LCD显示闪烁问题

1万 · 2009-6-23 22:20

uchar code str1[]="aaaaaaaaaaaa";
uchar code str2[]="bbbbbbbbbbbb";
uchar code str3[]="cccccccccccc";
uchar code str4[]="dddddddddddd";
sbit KEY1=P1^1;
sbit KEY2=P1^2;
main()
{
  uchar stat=1;
  lcd_init();
  while(1)
  {
    switch(stat)
    {
      case 1:lcd_write_string(str1);
             if(KEY1==0){while(KEY1==0);stat=2;}
             if(KEY2==0){while(KEY2==0);stat=1;}
             break;
      case 2:lcd_write_string(str2);
             if(KEY1==0){while(KEY1==0);stat=3;}
             if(KEY2==0){while(KEY2==0);stat=1;}
             break;
      case 3:lcd_write_string(str3);
             if(KEY1==0){while(KEY1==0);stat=4;}
             if(KEY2==0){while(KEY2==0);stat=2;}
             break;
      case 4:lcd_write_string(str4);
             if(KEY1==0){while(KEY1==0);stat=1;}
             if(KEY2==0){while(KEY2==0);stat=3;}
             break;
      default:break;

    }
   }
}
按KEY1，KEY2 是能实现上下翻显示，但显示不稳，不停的闪，如何解决？