#ifndef __1602_H__
#define __1602_H__
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit LCM_RW=P3^1;   //定義引腳
sbit LCM_RS=P3^0;
sbit LCM_E=P3^2;
#define LCM_Data  P2    //數據線
#define Busy    0x80  //用于檢測LCM狀態字中的Busy標識
void dely(uint x);
void LCMreset(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
void WriteDataLCM(unsigned char WDLCM);
void WriteCommandLCM(unsigned char WCLCM,BuysC);

unsigned char ReadDataLCM(void);
unsigned char ReadStatusLCM(void);

unsigned char code line1[] = {"press the key"};
unsigned char code line2[] = {"input x,y:      "};
unsigned char code line3[] = {"input x,y,r:    "};
unsigned char code line4[] = {"save finished!!!"};
unsigned char code line5[] = {"wrong code!!!!!!"};

//寫數據
void WriteDataLCM(unsigned char WDLCM)
{
	ReadStatusLCM(); //檢測忙
	LCM_Data=WDLCM;
	LCM_RS=1;
	LCM_RW=0;
	LCM_E=0; //若晶振速度太高可以在這后加小的延時
	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;
}

//讀數據
unsigned char ReadDataLCM(void)
{
	LCM_RS = 1;
	LCM_RW = 1;
	LCM_E = 0;
	LCM_E = 0;
	LCM_E = 1;
	return(LCM_Data);
}

//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);
}

void LCMreset(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
	dely(5);
	WriteCommandLCM(0x38,0);
	dely(5);
	WriteCommandLCM(0x38,0);
	dely(5);

	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(0x0F,1); // 顯示開及光標設置
}

//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
}

//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]>0x1f) //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++;
				}
		}
}

//延時
void delay(uint t)
{uint i;
 for (i=0;i<t;i++);
}
/*void delay400ms(void)
{   delay(50000);
	delay(50000);
	delay(50000);
	delay(50000);
}*/

void dely(uint x)
{
  uchar j;
  while(x--)
  {
    for(j=0;j<125;j++)
	{;}
  }
}




#endif