12864.h

12864显示计算器数字

#ifndef _12864_H_
#define _12864_H_
void delay(uint z)
{
	uint x,y;
	for(z=x;x>0;x--)
		for(y=10;y>0;y--);
}
void LCD_choose(uchar cs) //选屏
{
	switch(cs)
	{
		case 0:cs1=0;cs2=1;break;
		case 1:cs1=1;cs2=0;break;
		case 2:cs1=0;cs2=0;break;
		default:break;
	}
}
void LCD_check_busy()  //忙检查
{
	uchar state;
	rs=0;
	rw=1;
	do
	{
		P0=0x00;
		en=1;
		state=P0&0x80;
		en=0;
	}
	while(state==0x80);
}
void LCD_write_cmd(uchar cmd) //写命令
{
	LCD_check_busy();
	rs=0;
	rw=0;
	en=1;
	delay(5);
	P0=cmd;
	en=0;		  //形成一个脉冲
}
void LCD_write_data(uchar dat)	//写数据
{
	LCD_check_busy();
	rs=1;
	rw=0;
	delay(5);
	en=1;
	P0=dat;
	en=0;
}
void LCD_clear()  //清理全屏
{
	uchar i,k;
	LCD_choose(2);
	LCD_write_cmd(0xb8);
	LCD_write_cmd(0x40);
	for(i=0;i<8;i++) //八页，逐页清理
	{
		LCD_write_cmd(0xb8+i);
		for(k=0;k<64;k++)	 //每半屏64列，逐列清理
		{
		 	LCD_write_cmd(0x40+k);
			LCD_write_data(0x00);
		}
	}
}
void LCD_init()
{
	LCD_choose(2);
	LCD_write_cmd(0x3e); //关显示
	LCD_write_cmd(0xb8);  //第0页
	LCD_write_cmd(0xc0); //第0行
	LCD_write_cmd(0x40);  //第0列
	/*LCD_write_cmd(0x07);
	LCD_write_cmd(0x0f);
	LCD_write_cmd(0x01);*/
	LCD_write_cmd(0x3f);//开显示
}
uchar LCD_read_data(uchar page,uchar row)
{				   //从第page页，第row列读数据
	uchar dat;
	LCD_check_busy();
	LCD_write_cmd(0xb8+page);
	LCD_write_cmd(0x40+row);
	P0=0xff;
	rs=0;
	rw=1;
	en=1;
	en=0;
	en=1;
	dat=P0;
	en=0;
	return dat;
}
void LCD_display_dot(uchar cs,uchar page,uchar row)
{					  //写一个点
	uchar dat;
	LCD_choose(cs);
	dat=LCD_read_data(page/8,row);
	LCD_write_cmd(0xb8+page/8);
	LCD_write_cmd(0x40+row);
	LCD_write_data(1);
}
/*8X16点阵显示*/
void LCD_display8(uchar cs,uchar page,uchar row,uchar *s)
{							 
	uchar i;
	LCD_choose(cs);
	page<<=1; //八小页分成四大页
	row=row*8;//六十四列分八大列
	LCD_write_cmd(0xb8+page);//从第几行显示
	LCD_write_cmd(0x40+row); //从第几列显示，每扫描完一列，列会自动加一
	for	(i=0;i<8;i++)
		LCD_write_data(s[i]);//写数据
	LCD_write_cmd(0xb9+page);
	LCD_write_cmd(0x40+row);
	for(i=8;i<16;i++)
		LCD_write_data(s[i]);
}	
/*16X16点阵显示*/
void LCD_display16(uchar cs,uchar page,uchar row,uchar *s)
{
	uchar i;
	LCD_choose(cs);
	page<<=1;
	row=row*8;
	LCD_write_cmd(0xb8+page);
	LCD_write_cmd(0x40+row);
	for(i=0;i<16;i++)
		LCD_write_data(s[i]);
	LCD_write_cmd(0xb9+page);
	LCD_write_cmd(0x40+row);
	for(i=16;i<32;i++)
		LCD_write_data(s[i]);
}  	

/*void LCD_common_display(uchar page,uchar row,uchar line,uchar s[])
{
	uchar i;
	if(row<64)
	{
		LCD_choose(0);
		LCD_write_cmd(0xb8+page);
		LCD_write_cmd(0x40+row);
		if(page+row<64)
		{
			for(i=0;i<line;i++)
				LCD_write_data(s[i]);
		}
		else
		{
			for(i=0;i<64-row;i++)
			   	LCD_write_data(s[i]);
			
			LCD_choose(1);
			LCD_write_cmd(0xb8+page);
			LCD_write_cmd(0x40);
			for(i=row;i<line;i++)
			   	LCD_write_data(s[i]);
		}
	}
	else
	{
		LCD_choose(1);
		LCD_write_cmd(0xb8+page);
		LCD_write_cmd(0x40+row-64);
		for(i=0;i<line;i++)
			   	LCD_write_data(s[i]);
	}
}
void LCD_display8(uchar page,uchar row,uchar *s)
{
	LCD_common_display(page,row,8,s);
	LCD_common_display(page+1,row,8,s+8);
}*/  

#endif