lcd12864.c

12864Lcd c51例子

#include <intrins.h>
#include <reg51.h>
#include <string.h>
#define uchar unsigned char
#define uint unsigned int
sbit	LCD_RS	= P2^7;
sbit	LCD_RW	= P2^6;
sbit	LCD_Elcm= P2^5;
#define LCD_DataPort P0			
#define LCD_Busy	0x80
#define SomeNOP(); _nop_();_nop_();_nop_();_nop_();
//////////////////////////
void LcdReset( void );
void ShowOneChar(uchar x,uchar y,uchar Wdata);
void ShowHexChar(uchar x,uchar y,uchar wdata);
void ShowMessage(uchar x,uchar y, uchar *ptr);
void ShowOneHZ(uchar x,uchar y,uint hz);
void ShowHZ(uchar x,uchar y,uchar *ptr);
void Delay1Ms(uint n );

void WaitForEnable( void );
void LcdWriteData( char dataW );
void LcdWriteCommand( uchar CMD,uchar AttribC );
void LocateXY( char posx,char posy);


///////////////////////////////////////////////////////////
void ShowMessage(uchar x,uchar y, uchar  *ptr)
{
	uchar i=0;
	while(ptr[i]>31)
	{
		ShowOneChar(x++,y,ptr[i]);
		if ( x==16 ){	x=0; y^=1;	}
	}
}
void ShowOneHZ(uchar x,uchar y,uint hz)
{
	LocateXY(x,y);		LcdWriteData((uchar)(hz>>8)); 	_nop_();_nop_();
	LcdWriteData((uchar)hz);	SomeNOP();
}
void ShowHZ(uchar x,uchar y,uchar *ptr)
{
	uchar i=0;
	while(ptr[i]>31)
	{	
		ShowOneHZ(x++,y,ptr[i]*256+ptr[i+1] );	i+=2;	
		if(x==16){	x=0; y++;	}	
	}
}
//=======================================================
// 显示光标定位
void LocateXY( char posx,char posy)
{
	uchar t;
	if(posy==0)				t=0x80;
	else if(posy==1)	t=0x90;
	else if(posy==2) 	t=0x88;
	else if(posy==3)	t=0x98;
	t|=(posx&0xf);
	LcdWriteCommand(t,0);
}
//=======================================================
// 按指定位置显示数出一个字符
void ShowOneChar(uchar x,uchar y,uchar wdata)
{

	LocateXY(x,y);				// 定位显示地址
	LcdWriteData(wdata);			// 写字符
	SomeNOP();
}
void ShowHexChar(uchar x,uchar y,uchar wdata)
{
	uchar code Hex_[]="0123456789ABCDEF";
	ShowOneChar(x,y,Hex_[(wdata>>4)&0x0f] );
	ShowOneChar(x+1,y,Hex_[wdata&0x0f] );
}
//=======================================================
// 初始化程序, 必须按照产品资料介绍的初始化过程进行
void LcdReset( void )
{
	LcdWriteCommand( 0x3B, 1);			// 显示模式设置(以后均检测忙信号)
 	LcdWriteCommand( 0x08, 1);			// 显示关闭
	LcdWriteCommand( 0x0c, 1);			// 显示开及光标设
	LcdWriteCommand( 0x06, 1);			// 显示光标移动设置
  LcdWriteCommand( 0x01, 1);			// 显示清屏
}
//=======================================================
// 写控制字符子程序: E=1 RS=0 RW=0
void LcdWriteCommand( uchar CMD,uchar AttribC )
{
	if (AttribC) WaitForEnable();				// 检测忙信号?
	LCD_RS = 0;	LCD_RW = 0; _nop_();
	LCD_DataPort = CMD; _nop_();					// 送控制字子程序
	LCD_Elcm = 1;_nop_();	_nop_();	LCD_Elcm = 0;			// 操作允许脉冲信号
}
//=======================================================
// 当前位置写字符子程序: E =1 RS=1 RW=0
void LcdWriteData( char dataW )
{
	WaitForEnable();							// 检测忙信号
	LCD_RS = 1; LCD_RW = 0; _nop_();
  LCD_DataPort = dataW; _nop_();
 	LCD_Elcm = 1; _nop_(); _nop_(); LCD_Elcm = 0;		// 操作允许脉冲信号
}
//=======================================================
//正常读写操作之前必须检测LCD控制器状态:	CS=1 RS=0 RW=1
//DB7:    0  LCD控制器空闲; 1  LCD控制器忙
void WaitForEnable( void )
{
	LCD_DataPort = 0xff;
	LCD_RS =0; LCD_RW = 1;_nop_();	LCD_Elcm = 1;// _nop_(); _nop_();
	while( LCD_DataPort & LCD_Busy );
	LCD_Elcm = 0;
}
////////////////延时 N MS 11.9592MHZ///////////////
void Delay1Ms(uint n)
{ uchar j;
	while(n--)
	{	j=210;	while(j--);	};
}