diff --git a/demos/bsp/boards/printf_retarget.c b/demos/bsp/boards/printf_retarget.c
index dd33d2dba..ee95f25ef 100644
--- a/demos/bsp/boards/printf_retarget.c
+++ b/demos/bsp/boards/printf_retarget.c
@@ -41,11 +41,11 @@
 #if CFG_PRINTF_TARGET != PRINTF_TARGET_SEMIHOST
 
 #if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
-  #define retarget_getchar()  board_uart_getchar()
+  #define retarget_getchar()     board_uart_getchar()
   #define retarget_putchar(c)    board_uart_putchar(c);
 #elif CFG_PRINTF_TARGET == PRINTF_TARGET_SWO
   volatile int32_t ITM_RxBuffer;  // keil variable to read from SWO
-	#define retarget_getchar()  ITM_ReceiveChar()
+	#define retarget_getchar()     ITM_ReceiveChar()
 	#define retarget_putchar(c)    ITM_SendChar(c)
 #else
 	#error Target is not implemented yet
@@ -68,17 +68,14 @@ int __sys_write (int iFileHandle, char *buf, int length)
 {
   (void) iFileHandle;
 
-  int ret = length;
   for (int i=0; i<length; i++)
   {
-    if (buf[i] == '\n')
-    {
-      retarget_putchar('\r');
-      ret++;
-    }
+    if (buf[i] == '\n') retarget_putchar('\r');
+
     retarget_putchar( buf[i] );
   }
-  return ret;
+
+  return length;
 }
 
 // Called by bottom level of scanf routine within RedLib C library to read
@@ -113,14 +110,14 @@ int fgetc(FILE *f)
 
 int fputc(int ch, FILE *f)
 {
-  _ttywrch(ch)
+  _ttywrch(ch);
   return ch;
 }
 
 //--------------------------------------------------------------------+
 // IAR
 //--------------------------------------------------------------------+
-#elif 0 // defined __ICCARM__ TODO could not able to retarget to UART with IAR
+#elif defined __ICCARM__ // TODO could not able to retarget to UART with IAR
 
 #if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
 #include <stddef.h>
@@ -133,18 +130,14 @@ size_t __write(int handle, const unsigned char *buf, size_t length)
   /* Check for stdout and stderr (only necessary if FILE descriptors are enabled.) */
   if (handle != 1 && handle != 2) return -1;
 
-  size_t ret = length;
   for (size_t i=0; i<length; i++)
   {
-    if (buf[i] == '\n')
-    {
-      board_uart_putchar('\r');
-      ret++;
-    }
-    board_uart_putchar( buf[i] );
+    if (buf[i] == '\n') retarget_putchar('\r');
+
+    retarget_putchar( buf[i] );
   }
 
-  return ret;
+  return length;
 }
 
 size_t __read(int handle, unsigned char *buf, size_t bufSize)
@@ -152,7 +145,7 @@ size_t __read(int handle, unsigned char *buf, size_t bufSize)
   /* Check for stdin (only necessary if FILE descriptors are enabled) */
   if (handle != 0) return -1;
 
-  /*size_t i;
+  size_t i;
   for (i=0; i<bufSize; i++)
   {
     uint8_t ch = board_uart_getchar();
@@ -160,8 +153,7 @@ size_t __read(int handle, unsigned char *buf, size_t bufSize)
     buf[i] = ch;
   }
 
-  return i; */
-  return 0;
+  return i;
 }
 
 #endif
diff --git a/demos/host/host_os_none/host_os_none.ewp b/demos/host/host_os_none/host_os_none.ewp
index eb221327f..e6a4e41ca 100644
--- a/demos/host/host_os_none/host_os_none.ewp
+++ b/demos/host/host_os_none/host_os_none.ewp
@@ -147,7 +147,7 @@
         </option>
         <option>
           <name>OGUseCmsis</name>
-          <state>1</state>
+          <state>0</state>
         </option>
         <option>
           <name>OGUseCmsisDspLib</name>
diff --git a/demos/host/host_os_none/host_os_none.uvopt b/demos/host/host_os_none/host_os_none.uvopt
index 254ccce89..1a696ba95 100644
--- a/demos/host/host_os_none/host_os_none.uvopt
+++ b/demos/host/host_os_none/host_os_none.uvopt
@@ -73,7 +73,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>0</IsCurrentTarget>
+        <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>
       <CpuCode>8</CpuCode>
       <Books>
@@ -738,7 +738,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>8</CpuCode>
       <Books>
@@ -926,7 +926,7 @@
       <Focus>0</Focus>
       <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>110</TopLine>
+      <TopLine>111</TopLine>
       <CurrentLine>112</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\main.c</PathWithFileName>
@@ -972,10 +972,10 @@
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>37</ColumnNumber>
+      <ColumnNumber>54</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>122</TopLine>
-      <CurrentLine>129</CurrentLine>
+      <TopLine>123</TopLine>
+      <CurrentLine>137</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\mouse_app.c</PathWithFileName>
       <FilenameWithoutPath>mouse_app.c</FilenameWithoutPath>
@@ -1006,7 +1006,7 @@
       <Focus>0</Focus>
       <ColumnNumber>38</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>144</TopLine>
+      <TopLine>135</TopLine>
       <CurrentLine>150</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\msc_app.c</PathWithFileName>
@@ -1484,9 +1484,9 @@
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>2</ColumnNumber>
+      <ColumnNumber>4</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>3184</TopLine>
+      <TopLine>3185</TopLine>
       <CurrentLine>3196</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\vendor\fatfs\ff.c</PathWithFileName>
@@ -1556,10 +1556,10 @@
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>3</ColumnNumber>
+      <ColumnNumber>22</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>0</TopLine>
-      <CurrentLine>0</CurrentLine>
+      <TopLine>79</TopLine>
+      <CurrentLine>88</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\bsp\boards\printf_retarget.c</PathWithFileName>
       <FilenameWithoutPath>printf_retarget.c</FilenameWithoutPath>
@@ -1694,7 +1694,7 @@
       <Focus>0</Focus>
       <ColumnNumber>30</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>145</TopLine>
+      <TopLine>146</TopLine>
       <CurrentLine>153</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\bsp\lpc43xx\startup_keil\startup_LPC43xx.s</PathWithFileName>
diff --git a/tinyusb/tusb.h b/tinyusb/tusb.h
index d7155b1f4..a9d624e2b 100644
--- a/tinyusb/tusb.h
+++ b/tinyusb/tusb.h
@@ -1,121 +1,122 @@
-/**************************************************************************/
-/*!
-    @file     tusb.h
-    @author   hathach (tinyusb.org)
-
-    @section LICENSE
-
-    Software License Agreement (BSD License)
-
-    Copyright (c) 2013, hathach (tinyusb.org)
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions are met:
-    1. Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the distribution.
-    3. Neither the name of the copyright holders nor the
-    names of its contributors may be used to endorse or promote products
-    derived from this software without specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
-    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
-    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-    INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND
-    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-    INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
-    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-	  This file is part of the tinyusb stack.
-*/
-/**************************************************************************/
-
-/** \file
- *  \brief Tiny USB header
- *
- *  \note Tiny USB header Note
- */
-
-#ifndef _TUSB_H_
-#define _TUSB_H_
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-//--------------------------------------------------------------------+
-// INCLUDE
-//--------------------------------------------------------------------+
-#include "common/common.h"
-#include "hal/hal.h"
-#include "osal/osal.h"
-
-//------------- HOST -------------//
-#if MODE_HOST_SUPPORTED
-  #include "host/usbh.h"
-
-  #if HOST_CLASS_HID
-    #include "class/hid_host.h"
-  #endif
-
-  #if TUSB_CFG_HOST_MSC
-    #include "class/msc_host.h"
-  #endif
-
-  #if TUSB_CFG_HOST_CDC
-    #include "class/cdc_host.h"
-  #endif
-
-  #if TUSB_CFG_HOST_CUSTOM_CLASS
-    #include "class/custom_class.h"
-  #endif
-
-#endif
-
-//------------- DEVICE -------------//
-#if MODE_DEVICE_SUPPORTED
-  #include "device/usbd.h"
-
-  #if DEVICE_CLASS_HID
-    #include "class/hid_device.h"
-  #endif
-
-  #if TUSB_CFG_DEVICE_CDC
-    #include "class/cdc_device.h"
-  #endif
-
-  #if TUSB_CFG_DEVICE_MSC
-    #include "class/msc_device.h"
-  #endif
-#endif
-
-
-//--------------------------------------------------------------------+
-// APPLICATION API
-//--------------------------------------------------------------------+
-tusb_error_t tusb_init(void);
-
-// TODO merge with tick_tock
-#if TUSB_CFG_OS == TUSB_OS_NONE
-void tusb_task_runner(void);
-#endif
-
-#if TUSB_CFG_OS == TUSB_OS_NONE && !defined(_TEST_)
-static inline void tusb_tick_tock(void) ATTR_ALWAYS_INLINE;
-static inline void tusb_tick_tock(void)
-{
-  osal_tick_tock();
-}
-#endif
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif /* _TUSB_H_ */
+/**************************************************************************/
+/*!
+    @file     tusb.h
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2013, hathach (tinyusb.org)
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+	  This file is part of the tinyusb stack.
+*/
+/**************************************************************************/
+
+/** \file
+ *  \brief Tiny USB header
+ *
+ *  \note Tiny USB header Note
+ */
+
+#ifndef _TUSB_H_
+#define _TUSB_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+//--------------------------------------------------------------------+
+// INCLUDE
+//--------------------------------------------------------------------+
+#include "common/common.h"
+#include "hal/hal.h"
+#include "osal/osal.h"
+
+//------------- HOST -------------//
+#if MODE_HOST_SUPPORTED
+  #include "host/usbh.h"
+
+  #if HOST_CLASS_HID
+    #include "class/hid_host.h"
+  #endif
+
+  #if TUSB_CFG_HOST_MSC
+    #include "class/msc_host.h"
+  #endif
+
+  #if TUSB_CFG_HOST_CDC
+    #include "class/cdc_host.h"
+  #endif
+
+  #if TUSB_CFG_HOST_CUSTOM_CLASS
+    #include "class/custom_class.h"
+  #endif
+
+#endif
+
+//------------- DEVICE -------------//
+#if MODE_DEVICE_SUPPORTED
+  #include "device/usbd.h"
+
+  #if DEVICE_CLASS_HID
+    #include "class/hid_device.h"
+  #endif
+
+  #if TUSB_CFG_DEVICE_CDC
+    #include "class/cdc_device.h"
+  #endif
+
+  #if TUSB_CFG_DEVICE_MSC
+    #include "class/msc_device.h"
+  #endif
+#endif
+
+
+//--------------------------------------------------------------------+
+// APPLICATION API
+//--------------------------------------------------------------------+
+tusb_error_t tusb_init(void);
+
+// TODO merge with tick_tock
+#if TUSB_CFG_OS == TUSB_OS_NONE
+void tusb_task_runner(void);
+#endif
+
+#if TUSB_CFG_OS == TUSB_OS_NONE && !defined(_TEST_)
+static inline void tusb_tick_tock(void) ATTR_ALWAYS_INLINE;
+static inline void tusb_tick_tock(void)
+{
+  osal_tick_tock();
+}
+#endif
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* _TUSB_H_ */
+