diff --git a/Device/Port.cpp b/Device/Port.cpp
index a6c0480e..58c6a7f3 100644
--- a/Device/Port.cpp
+++ b/Device/Port.cpp
@@ -13,10 +13,10 @@ static bool Port_Reserve(Pin pin, bool flag);
 #ifdef REGION_Port
 Port::Port()
 {
-	_Pin	= P0;
-	Opened	= false;
-	Index	= 0;
-	State	= nullptr;
+	_Pin = P0;
+	Opened = false;
+	Index = 0;
+	State = nullptr;
 }
 
 #ifndef TINY
@@ -28,15 +28,15 @@ Port::~Port()
 
 String& Port::ToStr(String& str) const
 {
-	str	+= 'P';
-	if(_Pin == P0)
+	str += 'P';
+	if (_Pin == P0)
 	{
-		str	+= '0';
+		str += '0';
 	}
 	else
 	{
-		str	+= (char)('A' + (_Pin >> 4));
-		str	+= (byte)(_Pin & 0x0F);
+		str += (char)('A' + (_Pin >> 4));
+		str += (byte)(_Pin & 0x0F);
 	}
 	return str;
 }
@@ -45,35 +45,35 @@ String& Port::ToStr(String& str) const
 Port& Port::Set(Pin pin)
 {
 	// 如果引脚不变，则不做处理
-	if(pin == _Pin) return *this;
+	if (pin == _Pin) return *this;
 
 #ifndef TINY
 	// 释放已有引脚的保护
-	if(_Pin != P0) Close();
+	if (_Pin != P0) Close();
 #endif
 
-    _Pin = pin;
+	_Pin = pin;
 
 	return *this;
 }
 
 bool Port::Empty() const
 {
-	if(_Pin != P0) return false;
+	if (_Pin != P0) return false;
 
 	return true;
 }
 
 void Port::Clear()
 {
-	_Pin	= P0;
+	_Pin = P0;
 }
 
 // 确定配置,确认用对象内部的参数进行初始化
 bool Port::Open()
 {
-	if(_Pin == P0) return false;
-	if(Opened) return true;
+	if (_Pin == P0) return false;
+	if (Opened) return true;
 
 	TS("Port::Open");
 
@@ -94,8 +94,8 @@ bool Port::Open()
 
 void Port::Close()
 {
-	if(!Opened) return;
-	if(_Pin == P0) return;
+	if (!Opened) return;
+	if (_Pin == P0) return;
 
 	OnClose();
 
@@ -123,36 +123,37 @@ WEAK void Port::AFConfig(GPIO_AF GPIO_AF) const {}
 #if DEBUG
 // 引脚保留位，记录每个引脚是否已经被保留，禁止别的模块使用
 // !!!注意，不能全零，否则可能会被当作zeroinit而不是copy，导致得不到初始化
-static ushort Reserved[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF};
+static ushort Reserved[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF };
 
 // 保护引脚，别的功能要使用时将会报错。返回是否保护成功
 bool Port_Reserve(Pin pin, bool flag)
 {
 	debug_printf("::");
-    int port = pin >> 4, bit = 1 << (pin & 0x0F);
-    if (flag) {
-        if (Reserved[port] & bit) {
+	int port = pin >> 4, bit = 1 << (pin & 0x0F);
+	if (flag) {
+		if (Reserved[port] & bit) {
 			// 增加针脚已经被保护的提示，很多地方调用ReservePin而不写日志，得到False后直接抛异常
 			debug_printf("P%c%d 已被打开", _PIN_NAME(pin));
 			return false; // already reserved
 		}
-        Reserved[port] |= bit;
+		Reserved[port] |= bit;
 
 		debug_printf("打开 P%c%d", _PIN_NAME(pin));
-    } else {
-        Reserved[port] &= ~bit;
+	}
+	else {
+		Reserved[port] &= ~bit;
 
 		debug_printf("关闭 P%c%d", _PIN_NAME(pin));
 	}
 
-    return true;
+	return true;
 }
 
 /*// 引脚是否被保护
 bool Port::IsBusy(Pin pin)
 {
-    int port = pin >> 4, sh = pin & 0x0F;
-    return (Reserved[port] >> sh) & 1;
+	int port = pin >> 4, sh = pin & 0x0F;
+	return (Reserved[port] >> sh) & 1;
 }*/
 #endif
 
@@ -166,11 +167,11 @@ OutputPort::OutputPort() : Port() { }
 OutputPort::OutputPort(Pin pin) : OutputPort(pin, 2) { }
 OutputPort::OutputPort(Pin pin, byte invert, bool openDrain, byte speed) : Port()
 {
-	OpenDrain	= openDrain;
-	Speed		= speed;
-	Invert		= invert;
+	OpenDrain = openDrain;
+	Speed = speed;
+	Invert = invert;
 
-	if(pin != P0)
+	if (pin != P0)
 	{
 		Set(pin);
 		Open();
@@ -181,7 +182,7 @@ OutputPort& OutputPort::Init(Pin pin, bool invert)
 {
 	Port::Set(pin);
 
-	Invert	= invert;
+	Invert = invert;
 
 	return *this;
 }
@@ -192,27 +193,27 @@ void OutputPort::OnOpen()
 
 #if DEBUG
 	debug_printf(" %dM", Speed);
-	if(OpenDrain)
+	if (OpenDrain)
 		debug_printf(" 开漏");
 	else
 		debug_printf(" 推挽");
-	bool fg	= false;
+	bool fg = false;
 #endif
 
 	// 根据倒置情况来获取初始状态，自动判断是否倒置
 	bool rs = Port::Read();
-	if(Invert > 1)
+	if (Invert > 1)
 	{
-		Invert	= rs;
+		Invert = rs;
 #if DEBUG
-		fg		= true;
+		fg = true;
 #endif
 	}
 
 #if DEBUG
-	if(Invert)
+	if (Invert)
 	{
-		if(fg)
+		if (fg)
 			debug_printf(" 自动倒置");
 		else
 			debug_printf(" 倒置");
@@ -230,41 +231,41 @@ void OutputPort::OnOpen()
 
 WEAK bool OutputPort::ReadInput() const
 {
-	if(Empty()) return false;
+	if (Empty()) return false;
 
 	return Port::Read() ^ Invert;
 }
 
 void OutputPort::Up(uint ms) const
 {
-	if(Empty()) return;
+	if (Empty()) return;
 
-    Write(true);
+	Write(true);
 	Sys.Sleep(ms);
-    Write(false);
+	Write(false);
 }
 
 void OutputPort::Down(uint ms) const
 {
-	if(Empty()) return;
+	if (Empty()) return;
 
-    Write(false);
+	Write(false);
 	Sys.Sleep(ms);
-    Write(true);
+	Write(true);
 }
 
 void OutputPort::Blink(uint times, uint ms) const
 {
-	if(Empty()) return;
+	if (Empty()) return;
 
 	bool flag = true;
-    for(int i=0; i<times; i++)
+	for (int i = 0; i < times; i++)
 	{
 		Write(flag);
 		flag = !flag;
 		Sys.Sleep(ms);
 	}
-    Write(false);
+	Write(false);
 }
 
 /******************************** AlternatePort ********************************/
@@ -272,7 +273,7 @@ void OutputPort::Blink(uint times, uint ms) const
 AlternatePort::AlternatePort() : OutputPort(P0, false, false) { }
 AlternatePort::AlternatePort(Pin pin) : OutputPort(P0, false, false)
 {
-	if(pin != P0)
+	if (pin != P0)
 	{
 		Set(pin);
 		Open();
@@ -281,7 +282,7 @@ AlternatePort::AlternatePort(Pin pin) : OutputPort(P0, false, false)
 AlternatePort::AlternatePort(Pin pin, byte invert, bool openDrain, byte speed)
 	: OutputPort(P0, invert, openDrain, speed)
 {
-	if(pin != P0)
+	if (pin != P0)
 	{
 		Set(pin);
 		Open();
@@ -301,17 +302,17 @@ WEAK void AlternatePort::OpenPin() { OutputPort::OpenPin(); }
 InputPort::InputPort() : InputPort(P0) { }
 InputPort::InputPort(Pin pin, bool floating, PuPd pull) : Port()
 {
-	_task	= 0;
+	_task = 0;
 
 	//Handler	= nullptr;
 	//Param	= nullptr;
-	_Value	= 0;
+	_Value = 0;
 
-	_Start	= 0;
-	PressTime	= 0;
-	_Last	= 0;
+	_Start = 0;
+	PressTime = 0;
+	_Last = 0;
 
-	if(pin != P0)
+	if (pin != P0)
 	{
 		Set(pin);
 		Open();
@@ -327,7 +328,7 @@ InputPort& InputPort::Init(Pin pin, bool invert)
 {
 	Port::Set(pin);
 
-	Invert	= invert;
+	Invert = invert;
 
 	return *this;
 }
@@ -350,18 +351,18 @@ void InputPort::OnPress(bool down)
 	//if(down && _Value == Rising) return;
 	//if(!down && _Value != Rising) return;
 
-	UInt64	now	= Sys.Ms();
+	UInt64	now = Sys.Ms();
 	// 这一次触发离上一次太近，算作抖动忽略掉
-	if(_Last > 0 && ShakeTime > 0 && ((Int64)now - (Int64)_Last) < ShakeTime) return;
-	_Last	= now;
+	if (_Last > 0 && ShakeTime > 0 && ((Int64)now - (Int64)_Last) < ShakeTime) return;
+	_Last = now;
 
 	// 允许两个值并存
-	_Value	= down ? Rising : Falling;
+	_Value = down ? Rising : Falling;
 
-	if(down)
-		_Start	= now;
+	if (down)
+		_Start = now;
 	else
-		PressTime	= now - _Start;
+		PressTime = now - _Start;
 
 	/*if(down)
 	{
@@ -372,7 +373,7 @@ void InputPort::OnPress(bool down)
 		if((Mode & Falling) == 0) return;
 	}*/
 
-	if(HardEvent || !_IRQ)
+	if (HardEvent || !_IRQ)
 		Press(*this, down);
 	else
 		Sys.SetTask(_task, true, 0);
@@ -380,19 +381,23 @@ void InputPort::OnPress(bool down)
 
 void InputPort::InputTask(void* param)
 {
-	auto port	= (InputPort*)param;
-	byte v	= port->_Value;
-	if(!v) return;
+	auto port = (InputPort*)param;
+	byte v = port->_Value;
+	if (!v) return;
 
 	//v	&= port->Mode;
-	if(v & Rising)	port->Press(*port, true);
-	if(v & Falling)	port->Press(*port, false);
+	if (v & Rising)	port->Press(*port, true);
+	if (v & Falling)	port->Press(*port, false);
 }
 
-static void InputNoIRQTask(void* param)
+void InputPort::InputNoIRQTask(void* param)
 {
-	auto port	= (InputPort*)param;
-	port->OnPress(port->Read());
+	auto port = (InputPort*)param;
+	auto val = port->Read();
+	if (val == port->Val) return;
+	port->Val = val;
+
+	port->OnPress(val);
 }
 
 void InputPort::OnOpen()
@@ -400,19 +405,19 @@ void InputPort::OnOpen()
 	TS("InputPort::OnOpen");
 
 	// 如果不是硬件事件，则默认使用20ms抖动
-	if(!HardEvent && ShakeTime == 0) ShakeTime = 20;
+	if (!HardEvent && ShakeTime == 0) ShakeTime = 20;
 #if DEBUG
 	debug_printf(" 抖动=%dms", ShakeTime);
-	if(Floating)
+	if (Floating)
 		debug_printf(" 浮空");
-	else if(Pull == UP)
+	else if (Pull == UP)
 		debug_printf(" 上升沿");
-	else if(Pull == DOWN)
+	else if (Pull == DOWN)
 		debug_printf(" 下降沿");
 	//if(Mode & Rising)	debug_printf(" 按下");
 	//if(Mode & Falling)	debug_printf(" 弹起");
 
-	bool fg	= false;
+	bool fg = false;
 #endif
 
 	Port::OnOpen();
@@ -420,18 +425,18 @@ void InputPort::OnOpen()
 
 	// 根据倒置情况来获取初始状态，自动判断是否倒置
 	bool rs = Port::Read();
-	if(Invert > 1)
+	if (Invert > 1)
 	{
-		Invert	= rs;
+		Invert = rs;
 #if DEBUG
-		fg		= true;
+		fg = true;
 #endif
 	}
 
 #if DEBUG
-	if(Invert)
+	if (Invert)
 	{
-		if(fg)
+		if (fg)
 			debug_printf(" 自动倒置");
 		else
 			debug_printf(" 倒置");
@@ -451,21 +456,21 @@ void InputPort::OnClose()
 }
 
 // 输入轮询时间间隔。默认100ms，允许外部修改
-uint InputPort_Polling	= 100;
+uint InputPort_Polling = 100;
 
 bool InputPort::UsePress()
 {
 	assert(_Pin != P0, "输入注册必须先设置引脚");
 
-    _IRQ	= OnRegister();
+	_IRQ = OnRegister();
 
 	if (!_task && !HardEvent)
 	{
 		// 如果硬件中断注册失败，则采用10ms定时读取
-		if(_IRQ)
-			_task	= Sys.AddTask(InputTask, this, -1, -1, "输入事件");
+		if (_IRQ)
+			_task = Sys.AddTask(InputTask, this, -1, -1, "输入事件");
 		else
-			_task	= Sys.AddTask(InputNoIRQTask, this, InputPort_Polling, InputPort_Polling, "输入轮询");
+			_task = Sys.AddTask(InputNoIRQTask, this, InputPort_Polling, InputPort_Polling, "输入轮询");
 	}
 
 	return true;
diff --git a/Device/Port.h b/Device/Port.h
index a660a59e..2e5c54dd 100644
--- a/Device/Port.h
+++ b/Device/Port.h
@@ -184,16 +184,19 @@ protected:
 
 private:
 	bool	_IRQ	= false;
-	byte	_Value	= 0;	// 当前值
+	
 	uint	_task	= 0;	// 输入任务
 	UInt64	_Start	= 0;	// 开始按下时间
 	UInt64	_Last	= 0;	// 最后一次触发时间
 	static void InputTask(void* param);
+	static void InputNoIRQTask(void* param);
 
 private:
 	void OpenPin();
 	void ClosePin();
 	bool OnRegister();
+	byte	_Value = 0;	// 当前值
+	 bool	 Val = false;
 };
 
 /******************************** AnalogInPort ********************************/