lcd2.c

基于C语言的DS18B20温度测量仪

/*-------------------------------------八线lcd1602驱动程序-------------------------------------------------*/
#include"lcd2.H"

void delay (uchar ms)//延时函数
{
uchar i;
while(ms--)
{for(i=0;i<100;i++);  //24m  延时1ms
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
 }
}
BOOL lcd_bz(void)//读忙
{
BOOL result;
rs=0;
rw=1;
ep=1;
delay(1);
result=(BOOL)(P1&0x80);
ep=0;
return result;
}

void lcd_wcmd(uchar cmd) //写指令
{
while(lcd_bz());
rs=0;
rw=0;
ep=0;
delay(1);
P1=cmd;
delay(1);
ep=1;
delay(1);
ep=0;
}

void lcd_pos(uchar pos)//设显示位置
{
 lcd_wcmd(pos |0x80);
 }

void lcd_wdat(uchar dat) //写数据
 {
 while(lcd_bz());
 rs=1;
 rw=0;
 ep=0;
 P1=dat;
delay(1);
 ep=1;
delay(1);
 ep=0;
 }

 void lcd_init(void) //初始化
 {
 lcd_wcmd(0x38);
 delay (10);
 lcd_wcmd(0x0c);
 delay(1);
 lcd_wcmd(0x06);
 delay(1);
 lcd_wcmd(0x01);
 delay(1);
 }

 void lcd_wchar(uchar x,uchar y,uchar dat)//写字符
  { if(y==2)
    { lcd_pos(x|0x40 );
	   }
	if(y==1)
	{ lcd_pos(x);
	    }
	  lcd_wdat(dat);}
 
void lcd_wdata(uchar x,uchar y,uint dat)// 写四位数字
  {	uchar ge,shi;
       //qian=dat/1000;
	   //bai=(dat/100)%10;
	   //shi=(dat/10)%10;
	   //ge=dat%10;
	   shi=dat/10;
	   ge=dat%10;
	    //qian|=0x30;
		//bai|=0x30;
		shi|=0x30;
		ge|=0x30;
		//lcd_wchar(x,y,qian);
		//lcd_wchar(x+1,y,bai);
		//lcd_wchar(x+2,y,shi);
		//lcd_wchar(x+3,y,ge);
		lcd_wchar(x,y,shi);
		lcd_wchar(x+1,y,ge);
		           }