1602lcd_driver_bus.c

该压缩包内还有51单片机常用各类外设驱动C程序源码（128*64点阵屏

#include "AT89S52.H"
#include "CONFIG.H"
#include <intrins.h>
#include <absacc.h>
/*
#define BUSY XBYTE[0XFEFF]
#define WCMD XBYTE[0XFCFF]
#define WDAT XBYTE[0XFDFF]
*/
#define BUSY PBYTE[0XFE]
#define WCMD PBYTE[0XFC]
#define WDAT PBYTE[0XFD]


bit lcd_bz()       // 测试LCD忙碌状态
{							
ACC=BUSY;
return ACC_7;
}



void lcd_wcmd(uchar cmd)      	// 写入指令数据到LCD
{						
	while(lcd_bz());

    WCMD = cmd;

}


void lcd_wdat(uchar dat)	            //写入字符显示数据到LCD
{							
	while(lcd_bz());

	WDAT = dat;
  
}

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

void lcd_init()           //LCD初始化设定
{	
	lcd_wcmd(0x38);
	lcd_wcmd(0x0c);	
	lcd_wcmd(0x06);	
	lcd_wcmd(0x01);	
}