温度和超声波在1602上显示

ID:236125 · 发表于 2017-11-27 21:42

#include <reg52.h>
sbit lcdrs=P3^5;
sbit lcdrw=P3^6;
sbit lcden=P3^4;
sbit ds = P2^2;
sbit TRIG = P1^0;
sbit ECHO  =P1^1;
sbit beep=P2^3;
#define uint unsigned int
#define uchar unsigned char
void Timer1_Init();
unsigned int Get_Distance();
void delayms();
void write_com();
void write_data();
void lcd1602init();
int i;
float  shuru,value;
bit flag;
uint dValue,tmp,tmp1;
uchar code table[] = "tempure and juli:";
//uchar code lcdline2[]="Table Lam is" ;
//延时
void delayms(uint z)
{
      uint x,y;
      for(x=z;x>0;x--)
      for(y=110;y>0;y--);
}

//1602
void write_com(uchar com)
{
      lcdrs=0;
      lcdrw=0;
      lcden=0;
      P0=com;
      delayms(5);
      lcden=1;
      delayms(5);
      lcden=0;
}
void write_data(uchar dat)
{
      lcdrs=1;
      lcdrw=0;
      P0=dat;
      delayms(5);
      lcden=1;
      delayms(5);
      lcden=0;
}
void lcd1602init()
{
      write_com(0x38);
      write_com(0x0c);
      write_com(0x06);
      write_com(0x01);
}

//
void writeString(uchar * str, uchar length)
{
   uchar i;
   for(i = 0; i < length; i++)
   {
               write_data(str[i]);
   }
}

// ds18b20
void dsInit()
{

   unsigned int i;
   ds = 0;
   i = 100;
   while(i>0)
   i--;
   ds = 1;
   i = 4;
   while(i>0)
   i--;
}

bit readBit()
{
unsigned int i;
bit b;
ds = 0;
i++;
ds = 1;
i++;
i++;
b = ds;
i = 8;
while(i>0)
i--;
return b;
}

unsigned char readByte()
{
   unsigned int i;
   unsigned char j, dat;
   dat = 0;
   for(i=0; i<8; i++)
   {
      j = readBit();

      dat = (j << 7) | (dat >> 1);
   }
return dat;
}

void writeByte(unsigned char dat)
{
int i,j;
for(j=0;j<8;j++)
{
   ds=0;
   i++;
   ds=dat&0x01;
   i=6;
   while(i--);
   ds=1;
   dat>>=1;
   }
}

void sendChangeCmd()//温度转化命令
{
dsInit();
delayms(1);
writeByte(0xcc);
writeByte(0x44);
}

void sendReadCmd() //读取温度
{
dsInit();
delayms(1);
writeByte(0xcc);
writeByte(0xbe);
}

int getTmpValue()
{

unsigned int tmpvalue;
float t;
unsigned char low, high;
sendReadCmd();
low = readByte();
high = readByte();
tmpvalue = high;
tmpvalue <<= 8;
tmpvalue |= low;
value = tmpvalue;

t = value * 0.0625;

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()
{
      unsigned char count ;
      unsigned char datas[] = {0, 0, 0};
      tmp = Get_Distance();
      datas[0] = tmp/100 ;
      datas[1] = tmp%100/10;
      datas[2] = tmp%10;
      write_com(0xc0+12);
      for(count = 0; count < 3; count++)
      {
            write_data('0'+datas[count]); //写入能识别的字符 ’0‘+数值
      }
   if(tmp>200)
   {
      beep=0;
   }
   else
   {
      beep=1;
   }

}
void display1()
{
unsigned char count1;
unsigned char datas1[] = {0, 0, 0, 0, 0};
unsigned int tmp1 =getTmpValue();
datas1[0] = tmp1 / 10000;
datas1[1] = tmp1 % 10000 / 1000;
datas1[2] = tmp1 % 1000 / 100;
datas1[3] = tmp1 % 100 / 10;
datas1[4] = tmp % 10;

write_com(0xc0+1);
if(tmp1< 0)
{
      writeString("- ", 1);
}
else
{
   writeString("+ ", 1);
}
for(count1 = 1; count1 < 5; count1++)
{
      write_data('0'+datas1[count1]);
      if(count1 == 2)
      {
         write_data('.');
      }
}
if(tmp1>2000)
{
      P1=0x00;
   }
   else
   {
      P1=0xff;
   }
}
void main(void)
{

      lcd1602init();
      Timer1_Init();
      write_com(0x80);
      writeString(table,16);
      delayms(1000);
      while(1)
      {
      sendChangeCmd();//发送温度转化命令
         delayms(750); //温度转换时间需要750ms以上
         display1();
delayms(100);
         display();
         delayms(100);

  }
}
/***********开启定时器1并初始化***************/
void Timer1_Init(void)
{
      TMOD= 0x10;
      TH1=0;
      TL1=0;
      EA =1;
      TR1=0;
}
void Timer1_ISR() interrupt 3
{

      flag=1;
}

unsigned int Get_Distance()
{
      unsigned int distance;
      uint t=100;
      TRIG=1;
      while(t--);
      TRIG=0;
      while(!ECHO);
      flag=0;
      TR1=1;
      while(ECHO);
      TR1=0;
      distance=TH1*256+TL1;
      distance=distance*0.017;
      TH1=0;
      TL1=0;
      delayms(100);
      return distance;
}

帐号		自动登录	找回密码
密码			立即注册