#include <reg51.h> 
#include <intrins.h>
#include <absacc.h>

#define nop() _nop_()
#define LCM_Data P0 
#define Busy    0x80  //用于檢測LCM狀態字中的Busy標識
sbit LCM_RW=P1^1;     //定義LCD引腳
sbit LCM_RS=P1^0; 
sbit LCM_E=P1^2;
unsigned char code cdle_net[] = {"IIC_ISL12029RTC "};
/*unsigned char xdata *add;//這里定義是一定要注意數據類型，這里的類型是指地址里的內容的數據類型

unsigned char code lcdclr[] = {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
unsigned char code table[]  = {0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02,
                               0x0f,0x09,0x0f,0x09,0x0f,0x09,0x11,0x00,	
							   0x0f,0x09,0x09,0x0f,0x09,0x09,0x0f,0x00	

							   ,0x04,0x07,0x04,0x07,0x05,0x0f,0x11,0x1f,							   
							   0x04,0x1c,0x04,0x1c,0x00,0x18,0x00,0x1f,
							   0x0a,0x1f,0x0a,0x0e,0x0a,0x1f,0x0a,0x12,
							   0x1e,0x12,0x1e,0x12,0x1e,0x12,0x12,0x12};*/

//5ms延時
void Delay5Ms(void)
{
	unsigned int TempCyc = 5552;
	while(TempCyc--);
}

//400ms延時
void Delay200Ms(void)
{
	unsigned char TempCycA = 4;
	unsigned int TempCycB;
	while(TempCycA--)
		{
			TempCycB=5000;
			while(TempCycB--);
		};
}
//讀狀態
unsigned char ReadStatusLCM(void)
{
	LCM_Data=0xFF; 
	LCM_RS=0;
	LCM_RW=1;
	LCM_E=0;
	LCM_E=0;
	LCM_E=1;
	while(LCM_Data & Busy); //檢測忙信號
	return(LCM_Data);
}

//寫數據
void WriteDataLCM(unsigned char WDLCM) 
{
	ReadStatusLCM(); //檢測忙
	LCM_Data=WDLCM;
	LCM_RS=1;
	LCM_RW=0;
	LCM_E=0; //
	LCM_E=0; //延時
	LCM_E=1;
}

//寫指令
void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC為0時忽略忙檢測
{
	if (BuysC) 
	ReadStatusLCM(); //根據需要檢測忙
	LCM_Data = WCLCM;
	LCM_RS = 0;
	LCM_RW = 0;	
	LCM_E = 0;
	LCM_E = 0;
	LCM_E = 1;	
}

//按指定位置顯示一個字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
	Y &= 0x1;
	X &= 0xF; //限制X不能大于15，Y不能大于1
	if (Y) X |= 0x40; //當要顯示第二行時地址碼+0x40;
	X |= 0x80; //算出指令碼
	WriteCommandLCM(X, 1); //發命令字
	WriteDataLCM(DData); //發數據
}

void LCMInit(void) //LCM初始化
{
	LCM_Data=0;
	WriteCommandLCM(0x38,0); //三次顯示模式設置，不檢測忙信號
	Delay5Ms(); 
	WriteCommandLCM(0x38,0);
	Delay5Ms(); 
	WriteCommandLCM(0x38,0);
	Delay5Ms(); 

	WriteCommandLCM(0x38,1); //顯示模式設置,開始要求每次檢測忙信號
	WriteCommandLCM(0x08,1); //關閉顯示
	WriteCommandLCM(0x01,1); //顯示清屏
	WriteCommandLCM(0x06,1); // 顯示光標移動設置
	WriteCommandLCM(0x0C,1); // 顯示開及光標設置
}


//按指定位置顯示一串字符
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
	unsigned char ListLength;

    ListLength = 0;
	Y &= 0x1;
	X &= 0xF; //限制X不能大于15，Y不能大于1
	while (DData[ListLength]>0x20) //若到達字串尾則退出
		{
			if (X <= 0xF) //X坐標應小于0xF
				{
					DisplayOneChar(X, Y, DData[ListLength]); //顯示單個字符
					ListLength++;
					X++;
				}
		}
}

/*
void writecgram(unsigned char i,unsigned char *zwdata)
{ 
  unsigned char j;  
  WriteCommandLCM(0x40,1); //寫LCM CGRAM的起始地址。
  for(j=0;j<i;j++)
      WriteDataLCM(*zwdata++);
}
*/
void lcdinit()
{  
   unsigned char i;
   Delay200Ms(); //啟動等待，等LCM講入工作狀態
   LCMInit(); //LCM初始化
//   writecgram(24,&table[0]);
         
   DisplayListChar(0, 0,cdle_net);   //
   for(i=0;i<5;i++)     
       Delay200Ms();   
   for(i=0;i<16;i++)
       DisplayOneChar(i, 0,' ');            
}