水位与水温自动控制C程序

#include<reg51.h>#include<stdlib.h>#include<intrins.h>//----------------------------------------------------------------------------------------------//变量声明//----------------------------------------------------------------------------------------------char aucLED_SELECT_01[10]={0x00,0x01,0x01,0x03,0x07,0x0F,0x1F,0x3f,0x7f,0xFf,}; //光柱定义unsigned char k,j;unsigned char i;unsigned char xiaoshu=0;unsigned char gewei=5;unsigned char shiwei=6;char led_tab[] = {0x3F,//00x06, //10x5B, //20x4F, //30x66, //40x6D, //50x7D, //60x07, //70x7F, //80x6F, //9};char led_code_tab[]={0x39, //10_c0x79, //11_e0x01, //12_-0x80, //13_.};char led_buff[5] = {0,0,0,0,0}; //字段缓冲char float_tab[16] = {0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9};//小数表sbit ds18b20_io = P1^3;unsigned char k=0;unsigned char j=0;//io口定义sbit alarm=P1^0;sbit P1_1=P1^1;sbit P1_2=P1^2;sbit jiare=P3^1;sbit jiangwen=P3^0;sbit P3_2=P3^2;sbit P3_3=P3^3;sbit xia=P3^6;sbit shang=P3^7;sbit P3_5=P3^5;sbit SEG_1=P1^4;sbit SEG_2=P1^5;sbit SEG_3=P1^6;sbit SEG_4=P1^7;//---------------------------------------------------------------------------------------------- //延时函数//---------------------------------------------------------------------------------------------- void delay_xus(unsigned char x){while(--x);}void delay_xms(unsigned char x){while(--x){delay_xus(250);delay_xus(245);};}//---------------------------------------------------------------------------------------------- //显示函数//----------------------------------------------------------------------------------------------void display(){//显示000XP0=0;SEG_1=0;P0 = led_buff[3];delay_xms(10);SEG_1 = 1;//显示00X0SEG_2=0;P0 = led_buff[2];delay_xms(10);SEG_2=1;//显示0X00SEG_3=0;P0 =led_buff[1]+led_code_tab[3]; // 显示各位与小数点delay_xms(10);SEG_3 =1 ;P0 = 0x00;//显示X000SEG_4=0;P0 = led_buff[0];delay_xms(10);SEG_4=1;}//---------------------------------------------------------------------------------------------- //DS18B20操作函数//---------------------------------------------------------------------------------------------- bit ds18b20_init(){bit is_success = 1;ds18b20_io = 1;delay_xus(2);//延时9usds18b20_io = 0;//拉低IO口delay_xus(250);//延时505us，复位ds18b20_io = 1;//提升数据线delay_xus(28);//延时61usif(ds18b20_io == 1)is_success = 0;delay_xus(118);//延时241usreturn is_success;}void ds18b20_writebyte(unsigned char buff){unsigned char i;ds18b20_io = 1;//准备发送delay_xus(1);//延时7usfor(i=0;i<8;i++){if(buff & 0x01)//获取1位，低位在前{ds18b20_io = 0;//开始发送1位delay_xus(5);//延时15usds18b20_io = 1;//发送1}else{ds18b20_io = 0;//开始发送1位delay_xus(5);//延时15us//发送0}delay_xus(20);//延时45us，等待发送完毕ds18b20_io = 1;//准备发送delay_xus(8);//延时21usbuff >>= 1;}}unsigned char ds18b20_readbyte(void){unsigned char i;unsigned char buff = 0;ds18b20_io = 1;//准备读取delay_xus(1);//延时7usfor(i=0;i<8;i++){buff >>= 1;ds18b20_io = 0;//开始读取1位delay_xus(1);//延时7usds18b20_io = 1;//必须写1，否则读出来的将是不预期的数据delay_xus(1);//延时7usif(ds18b20_io)//在14us处读取数据buff |= 0x80;delay_xus(20);//延时45us，等待读取完毕ds18b20_io = 1;//准备读取delay_xus(8);//延时21us}return buff;}//----------------------------------------------------------------------------------------------//主函数//----------------------------------------------------------------------------------------------void main(){bit ds18b20_busy = 0;unsigned char ds18b20_tt_count = 0;unsigned char th = 0;unsigned char tl = 0;unsigned int temperature = 0;bit isminus = 0;bit isoverflow = 0;while(1){if(ds18b20_busy == 0){//启动一次转换if(ds18b20_init() == 1)//初始化ds18b20{ds18b20_writebyte(0xCC);//跳过读序号列号的操作ds18b20_writebyte(0x44);//启动温度转换ds18b20_busy = 1;//置ds18b20忙标志，等待}}else{//读取温度if(ds18b20_tt_count > 85){if(ds18b20_init() == 1){ds18b20_writebyte(0xCC);//跳过读序号列号的操作ds18b20_writebyte(0xBE);//读取温度寄存器等（共可读9个寄存器）前两个就是温度tl = ds18b20_readbyte();//低位th = ds18b20_readbyte();//高位//计算温度temperature = (th << 8) + tl;isminus = 0;if((temperature&0xf000) == 0xf000)//判断是否是负温度{temperature = ~temperature + 1;isminus = 1;}temperature = (temperature >> 4) * 10 + float_tab[(temperature & 0x0f)];//规整温度：大于99.9，则都是99.9；小于-9.9，则都是-9.9isoverflow = 0;if(temperature > 999 && isminus == 0){temperature = 999;isoverflow = 1;}if(temperature > 99 && isminus == 1){temperature = 99;isoverflow = 1;}//读温度完毕ds18b20_busy = 0;//取消ds18b20忙标志ds18b20_tt_count = 0;}}}//设置按键加一或减一，设定我们所需要的值{if(P3_2==0){delay_xms(20);if(P3_2==1){gewei++;if(gewei==10){gewei=0;shiwei++;}if(shiwei==10){shiwei=0;}}}if(P3_3==0) //{delay_xms(20);if(P3_3==1){if(gewei>0)gewei--;else gewei=9;if(gewei==9)shiwei--;if(shiwei==-1){shiwei=9;}}}}//将我们设定的值与DS18B20相比较。