12864.c.120724184310

atmega128串行操作lcd12864

/*****************************************
 *文件名：lcd12864.c
 *功能：LCD12864串行方式AVR驱动程序
 *日期：2010年7月10日
 ****************************************/
#include <string.h> 
#include "12864.h"		//包含头文件

/*****************************************
 *函数名：delay_12864
 *功能：利用寄存器操作实现延时效果
 *参数：延时变量x
 *返回值：无
 ****************************************/

void delay_ms(uint x) 
{ 
	uint i,j; 
	for(j=0;j<x;j++)  
		for(i=0;i<1141;i++); 
}

void delay_us(uint x) 
{ 
	uint i,j; 
	for(j=0;j<x;j++)  
		for(i=0;i<40;i++); 
}

 
 
/*****************************************
 *函数名：send_command
 *功能：向LCD控制器的寄存器写指令
 *参数：指令command_data
 *返回值：无
 ****************************************/
void LCD_init(void)
{
delay_ms(20);
DDRE|=(1<<5);
//DDRE|=(1<<3);
DDRE|=(1<<1);
delay_ms(1);
Write_Command(0x30);//显示地址归位0x02
Write_Command(0x02);//选择基本指令集0x30
Write_Command(0x01);//光标关
Write_Command(0x08);
Write_Command(0x10);
Write_Command(0x38);
Write_Command(0x80);
Write_Command(0x0c);//开显示0x0c
}
 
//发送命令
void Write_Command(unsigned char CMD)
{
uchar command,i;
command=0xf8;
 
for(i=0;i<8;i++)//把数据送到线上去
{
  if(command&0x80)
    {SID_SET;}
  else
      {SID_CLE;}
delay_us(1);
 SCLK_CLE;
 delay_us(1);
 SCLK_SET;//时钟总线拉高，数据传送给显示屏
 delay_us(1);
 command=command<<1;//高位先发
}
delay_us(90);
command=CMD&0xf0;
 
for(i=0;i<8;i++)//把数据送到线上去
{
  if(command&0x80)
    {SID_SET;}
  else
      {SID_CLE;}
delay_us(1);
 SCLK_CLE;
 delay_us(1);
 SCLK_SET;//时钟总线拉高，数据传送给显示屏
 delay_us(1);
 command=command<<1;//高位先发
}
delay_us(90);
command=CMD<<4;
 
for(i=0;i<8;i++)//把数据送到线上去
{
  if(command&0x80)
    {SID_SET;}
  else
      {SID_CLE;}
delay_us(1);
 SCLK_CLE;
 delay_us(1);
 SCLK_SET;//时钟总线拉高，数据传送给显示屏
 delay_us(1);
 command=command<<1;//高位先发
}
delay_us(90);
}

//发送一个字符
void Write_one_char(unsigned char dat)
{
uchar date,i;
date=0xfa;
 
for(i=0;i<8;i++)//把数据送到线上去
{
  if(date&0x80)
    {SID_SET;}
  else
      {SID_CLE;}
delay_us(1);
 SCLK_CLE;
 delay_us(1);
 SCLK_SET;//时钟总线拉高，数据传送给显示屏
 delay_us(1);
 date=date<<1;//高位先发
}
delay_us(90);
date=dat&0xf0;
 
for(i=0;i<8;i++)//把数据送到线上去
{
  if(date&0x80)
    {SID_SET;}
  else
      {SID_CLE;}
delay_us(1);
 SCLK_CLE;
 delay_us(1);
 SCLK_SET;//时钟总线拉高，数据传送给显示屏
 delay_us(1);
 date=date<<1;//高位先发
}
delay_us(90);
date=dat<<4;
 
for(i=0;i<8;i++)//把数据送到线上去
{
  if(date&0x80)
    {SID_SET;}
  else
      {SID_CLE;}
delay_us(1);
 SCLK_CLE;
 delay_us(1);
 SCLK_SET;//时钟总线拉高，数据传送给显示屏
 delay_us(1);
 date=date<<1;//高位先发
}
delay_us(90);
}
 
//在指定的位置显示一个字母
void Lcd_putsachar(unsigned char x,unsigned char y,unsigned char dat)
{
switch(x)
    {
	case 0:
	   Write_Command(0x80);
	   Write_Command(0x80+y);
	   break;
	case 1:
	   Write_Command(0x90);
	   Write_Command(0x90+y);
	   break;
	case 2:
	   Write_Command(0x88);
	   Write_Command(0x88+y);
	   break;
	case 3:
	   Write_Command(0x98);
	   Write_Command(0x98+y);
	   break;
	 }
Write_one_char(dat);//写数据
}
//从指定的位置开始显示汉字或字符
void Lcd_puts_any(unsigned char x,unsigned char y,unsigned char *p)
{
unsigned char i;
switch(x)
    {
	case 0:
	   Write_Command(0x80);
	   Write_Command(0x80+y);
	   break;
	case 1:
	   Write_Command(0x90);
	   Write_Command(0x90+y);
	   break;
	case 2:
	   Write_Command(0x88);
	   Write_Command(0x88+y);
	   break;
	case 3:
	   Write_Command(0x98);
	   Write_Command(0x98+y);
	   break;
	 }
for(i=0;p[i]!='\0';i++)
	{
		Write_one_char(p[i]);
	}
}
void Write_One_Date(unsigned char CMD,unsigned char *p)
 {
 uchar i=0;
 Write_Command(CMD);
for(i=0;p[i]!='\0';i++)
	{
		Write_one_char(p[i]);
		delay_ms(100);
		Lcd_putsachar(0,5,'V');
	}
 }