#include "Includes.h"
  	
/**************函數(shù)聲明***********************/
static void ReadStatusLCM(void);  
static void Delay_Xms(void);

/*****************寫數(shù)據(jù)***********************/ 
extern void WriteDataLCM(unsigned char date)	  
{
 ReadStatusLCM();  //檢測忙
 LCM_Data = date;
 Delay_Xms();
 LCM_RS = 1;
 LCM_RW = 0;
 LCM_E = 0;   //小的延時
 LCM_E = 1;
 
}

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

/******************讀忙狀態(tài)(1忙，0不忙)*************/
  void  ReadStatusLCM(void)	                                        
{
 LCM_Data = 0x00;
 Delay_Xms();
 LCM_RS = 0;
 LCM_RW = 1;
 LCM_E = 0;
 LCM_E = 1; 
 while(Busy); //檢測忙信號,忙則延時
}
/******************延時5ms *************/
void Delay_Xms(void)                                                  //約5ms延時
{  
   unsigned char i;
   for(i=0;i<27;i++){
                     TMOD=0X02;
                     TH0=0X38;   
                     TL0=0X38;         
                     EA=0X00; 
                     ET0=0X00;
                     TF0=0X00;
                     TR0=0X01;
                     while(TF0!=1);
                      }
} 

/*********************LCM初始化**************************/
extern void LCMInit(void)        
{
 WriteCommandLCM(0x01,0); //清除屏幕
 WriteCommandLCM(0x38,0); //兩次功能設置8位 單行 5*7不檢測忙信號
 Delay_Xms();
 WriteCommandLCM(0x38,0);
 Delay_Xms();
 WriteCommandLCM(0x01,1); //顯示清屏
 WriteCommandLCM(0x0C,1); // 控制光標，顯示 開，閃爍
 WriteCommandLCM(0x06,1); // 控制光標和文字的移動
 }

/********************顯示程序（對應地址寫入數(shù)據(jù)）********/
extern void display_lcm(unsigned char date,unsigned char address)                            
{
 WriteCommandLCM(address,1);
 WriteDataLCM(date);                 
}
/****************顯示字符串******************************/
extern void  diaplay_string( unsigned char a,unsigned char *adr)
 {
   unsigned char i=0;
   while(adr[i]!='\0')
        {
		  WriteCommandLCM(a,1);
          WriteDataLCM(adr[i]);
		  i++;
		  a++;
	    }
 }
/***********************END*******************************/