LCD:1602 display program

#include

sbit RS=P3^7;
sbit RW=P3^6;
sbit E=P3^5;
sbit BF=P2^7;

void delay(unsigned char n) //about n(ms) delay
{
  unsigned char i,j,k;
  for(k=0;k     {
   for(j=0;j<10;j++) //about 1ms delay
     {
    for(i=0;i<32;i++) //about 0.1ms delay
     {;}
        }
    }
}

unsigned char test(void) //Busy check, test=1, busy. test=0, data and command operations are possible
{
  bit busy;
  RS=0;
  RW=1;
  E=1;
  _nop_();  
  _nop_()  
  ; _nop_();  
  _nop_();
  busy=BF;
  E=0;
  return busy;  
}

void WriteInstruction(unsigned char dictate)  //写指令、地址
{
  while(test()==1);
  RS=0;
  RW=0;
  E=0;
  _nop_();  
  _nop_();  
  _nop_();
  P2=dictate;
  _nop_();  
  _nop_();  
  _nop_();  
  _nop_();
  E=1;
  _nop_();  
  _nop_();  
  _nop_();  
  _nop_();
  E=0;
}

void wData(unsigned char dat) //写数据
{
  while(test()==1);
  RS=1;
  RW=0;
  E=0;
  _nop_();  
  _nop_();  
  _nop_(); _nop_();
  P2=dat;
  _nop_();   _nop_(
  );  
  _nop_();  
  _nop_();
  E=1;
  _nop_();  
  _nop_();  
  _nop_();  
  _nop_();
  E=0;
}

void WriteAddress(unsigned char x) //write address
{
  unsigned char x1;
  x1=x+0x80;
  WriteInstruction(x1);
// WriteInstruction(x|0x80); // another way to calculate address
}
  
void LcdInitiate(void) //LCD initialization
{
  delay(15);
  WriteInstruction(0x38);
  delay(5);
  WriteInstruction(0x38); 
  delay(5);
  WriteInstruction(0x38); 
  delay(5);

  WriteInstruction(0x0f); //Display setting
  delay(5);
  WriteInstruction(0x06); //Input mode
  delay(5);

  WriteInstruction(0x01);  //清屏
  delay(5);
  
}

main()
{
   unsigned char string[]={"my Computer"};
 unsigned char i=0;
  
  while(1)
   {
    LcdInitiate(); //Initialize  
    WriteAddress(0x02); //Write address, character display position
 i=0;
 while(string[i]!='\0') //Write string from write address
  {
    wData(string[i]); //Write a character
    i++;
    delay(200);
  }
    WriteAddress(0x42); //Write address
 delay(15);
 i=0;
 while(string[i]!='\0') //Write string from write address
  {
    wData(string[i]);
    i++;
    delay(200);
  }

 for(i=0;i<10;i++)
   {
     delay(200);
   } 
  }

}