?? lcd12864_c51.h
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/*********************************************************************/
/********* LCD12864_c51.H C51 driver *************/
/**************** Written by yinlei---20070801 ******************/
/*********************************************************************/
//#include <intrins.h>
/****************************控制定義*********************************/
#define LCD_BUSY_FLAG 0x80 //用于檢查寫忙信號
#define LCD12864_CG_MODE_EN 0 //圖形模式開關
#define LCD12864_PIXEL_EN 0 //安像素繪圖使能
/****************************端口定義*********************************/
#define DATAPORT P0 // 數據端口!!!!!!!!!!
sbit RS = P1^4;
sbit RW = P1^3;
sbit Elcd = P1^2;
//---------------------光標記錄
unsigned char LCDx=0;
unsigned char LCDy=0;
#if LCD12864_CG_MODE_EN
bit LCD12864_MODE_FLAG=0; //0普通模式 1擴展模式
#endif
/****************************外部函數*********************************/
void Init_Lcd12864(void); //LCD RESET
void ClearAS(void);
void ResetCursor(unsigned char x,unsigned char y); //光標歸零
void DispChar(unsigned char x,unsigned char y,unsigned char dataW);
char putchar (char a);
#if LCD12864_CG_MODE_EN
void ClearCG(void);
void DisplayPicBasic(unsigned char x_start,unsigned char y_start,unsigned char x_end,unsigned char y_end,unsigned char *table);
#if LCD12864_PIXEL_EN
void WritePixel(unsigned char x,unsigned char y,bit color);
bit ReadPixel(unsigned char x,unsigned char y);
#endif
#endif
/****************************內部函數*********************************/
void WaitForEnable(void); //忙信號檢測
void LcdWrite_C(unsigned char CMD,unsigned char AttribC);//write Control Charactor
void LcdWrite_D(char dataW); //寫一個數據
unsigned char LcdRead(void);//read a data from LCD
/****************************函數實現*********************************/
//-----------------初始化-------------------------------
void Init_Lcd12864(void)
{
unsigned char i=3;
while(i--)LcdWrite_C(0x30,0); //顯示模式設置（不測試忙信號）共三次
#if LCD12864_CG_MODE_EN
LcdWrite_C(0x34,1); //擴展模式-->圖形模式
ClearCG();
#else
LcdWrite_C(0x30,1);
#endif
LcdWrite_C(0x0f,1);//all on
LcdWrite_C(0x0c,1);//0x0f->all on,show arrow;0x0c->no arrow
ClearAS();
}
//-------------------------------------------------------------------
void ClearAS(void)
{
LcdWrite_C(0x01,1);
ResetCursor(0,0);
}
//-----------------------------------------------------------------------
void ResetCursor(unsigned char x,unsigned char y)
{
LCDx=x;
LCDy=y;
}
//=======================================================//
// 按指定位置顯示一個字符 //
//=======================================================//
void DispChar(unsigned char x,unsigned char y,unsigned char dataW)
{
unsigned char temp,t;
#if LCD12864_CG_MODE_EN
if(LCD12864_MODE_FLAG)
{
// LcdWrite_C(0x34,1); //擴充指令集 顯示關
LcdWrite_C(0x30,1); //command back
LCD12864_MODE_FLAG=0;
}
#endif
temp=x&0x0f;
temp=temp>>1; //temp/2
t=y>>1;
if(t)temp|=0x08; //2、3行操作
y&=0x01;
if(y)temp|=0x90; //奇數行
else temp|=0x80;
LcdWrite_C(temp,1);
if(x&0x01)LcdRead();
LcdWrite_D(dataW);
}
//-----------------------------------------------------------------------
char putchar (char a)
{
if(LCDx==16){LCDx=0;LCDy++;}
if(LCDy==4){LCDy=0;}
if(a!='\n')
{
DispChar(LCDx,LCDy,a);
LCDx++;
}
else{LCDx=0;LCDy++;}
return a;
}
//============================圖形模式==============================
//x_end-x_start:0~8,y_end-y_start:0~64(圖象大小為：(x_end-x_start)*16 X (y_end-y_start))
//&&!!x_end y_end 為圖象的末邊界+1
//==================================================================
#if LCD12864_CG_MODE_EN
void ClearCG(void)
{
unsigned char i,j;
if(~LCD12864_MODE_FLAG)
{
ClearAS();
LcdWrite_C(0x34,1); //擴充指令集 顯示關
LCD12864_MODE_FLAG=1;
}
for(j=0;j<64;j++)
{
if(j<32)
{
LcdWrite_C(0x80+j,1); //Y地址0
LcdWrite_C(0x80,1); //x地址0
}
else
{
LcdWrite_C(0x60+j,1); //Y地址0
LcdWrite_C(0x88,1); //x地址0
}
for(i=0;i<16;i++)
{
LcdWrite_D(0x00);
}
}
}
void DisplayPicBasic(unsigned char x_start,unsigned char y_start,unsigned char x_end,unsigned char y_end,unsigned char *table)
{
unsigned char temp_x=0,temp_y=0;
unsigned int temp;
if(~LCD12864_MODE_FLAG)
{
ClearAS();
LcdWrite_C(0x34,1); //擴充指令集 顯示關
LCD12864_MODE_FLAG=1;
}
for(temp_y=y_start;temp_y<y_end;temp_y++)
{
if(temp_y<32)
{
LcdWrite_C(0x80+temp_y,1); //Y地址0
LcdWrite_C(0x80+x_start,1); //x地址0
}
else
{
LcdWrite_C(0x60+temp_y,1); //Y地址0
LcdWrite_C(0x88+x_start,1); //x地址0
}
for(temp_x=x_start;temp_x<x_end;temp_x++)
{
temp=((temp_y-y_start)*(x_end-x_start)+(temp_x-x_start))*2;
//temp=(temp_y-y_start)*(x_end-x_start)+temp_x-x_start;
LcdWrite_D(*(table+temp));
LcdWrite_D(*(table+temp+1));
}
}
LcdWrite_C(0x36,1);
}
#if LCD12864_PIXEL_EN
void WritePixel(unsigned char x,unsigned char y,bit color)
{
unsigned char temp_x,temp;
if(~LCD12864_MODE_FLAG)
{
// ClearAS();
LcdWrite_C(0x36,1); //擴充指令集 顯示開
LCD12864_MODE_FLAG=1;
}
temp_x=x>>4;
if(y<32)
{
LcdWrite_C(0x80+y,1); //Y地址0
LcdWrite_C(0x80+temp_x,1); //x地址0
}
else
{
LcdWrite_C(0x60+y,1); //Y地址0
LcdWrite_C(0x88+temp_x,1); //x地址0
}
if(x&0x08)LcdRead();
LcdRead(); //空操作
temp=LcdRead();
if(color)temp|=(0x80>>(x&0x07));
else temp&=~(0x80>>(x&0x07));
//--------------------------------------------
if(y<32)
{
LcdWrite_C(0x80+y,1); //Y地址0
LcdWrite_C(0x80+temp_x,1); //x地址0
}
else
{
LcdWrite_C(0x60+y,1); //Y地址0
LcdWrite_C(0x88+temp_x,1); //x地址0
}
if(x&0x08)LcdRead();
LcdWrite_D(temp);
LcdWrite_C(0x36,1);
}
bit ReadPixel(unsigned char x,unsigned char y)
{
unsigned char temp_x,temp;
if(~LCD12864_MODE_FLAG)
{
// ClearAS();
LcdWrite_C(0x36,1); //擴充指令集 顯示開
LCD12864_MODE_FLAG=1;
}
temp_x=x>>4;
if(y<32)
{
LcdWrite_C(0x80+y,1); //Y地址0
LcdWrite_C(0x80+temp_x,1); //x地址0
}
else
{
LcdWrite_C(0x60+y,1); //Y地址0
LcdWrite_C(0x88+temp_x,1); //x地址0
}
if(x&0x08)LcdRead();
LcdRead(); //空操作
temp=LcdRead();
LcdWrite_C(0x36,1);
return temp&(0x80>>(x&0x07));
}
#endif
#endif
/****************************底層接口函數******************************/
//------------------------------------------------------//
//寫控制字符子程序: E=1 RS=0 RW=0
//------------------------------------------------------//
void LcdWrite_C( unsigned char CMD,unsigned char AttribC )
{
if (AttribC) WaitForEnable(); // 檢測忙信號?
RS = 0; RW = 0;
DATAPORT =CMD; // 送控制字子程序
Elcd = 1;Elcd = 0; // 操作允許脈沖信號
}
//------------------------------------------------------//
//當前位置寫字符子程序: E =1 RS=1 RW=0
//------------------------------------------------------//
void LcdWrite_D( char dataW )
{
WaitForEnable(); // 檢測忙信號
RS = 1; RW = 0;
DATAPORT = dataW;
Elcd = 1;Elcd = 0; // 操作允許脈沖信號
}
//------------------------------------------------------//
//讀模塊子程序：E=1 RS=1 RW=1
//------------------------------------------------------//
unsigned char LcdRead(void)
{
unsigned char dataW;
WaitForEnable(); // 檢測忙信號
// Elcd = 0;
// DATAPORT=0xff;
RS = 1; RW = 1;
Elcd = 1;
// for(dataW=0;dataW<100;dataW++);
dataW=DATAPORT;
Elcd = 0; // 操作允許脈沖信號
return dataW;
}
//------------------------------------------------------//
//正常讀寫操作之前必須檢測LCD控制器狀態: CS=1 RS=0 RW=1
//DB7: 0 LCD控制器空閑; 1 LCD控制器忙
//------------------------------------------------------//
void WaitForEnable( void )
{
DATAPORT = 0xff;
RS =0; RW = 1; Elcd = 1;
while( DATAPORT & LCD_BUSY_FLAG );
Elcd = 0;
}
/****************************End LCD12864_c51.H***************************/
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