求助，初學單片機寫了個程序，運行一段就不動了。

ID:64011 · 發表于 2014-7-21 08:44

#include<reg51.h>
#define BYTE unsigned char
BYTE str1[4]={"8051"};
BYTE str2[8]={"20140721"};
sbit rs=P2^0;
sbit rw=P2^1;
sbit e=P2^2;
void delay()
{
  unsigned char i,j;
  for(j=0;j<0xff;j++)
{
for(i=0;i<0xff;i++)
   {
  }
}
}
void busy_check()
{
  BYTE k;
  do
{rs=0;
  rw=1;
  e=1;
  delay();
  k=P0;
  e=0;}
while((k%0x80)&0x80==0x80);
}
void lcd_wrins(BYTE cmd)
{
  busy_check();
  rs=0;
  rw=0;
  e=0;
  P0=cmd;
  e=1;
  delay();
  e=0;
}
void lcd_wrdata(BYTE dat)
{
  busy_check();
  rs=1;
  rw=0;
  e=0;
  P0=dat;
  e=1;
  delay();
  e=0;
}
void lcd_init()
{
  lcd_wrins(0x38);
  delay();
  lcd_wrins(0x01);
  delay();
  lcd_wrins(0x06);
  delay();
  lcd_wrins(0x0C);
  delay();
}
void main()
{
  unsigned char i;
  lcd_init();
  lcd_wrins(0x80);
  for(i=0;i<4;i++)
{
lcd_wrdata(str1[i]);
}
  lcd_wrins(0xC0);
  for(i=0;i<8;i++);
   {
   lcd_wrdata(str2[i]);
}
while(1);
}