空气质量检测仪C程序

1、空气质量检测仪C程序 程序代码#include<reg52.h>#include<intrins.h>#define uchar unsigned char#define uint unsigned int#define Data P0 /数据端口/*1602管脚定义*/sbit RS=P26;sbit RW=P25;sbit E=P27;/*AD管脚定义*/sbit STA=P30;sbit OE=P31;sbit EOC=P32;sbit CLK=P33;/*按键管脚定义*/sbit key_U=P20;sbit key_D=P21;

2、sbit key_L=P22;sbit key_R=P23;sbit key_S=P24;/*报警用管脚*/sbit beep=P34;sbit led1=P35;sbit led2=P36;unsigned char num=0;/记录设定键按下次数unsigned char k_flag=0;/记录设置键按下次数(用于调用)unsigned char wei=0;/光标位置unsigned char c_num=0;/记录切换键按下次数unsigned char c_flag=0;/记录切换键按下次数(用于调用)unsigned char voc_ad;/AD读取数据unsigned ch

3、ar flag;/DHT11函数用到/*/sbit DHT=P37;uchar WEN1="wen:16.00-28.00" /温度第一行数据uchar WEN2=" 00.00 " /温度第二行数据uchar SHI1="shi:30.00-70.00" /湿度第一行数据uchar SHI2=" 00.00 " /湿度第二行数据uchar VOC1="voc:0.00-2.70 " /湿度第一行数据uchar VO

4、C2=" 0.00 " /湿度第二行数据unsigned char shiZ,shiX,wenZ,wenX,check;unsigned char tr_shiZ,tr_shiX,tr_wenZ,tr_wenX;/*延时*/void delay_1ms(uint x)uchar i;while(x-)for(i=0;i<120;i+);void delay_10us()unsigned char i;i-;i-;i-;i-;i-;i-;void DelayUs(unsigned char us)/-延时函数unsigned char uscnt

5、;uscnt=us>>1; /*12MHz频率*/while(-uscnt);/*1602显示*/*写命令*/void lcd_write_com(uchar c) delay_1ms(5);/操作前短暂延时，保证信号稳定E=0;RS=0;RW=0;_nop_();E=1;Data=c;E=0;/*写数据*/void lcd_write_dat(uchar c) delay_1ms(5); /操作前短暂延时，保证信号稳定E=0;RS=1;RW=0;_nop_();E=1;Data=c;E=0;RS=0;/*LCD初始化*/void lcd_init() delay_

6、1ms(15);lcd_write_com(0x38); /display modelcd_write_com(0x38); /display modelcd_write_com(0x38); /display modelcd_write_com(0x06); /显示光标移动位置lcd_write_com(0x0c); /显示开及光标设置lcd_write_com(0x01); /显示清屏/*显示单个字符*/void ShowChar(uchar pos,uchar c) unsigned char p;if (pos>=0x10)p=pos+0xb0; /是第二行则命令代码高4

7、位为0xcelse p=pos+0x80; /是第二行则命令代码高4位为0x8lcd_write_com(p);/写命令lcd_write_dat(c); /写数据/*显示字符串*/void ShowSt ring (uchar line,char *ptr) unsigned char l,*p;p=ptr;l=line<<4;while(*p)!='0')ShowChar(l+,*(p);p+;/*温度显示函数*/void WENdisp(void) ShowString(0,WEN1);_nop_(); ShowString(1

8、,WEN2); /*湿度显示函数*/void SHIdisp(void) ShowString(0,SHI1);_nop_();ShowString(1,SHI2);/*VOC调用的显示函数*/void VOCdisp(void) ShowString(0,VOC1);_nop_(); ShowString(1,VOC2); /*报警用函数*/void Beep(unsigned char i,j)/i用于确定亮灯方式，j用于确定蜂鸣器是否报警unsigned char m;led1=led2=1;for(m=0; m<250; m+)switch(i)case 0:break;

9、case 1:led1=led2=0;break;/低电平点亮case 2:led1=0;break;case 3:led2=0;break;beep = j;delay_1ms(2);led1=led2=1;beep = 0;delay_1ms(2);void voc_warning()unsigned char voc_t;unsigned char voc_h;voc_t=('0'+VOC26)*10+('0'+VOC28);voc_h=('0'+VOC19)*10+('0&a

10、mp;#39;+VOC111);if(voc_t>voc_h)Beep(1,1);else Beep(0,0);void wen_warning()unsigned char wen_t;unsigned char wen_h;unsigned char wen_l;wen_t=('0'+WEN26)*10+('0'+WEN27);wen_l=('0'+WEN14)*10+('0'+WEN15);wen_h=('0'+WE

11、N110)*10+('0'+WEN111);if(wen_t>wen_h|wen_t<wen_l)Beep(2,1);else Beep(0,0);void shi_warning()unsigned char shi_t;unsigned char shi_h;unsigned char shi_l;shi_t=('0'+SHI26)*10+('0'+SHI27);shi_l=('0'+SHI14)*10+('0&

12、#39;+SHI15);shi_h=('0'+SHI110)*10+('0'+SHI111);if(shi_t>shi_h|shi_t<shi_l)Beep(3,1);else Beep(0,0);/*按键*/*进入设定功能*/unsigned char key_set(void)if(key_S=0)delay_1ms(10);if(key_S=0)while(!key_S);num+;k_flag=num%4;else k_flag=num%4;else k_flag=num%4;return k_

13、flag;/*调整数据*/unsigned char key_adddec(unsigned char dat)if(key_U=0)delay_1ms(10);if(key_U=0)while(!key_U);if(dat<'9')dat+;elsedat='9'if(key_D=0)delay_1ms(10);if(key_D=0)while(!key_D);if(dat>'0')dat-;elsedat='0'return dat;/

14、* *左右移位*/unsigned char key_LR()if(key_L=0)delay_1ms(10);if(key_L=0)while(!key_L);if(wei=0)wei=3;else wei-;if(key_R=0)delay_1ms(10);if(key_R=0)while(!key_R);if(wei=3)wei=0;else wei+;return wei;/*主函数调用的按键函数*/void set_updn_dat(void)while(key_set()unsigned j=key_LR(); if(key_set()=1) switch(j>0)c

15、ase 1:j=2;break;case 0:j=0;break;VOCdisp();VOC1j+9=key_adddec(VOC1j+9);lcd_write_com(0x80+j+9);lcd_write_dat(VOC1j+9); else if(key_set()=2)switch(j)case 2:j=6;break;case 3:j=7;break;WENdisp();WEN1j+4=key_adddec(WEN1j+4);lcd_write_com(0x80+j+4);lcd_write_dat(WEN1j+4);else if(key_set()=3)switch(j)case

16、 2:j=6;break;case 3:j=7;break;SHIdisp();SHI1j+4=key_adddec(SHI1j+4);lcd_write_com(0x80+j+4);lcd_write_dat(SHI1j+4);/*手动自动切换功能*/unsigned char key_change(void)if(key_U=0)delay_1ms(10);if(key_U=0)while(!key_U);c_num+;c_flag=c_num%4;else c_flag=c_num%4;else c_flag=c_num%4;return c_flag;/*传感器函数*/*DHT测试*/

17、*温湿度读取函数*/char DHTread_data()unsigned char i,num,temp;num=0;for(i=0;i<8;i+)flag=2;while(!DHT)&&flag+);delay_10us();delay_10us();delay_10us();if(DHT=1) temp=1;flag=2;while(DHT&&flag+);elsetemp=0;num<<=1;num|=temp; return(num);/*初始化及采集程序*/void DHTre

18、ad_init()DHT=0; /主机使DHT11低电平并延时至少18msdelay_1ms(21);DHT=1; /主机置DHT11高电平2040us,并等待从机相应delay_10us();delay_10us();delay_10us();DHT=1;if(!DHT) /从机发出相应信号flag=2;while(!DHT)&&flag+); flag=2;while(DHT&&flag+);/开始采集数据tr_shiZ=DHTread_data();/采集湿度整数部分tr_shiX=DHTread_data();/采集湿度小

19、数部分tr_wenZ=DHTread_data();/采集温度整数部分tr_wenX=DHTread_data();/采集温度小数部分check=DHTread_data();/采集校验位DHT=1; /*显示测试结果*/void DHT11()unsigned char temp; DHTread_init();temp=tr_shiZ+tr_shiX+tr_wenZ+tr_wenX;if(check=temp)shiZ=tr_shiZ;shiX=tr_shiX;wenZ=tr_wenZ;wenX=tr_wenX;WEN26='0'+wenZ/10;WEN27

20、='0'+wenZ%10;WEN29='0'+wenX/10;WEN210='0'+wenX%10;SHI26='0'+shiZ/10;SHI27='0'+shiZ%10;SHI29='0'+shiX/10;SHI210='0'+shiX%10;/*气体浓度检测*/*系统初始化*/ void init() TMOD = 0x01; /设定定时器T0工作方式 TH0=(65536-2)%256; TL0=(65536-2)/256;ET0=1; /允许T0中断EA=1; /开总中断 TR0=1; /启动定时器T0 /*T0中断服务程序*/ void t0(void) interrupt 1 /using 1 TH0=(65536-2)%256; TL0=(65536-2