號如不響應則跳出，響應則向下運行

if(!TRH)

{

//判斷DHT11發出 80us 的低電平響應信號是否結束

while(!TRH);

//判斷從機是否發出 80us 的高電平，如發出則進入數據接收狀態 while(TRH);

//數據接收狀態

RH_temp = receive();

RL_temp = receive();

TH_temp = receive();

TL_temp = receive();

CK_temp = receive();

TRH=1;

//數據校驗

untemp=(RH_temp+RL_temp+TH_temp+TL_temp);

if(untemp==CK_temp)

{

RH_data = RH_temp;

RL_data = RL_temp;

TH_data = TH_temp;

TL_data = TL_temp;

CK_data = CK_temp;

}

//濕度整數部分

str[0] =RH_data/10;

str[1] =RH_data%10;

//濕度小數部分

str[2] = RL_data/10 ;

//溫度整數部分

str[3] = TH_data/10;

str[4] = TH_data%10;

//溫度小數部分

str[5] = TL_data/10;

//主函數

//TH,TL,RH,RL分別代表溫濕度的整數和小數部分

void main()

{

delay_3s();

read_TRH();

for(;j<10000;j++)

disp(str);

}

smg.c(數碼管顯示C程序)

#include<reg52.h>

#include"smg.h"

#include"head.h"

//后加的8個數碼管的段碼和位碼。

sbit smg_dw1=P0^0;

sbit smg_dw2=P0^1;

sbit smg_dw3=P0^2;

sbit smg_dw4=P0^3;

sbit smg_dw5=P0^4;

sbit smg_dw6=P0^5;

sbit smg_dw7=P0^6;

sbit smg_dw8=P0^7;

uchar

smg_du[]={0xfa,0x22,0xb9,0xab,0x63,0xcb,0xdb,0xa2,0xfb,0xeb,0xf3,0x5b,0xd8,0x3b,0xd9,0xd1,0x04};

void disp(uchar *p)

{

P1=smg_du[*p];

smg_dw1=0;

delay_17us(1);

smg_dw1=1;

delay_17us(1);

p++;

P1=smg_du[*p];

smg_dw2=0;

delay_17us(1);

smg_dw2=1;

delay_17us(1);

p++;

P1=smg_du[*p];

smg_dw3=0;

delay_17us(1);

smg_dw3=1;

delay_17us(1);

p++;

P1=smg_du[*p];

smg_dw4=0;

delay_17us(1);

smg_dw4=1;

delay_17us(1);

p++;

P1=smg_du[*p];

smg_dw5=0;

delay_17us(1);

smg_dw5=1;

delay_17us(1);

p++;

P1=smg_du[*p];

smg_dw6=0;

delay_17us(1);

smg_dw6=1;

delay_17us(1);

p++;

P1=smg_du[*p];

smg_dw7=0;

delay_17us(1);

smg_dw7=1;

delay_17us(1);

p++;

P1=smg_du[*p];

smg_dw8=0;

delay_17us(1);

smg_dw8=1;

delay_17us(1);

}

time.c(時間函數)

#include<reg52.h>

#include<intrins.h>

#include"head.h"

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