51单片机的液晶显示温度计程序51单片机的液晶显示温度计程序#include<reg51.h>#include <intrins.h>sbit RST = P2^0;sbit CLK = P2^1;sbit DQ = P2^2;sbit TSOR = P2^3;sbit ALERT =P2^4;sbit RS = P2^7;sbit RW = P2^6;sbit EN = P2^5;/*------------------------------------------全局变量-------------------------------------------------------*/static unsigned char temp1,temp2; //温度值的整数部分、小数部分static unsigned char pos,posset; //数字电位器电位值、设定值static unsigned char min,sec; //分钟、秒static unsigned char count; //Timer0中断计数static unsigned char minset; //设定的分钟数static unsigned char status1,status2; //状态标志bit stop,timeover; //定时停止、结束static char line0[] =" 00:00 ";static char line1[] =" . CW";/*-------------------------------------------------------------------------------------------------------------*/void InitInterupt();void KeyboardDelay();/*-------------------------------------------LCD驱动函数------------------------------------------------*/void DelayL();void DelayS();void WriteCommand(unsigned char c);void WriteData(unsigned char c);void ShowChar(unsigned char pos,unsigned char c); void ShowString(unsigned char line,char *ptr);void InitLcd();/*----------------------------------------------键盘-程序--------------------------------------------------*/unsigned char GetKey();/*---------------------------------------------数字温度计驱动-------------------------------------------*/void ChangePos(bit sel,unsigned char pos1,unsigned char pos2);/*------------------------------------------温度传感器驱动----------------------------------------------*/void Delay15();void Delay60();void Delay100ms();void Write0TS();void Write1TS();bit ReadTS();void ResetTS();void WriteByteTS(unsigned char byte); unsigned char ReadByteTS();void InitTS();void GetTempTS();/*-------------------------------------------------主程序---------------------------------------------------*/void main (void) {char code str1[] =" Hello World! ";char code str2[] =" 2002-10-20 "; unsigned char i; SP=0x50;ALERT=0; //报警灯灭TSOR=1; //1-wire总线释放DelayL();InitLcd(); //初始化LCDDelayL();ShowString(0,str1); //启动画面ShowString(1,str2);for(i=0;i<15;i++)Delay100ms();InitInterupt(); //初始化中断设置minset=10; //缺省定时10分钟posset=0; //缺省电位器值0min=minset; //初始化数据pos=posset;sec=0;count=0;P1=0xF0;status1=0;status2=0;stop=1;timeover=0; ChangePos(0,255-pos,255-pos); //设置电位器InitTS(); //初始化温度计while(1) //循环显示温度值{GetTempTS();line1[0]=0x20;i=temp1;if(i>39) //超过40摄氏度,告警灯亮ALERT=1;if(i>99) //超过100摄氏度,显示温度的百位{line1[0]=0x31;i-=100;}line1[1]=i/10+0x30; //显示温度的十位line1[2]=i%10+0x30; //显示个位line1[4]=temp2+0x30; //显示小数位if(timeover) //若定时结束,则电位器缓慢复0{for(;pos>0;pos--){ChangePos(0,255-pos,255-pos);_nop_();_nop_();}timeover=0;posset=0;}if(pos>posset) //若按键修改电位器位置{for(;pos>posset;pos--) //则缓变到设定值{ChangePos(0,255-pos,255-pos);_nop_();_nop_();}ChangePos(0,255-pos,255-pos);}else if(pos<posset){for(;pos<posset;pos++){ChangePos(0,255-pos,255-pos);_nop_();_nop_();}ChangePos(0,255-pos,255-pos);}i=pos;line1[9]=0x20; //显示电位器等级值if(i>99){line1[9]=i/100+0x30;i=i%100;}line1[10]=i/10+0x30;line1[11]=i%10+0x30;ShowString(1,line1);line0[5]=min/10+0x30; //显示时间line0[6]=min%10+0x30;line0[8]=sec/10+0x30;line0[9]=sec%10+0x30;ShowString(0,line0);Delay100ms();}}void InitInterupt(){TMOD=0x21; //初始化中断设置TL1=0xFD;TH1=0xFD;PX0=1;EA=1;ES=1;PCON=0;TR1=1;SCON=0x50;TL0=0x00; //定时0.05mTH0=0x4C;ET0=1; EX0=1;IT0=1;}void KeyboardDelay() //按键中断延时{unsigned char i,j;i=0x40;j=0xFF;while(i--)while(j--);}/*--------------------------------------------中断处理-----------------------------------------------------*/Int0_process() interrupt 0 using 0{unsigned char key;unsigned char keycode[]= "TP";unsigned char step[3]={1,2,5};EA=0;key=GetKey(); //获得按键值switch(key){case 0:stop=!stop;min=minset;sec=0;break;case 1:case 2:case 3:if(stop){minset+=step[key-1];if(minset>60)minset=0;min=minset;}break;case 5:case 6:case 7:if(stop){minset-=step[key-5]; if(minset>60) minset=0;min=minset;}break;case 9:case 10:case 11:posset+=step[key-9];break;case 13:case 14:case 15:posset-=step[key-13];break;default:break;}TR0=!stop;KeyboardDelay();P1=0xF0;EA=1;}Timer0_process() interrupt 1 using 0{EA=0;TR0=0;TL0=0x00;TH0=0x4C;count++;if(count==20) //如果到累计定时到达1s {if(sec==0) //定时处理{if(min==0) //总定时到,则置结束标志timeover=1;else{min--;sec=59;}}elsesec--;count=0;}TR0=1;EA=1;}/*--------------------------------------LCD驱动子程序--------------------------------------------------*/void DelayL(){unsigned char i,j;i=0xF0;j=0xFF;while(i--)while(j--);}void DelayS(){unsigned char i;i=0x1F;while(i--);}void WriteCommand(unsigned char c) {DelayS();EN=0;RS=0;RW=0;_nop_();EN=1;P0=c;EN=0;}void WriteData(unsigned char c){DelayS();EN=0;RS=1;RW=0;_nop_();EN=1;P0=c;EN=0;RS=0;}void ShowChar(unsigned char pos,unsigned char c) {unsigned char p;if(pos>=0x10)p=pos+0xB0;elsep=pos+0x80;WriteCommand(p);WriteData(c);}void ShowString(unsigned char line,char *ptr){unsigned char l,i;l=line<<4;for(i=0;i<16;i++)ShowChar(l++,*(ptr+i));} void InitLcd(){DelayL();WriteCommand(0x38);WriteCommand(0x38);WriteCommand(0x06);WriteCommand(0x0C);WriteCommand(0x01);WriteCommand(0x80);}/*---------------------------------------------键盘子程序-------------------------------------------------*/ unsigned char GetKey(){unsigned k,t,i,j;k=P1;k=k&0xF0;i=0;while((k&0x10)&&i<4) {i++;k=k>>1;}k=0x01;j=0;while(j<4){P1=0xFF^k;_nop_();t=P1;t=t^0xFF;t=t&0xF0;if(t)break;j++;k=k<<1;}k=j*4+i;return k;}/*-----------------------------------------数字温度计驱动子程序--------------------------------------*/void ChangePos(bit sel,unsigned char pos1,unsigned char pos2){ unsigned char i;RST=0;DQ=0;CLK=0;RST=1;DQ=sel;_nop_();CLK=1;_nop_();CLK=0;for(i=0;i<8;i++) {if(pos1&0x80)DQ=1;elseDQ=0;_nop_();CLK=1;_nop_();CLK=0;pos1=pos1<<1; }for(i=0;i<8;i++) {if(pos2&0x80)DQ=1;elseDQ=0;_nop_();CLK=1;_nop_();CLK=0;pos2=pos2<<1;}RST=0;}/*------------------------------------------温度传感器子程序-------------------------------------------*/void Delay100ms() //延时100ms {unsigned char i,j,k;for(i=0;i<8;i++)for(j=0;j<25;j++)for(k=0;k<250;k++);}void Delay15() //延时15us{unsigned char i;for(i=0;i<8;i++);}void Delay60() //延时60us{unsigned char i;for(i=0;i<30;i++);}void Write0TS() //写bit 0 {TSOR=1;TSOR=0;Delay15();Delay15();Delay15();Delay15();TSOR=1;_nop_();_nop_();}void Write1TS() //写bit 1 {TSOR=1;TSOR=0;_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();TSOR=1;_nop_(); _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();Delay15();Delay15();Delay15(); }bit ReadTS() {bit b;TSOR=1;TSOR=0; _nop_();_nop_();_nop_();_nop_();TSOR=1;_nop_();_nop_();_nop_();_nop_();_nop_();b=TSOR;Delay15();Delay15();Delay15();_nop_();_nop_();return b;}void ResetTS() //复位{unsigned char i; TSOR=1;TSOR=0;for(i=0;i<8;i++)Delay60();TSOR=1;while(TSOR);for(i=0;i<8;i++)Delay60();}void WriteByteTS(unsigned char byte) //写一个字节(byte){unsigned char i;for(i=0;i<8;i++){if(byte&0x01)Write1TS();elseWrite0TS();byte=byte>>1;}}unsigned char ReadByteTS() //读一个字节(byte){unsigned char i,j;bit b;j=0;for(i=0;i<8;i++){b=ReadTS();if(b)j+=1;j=_cror_(j,1);}return j;}void InitTS() //初始化温度转换{ResetTS();WriteByteTS(0xCC);WriteByteTS(0x4E);WriteByteTS(0x64);WriteByteTS(0x8A);WriteByteTS(0x1F);}void GetTempTS() //获取温度{ResetTS();WriteByteTS(0xCC);WriteByteTS(0x44);Delay100ms();ResetTS();WriteByteTS(0xCC);WriteByteTS(0xBE);temp2=ReadByteTS();temp1=ReadByteTS();ReadByteTS();ReadByteTS();ReadByteTS();ReadByteTS();ReadByteTS();ReadByteTS();ReadByteTS();temp1=temp1<<4;temp1+=(temp2&0xF0)>>4;temp2=(temp2&0x0F)?5:0;}液晶显示温度计程序。