51单片机实现电压、温度、时间的现实附带proteus仿真

#include "reg52.h" #include "intrins.h" #include "LCD1602.h" #include "LCD1602.c" #define uchar unsigned char #define uint unsigned int #define DATA P1 sbit START=P3^2; //启动信号 sbit EOC=P3^1; //转换结束信号 sbit OE=P3^0; //输出使能 sbit a=P3^5; sbit b=P3^4; sbit c=P3^3; sbit set=P2^4; sbit jia=P2^5; sbit jian=P2^6; sbit DQ=P2^3; uchar flag=0;shi=10,fen=0,miao=50,set_flag; uchar bai1,shi1,ge1; uchar TD,flagDOT=0; uchar tempH,tempL,num;//定义一些变量 uint voltage; double data tvdata; void delay(void) //???? { uint i; for(i=0;i<10;i++); } void delay_s(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } void timer0_init() //定时器初始化 { TMOD=0X01;//设置定时器0为工作方式一 TH0=(65536-50000)/256; //设置了50ms的初值从15536开始加 TL0=(65536-50000)%256; ET0=1;//定时器T0允许位 开定时器0中段 TR0=1;//设置to允许控制位 启动定时器0 EA=1;//总中断 } void delay_t(uint t)//延时函数 { for(;t>0;t--); } void reset()//18b20复位信号 { uchar presence=1; while(presence)//等待18b20复位信号完成 { while(presence)//等待18b20复位信号完成确定一下 { DQ=1;_nop_();_nop_(); DQ=0; delay_t(50); DQ=1; delay_t(6); presence=DQ; } delay_t(45); presence=~DQ; } DQ=1; } void write_byte(uchar val)//像18b20写值 { uchar i; for(i=8;i>0;i--) { DQ=1;_nop_();_nop_(); DQ=0;_nop_();_nop_();_nop_();_nop_();_nop_(); DQ=val&0x01; delay_t(6); val=val>>1; } DQ=1; _nop_(); } uchar read_byte(void)//像18b20读值 { uchar i; uchar value=0; for(i=8;i>0;i--) { DQ=1;_nop_();_nop_(); value>>=1; DQ=0; _nop_();_nop_();_nop_();_nop_(); DQ=1; _nop_();_nop_();_nop_();_nop_(); if(DQ) value|=0x80; delay_t(6); } DQ=1; return(value); } void read_temp()//根据温度传感器的手册 读取温度 { uchar ch1,ch2; uchar tltemp; flagDOT=0; reset(); write_byte(0xcc); write_byte(0x44); reset(); write_byte(0xcc); write_byte(0xbe); ch1=read_byte(); ch2=read_byte(); if((ch2&0xf8)!=0x00)//判断高五位 得到温度正负标志 { flagDOT=1; ch1=~ch1; //取反 ch2=~ch2; //取反 tltemp=ch1+1; //低位加1 ch1=tltemp; if(tltemp>255) ch2++; //如果低8位大于255，向高8位进1 tempH=ch2*16+ch1/16; //实际温度值=(TH*256+TL)/16,即：TH*16+TL/16 //这样得出的是温度的整数部分,小数部分被丢弃了 tempL=(ch1%16)*10/16; //计算温度的小数部分,将余数乘以10再除以16取整， } tempH=ch2*16+ch1/16; //实际温度值=(TH*256+TL)/16,即：TH*16+TL/16 //这样得出的是温度的整数部分,小数部分被丢弃了 tempL=(ch1%16)*10/16; //计算温度的小数部分,将余数乘以10再除以16取整， //这样得到的是温度小数部分的第一位数字(保留1位小数) num=(ch2<<4)|(ch1>>4); tempH=num/10; tempL=num-tempH*10; TD=(ch1%16)*10/16; } void show_main_face() { WriteAddress(0x00); Print("time: : : "); WriteAddress(0x40); Print("V: . "); WriteAddress(0x47); Print("Temp: . "); } void keyscan() { if(jia==0) { delay_s(5); if(jia==0) { switch(set_flag) { case 1:shi++; if(shi==23)shi=0; WriteAddress(0x05); WriteData(shi/10+0x30); WriteData(shi%10+0x30); WriteAddress(0x06); Write_com(0x0f);break; case 2:fen++; if(fen==59)fen=0; WriteAddress(0x08); WriteData(fen/10+0x30); WriteData(fen%10+0x30); WriteAddress(0x09); Write_com(0x0f);break; case 3:miao++;if(miao==59)miao=0;WriteAddress(0x0b); WriteData(miao/10+0x30); WriteData(miao%10+0x30); WriteAddress(0x0c); Write_com(0x0f);break; } } while(!jia); } if(jian==0) { delay_s(5); if(jian==0) { switch(set_flag) { case 1:shi--; if(shi==0)shi=23; WriteAddress(0x05); WriteData(shi/10+0x30); WriteData(shi%10+0x30); WriteAddress(0x06); Write_com(0x0f);break; case 2:fen--; if(fen==0)fen=59; WriteAddress(0x08); WriteData(fen/10+0x30); WriteData(fen%10+0x30); WriteAddress(0x09); Write_com(0x0f);break; case 3:miao--;if(miao==0)miao=59;WriteAddress(0x0b); WriteData(miao/10+0x30); WriteData(miao%10+0x30); WriteAddress(0x0c); Write_com(0x0f);break; } } while(!jian); } } void fun() { a=0;b=0;c=0; START=1; START=0; while(EOC==0); OE=1; tvdata=P1; OE=0; delay(); voltage=(tvdata*5/255)*100; } void main() { //uchar temp; LcdInt(); timer0_init(); Write_com(0x01); //清屏幕指令，将以前的显示内容清除 delay_s(5); show_main_face(); while(1) { read_temp();//读取温度 //qian1=tempH/10;//将温度的值分离出来 bai1=tempH%10; shi1=tempL; ge1=TD; //temp=tempH*10+tempL; //将温度合成 if(set==0) { delay_s(5); if(set==0) { set_flag++; if(set_flag==4) set_flag=0; switch(set_flag) { case 0:Write_com(0x0c);TR0=1;Write_com(0x01);delay_s(5);show_main_face();break; case 1:TR0=0;WriteAddress(0x06);Write_com(0x0f);break; case 2:WriteAddress(0x09);Write_com(0x0f);break; case 3:WriteAddress(0x0c);Write_com(0x0f);break; } } while(!set); } if(set_flag==0) { WriteAddress(0x05); WriteData(shi/10+0x30); WriteData(shi%10+0x30); WriteAddress(0x08); WriteData(fen/10+0x30); WriteData(fen%10+0x30); WriteAddress(0x0b); WriteData(miao/10+0x30); WriteData(miao%10+0x30); WriteAddress(0x42); WriteData(voltage/100+0x30); WriteAddress(0x44); WriteData(voltage%100/10+0x30); WriteData(voltage%100%10+0x30); WriteAddress(0x4c); WriteData(bai1+0x30); WriteAddress(0x4d); WriteData(shi1+0x30); WriteAddress(0x4f); WriteData(ge1+0x30); } keyscan(); fun(); } } void timer0() interrupt 1 //中断号为1 { unsigned char tt; TH0=(65536-50000)/256; TL0=(65536-50000)%256; tt++; if(tt==20) { tt=0; miao++; if(miao==60) { fen++; miao=0; } if(fen==60) { shi++; fen=0; } if(shi==24) { shi=0; } } }