基于單片機火災(zāi)報警器程序(共16頁)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上基于單片機火災(zāi)報警器程序#include<reg52.h>#include<stdio.h>#include<intrins.h> #define uchar unsigned char#define uint unsigned int#define AddWr 0x90 /寫數(shù)據(jù)地址 #define AddRd 0x91 /讀數(shù)據(jù)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#d

2、efine EN_SET EN=1#define DataPort P0sbit RS = P10; /定義端口 sbit RW = P11;sbit EN = P25;sbit DU = P26;sbit WE = P27;sbit DS=P22;sbit FM=P23;sbit RST=P24; /時鐘 加上后可以關(guān)掉DS1302芯片輸出sbit Sda=P20; /定義總線連接端口sbit Scl=P21;sbit LED1=P10; /定義指示燈端口sbit LED2=P12;sbit LED3=P14;sbit LED4=P16;/sbit LED5=P11;/>>>

3、;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>/鍵盤引腳定義/>>>>>>

4、;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>#define KeyPort P3bit ADFlag; /定義AD采樣標(biāo)志位uin

5、t temp;uchar ADtemp; /定義中間變量uchar w;uchar w1=30;uchar y;uchar y1=80;uchar num;void DelayUs2x(unsigned char t) while(-t);/*- mS延時函數(shù)，含有輸入?yún)?shù) unsigned char t，無返回值 unsigned char 是定義無符號字符變量，其值的范圍是 0255 這里使用晶振12M，精確延時請使用匯編-*/void DelayMs(unsigned char t) while(t-) /大致延時1mS DelayUs2x(245); DelayUs2x(245); /

6、>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

7、>>>>>>/按鍵掃描函數(shù)，返回掃描鍵值/>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>&

8、gt;>>>>>>>>>>>>>>>>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;bre

9、ak; /case 0xf7: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()/鍵盤功能程序 num=KeyScan(); /循環(huán)調(diào)用按鍵掃描 switch(num) case 5:w1+;break;case 6:w1-;break; case 7:y1+;break;case 8:y1-;break; de

10、fault:break; /*煙霧采集程序*/*- 初始化定時器1-*/void Init_Timer0(void) TMOD= 0x01; TH0=0xff; /* Init value */ TL0=0x00; /PT1=1; /* 優(yōu)先級 */ EA=1; /* interupt enable */ ET0=1; /* enable timer1 interrupt */ TR0=1; /*- 啟動IIC總線-*/ void Start(void) Sda=1; _nop_(); Scl=1; _nop_(); Sda=0; _nop_(); Scl=0; /*- 停止IIC總線-*/

11、void Stop(void) Sda=0; _nop_(); Scl=1; _nop_(); Sda=1; _nop_(); Scl=0; /*- 應(yīng)答IIC總線-*/ void Ack(void) Sda=0;_nop_();Scl=1;_nop_();Scl=0;_nop_();/*- 非應(yīng)答IIC總線-*/void NoAck(void) Sda=1; _nop_(); Scl=1; _nop_(); Scl=0; _nop_(); /*- 發(fā)送一個字節(jié)-*/ void Send(unsigned char Data) uchar BitCounter=8; uchar temp; d

12、o temp=Data; Scl=0; _nop_(); if(temp&0x80)=0x80) Sda=1; else Sda=0;Scl=1;temp=Data<<1;Data=temp;BitCounter-; while(BitCounter); Scl=0; /*- 讀入一個字節(jié)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

13、; else temp=temp&0xfe; if(BitCounter-1) temp1=temp<<1; temp=temp1; BitCounter-; while(BitCounter);return(temp); /*- 寫入DA數(shù)模轉(zhuǎn)換值-*/ void DAC(unsigned char Data) Start(); Send(AddWr); /寫入芯片地址 Ack(); Send(0x40); /寫入控制位，使能DAC輸出 Ack(); Send(Data); /寫數(shù)據(jù) Ack(); Stop(); /*- 讀取AD模數(shù)轉(zhuǎn)換的值，有返回值-*/ unsign

14、ed char ReadADC(unsigned char Chl) uchar Data; Start(); /寫入芯片地址 Send(AddWr); Ack(); Send(0x40|Chl);/寫入選擇的通道，本程序只用單端輸入，差分部分需要自行添加 /Chl的值分別為0、1、2、3，分別代表1-4通道 Ack(); Start(); Send(AddRd); /讀入地址 Ack(); Data=Read(); /讀數(shù)據(jù) Scl=0; NoAck(); Stop(); return Data; /返回值 void yanwuget() /獲得煙霧值 if(ADFlag) /定時采集輸入模

15、擬量 ADFlag=0; ADtemp=ReadADC(3); /*DS18B20數(shù)據(jù)采集*/void delay(uint count) /延時函數(shù) 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)/發(fā)送復(fù)位和初始化命令 uint i; DS=0; i=103; whi

16、le(i>0)i-; 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); /讀出

17、的數(shù)據(jù)最低位在最前面，這樣剛好一個字節(jié)在DAT里 return(dat);void tmpwritebyte(uchar dat) /向DS18B20寫一位 uint i; uchar j; bit testb; for(j=1;j<=8;j+) testb=dat&0x01; dat=dat>>1; if(testb) /寫1 DS=0; i+;i+; DS=1; i=8;while(i>0)i-; else DS=0; /寫0 i=8;while(i>0)i-; DS=1; i+;i+; void tmpchange(void) /DS18B20 be

18、gin change dsreset(); 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<

19、<=8; /two 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顯示程序*/void cmg(void)/數(shù)碼管鎖存函數(shù) 關(guān)時鐘DS1302DU=1;P0=0x00;DU=0;WE=1;P0=0x00;WE=0;RST=0;/

20、關(guān)時鐘DS1302/*- 判忙函數(shù)-*/ bit LCD_Check_Busy(void) DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; _nop_(); EN_SET; return (bit)(DataPort & 0x80); /*- 寫入命令函數(shù)-*/ void LCD_Write_Com(unsigned char com) while(LCD_Check_Busy(); /忙則等待 RS_CLR; RW_CLR; EN_SET; DataPort= com; _nop_(); EN_CLR; /*- 寫入數(shù)據(jù)函數(shù)-*/ void LCD_W

21、rite_Data(unsigned char Data) while(LCD_Check_Busy(); /忙則等待 RS_SET; RW_CLR; EN_SET; DataPort= Data; _nop_(); EN_CLR; /*- 清屏函數(shù)-*/ void LCD_Clear(void) LCD_Write_Com(0x01); DelayMs(5); /*- 寫入字符串函數(shù)-*/ void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s) if (y = 0) LCD_Write_Com(0x80

22、+ x); /表示第一行 else LCD_Write_Com(0xC0 + x); /表示第二行 while (*s) LCD_Write_Data( *s); s +; /*- 寫入字符函數(shù)-*/ 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); /*- 初始化函數(shù)-*/ void LCD_Init(void) LCD_W

23、rite_Com(0x38); /*顯示模式設(shè)置*/ DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); LCD_Write_Com(0x08); /*顯示關(guān)閉*/ LCD_Write_Com(0x01); /*顯示清屏*/ LCD_Write_Com(0x06); /*顯示光標(biāo)移動設(shè)置*/ DelayMs(5); LCD_Write_Com(0x0C); /*顯示開及光標(biāo)設(shè)置*/ void wendudisplay(uint temp)/溫度顯示程

24、序 uchar a20; 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=' &

25、#39; a8=76; a9=58; a10=A4; a11=A5; a12='0' LCD_Write_String(2,0,a);void yanwudisplay(uint temp)/濃度顯示程序 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=A7

26、t/10; A8=A7t%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)