基于单片机火灾报警器程序Word版

1、基于单片机火灾报警器程序#include<reg52.h>#include<stdio.h>#include<intrins.h> #define uchar unsigned char#define uint unsigned int#define AddWr 0x90 /写数据地址 #define AddRd 0x91 /读数据地址#define RS_CLR RS=0 #define RS_SET RS=1#define RW_CLR RW=0 #define RW_SET RW=1 #define EN_CLR EN=0#define EN_SET

2、EN=1#define DataPort P0sbit RS = P10; /定义端口 sbit RW = P11;sbit EN = P25;sbit DU = P26;sbit WE = P27;sbit DS=P22;sbit FM=P23;sbit RST=P24; /时钟 加上后可以关掉DS1302芯片输出sbit Sda=P20; /定义总线连接端口sbit Scl=P21;sbit LED1=P10; /定义指示灯端口sbit LED2=P12;sbit LED3=P14;sbit LED4=P16;/sbit LED5=P11;/>>>>>>

3、>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>/键盘引脚定义/>>>>>>>>>

4、>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>#define KeyPort P3bit ADFlag; /定义AD采样标志位uint temp;uchar

5、ADtemp; /定义中间变量uchar w;uchar w1=30;uchar y;uchar y1=80;uchar num;void DelayUs2x(unsigned char t) while(-t);/*- mS延时函数，含有输入参数 unsigned char t，无返回值 unsigned char 是定义无符号字符变量，其值的范围是 0255 这里使用晶振12M，精确延时请使用汇编-*/void DelayMs(unsigned char t) while(t-) /大致延时1mS DelayUs2x(245); DelayUs2x(245); />>>&

6、gt;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&

7、gt;>>/按键扫描函数，返回扫描键值/>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&g

8、t;>>>>>>>>>>>>>unsigned char KeyScan(void) unsigned char keyvalue; if(KeyPort!=0xff) DelayMs(1); if(KeyPort!=0xff) keyvalue=KeyPort; while(KeyPort!=0xff);switch(keyvalue) /case 0xfe:return 1;break;/ case 0xfd:return 2;break;/ case 0xfb:return 3;break; /case 0xf

9、7:return 4;break; case 0xef:return 5;break; case 0xdf:return 6;break; case 0xbf:return 7;break; case 0x7f:return 8;break; default:return 0;break; return 0;void keyvalue()/键盘功能程序 num=KeyScan(); /循环调用按键扫描 switch(num) case 5:w1+;break;case 6:w1-;break; case 7:y1+;break;case 8:y1-;break; default:break;

10、/*烟雾采集程序*/*- 初始化定时器1-*/void Init_Timer0(void) TMOD= 0x01; TH0=0xff; /* Init value */ TL0=0x00; /PT1=1; /* 优先级 */ EA=1; /* interupt enable */ ET0=1; /* enable timer1 interrupt */ TR0=1; /*- 启动IIC总线-*/ void Start(void) Sda=1; _nop_(); Scl=1; _nop_(); Sda=0; _nop_(); Scl=0; /*- 停止IIC总线-*/ void Stop(voi

11、d) Sda=0; _nop_(); Scl=1; _nop_(); Sda=1; _nop_(); Scl=0; /*- 应答IIC总线-*/ void Ack(void) Sda=0;_nop_();Scl=1;_nop_();Scl=0;_nop_();/*- 非应答IIC总线-*/void NoAck(void) Sda=1; _nop_(); Scl=1; _nop_(); Scl=0; _nop_(); /*- 发送一个字节-*/ void Send(unsigned char Data) uchar BitCounter=8; uchar temp; do temp=Data;

12、Scl=0; _nop_(); if(temp&0x80)=0x80) Sda=1; else Sda=0;Scl=1;temp=Data<<1;Data=temp;BitCounter-; while(BitCounter); Scl=0; /*- 读入一个字节并返回-*/ unsigned char Read(void) uchar temp=0; uchar temp1=0; uchar BitCounter=8; Sda=1; do Scl=0; _nop_(); Scl=1; _nop_(); if(Sda) temp=temp|0x01; else temp=t

13、emp&0xfe; if(BitCounter-1) temp1=temp<<1; temp=temp1; BitCounter-; while(BitCounter);return(temp); /*- 写入DA数模转换值-*/ void DAC(unsigned char Data) Start(); Send(AddWr); /写入芯片地址 Ack(); Send(0x40); /写入控制位，使能DAC输出 Ack(); Send(Data); /写数据 Ack(); Stop(); /*- 读取AD模数转换的值，有返回值-*/ unsigned char ReadA

14、DC(unsigned char Chl) uchar Data; Start(); /写入芯片地址 Send(AddWr); Ack(); Send(0x40|Chl);/写入选择的通道，本程序只用单端输入，差分部分需要自行添加 /Chl的值分别为0、1、2、3，分别代表1-4通道 Ack(); Start(); Send(AddRd); /读入地址 Ack(); Data=Read(); /读数据 Scl=0; NoAck(); Stop(); return Data; /返回值 void yanwuget() /获得烟雾值 if(ADFlag) /定时采集输入模拟量 ADFlag=0;

15、ADtemp=ReadADC(3); /*DS18B20数据采集*/void delay(uint count) /延时函数 uint i; while(count) i=200; while(i>0) i-; count-; void Init_Com(void)/串口初始化，波特率9600，方式1 TMOD = 0x20; PCON = 0x00; SCON = 0x50; TH1 = 0xFd; TL1 = 0xFd; TR1 = 1; PT1=1;void dsreset(void)/发送复位和初始化命令 uint i; DS=0; i=103; while(i>0)i-;

16、 DS=1; i=4; while(i>0)i-;bit tmpreadbit(void) /read a bit uint i; bit dat; DS=0;i+; /i+ for delay DS=1;i+;i+; dat=DS; i=8;while(i>0)i-; return (dat);uchar tmpread(void) /read a byte date uchar i,j,dat; dat=0; for(i=1;i<=8;i+) j=tmpreadbit(); dat=(j<<7)|(dat>>1); /读出的数据最低位在最前面，这样

17、刚好一个字节在DAT里 return(dat);void tmpwritebyte(uchar dat) /向DS18B20写一位 uint i; uchar j; bit testb; for(j=1;j<=8;j+) testb=dat&0x01; dat=dat>>1; if(testb) /写1 DS=0; i+;i+; DS=1; i=8;while(i>0)i-; else DS=0; /写0 i=8;while(i>0)i-; DS=1; i+;i+; void tmpchange(void) /DS18B20 begin change ds

18、reset(); delay(1); tmpwritebyte(0xcc); / address all drivers on bus tmpwritebyte(0x44); / initiates a single temperature conversionuint tmp() /get the temperature float tt; uchar a,b; dsreset(); delay(1); tmpwritebyte(0xcc); tmpwritebyte(0xbe); a=tmpread(); b=tmpread(); temp=b; temp<<=8; /two

19、byte compose a int variable temp=temp|a; tt=temp*0.05; temp=tt*10+0.5; return temp;void readrom() /read the serial uchar sn1,sn2; dsreset(); delay(1); tmpwritebyte(0x33); sn1=tmpread(); sn2=tmpread(); /*LCD显示程序*/void cmg(void)/数码管锁存函数 关时钟DS1302DU=1;P0=0x00;DU=0;WE=1;P0=0x00;WE=0;RST=0;/关时钟DS1302/*-

20、判忙函数-*/ bit LCD_Check_Busy(void) DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; _nop_(); EN_SET; return (bit)(DataPort & 0x80); /*- 写入命令函数-*/ void LCD_Write_Com(unsigned char com) while(LCD_Check_Busy(); /忙则等待 RS_CLR; RW_CLR; EN_SET; DataPort= com; _nop_(); EN_CLR; /*- 写入数据函数-*/ void LCD_Write_Data(uns

21、igned char Data) while(LCD_Check_Busy(); /忙则等待 RS_SET; RW_CLR; EN_SET; DataPort= Data; _nop_(); EN_CLR; /*- 清屏函数-*/ void LCD_Clear(void) LCD_Write_Com(0x01); DelayMs(5); /*- 写入字符串函数-*/ void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s) if (y = 0) LCD_Write_Com(0x80 + x); /表示第一行

22、else LCD_Write_Com(0xC0 + x); /表示第二行 while (*s) LCD_Write_Data( *s); s +; /*- 写入字符函数-*/ void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data) if (y = 0) LCD_Write_Com(0x80 + x); else LCD_Write_Com(0xC0 + x); LCD_Write_Data( Data); /*- 初始化函数-*/ void LCD_Init(void) LCD_Write_Com(0x38

23、); /*显示模式设置*/ DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); LCD_Write_Com(0x08); /*显示关闭*/ LCD_Write_Com(0x01); /*显示清屏*/ LCD_Write_Com(0x06); /*显示光标移动设置*/ DelayMs(5); LCD_Write_Com(0x0C); /*显示开及光标设置*/ void wendudisplay(uint temp)/温度显示程序 uchar a20;

24、uchar A1,A2,A2t,A3,ser,A4,A5; ser=temp/10; SBUF=ser; A1=temp/100; A2t=temp%100; A2=A2t/10; A3=A2t%10; A4=w1/10; A5=w1%10; A1=A1+'0' A2=A2+'0' A3=A3+'0' A4=A4+'0' A5=A5+'0' a0=A1; a1=A2; a2=46; a3=A3; a4=' ' a5=67; a6=' ' a7=' ' a8=76; a

25、9=58; a10=A4; a11=A5; a12='0' LCD_Write_String(2,0,a);void yanwudisplay(uint temp)/浓度显示程序 uchar b20; uchar A1,A2,A2t,A3,A3t,A4,A5,A6,A6t,A7,A7t,A8; A1=temp/1000; A2t=temp%1000; A2=A2t/100; A3t=A2t%100; A3=A3t/10; A4=A3t%10; A5=y1/1000; A6t=y1%1000; A6=A6t/100; A7t=A6t%100; A7=A7t/10; A8=A7t%

26、10; A1=A1+'0' A2=A2+'0' A3=A3+'0' A4=A4+'0' A5=A5+'0' A6=A6+'0' A7=A7+'0' A8=A8+'0' b0=A1; b1=A2; b2=A3; b3=A4; b4='p' b5='p' b6='m' b7=' ' b8=76; b9=58; b10=A5; b11=A6; b12=A7; b13=A8; b14='0' LCD_Write_String(2,1,b);void beep(void)