diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 04042f2..58c3910 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -1041,6 +1041,9 @@ void hg_scanner::working_done(void*)
 	case SCANNER_ERR_DEVICE_ISLOCK:
 			notify_ui_working_status(STATU_DESC_SCANNER_ERR_DEVICE_ISLOCK, SANE_EVENT_SCAN_FINISHED, status_);
 			break;
+	case SCANNER_ERR_DEVICE_AUTO_FAIL_OVER:
+			notify_ui_working_status(STATU_DESC_SCANNER_ERR_DEVICE_AUTO_FAIL_OVER, SANE_EVENT_SCAN_FINISHED, status_);
+		break;
 	default:
 			notify_ui_working_status(user_cancel_ ? STATU_DESC_SCAN_CANCELED : STATU_DESC_SCAN_STOPPED, SANE_EVENT_SCAN_FINISHED, status_);
 			break;
@@ -3386,6 +3389,7 @@ int hg_scanner::device_io_control(unsigned long code, void* data, unsigned* len)
 	}
 	else if (code == IO_CTRL_CODE_SET_AUTO_FALT)
 	{
+
 		return set_auto_flat();
 	}
 	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
diff --git a/hgdriver/hgdev/hg_scanner.h b/hgdriver/hgdev/hg_scanner.h
index 4a11b60..d056bc0 100644
--- a/hgdriver/hgdev/hg_scanner.h
+++ b/hgdriver/hgdev/hg_scanner.h
@@ -476,7 +476,7 @@ public:
     virtual int get_speed_mode(int &data) = 0;              //获取速度模式          /*/ 设备不同值不同，详情见子类注释   
     virtual int set_dpi_color_check(bool type);             //获取畸变矫正	  
     virtual int set_dpi_color_check_val(void) = 0;          //设置畸变矫正值	
-    virtual int set_auto_flat(void) ;                    //设置自动平场校正
+    virtual int set_auto_flat(void) = 0;                    //设置自动平场校正  
 };
 
 #ifdef UOS
diff --git a/hgdriver/hgdev/hg_scanner_200.cpp b/hgdriver/hgdev/hg_scanner_200.cpp
index cb1634a..670b3ac 100644
--- a/hgdriver/hgdev/hg_scanner_200.cpp
+++ b/hgdriver/hgdev/hg_scanner_200.cpp
@@ -63,6 +63,12 @@ namespace settingsdsp_200
 		case setting3288dsp::SIZE_ERROR:
 			code = SCANNER_ERR_DEVICE_SIZE_CHECK;
 			break;
+		case setting3288dsp::AUTO_FLAT_FINISHED:
+			code = SCANNER_ERR_DEVICE_AUTO_FAIL_OVER;
+			break;
+		case setting3288dsp::AUTO_FLATTING:
+			code = SCANNER_ERR_DEVICE_AUTO_FAIL_INFO;
+			break;
 		default:
 			if (fatal)
 				*fatal = false;
@@ -140,6 +146,42 @@ void hg_scanner_200::thread_handle_usb_read(void)
 		USBCB usb = {0};
 		ret = get_scanner_status(usb);
 
+		if (ret == SCANNER_ERR_DEVICE_AUTO_FAIL_OVER)
+		{
+			status_ = ret;
+			std::string msg;
+			int count = usb.u32_Count;
+			msg.resize(count);
+
+			ret = io_->read_bulk(&msg[0], &count);
+			if (ret == SCANNER_ERR_OK)
+				notify_ui_working_status(msg.c_str(), SANE_EVENT_STATUS, status_);
+			else
+				status_ = ret;
+
+			break;
+		}
+		else if (ret == SCANNER_ERR_DEVICE_AUTO_FAIL_INFO)
+		{
+			sw.reset();
+			status_ = ret;
+
+			std::string msg;
+			int count = usb.u32_Count;
+			msg.resize(count);
+			ret = io_->read_bulk(&msg[0], &count);
+			if (ret == SCANNER_ERR_OK)
+			{
+				char buf[1024];
+				strcpy(buf, msg.c_str());
+				notify_ui_working_status(buf, SANE_EVENT_STATUS, status_);
+			}
+			else
+			{
+				status_ = ret;
+				break;
+			}
+		}
 		if (ret == SCANNER_ERR_DEVICE_NOT_FOUND)
 		{
 			// device left, the work is no meanning ...
@@ -165,7 +207,7 @@ void hg_scanner_200::thread_handle_usb_read(void)
 			status_ = prev_err;
 			break;
 		}
-		else if(ret != SCANNER_ERR_OK)
+		else if(ret != SCANNER_ERR_OK && ret != SCANNER_ERR_DEVICE_AUTO_FAIL_INFO && ret != SCANNER_ERR_DEVICE_AUTO_FAIL_OVER)
 		{
 			if (prev_err == SCANNER_ERR_OK)
 			{
@@ -850,6 +892,25 @@ int hg_scanner_200::set_dpi_color_check_val(void)
 	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
 }
 
+int hg_scanner_200::set_auto_flat(void)
+{
+	USBCB usbcb = { setting3288dsp::START_FLAT,0,0 };
+	int len = sizeof(usbcb);
+	int ret = writeusb(usbcb);
+
+	if (ret == SCANNER_ERR_OK)
+	{
+		//status_ = SCANNER_ERR_DEVICE_BUSY;
+		wait_usb_.notify();
+		std::this_thread::sleep_for(std::chrono::milliseconds(300));
+		ret = try_third_app_after_start(ret);
+	}
+	else
+		status_ = ret;
+	VLOG_MINI_1(LOG_LEVEL_WARNING, "set_auto_flat ret: %s\n", hg_scanner_err_name(ret));
+	return ret;
+}
+
 int hg_scanner_200::set_notify_sleep()
 {
 	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
diff --git a/hgdriver/hgdev/hg_scanner_200.h b/hgdriver/hgdev/hg_scanner_200.h
index 431f2eb..6e74753 100644
--- a/hgdriver/hgdev/hg_scanner_200.h
+++ b/hgdriver/hgdev/hg_scanner_200.h
@@ -98,4 +98,5 @@ public:
 	virtual int set_speed_mode(int data) override;				 //设置速度模式          /*/ 不支持
 	virtual int get_speed_mode(int &data) override;				 //设置速度模式          /*/ 不支持
 	virtual int set_dpi_color_check_val(void) override;			 //设置畸变矫正		
+	virtual int set_auto_flat(void);							 //设置自动平场校正
 };
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 858844e..fcc260e 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -77,6 +77,14 @@ namespace settings
 		}
 		else if (ds->From == setting3399::HGType::STOPSCAN)
 			code = SCANNER_ERR_DEVICE_STOPPED;
+		else if (ds->From == setting3399::HGType::AutoCorrect)
+		{
+			if (ds->Code == 4)
+				code = SCANNER_ERR_DEVICE_AUTO_FAIL_OVER;
+			else
+				code = SCANNER_ERR_DEVICE_AUTO_FAIL_INFO;
+		}
+			
 
 		return code;
 	}
@@ -282,6 +290,34 @@ int hg_scanner_239::get_dpi_color_check_val(int &data)
 	int ret = read_register(ratio, &data);
 	return ret;
 }
+int hg_scanner_239::set_auto_flat(void)
+{
+	int color = 0,
+		ret = SCANNER_ERR_OK;
+	auto fw = get_firmware_version();
+	if ((fw[5] == 'A' && atoi(fw.substr(6, 4).c_str()) <= 9999))
+	{
+		color = 0 == 1 ? 1 : 0;  //暂时没有用。
+	}
+	if (!wait_usb_.is_waiting())
+	{
+		return SCANNER_ERR_DEVICE_BUSY;
+	}
+	else
+	{
+		ret = write_register(setting3399::SC_AUTOCORRECT, color);
+		if (ret != SCANNER_ERR_OK)
+		{
+			return ret;
+		}
+		//status_ = SCANNER_ERR_DEVICE_BUSY;
+		wait_usb_.notify();
+		std::this_thread::sleep_for(std::chrono::milliseconds(300));
+		ret = try_third_app_after_start(ret);
+	}
+	VLOG_MINI_1(LOG_LEVEL_WARNING, "set_auto_flat ret: %s\n", hg_scanner_err_name(ret));
+	return ret;
+}
 int  hg_scanner_239::get_status(void)
 {
 	int	val = 0,
@@ -889,7 +925,7 @@ int hg_scanner_239::on_scanner_closing(bool force)
 }
 void hg_scanner_239::thread_handle_usb_read(void)
 {
-	char		buf[64];
+	char		buf[1024];
 	setting3399::HGEIntInfo* info = (setting3399::HGEIntInfo*)buf;
 	int			size = sizeof(buf),
 				ret = SCANNER_ERR_OK,
@@ -951,7 +987,12 @@ void hg_scanner_239::thread_handle_usb_read(void)
 			status_ = settings::device_status_to_hg_err(info);
 			VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "status from interrupt point is '%s'\n", hg_scanner_err_name(status_));
 
-			if (status_ != SCANNER_ERR_OK && status_ != SCANNER_ERR_TIMEOUT && status_ != SCANNER_ERR_DEVICE_STOPPED)
+			if (status_ != SCANNER_ERR_OK 
+				&& status_ != SCANNER_ERR_TIMEOUT 
+				&& status_ != SCANNER_ERR_DEVICE_STOPPED
+				&& status_ != SCANNER_ERR_DEVICE_AUTO_FAIL_OVER
+				&& status_ != SCANNER_ERR_DEVICE_AUTO_FAIL_INFO
+				)
 			{
 				if (!is_dev_image_process_done() || (double_paper_handle_ & DOUBLE_PAPER_SAVE_IMG))
 				{
@@ -960,8 +1001,7 @@ void hg_scanner_239::thread_handle_usb_read(void)
 						std::this_thread::sleep_for(std::chrono::milliseconds(30));
 
 					StopWatch delay;
-					if((double_paper_handle_ & DOUBLE_PAPER_SAVE_IMG) &&
-						st == SCANNER_ERR_DEVICE_DOUBLE_FEEDING)
+					if((double_paper_handle_ & DOUBLE_PAPER_SAVE_IMG) && st == SCANNER_ERR_DEVICE_DOUBLE_FEEDING)
 					{
 						int wait = 3000 + (img_conf_.resolution_dst / 200 * 10000);
 						while (get_image_count() == 0)
@@ -1079,6 +1119,19 @@ void hg_scanner_239::thread_handle_usb_read(void)
 			//	stop();
 				break;
 			}
+			else if (info->From == setting3399::AutoCorrect)
+			{
+				std::string devs_info;
+				int len = info->Img_Index;
+				devs_info.resize(len);
+				ret = io_->read_bulk(&info[0], &len);
+				if (ret == SCANNER_ERR_OK)
+				{
+					notify_ui_working_status(devs_info.c_str(), SANE_EVENT_STATUS, status_);
+				}
+				if (status_ == SCANNER_ERR_DEVICE_AUTO_FAIL_OVER)
+					break;
+			}
 			else
 			{
 				// error handling ...
diff --git a/hgdriver/hgdev/hg_scanner_239.h b/hgdriver/hgdev/hg_scanner_239.h
index 1870b32..9abfd59 100644
--- a/hgdriver/hgdev/hg_scanner_239.h
+++ b/hgdriver/hgdev/hg_scanner_239.h
@@ -116,5 +116,6 @@ public:
 	virtual int get_speed_mode(int& data)override;               //获取速度模式          /*/ data:100,110,120
 	virtual int set_dpi_color_check_val(void) override;			 //设置畸变矫正值
 	virtual int get_dpi_color_check_val(int &data);			     //获取畸变矫正		
+	virtual int set_auto_flat(void);							 //设置自动平场校正
 };
 
diff --git a/hgdriver/hgdev/hg_scanner_300.cpp b/hgdriver/hgdev/hg_scanner_300.cpp
index 4e52291..97deb26 100644
--- a/hgdriver/hgdev/hg_scanner_300.cpp
+++ b/hgdriver/hgdev/hg_scanner_300.cpp
@@ -122,44 +122,58 @@ void hg_scanner_300::thread_handle_usb_read(void)
 			statu = last_usb_image_statu(ret);
 			savestatus_.push_back(ret);
 		}
-		//else if (ret != SCANNER_ERR_NO_DATA)
-		//{
-		//	statu = SANE_Image_Statu_OK;
-		//}
+		else if (ret != SCANNER_ERR_NO_DATA && ret != SCANNER_ERR_DEVICE_AUTO_FAIL_OVER && ret != SCANNER_ERR_DEVICE_AUTO_FAIL_INFO)
+		{
+			statu = SANE_Image_Statu_OK;
+		}
 		else if (ret == SCANNER_ERR_DEVICE_AUTO_FAIL_OVER)
 		{
+			status_ = ret;
 			std::string msg;
-			msg.resize(usb.u32_Count);
 			int count = usb.u32_Count;
-			io_->read_bulk(&msg[0], &count);
-			status_ = SCANNER_ERR_DEVICE_AUTO_FAIL_OVER;
-			//notify_ui_working_status(msg.c_str(), SANE_EVENT_STATUS, status_);
+			msg.resize(count);
+
+			ret = io_->read_bulk(&msg[0], &count);
+			if (ret == SCANNER_ERR_OK)
+				notify_ui_working_status(msg.c_str(), SANE_EVENT_STATUS, status_);
+			else
+				status_ = ret;
+
 			break;
 		}
 		else if (ret == SCANNER_ERR_DEVICE_AUTO_FAIL_INFO)
 		{
+			sw.reset();
+			status_ = ret;
+
 			std::string msg;
-			msg.resize(usb.u32_Count);
 			int count = usb.u32_Count;
-			io_->read_bulk(&msg[0], &count);
-			status_ = SCANNER_ERR_DEVICE_AUTO_FAIL_INFO;
-			char buf[1024];
-			strcpy(buf, msg.c_str());
-			notify_ui_working_status(buf, SANE_EVENT_STATUS, status_);
+			msg.resize(count);
+			ret = io_->read_bulk(&msg[0], &count);
+			if (ret == SCANNER_ERR_OK)
+			{
+				char buf[1024];
+				strcpy(buf, msg.c_str());
+				notify_ui_working_status(buf, SANE_EVENT_STATUS, status_);
+			}
+			else
+			{
+				status_ = ret;
+				break;
+			}
 		}
 
-		if (ret == SCANNER_ERR_NO_DATA && savestatus_.empty() && sw.elapsed_ms() > 5000)
+		if (sw.elapsed_ms() > 20000)//防止状态信息一直取不上来导致卡死
 		{
+			//3288固件 获取有纸无纸问题的bug，如果是打开盖子在start之前【主动】获取的话，会先报无纸，而不是开盖。
+			//但是在【端点】又获取不到有纸还是无纸的状态，所以只能通过等待超时，再来【主动】获取有无纸张。
 			SANE_Bool is_paperon = false;
-			get_scanner_paperon(is_paperon);
-			if (!is_paperon && !user_cancel_)
+			ret = get_scanner_paperon(is_paperon);  
+			if (!is_paperon && !user_cancel_ && ret == SCANNER_ERR_OK)
 			{
 				status_ = SCANNER_ERR_DEVICE_NO_PAPER;
 				break;
 			}
-		}
-		if (sw.elapsed_ms() > 20000)//防止状态信息一直取不上来导致卡死
-		{
 			status_ = !savestatus_.empty() ? savestatus_[0] : SCANNER_ERR_TIMEOUT;//以第一个消息为准
 			savestatus_.clear();
 			hg_log::log(LOG_LEVEL_WARNING, "get status timeout,get image out\n");
@@ -842,7 +856,7 @@ int hg_scanner_300::set_auto_flat(void)
 	int len = sizeof(usbcb);
 	int ret = writeusb(usbcb);
 	 
-	if (ret == SCANNER_ERR_OK)
+	if (ret == SCANNER_ERR_OK && wait_usb_.is_waiting())
 	{
 		//status_ = SCANNER_ERR_DEVICE_BUSY;
 		wait_usb_.notify();
diff --git a/hgdriver/hgdev/hg_scanner_302.cpp b/hgdriver/hgdev/hg_scanner_302.cpp
index cf75a9f..ec25cfd 100644
--- a/hgdriver/hgdev/hg_scanner_302.cpp
+++ b/hgdriver/hgdev/hg_scanner_302.cpp
@@ -1276,6 +1276,10 @@ int hg_scanner_302::set_dpi_color_check_val(void)
 
 		return write_register(retio, *(int*)&save_dpi_color_check_val);
 }
+int hg_scanner_302::set_auto_flat(void)
+{
+	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
+}
 int hg_scanner_302::set_notify_sleep()
 {
 	int val = 0,
diff --git a/hgdriver/hgdev/hg_scanner_302.h b/hgdriver/hgdev/hg_scanner_302.h
index 0c31297..9a590fd 100644
--- a/hgdriver/hgdev/hg_scanner_302.h
+++ b/hgdriver/hgdev/hg_scanner_302.h
@@ -121,4 +121,5 @@ public:
 	virtual int set_speed_mode(int data) override;				 //设置速度模式          /*/ data:40,50,60,70
 	virtual int get_speed_mode(int& data)override;               //获取速度模式          /*/ data:40,50,60,70
 	virtual int set_dpi_color_check_val(void) override;			 //设置畸变矫正		
+	virtual int set_auto_flat(void) override;                    //设置自动平场校正  
 };
diff --git a/hgdriver/hgdev/hg_scanner_400.cpp b/hgdriver/hgdev/hg_scanner_400.cpp
index ba9a368..2b42037 100644
--- a/hgdriver/hgdev/hg_scanner_400.cpp
+++ b/hgdriver/hgdev/hg_scanner_400.cpp
@@ -58,6 +58,12 @@ namespace settingsdsp_400
 		case setting3288dsp::SIZE_ERROR:
 			code = SCANNER_ERR_DEVICE_SIZE_CHECK;
 			break;
+		case setting3288dsp::AUTO_FLAT_FINISHED:
+			code = SCANNER_ERR_DEVICE_AUTO_FAIL_OVER;
+			break;
+		case setting3288dsp::AUTO_FLATTING:
+			code = SCANNER_ERR_DEVICE_AUTO_FAIL_INFO;
+			break;
 		default:
 				code = SCANNER_ERR_NO_DATA;
 			break;
@@ -118,18 +124,50 @@ void hg_scanner_400::thread_handle_usb_read(void)
 			statu = last_usb_image_statu(ret);
 			savestatus_.push_back(ret);
 		}
-		else
-			statu = SANE_Image_Statu_OK;
-		if (sw.elapsed_s() > 30)//防止状态信息一直取不上来导致卡死
+		else if (ret != SCANNER_ERR_NO_DATA && ret != SCANNER_ERR_DEVICE_AUTO_FAIL_OVER && ret != SCANNER_ERR_DEVICE_AUTO_FAIL_INFO)
 		{
-			if (!savestatus_.empty())
+			statu = SANE_Image_Statu_OK;
+		}
+		else if (ret == SCANNER_ERR_DEVICE_AUTO_FAIL_OVER)
+		{
+			status_ = ret;
+			std::string msg;
+			int count = usb.u32_Count;
+			msg.resize(count);
+
+			ret = io_->read_bulk(&msg[0], &count);
+			if (ret == SCANNER_ERR_OK)
+				notify_ui_working_status(msg.c_str(), SANE_EVENT_STATUS, status_);
+			else
+				status_ = ret;
+
+			break;
+		}
+		else if (ret == SCANNER_ERR_DEVICE_AUTO_FAIL_INFO)
+		{
+			sw.reset();
+			status_ = ret;
+
+			std::string msg;
+			int count = usb.u32_Count;
+			msg.resize(count);
+			ret = io_->read_bulk(&msg[0], &count);
+			if (ret == SCANNER_ERR_OK)
 			{
-				status_ = savestatus_[0];
+				char buf[1024];
+				strcpy(buf, msg.c_str());
+				notify_ui_working_status(buf, SANE_EVENT_STATUS, status_);
 			}
 			else
 			{
-				status_ = SCANNER_ERR_TIMEOUT;
+				status_ = ret;
+				break;
 			}
+		}
+
+		if (sw.elapsed_s() > 30)//防止状态信息一直取不上来导致卡死
+		{
+			status_ = !savestatus_.empty() ? savestatus_[0] : SCANNER_ERR_TIMEOUT;
 			savestatus_.clear();
 			hg_log::log(LOG_LEVEL_WARNING, "get status timeout,get image out\n");
 			break;
@@ -817,6 +855,26 @@ int hg_scanner_400::set_dpi_color_check_val(void)
 	//int ratio = cmd.u32_Data;
 	return ret;
 }
+
+int hg_scanner_400::set_auto_flat(void)
+{
+	USBCB usbcb = { setting3288dsp::START_FLAT,0,0 };
+	int len = sizeof(usbcb);
+	int ret = writeusb(usbcb);
+
+	if (ret == SCANNER_ERR_OK && wait_usb_.is_waiting())
+	{
+		//status_ = SCANNER_ERR_DEVICE_BUSY;
+		wait_usb_.notify();
+		std::this_thread::sleep_for(std::chrono::milliseconds(300));
+		ret = try_third_app_after_start(ret);
+	}
+	else
+		status_ = ret;
+	VLOG_MINI_1(LOG_LEVEL_WARNING, "set_auto_flat ret: %s\n", hg_scanner_err_name(ret));
+	return ret;
+}
+
 int hg_scanner_400::set_notify_sleep()
 {
 	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
diff --git a/hgdriver/hgdev/hg_scanner_400.h b/hgdriver/hgdev/hg_scanner_400.h
index 05bc318..30faa36 100644
--- a/hgdriver/hgdev/hg_scanner_400.h
+++ b/hgdriver/hgdev/hg_scanner_400.h
@@ -103,4 +103,5 @@ public:
 	virtual int set_speed_mode(int data) override;				 //设置速度模式          /*/ data:40,50,60,70，80
 	virtual int get_speed_mode(int &data) override;				 //设置速度模式          /*/ data:40,50,60,70，80
 	virtual int set_dpi_color_check_val(void) override;			 //设置畸变矫正		
+	virtual int set_auto_flat(void);						     //设置自动平场校正
 };
diff --git a/hgdriver/hgdev/hg_scanner_402.cpp b/hgdriver/hgdev/hg_scanner_402.cpp
index 5f55cb5..60dbef3 100644
--- a/hgdriver/hgdev/hg_scanner_402.cpp
+++ b/hgdriver/hgdev/hg_scanner_402.cpp
@@ -1236,6 +1236,10 @@ int hg_scanner_402::set_dpi_color_check_val(void)
 
 	return write_register(retio, *(int*)&save_dpi_color_check_val);
 }
+int hg_scanner_402::set_auto_flat(void)
+{
+	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
+}
 int hg_scanner_402::set_notify_sleep()
 {
 	int val = 0,
diff --git a/hgdriver/hgdev/hg_scanner_402.h b/hgdriver/hgdev/hg_scanner_402.h
index 549a5b1..ff37a29 100644
--- a/hgdriver/hgdev/hg_scanner_402.h
+++ b/hgdriver/hgdev/hg_scanner_402.h
@@ -121,4 +121,5 @@ public:
 	virtual int set_speed_mode(int data) override;				 //设置速度模式          /*/ data:40,50,60,70，80
 	virtual int get_speed_mode(int &data) override;				 //设置速度模式          /*/ data:40,50,60,70，80
 	virtual int set_dpi_color_check_val(void) override;			 //设置畸变矫正		
+	virtual int set_auto_flat(void) override;                    //设置自动平场校正  
 };