- #include <reg52.H>
- #include <intrins.H> //含有 _nop_
- #define uchar unsigned char
- #define uint unsigned int
- sbit rw = P2^5;
- sbit RS = P2^6;
- sbit LCDEN = P2^7;
- sbit ds = P3^7; //18b20
- sbit beep = P2^1; //蜂鸣器
- sbit led_red = P2^2;
- sbit led_green = P2^0;
- sbit jian_key = P1^4; //减速
- sbit jia_key = P1^6; //加速
- sbit key_mo = P1^5; //模式选择
- sbit IN1=P3^2; //L298N--IN1 //电机驱动模块输入引脚1 //这里只需要一个驱动接口
- //sbit IN2=P3^3;
- //L298N--IN2 //电机驱动模块输入引脚2
- //sbit key_c = P1^5;//模式选择
- uint temp1=1;//温度初始值=1;储存温度整数部分
- bit flag=0; //模式标志位
- uchar a=0; //用于记录速度----按键
- uchar b=0; //用于记录速度----温度
- void delayUs()
- {
- _nop_();
- }
- void delayMs(uint a)
- {
- uint i, j;
- for(i = a; i > 0; i--)
- for(j = 100; j > 0; j--);
- }
- /************************电机驱动***********************/
- void temperature()
- {
- if(temp1<16)
- { b = 0; }
- else if(temp1<21)
- { b = 3; }
- else if(temp1<=28)
- { b = 5; }
- else
- { b = 8; }
- }
- void key_scan() //按键进行加减速
- {
- uchar i;
- if(jia_key==0) //加速
- {
- for(i=0;i<=10;i++); //小延时
- if(!jia_key)
- {
- a++;
- while(!jia_key);//等待松手
- if(a>=8)
- { a=8; }
- }
- }
- if(jian_key==0) //减速
- {
- for(i=0;i<=10;i++); //小延时
- if(!jian_key)
- {
- if(a==0)
- { a=1; }
- a--;
- while(!jian_key);
- }
- }
- if(key_mo==0)
- {
- for(i=0;i<=10;i++); //小延时
- while(!key_mo);
- flag = ~flag;
- }
- }
- void speed(uchar x)
- {
- IN1=1;//转动
- delayMs(x*10);
- IN1=0;//不转动
- delayMs(80-x*10);
- }
- /*******************电机驱动*************************/
- /******************lcd1602************************/
- void writeComm(uchar comm)
- {
- RS = 0;
- P0 = comm;
- LCDEN = 1;
- delayUs();
- LCDEN = 0;
- delayMs(1);
- }
- //写数据:RS=1, RW=0;
- void writeData(uchar dat)
- {
- RS = 1;
- P0 = dat;
- LCDEN = 1;
- delayUs();
- LCDEN = 0;
- delayMs(1);
- }
- void init()
- {
- rw = 0;
- writeComm(0x38);
- writeComm(0x0c);
- writeComm(0x06);
- writeComm(0x01);
- }
- void writeString(uchar * str, uchar length)
- {
- uchar i;
- for(i = 0; i < length; i++)
- {
- writeData(str[i]);
- }
- }
- /**********************lcd1602************************/
- /**//*****************************DS18B20*******************************/
- void dsInit()
- {
- uint i;
- ds = 0;
- i = 100;
- while(i>0) i--;
- ds = 1;
- i = 4;
- while(i>0) i--;
- }
- void dsWait()
- {
- uint i;
- while(ds);
- while(~ds);
- i = 4;
- while(i > 0) i--;
- }
- bit readBit()
- {
- uint i;
- bit b;
- ds = 0;
- i++;
- ds = 1;
- i++; i++;
- b = ds;
- i = 8;
- while(i>0) i--;
- return b;
- }
- unsigned char readByte()
- {
- uint i;
- uchar j, dat;
- dat = 0;
- for(i=0; i<8; i++)
- {
- j = readBit();
- dat = (j << 7) | (dat >> 1);
- }
- return dat;
- }
- void writeByte(unsigned char dat)
- {
- uint i;
- uchar j;
- bit b;
- for(j = 0; j < 8; j++)
- {
- b = dat & 0x01;
- dat >>= 1;
- if(b)
- {
- ds = 0; i++; i++;
- ds = 1;
- i = 8; while(i>0) i--;
- }
- else
- {
- ds = 0;
- i = 8; while(i>0) i--;
- ds = 1;
- i++; i++;
- }
- }
- }
- void sendChangeCmd()
- {
- dsInit();
- dsWait();
- delayMs(1);
- writeByte(0xcc); //只有一个18B20,不进行选择,直接读取数据
- writeByte(0x44); //启动温度转换
- }
- void sendReadCmd()
- {
- dsInit();
- dsWait();
- delayMs(1);
- writeByte(0xcc); //只有一个18B20,不进行选择,直接读取数据
- writeByte(0xbe); //度取数据的命令
- }
- int getTmpValue()
- {
- uint tmpvalue;
- int value;
- float t;
- unsigned char low, high;
- sendReadCmd();
- low = readByte();
- high = readByte();
- tmpvalue = high;
- tmpvalue <<= 8;
- tmpvalue |= low;
- value = tmpvalue;
- t = value * 0.0625; //每增加1,表示0.0625度
- value = t * 100 + (value > 0 ? 0.5 : -0.5); //大于0加0.5, 小于0减0.5
- return value;
- }
- void display(int v)
- {
- uchar count;
- uchar datas[] = {0, 0, 0, 0, 0};
- unsigned int tmp = v;
- datas[0] = tmp / 10000;
- datas[1] = tmp % 10000 / 1000;
- datas[2] = tmp % 1000 / 100;
- datas[3] = tmp % 100 / 10;
- datas[4] = tmp % 10;
- writeComm(0xc0+3);
- writeString("+ ", 2);
- temp1 = datas[1]*10 + datas[2]; //temp1用于对温度值大小进行判断
- if(datas[0] != 0)
- {
- writeData('0'+datas[0]);
- }
- for(count = 1; count != 5; count++)
- {
- writeData('0'+datas[count]);
- if(count == 2)
- {
- writeData('.');
- }
- }
- }
- /*****************************DS18B20*******************************/
- void main()
- {
- uchar table[] = " temperature is ";
- uchar table1[]= " warning ! ! !";
- beep = 1;
- sendChangeCmd();
- init();
- led_red = 0;
- led_green = 1;
- while(1)
- {
- int temp = getTmpValue();
- writeComm(0xc0);
- display( temp );
- sendChangeCmd();
- if(temp1 <= 28)//29度报警!!!
- {
- led_red = 0;
- led_green = 1;
- beep = 1;//关
- writeComm(0x80);
- writeString(table, 16);
- }
- else{
- beep = 0; //开
- led_red = 1;
- led_green = 0;
- writeComm(0x80);
- writeString(table1, 16);
- }
- key_scan();
- temperature();
- if(flag==0)
- { speed(a); }
- else
- { speed(b); }
- }
- }
复制代码 |