jhd162.c

基于STC12系列的DS18B20温度传感控制,测试通过,可以用串口回传字符显示.

#include<reg52.h>
#include<intrins.h>

#define uchar unsigned char
#define uint  unsigned int

sbit dc=0xc4;       /*P4.4    LCD的RS*/
sbit rw=0xc5;       /*P4.5    LCD的R/W*/
sbit cs=0xc6;       /*P4.6    LCD的E*/
#define lcdbus P0   /*P0LCD  数据D0=P0.0*/ 

void soft_nop(){}


uchar lcd_checkbusy()    /*检查LCD忙*/
{  
	 register lcdstate;
   dc=0;
   rw=1;
   cs=1;
   soft_nop();
   lcdstate=lcdbus;
   cs=0;
   return((lcdstate&0x80));
}

void lcd_wrcmd(uchar lcdcmd) /*写LCD命令*/
{  
   while(lcd_checkbusy());
   lcdbus=lcdcmd;
   dc=0;
   rw=0;
   cs=1;
   soft_nop();
   cs=0;
   lcdbus=0xff;
}


void lcd_moveto(uchar  position) /*移动光标到:0-79*/
{  
	 register cmd=0x80;
   //lcdcounter=position;
   if(position>59)
	    position+=0x18;
	 else
	 {
	 	  if(position>39)
	 	  	position-=0x14;
	    else
	    {
	    	if(position>19)
	    		position+=0x2c;
	    }
	 }
   cmd=cmd|position;
   lcd_wrcmd(cmd);
}


void lcd_wrdata(uchar  lcddata)/*在当前显示位置显示数据*/  
{
   while(lcd_checkbusy());
   /*if(lcdcounter==20)
   {
   	  lcd_moveto(20);
      while(lcd_checkbusy());
   }
   if(lcdcounter==40)
   {
   	  lcd_moveto(40);
      while(lcd_checkbusy());
   }
   if(lcdcounter==60)
   {  
      lcd_moveto(60);
      while(lcd_checkbusy());
   }
   if(lcdcounter==80)
   { 
   	  lcd_moveto(0);
      while(lcd_checkbusy());
	    lcdcounter=0;
   }*/
   //lcdcounter++;
   lcdbus=lcddata;
   dc=1;
   rw=0;
   cs=1;
   soft_nop();
   cs=0;
   lcdbus=0xff;
}
//  position  显示地址
//  count     显示字符个数(包括空格)
//  *strpoint 字符串
void lcd_string(uchar  position,uchar count,uchar  *strpoint)  /*在指定位置显示LCD字符串*/
{  
	 uchar i;
	 lcd_moveto(position);
   for(i=0;i<count;i++)
   {
      lcd_wrdata(strpoint[i]);
   }    
}


void lcd_init() /*初始化*/
{  
	 lcd_wrcmd(0x38); /*设置8位格式,2行,5*7 */
   lcd_wrcmd(0x0c); /*整体显示,关光标,不闪烁*/
   lcd_wrcmd(0x06); /*设定输入方式,增量不移位*/
   lcd_wrcmd(0x01); /*清除显示*/
   //lcdcounter=0;
}


void lcd_cls() /*清除显示*/
{  
	 lcd_wrcmd(0x01);
  // lcdcounter=0;
}



/**********************************************************************/