diff --git a/demos/bsp/boards/embedded_artists/board_ea4357.h b/demos/bsp/boards/embedded_artists/board_ea4357.h
index 586291406..3b0dc596c 100644
--- a/demos/bsp/boards/embedded_artists/board_ea4357.h
+++ b/demos/bsp/boards/embedded_artists/board_ea4357.h
@@ -65,6 +65,7 @@
 
 #include "oem_base_board/pca9532.h" // LEDs
 
+//#define CFG_PRINTF_TARGET       PRINTF_TARGET_SWO
 #define CFG_PRINTF_TARGET       PRINTF_TARGET_UART
 
 #ifdef __cplusplus
diff --git a/demos/bsp/boards/printf_retarget.c b/demos/bsp/boards/printf_retarget.c
index 227db8b65..5d72c1bd8 100644
--- a/demos/bsp/boards/printf_retarget.c
+++ b/demos/bsp/boards/printf_retarget.c
@@ -107,6 +107,16 @@ int __sys_readc (void)
 
 #elif defined __CC_ARM // keil
 
+#if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
+  #define retarget_putc(c)  board_uart_send(&c, 1);
+#elif CFG_PRINTF_TARGET == PRINTF_TARGET_SWO
+	#define retarget_putc(c)  ITM_SendChar(c)
+#else
+	#error Thach, did you forget something
+#endif
+
+
+
 struct __FILE {
   uint32_t handle;
 };
@@ -117,10 +127,10 @@ int fputc(int ch, FILE *f)
       ch == '\n')
   {
     const uint8_t carry = '\r';
-    board_uart_send(&carry, 1);
+    retarget_putc(carry);
   }
 
-  board_uart_send( (uint8_t*) &ch, 1);
+  retarget_putc(ch);
   
   return ch;
 }
@@ -131,10 +141,10 @@ void _ttywrch(int ch)
       ch == '\n')
   {
     const uint8_t carry = '\r';
-    board_uart_send(&carry, 1);
+    retarget_putc(carry);
   }
 
-  board_uart_send( (uint8_t*) &ch, 1);
+  retarget_putc(ch);
 }
 
 #endif
diff --git a/demos/host/host_os_none/host_os_none.uvopt b/demos/host/host_os_none/host_os_none.uvopt
index 6a4ffaa90..802b17479 100644
--- a/demos/host/host_os_none/host_os_none.uvopt
+++ b/demos/host/host_os_none/host_os_none.uvopt
@@ -145,12 +145,11 @@
         <SetRegEntry>
           <Number>0</Number>
           <Key>DLGUARM</Key>
-          <Name></Name>
         </SetRegEntry>
         <SetRegEntry>
           <Number>0</Number>
           <Key>JL2CM3</Key>
-          <Name>-U268003250 -O1006 -S8 -A0 -C0 -JU1 -JI127.0.0.1 -JP0 -RST0 -N00("ARM CoreSight SW-DP") -D00(2BA01477) -L00(0) -TO18 -TC10000000 -TP21 -TDS8004 -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -TB1 -TFE0 -FO15 -FD10000000 -FC800 -FN2 -FF0LPC18xx43xx_512_BA -FS01A000000 -FL080000 -FF1LPC18xx43xx_512_BB -FS11B000000 -FL180000</Name>
+          <Name>-U268003250 -O1006 -S8 -A0 -C0 -JU1 -JI127.0.0.1 -JP0 -RST0 -N00("ARM CoreSight SW-DP") -D00(2BA01477) -L00(0) -TO19 -TC72000000 -TP21 -TDS800B -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -TB5 -TFE0 -FO15 -FD10000000 -FC800 -FN2 -FF0LPC18xx43xx_512_BA -FS01A000000 -FL080000 -FF1LPC18xx43xx_512_BB -FS11B000000 -FL180000</Name>
         </SetRegEntry>
         <SetRegEntry>
           <Number>0</Number>
@@ -186,7 +185,7 @@
         <aLa>0</aLa>
         <aPa1>0</aPa1>
         <AscS4>0</AscS4>
-        <aSer4>0</aSer4>
+        <aSer4>1</aSer4>
         <StkLoc>0</StkLoc>
         <TrcWin>0</TrcWin>
         <newCpu>0</newCpu>
@@ -392,10 +391,10 @@
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>0</ColumnNumber>
+      <ColumnNumber>65</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>1</TopLine>
-      <CurrentLine>1</CurrentLine>
+      <TopLine>10</TopLine>
+      <CurrentLine>16</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\main.c</PathWithFileName>
       <FilenameWithoutPath>main.c</FilenameWithoutPath>
@@ -410,8 +409,8 @@
       <Focus>0</Focus>
       <ColumnNumber>24</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>41</TopLine>
-      <CurrentLine>42</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\cdc_serial_app.c</PathWithFileName>
       <FilenameWithoutPath>cdc_serial_app.c</FilenameWithoutPath>
@@ -426,8 +425,8 @@
       <Focus>0</Focus>
       <ColumnNumber>20</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>119</TopLine>
-      <CurrentLine>127</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\keyboard_app.c</PathWithFileName>
       <FilenameWithoutPath>keyboard_app.c</FilenameWithoutPath>
@@ -458,8 +457,8 @@
       <Focus>0</Focus>
       <ColumnNumber>12</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>2</TopLine>
-      <CurrentLine>10</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\rndis_app.c</PathWithFileName>
       <FilenameWithoutPath>rndis_app.c</FilenameWithoutPath>
@@ -530,8 +529,8 @@
       <Focus>0</Focus>
       <ColumnNumber>61</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>1</TopLine>
-      <CurrentLine>6</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\bsp\boards\embedded_artists\oem_base_board\pca9532.c</PathWithFileName>
       <FilenameWithoutPath>pca9532.c</FilenameWithoutPath>
@@ -638,7 +637,7 @@
 
   <Group>
     <GroupName>tinyusb</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -650,8 +649,8 @@
       <Focus>0</Focus>
       <ColumnNumber>1</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>58</TopLine>
-      <CurrentLine>69</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\tusb.c</PathWithFileName>
       <FilenameWithoutPath>tusb.c</FilenameWithoutPath>
@@ -714,8 +713,8 @@
       <Focus>0</Focus>
       <ColumnNumber>1</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>325</TopLine>
-      <CurrentLine>329</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\host\usbh.c</PathWithFileName>
       <FilenameWithoutPath>usbh.c</FilenameWithoutPath>
@@ -842,8 +841,8 @@
       <Focus>0</Focus>
       <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>206</TopLine>
-      <CurrentLine>214</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\class\cdc_host.c</PathWithFileName>
       <FilenameWithoutPath>cdc_host.c</FilenameWithoutPath>
@@ -858,8 +857,8 @@
       <Focus>0</Focus>
       <ColumnNumber>39</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>37</TopLine>
-      <CurrentLine>41</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\class\cdc_rndis_host.c</PathWithFileName>
       <FilenameWithoutPath>cdc_rndis_host.c</FilenameWithoutPath>
@@ -886,7 +885,7 @@
 
   <Group>
     <GroupName>cmsis</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -1002,8 +1001,8 @@
       <Focus>0</Focus>
       <ColumnNumber>5</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>145</TopLine>
-      <CurrentLine>153</CurrentLine>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\bsp\lpc43xx\startup_keil\startup_LPC43xx.s</PathWithFileName>
       <FilenameWithoutPath>startup_LPC43xx.s</FilenameWithoutPath>