刚学会用Proteus，做了个秒表，请高手指点

ti

#include
#define T0HIGH 0xec
#define T0LOWW 0x8a
typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;
typedef bit  BOOL;
***it KEY_PIN = P2^0;
#define true 1
#define false 0
#define KEY_NULL 0
#define KEY_DOWN  0x80
#define KEY_LONG  0x40
#define KEY_UP 0x20
#define KEY_STATE_INIT  0
#define KEY_STATE_WOBBLE 1
#define KEY_STATE_PRESS  2
#define KEY_STATE_LONG  3
#define KEY_STATE_RELEASE 4
#define COUNT_INIT  0
#define COUNT_START  1
#define COUNT_STOP  2
code u8 DisCode[] = {0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90, 0xff};
u8 CouNum[4] = {0x00, 0x00, 0x00, 0x00};
u8 DisNum[4] = {0x0a, 0x0a, 0x00, 0x00};
u8 DisPosition = 0;
u8 SecCount = 0;
BOOL b10msEvent = false;
BOOL b100msEvent = false;
BOOL CountStart = false;
void Key_Prosess(void);
void LCD_Display(void);
void Counter(void);
main()
{
TMOD = 0x01;
TH0 = T0HIGH;
TL0 = T0LOWW;
TR0 = 1;
ET0 = 1;
EA = 1;
P1 = 0x00;
while(1)
{
  Key_Prosess();  //按键扫描
  if(b10msEvent == true)
  {
b10msEvent = false;
LCD_Display();  //动态显示
  }
  if(b100msEvent == true)
  {
b100msEvent = false;
if(CountStart == true)
Counter();  //计时
  }
}
}
void Num_Clear(void)
{
u8 i;
for(i=0; i<4; i++)
{
  CouNum = 0;
}
DisNum[0] = DisNum[1] = 0x0a;
DisNum[2] = DisNum[3] = 0x00;
}
u8 Key_Scan(void)
{
if(KEY_PIN == false)
  return (1);
return KEY_NULL;
}
u8 GetKey(void)
{
static u8 KeyState = KEY_STATE_INIT;
static u8 KeyTimeCount = 0;
static u8 LastKey = KEY_NULL; //保存按键释放时候的键值
u8 KeyTemp = KEY_NULL ;
KeyTemp = Key_Scan();
switch(KeyState)
{
  case KEY_STATE_INIT: //初始状态
if(KEY_NULL != KeyTemp) //有键按下
{
KeyState = KEY_STATE_WOBBLE; //进入消抖
}
break;
  case KEY_STATE_WOBBLE: //消抖
KeyState = KEY_STATE_PRESS;
break;
  case KEY_STATE_PRESS:
if(KEY_NULL != KeyTemp)
{
LastKey = KeyTemp; //保存键值,以便在释放按键状态返回键值
KeyTemp |= KEY_DOWN; //按键按下
KeyState = KEY_STATE_LONG;
}
else
{
KeyState = KEY_STATE_INIT;
}
break;
  case KEY_STATE_LONG:
if(KEY_NULL != KeyTemp)
{
if(++KeyTimeCount >= 100)
{
   KeyTimeCount = 0;
   LastKey |= KEY_LONG;
}
}
else
{
KeyState = KEY_STATE_RELEASE;
}
break;
  case KEY_STATE_RELEASE:
LastKey |= KEY_UP; //按键释放
KeyTemp = LastKey;
KeyState = KEY_STATE_INIT;
break;
  default:
break;
}
return KeyTemp;
}
void Key_Prosess(void)
{
u8 KeyData;
static u8 CountState = COUNT_INIT;
KeyData = GetKey();
if(KeyData == 0x81)
{
  switch(CountState)
  {
case COUNT_INIT: //开始计时
SecCount = 0;
TH0 = T0HIGH;
TL0 = T0LOWW;
CountStart = true;
CountState = COUNT_START;
break;
case COUNT_START: //停止计时
CountStart = false;
CountState = COUNT_STOP;
break;
case COUNT_STOP: //清零
Num_Clear();
CountState = COUNT_INIT;
break;
default:
break;
  }
}
}
void Counter(void)
{
u8 i;
if(++CouNum[3] == 10) //0.1秒
{
  CouNum[3] = 0;
  CouNum[2] += 1;
  if(CouNum[2] == 10)  //1秒
  {
CouNum[2] = 0;
CouNum[1] += 1;
if(CouNum[1] == 10)  //10秒
{
CouNum[1] = 0;
CouNum[0] += 1;
if(CouNum[0] == 10)  //100秒
   CouNum[0] = 0;
}
  }
}
for(i=0; i<2; i++)
{
  if(CouNum != 0)
break;
}
for(; i<4; i++)
{
  DisNum = CouNum;
}
}
void LCD_Display(void)
{
static u8 DisPinOn = 0x01;
DisPinOn <<= 1;
if(DisPinOn == 0x10)
{
  DisPosition = 0;
  DisPinOn = 0x01;
}
P0 = 0xff;
P1 = DisPinOn;
P0 = DisCode[DisNum[DisPosition++]];
if(DisPinOn == 0x04)
  P0 &= 0x7f;
}
void timer0(void) interrupt 1
{
TH0 = T0HIGH;
TL0 = T0LOWW;
b10msEvent = true;
if(++SecCount == 10)
{
  SecCount = 0;
  b100msEvent = true;
}
}