cxh_temp_lcd.c

使用C所做的电子温度计,单片机采用89C51,使用LCD液晶显示,温度精度达小数点后两位,可根据实际室温对使用者进行温馨提示

#include <reg51.h>//用DS18B20检测温度，并用OCMJ2X8C串行显示程序！

#define uint  unsigned int
#define uchar unsigned char
#define x     0x80
#define y     0x80
#define comm  0
#define dat   1

sbit cs   = P3^6;
sbit std  = P3^5;
sbit sclk = P3^2;
sbit psb  = P3^3;   //H=并口; L=串口;
sbit rst  = P3^4;   //Reset Signal 低电平有效
sbit TMDAT= P2^6;

bit tsign;
bit flag;

void wr_lcd (uchar dat_comm,uchar content);
void delay (uint us);

uchar code tab1[]={
"  中国石油大学  "};

uchar code tab2[]={
"陈晓晖  05年10月 "
};

uchar code tab3[]={
"  当前温度为    "
};

uchar code tab4[]={
"夏天了  天气好热"};

uchar code tab5[]={
"要注意防暑降温啊"};

uchar code tab6[]={
"  今天温度适宜  "};

uchar code tab7[]={
"请出去活动一下吧"};

uchar code tab8[]={
"  今天天气好冷  "};

uchar code tab9[]={
"小心身体别感冒啊"};

uchar code tab10[]={
/*--  调入了一幅图像：F:\梁\画图\HOCO12832.bmp  --*/
/*--  宽度x高度=128x32  --*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x1E,0x00,0x00,0x00,0x00,0x00,0x07,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x7F,0x80,0x00,0x00,0x00,0x00,0x18,0x0C,0x00,0x00,0x01,0x00,0x00,0x00,0x00,
0x01,0xFF,0x80,0x00,0x00,0x00,0x00,0x20,0x00,0x00,0x00,0x13,0x10,0x03,0xFE,0x00,
0x03,0xFF,0xC0,0x00,0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x3F,0x30,0x1F,0xFF,0xC0,
0x03,0xFF,0xE0,0x00,0x00,0x00,0x00,0x8C,0x03,0xF0,0x00,0x7F,0xE0,0x7C,0x01,0xE0,
0x03,0xFF,0xF0,0x00,0x00,0x00,0x01,0x36,0x06,0xC0,0x00,0x5F,0xC0,0xFF,0xFC,0x60,
0x01,0xFF,0xF0,0x00,0x00,0x00,0x02,0x1B,0x0F,0x80,0x00,0xFF,0x01,0xFE,0x0F,0x30,
0x00,0xEF,0xF0,0x00,0x00,0x00,0x02,0x6D,0x9F,0x00,0x00,0x3E,0x03,0xFF,0xF1,0x90,
0x00,0xFF,0xF8,0x00,0x00,0x00,0x04,0x36,0xFE,0x00,0x01,0xFF,0x07,0xFF,0xFC,0x90,
0x00,0xEF,0xFF,0xFF,0x80,0x00,0x04,0xDB,0x7E,0x00,0x03,0xFF,0x87,0xFF,0xFC,0xD0,
0x00,0x0F,0xFF,0xFF,0xC0,0x00,0x04,0x6D,0xFC,0x00,0x07,0xFF,0x8F,0xFF,0xFE,0x50,
0x00,0x0F,0xFF,0xFF,0xE0,0x00,0x04,0x36,0xFC,0x10,0x07,0xFF,0x8F,0xFF,0xFE,0x90,
0x00,0x0F,0xFF,0xFF,0xE0,0x00,0x04,0x1B,0xF8,0x10,0x07,0xFF,0xCF,0xFF,0xFE,0x80,
0x00,0x0F,0xFF,0xFF,0xF0,0x00,0x04,0x0F,0xF8,0x10,0x07,0xFF,0xFF,0xFF,0xFA,0x00,
0x00,0x07,0xFF,0xFF,0xF0,0x00,0x04,0x07,0xF0,0x10,0x07,0xFF,0xFF,0xFF,0xFA,0x00,
0x00,0xFF,0xFF,0xFF,0xF8,0x00,0x02,0x03,0xF0,0x20,0x07,0xFF,0xFF,0xFF,0xBA,0x00,
0x00,0xFD,0xFF,0xFF,0xFC,0x00,0x02,0x03,0xF0,0x20,0x03,0xFF,0xFF,0xDF,0xB8,0x00,
0x00,0xC1,0xC0,0x3F,0xFC,0x00,0x01,0x01,0xE0,0x40,0x00,0xFF,0xFF,0xDF,0xB0,0x00,
0x00,0x81,0xC0,0x3F,0xCE,0x00,0x00,0x81,0xE0,0x80,0x00,0x7F,0xFF,0xDF,0xA0,0x00,
0x00,0x81,0x80,0x1D,0xCF,0x00,0x00,0x41,0xE1,0x00,0x00,0x3F,0xFF,0x9B,0x00,0x00,
0x01,0x83,0x80,0x1F,0xC7,0x80,0x00,0x21,0xE2,0x00,0x00,0x1F,0xFD,0xB6,0x00,0x00,
0x01,0xC3,0x00,0x0E,0xE6,0x80,0x00,0x19,0xEC,0x00,0x00,0x07,0xFE,0x20,0x00,0x00,
0x00,0xC3,0x00,0x07,0x67,0x40,0x00,0x07,0xF0,0x00,0x00,0x03,0x3E,0x00,0x00,0x00,
0x00,0x02,0x00,0x03,0xE7,0xA0,0x00,0x00,0x00,0x00,0x00,0x02,0x8E,0x00,0x00,0x00,
0x00,0x06,0x00,0x03,0x83,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x03,0x00,0x00,0x00,
0x00,0x06,0x00,0x07,0x03,0x00,0x77,0x46,0x74,0x24,0x80,0x06,0x04,0x00,0x00,0x00,
0x00,0x1C,0x00,0x06,0x00,0x00,0x55,0x45,0x54,0x57,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x1C,0x00,0x0E,0x00,0x00,0x45,0x45,0x74,0x57,0x80,0x08,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1C,0x00,0x00,0x55,0x45,0x44,0x74,0x80,0xF0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x38,0x00,0x00,0x77,0x76,0x47,0x54,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};







/*------------------初始化-----------------*/
void init_lcd (void)
{
  rst=1;
  psb=0;                  //串行
  wr_lcd (comm,0x30);  /*30---基本指令动作*/
  wr_lcd (comm,0x01);  /*清屏，地址指针指向00H*/
  delay (80);
  wr_lcd (comm,0x06);  /*光标的移动方向*/
  wr_lcd (comm,0x0c);  /*开显示，关游标*/
}
/*---------------显示汉字或字符----------------*/
void chn_disp1 (uchar code *chn)//在第一行写字
{
  uchar i,j;
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x80);
  j=0;
  for (i=0;i<16;i++)
  wr_lcd (dat,chn[j*16+i]);
}

void chn_disp2 (uchar code *chn)//在第二行写字
{
  uchar i,j;
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x90);
  j=0;
  for (i=0;i<16;i++)
  wr_lcd (dat,chn[j*16+i]);
}

/*----------------显示图形-----------------*/
void img_disp (uchar code *img)
{
  uchar i,j;
  for(j=0;j<32;j++)
  {
    for(i=0;i<8;i++)
    {
      wr_lcd(comm,0x34);
      wr_lcd(comm,y+j);
      wr_lcd(comm,x+i);
      wr_lcd(comm,0x30);
      wr_lcd(dat,img[j*16+i*2]);
      wr_lcd(dat,img[j*16+i*2+1]);
    }
  }
  wr_lcd(comm,0x36);
}

/*---------------------------------------*/
void wr_lcd (uchar dat_comm,uchar content)
{
  uchar a,i,j;
  delay (40);
  a=content;
  cs=1;
  sclk=0;
  std=1;
  for(i=0;i<5;i++)
  {
    sclk=1;
    sclk=0;
  }
  std=0;
  sclk=1;
  sclk=0;
  if(dat_comm)
    std=1;   //data
  else
    std=0;   //command
  sclk=1;
  sclk=0;
  std=0;
  sclk=1;
  sclk=0;
  for(j=0;j<2;j++)
  {
    for(i=0;i<4;i++)
    {
      a=a<<1;
      std=CY;
      sclk=1;
      sclk=0;
    }
    std=0;
    for(i=0;i<4;i++)
    {
      sclk=1;
      sclk=0;
    }
  }
}
/*---------------------------------------*/
void delay (uint us)   //delay time
{
  while(us--);
}


void dmsec(unsigned int count)
{
  unsigned int i;
  while(count--){
  for(i=0;i<125;i++){}
      }
}

void tmreset(void)
{
  unsigned int i;
  TMDAT=0;
  i=103;while(i>0) i--;
  TMDAT=1;
  i=4;while(i>0) i--;
}

void tmpre(void)
{
  unsigned int i;
  flag=0;
  while(TMDAT);
  i=32;
  while(i--)
  {
    if(TMDAT) {flag=1;break;}
  }
  i=4;while(i>0) i--;
}

bit tmrbit(void)  //read one bit
{
  bit tdat;
  unsigned int i;

  TMDAT=1;
  i++;
  TMDAT=0;i++;
  TMDAT=1;i++;i++;i++;
  tdat=TMDAT;
  i=8;
  while(i>0) i--;
  return(tdat);
}

unsigned char tmrbyte(void) //read one byte
{
  unsigned char i,j;
  unsigned char tdat=0;
  for(i=1;i<=8;i++)
  {
    j=tmrbit();
    tdat=(j<<7)|(tdat>>1);
  }
  return(tdat); 
}

void tmwbyte(unsigned char tdat)
{
  unsigned int i;
  unsigned char j;
  bit testb;
  TMDAT=1;i++;i++;
  for(j=1;j<=8;j++)
  {
    testb=tdat&0x01;
    tdat=tdat>>1;
    if(testb)
    {
      TMDAT=0;  //write 1
      i++;i++;
      TMDAT=1;
      i=8;while(i>0) i--;
    }
    else
    {
      TMDAT=0;   //write 0
      i=8;while(i>0) i--;
      TMDAT=1;
      i++;i++;
    } 
  } 
}

void tmstart(void)  //ds18b20 start convert
{
   do{ tmreset();
       tmpre();
	  }while(~flag);
   dmsec(1);
   tmwbyte(0xcc);   //skip rom
   tmwbyte(0x44);   //convert
}

unsigned int tmrtemp(void)  //read temp
{
   unsigned char a,b, y1,y2,y3;
   unsigned int t1=0x0000;
   float tt;
   unsigned int t;
   do{ tmreset();
       tmpre();
	 }while(~flag);
   dmsec(1);
   tmwbyte(0xcc);
   tmwbyte(0xbe);
   a=tmrbyte();
   b=tmrbyte();
   y1=a>>4;
   y2=b<<4;
   y3=y1|y2;
   if((y3>>7)==0x01) tsign=1;
   else tsign=0;
   t1=((t1|b)<<8)|(a&0x00ff)&0x07ff;
   tt=t1*0.0625;
   t=tt*100;
   return(t); 
}
/*------------------主程序--------------------*/
void main ()
{
  unsigned int last;
  unsigned char hsb,msb,lsb,dsb,gsb;
  
  SP=0x5f;
  init_lcd ();
  img_disp(tab10);
  dmsec(400);
  wr_lcd(comm,0x34);
  chn_disp1(tab1);
  chn_disp2(tab2);
  dmsec(400);
  while (1)
  {
    tmstart();
	dmsec(1000);
	last=tmrtemp();
	hsb=last/10000+0x30;
	msb=(last%10000)/1000+0x30;
	lsb=(last%1000)/100+0x30;
    dsb=(last%100)/10+0x30;
    gsb=(last%10)+0x30;
    chn_disp1(tab3);

    wr_lcd (comm,0x30);
    wr_lcd (comm,0x90);
	wr_lcd(dat,' ');
	 if(tsign)  wr_lcd(dat,'-');
	 else       wr_lcd(dat,'+');
	wr_lcd(dat,' ');
	if(hsb=='0') wr_lcd(dat,' ');
	else       wr_lcd(dat,'1');
    wr_lcd(dat,msb);
 	wr_lcd(dat,lsb);
    wr_lcd(dat,'.');
	wr_lcd(dat,dsb);
   	wr_lcd(dat,gsb); 
 	wr_lcd(dat,' ');   
	wr_lcd(dat,'o');
	wr_lcd(dat,'C');
    wr_lcd(dat,' ');
	wr_lcd(dat,' ');
	wr_lcd(dat,' ');
	wr_lcd(dat,' ');
	dmsec(2000);
    if(last>3000)
	{
	chn_disp1(tab4);
    chn_disp2(tab5);
	}
	else if(last>2000)
	{
    chn_disp1(tab6);
    chn_disp2(tab7);
	}
    else if(last<=2000)
    {
	chn_disp1(tab8);
    chn_disp2(tab9);
	}
	dmsec(1700);
  }
}