lcm_162.c

这是一个LCM1602的驱动程序,加到自己的工程中可以直接使用,提供四个接口函数接口.

#include "LCM_162.h"

/*廷时函数,廷时100UM*/
void Lcd_delay(void)
{ unsigned char bt;
  for (bt=0;bt<200;bt++);
}


/*初时化函数*/
void Lcd_initialize(void)
{
 Lcd_delay();			   //等侍外部设备准备好.
 Lcd_delay();
 Lcd_delay();
 Lcd_e=low;
 Writecmd(0x3C);	   //工作方式为8位,2行显示,5*10字体.
 Writecmd(0x0C);		//显示开,光标关,标闪烁关

 Writecmd(0x06);	     //输入方式

 Writecmd(0x01);		   // 清屏


}

/*LCD判忙*/
bit Lcd_busy(void)
{ unchar i;
  Lcd_rs=low;
  Lcd_rw=high;
  Lcd_e=high;
  Lcd_delay();
  i=Lcddate;
  Lcd_e=low;
  return((bit)(i&0x80));
  }



/*写命令到LCD*/
void Writecmd(unchar command)
{
 while(Lcd_busy()) ; 
 Lcd_rs=low;
 Lcd_rw=low;		//为写入命令状态.
 Lcd_e=high;
 Lcddate=command;
 Lcd_delay();
 Lcd_e=low;
 Lcddate=0xFF;
}


/*使用CGRAM中的数据*/
void Lcd_string(unchar *date)
{
  unchar i=0;
 while(i<16)
 {
  Write_date(date[i]);
  i++;
  Lcd_delay();

  }
}


/*写入数据*/
void Write_date(unchar date)
{
  while(Lcd_busy()) ; 
  Lcddate=date;
  Lcd_e=low;
  Lcd_rs=high;
  Lcd_rw=low;
  Lcd_e=high;
  Lcd_delay();
  Lcd_e=low;
  Lcddate=0xFF;
}