command.c

基于51单片机系统

#include <at89x52.h>
#include "define.h"

void Delay(unsigned int n)
{
	unsigned int i;
	for(i=0; i<n; i++);
}

void LCDInitial()
{
	RS = 0;
	RW = 0;

	DATA = 0x3c;
	E = 1;
	Delay(10);
	E = 0;

	Delay(100);

	DATA = 0x0e;
	E = 1;
	Delay(10);
	E = 0;

	Delay(100);

	DATA = 0x06;
	E = 1;
	Delay(10);
	E = 0;

	Delay(100);

	DATA = 0x01;
	E = 1;
	Delay(10);
	E = 0;

	Delay(5000);

	DATA = 0x80;       
	E = 1;
	Delay(10);
	E = 0;

	Delay(100);
}

void ClearScr()
{
	RS = 0;
	RW = 0;

	DATA = 0x01;

	E = 1;
	Delay(10);
	E = 0;

	Delay(5000);
}

void ShiftLeft()
{
	RS = 0;
	RW = 0;

	DATA = 0x18;
	E = 1;
	Delay(10);
	E = 0;

	Delay(100);
}

void SetDDRAM(unsigned char addr)
{
	RS = 0;
	RW = 0;
	
	DATA = addr | 0x80;
	E = 1;
	Delay(10);
	E = 0;

	Delay(100);	
}

void WriteData(unsigned char LCDdata)
{
	RS = 1;
	RW = 0;

	E = 1;
	DATA = LCDdata;	
	Delay(10);
	E = 0;
	
	Delay(100);		
}