12 1602

1602字符液晶滚动演示程序.zip

/***************   writer:shopping.w   ******************/
#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int

sbit RS = P2^0;
sbit RW = P2^1;
sbit EN = P2^2;

void Delayms(uint ms)
{
 	uchar i;
	while(ms--)
	{
	 	for(i=0;i<120;i++);
	}
}

uchar Busy_Check()
{
 	uchar LCD_Status;
	RS = 0;
	RW = 1;
	EN = 1;
	Delayms(1);
   	LCD_Status = P0;
	EN = 0;
	return LCD_Status;
}

void Write_LCD_Command(uchar cmd)
{
 	while((Busy_Check()&0x80)==0x80);
	RS = 0;
	RW = 0;
	EN = 0;
	P0 = cmd;
	EN = 1;
	Delayms(1);
	EN = 0;
}

void Write_LCD_Data(uchar dat)
{
 	while((Busy_Check()&0x80)==0x80);
	RS = 1;
	RW = 0;
	EN = 0;
	P0 = dat;
	EN = 1;
	Delayms(1);
	EN = 0;
}

void Initialize_LCD()
{
 	Write_LCD_Command(0x38);
	Delayms(1);	
	Write_LCD_Command(0x01);
	Delayms(1);	
	Write_LCD_Command(0x06);
	Delayms(1);	
	Write_LCD_Command(0x0c);
	Delayms(1);	
}

void ShowString(uchar x,uchar y,uchar *str)
{
 	uchar i = 0;
	if(y == 0)
		Write_LCD_Command(0x80 | x);
	if(y == 1)
		Write_LCD_Command(0xc0 | x);
	for(i=0;i<16;i++)
	{
	 	Write_LCD_Data(str[i]);	
	}
}