fm12864.c

12864字符液晶程序

#include <reg51.h>
#include "FM12864.h"


void delay( unsigned char k )
{
	unsigned char i;
	for(i=0;i<k;i++)
		{
			_nop_();
		}
}

void Wait_Busy( void )
{
	unsigned char dat=0x80;
	while(dat&0x80!=0)
		{
			RS=0;
			RW=1;
			E=0;
			_nop_();
			E=1;
			P0=0xff;
			delay(2);
			E=0;
			dat=P0;
			delay(1);
		}

}

void Write_cmd( unsigned char cmd )
{
	Wait_Busy();
	RS=0;
	RW=0;
	delay(2);
	E=1;
	_nop_();
	P0=cmd;
	E=0;
	delay(2);
}

void Write_dat( unsigned char dat )
{
	Wait_Busy();
	RS=1;
	RW=0;
	E=1;
	P0=dat;
	delay(2);
	E=0;
	delay(5);
}

unsigned char Read( void )
{
	unsigned char dat;
	Wait_Busy();
	E=0;
	RS=1;
	RW=1;
	_nop_();
	E=1;
	P0=0xff;
	delay(2);
	E=0;
	dat=P0;
	_nop_();
	return( dat );
}

void init_lcd( void )
{
	unsigned char k;
	for(k=0;k<250;k++)
		{
			delay(255);
		}
	Write_cmd(0x30);	
	Write_cmd(0x30);	
	Write_cmd(0x0c);	
	Write_cmd(0x01);	
	Write_cmd(0x06);
	delay(100);
}