diff --git a/demos/bsp/boards/embedded_artists/board_ea4357.h b/demos/bsp/boards/embedded_artists/board_ea4357.h
index 0cef17358..138e6e199 100644
--- a/demos/bsp/boards/embedded_artists/board_ea4357.h
+++ b/demos/bsp/boards/embedded_artists/board_ea4357.h
@@ -66,8 +66,8 @@
 
 #include "oem_base_board/pca9532.h" // LEDs
 
-//#define CFG_PRINTF_TARGET       PRINTF_TARGET_SWO
-#define CFG_PRINTF_TARGET       PRINTF_TARGET_UART
+#define CFG_PRINTF_TARGET       PRINTF_TARGET_SWO
+//#define CFG_PRINTF_TARGET       PRINTF_TARGET_UART
 
 /*=========================================================================
     HARDWARE MAC ADDRESS
diff --git a/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvopt b/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvopt
index 7f2b43091..6d3c1ab8f 100644
--- a/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvopt
+++ b/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvopt
@@ -481,6 +481,22 @@
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
+    <File>
+      <GroupNumber>1</GroupNumber>
+      <FileNumber>6</FileNumber>
+      <FileType>1</FileType>
+      <tvExp>0</tvExp>
+      <Focus>0</Focus>
+      <ColumnNumber>0</ColumnNumber>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
+      <bDave2>0</bDave2>
+      <PathWithFileName>..\src\msc_app.c</PathWithFileName>
+      <FilenameWithoutPath>msc_app.c</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
   </Group>
 
   <Group>
@@ -491,7 +507,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>6</FileNumber>
+      <FileNumber>7</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -507,14 +523,14 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>7</FileNumber>
+      <FileNumber>8</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>38</ColumnNumber>
+      <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>41</TopLine>
-      <CurrentLine>45</CurrentLine>
+      <TopLine>40</TopLine>
+      <CurrentLine>56</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\bsp\boards\embedded_artists\board_ea4357.c</PathWithFileName>
       <FilenameWithoutPath>board_ea4357.c</FilenameWithoutPath>
@@ -523,7 +539,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>8</FileNumber>
+      <FileNumber>9</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -539,7 +555,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>9</FileNumber>
+      <FileNumber>10</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -555,7 +571,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>10</FileNumber>
+      <FileNumber>11</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -571,7 +587,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>11</FileNumber>
+      <FileNumber>12</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -587,7 +603,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>12</FileNumber>
+      <FileNumber>13</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -603,7 +619,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>13</FileNumber>
+      <FileNumber>14</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -619,7 +635,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>14</FileNumber>
+      <FileNumber>15</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -635,7 +651,7 @@
     </File>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>15</FileNumber>
+      <FileNumber>16</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -659,13 +675,13 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>16</FileNumber>
+      <FileNumber>17</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
       <ColumnNumber>30</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>26</TopLine>
+      <TopLine>27</TopLine>
       <CurrentLine>39</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\tusb.c</PathWithFileName>
@@ -675,7 +691,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>17</FileNumber>
+      <FileNumber>18</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -691,7 +707,7 @@
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     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>18</FileNumber>
+      <FileNumber>19</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -707,7 +723,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>19</FileNumber>
+      <FileNumber>20</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -723,14 +739,14 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>20</FileNumber>
+      <FileNumber>21</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>63</ColumnNumber>
+      <ColumnNumber>38</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>199</TopLine>
-      <CurrentLine>213</CurrentLine>
+      <TopLine>357</TopLine>
+      <CurrentLine>364</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\host\usbh.c</PathWithFileName>
       <FilenameWithoutPath>usbh.c</FilenameWithoutPath>
@@ -739,14 +755,14 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>21</FileNumber>
+      <FileNumber>22</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>3</ColumnNumber>
+      <ColumnNumber>18</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>586</TopLine>
-      <CurrentLine>596</CurrentLine>
+      <TopLine>584</TopLine>
+      <CurrentLine>606</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\host\ehci\ehci.c</PathWithFileName>
       <FilenameWithoutPath>ehci.c</FilenameWithoutPath>
@@ -755,7 +771,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>22</FileNumber>
+      <FileNumber>23</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -771,7 +787,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>23</FileNumber>
+      <FileNumber>24</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -787,7 +803,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>24</FileNumber>
+      <FileNumber>25</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -803,7 +819,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>25</FileNumber>
+      <FileNumber>26</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -819,7 +835,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>26</FileNumber>
+      <FileNumber>27</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -835,7 +851,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>27</FileNumber>
+      <FileNumber>28</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -851,7 +867,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>28</FileNumber>
+      <FileNumber>29</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -867,7 +883,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>29</FileNumber>
+      <FileNumber>30</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -883,7 +899,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>30</FileNumber>
+      <FileNumber>31</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -897,6 +913,22 @@
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
+    <File>
+      <GroupNumber>3</GroupNumber>
+      <FileNumber>32</FileNumber>
+      <FileType>1</FileType>
+      <tvExp>0</tvExp>
+      <Focus>0</Focus>
+      <ColumnNumber>0</ColumnNumber>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
+      <bDave2>0</bDave2>
+      <PathWithFileName>..\..\..\tinyusb\class\msc_host.c</PathWithFileName>
+      <FilenameWithoutPath>msc_host.c</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
   </Group>
 
   <Group>
@@ -907,7 +939,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>31</FileNumber>
+      <FileNumber>33</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -923,7 +955,7 @@
     </File>
     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>32</FileNumber>
+      <FileNumber>34</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -939,7 +971,7 @@
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     <File>
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-      <FileNumber>33</FileNumber>
+      <FileNumber>35</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -955,13 +987,13 @@
     </File>
     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>34</FileNumber>
+      <FileNumber>36</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
       <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>389</TopLine>
+      <TopLine>390</TopLine>
       <CurrentLine>406</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\bsp\lpc43xx\CMSIS_LPC43xx_DriverLib\src\lpc43xx_cgu.c</PathWithFileName>
@@ -971,13 +1003,13 @@
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     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>35</FileNumber>
+      <FileNumber>37</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
       <ColumnNumber>44</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>46</TopLine>
+      <TopLine>47</TopLine>
       <CurrentLine>60</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\bsp\lpc43xx\CMSIS_LPC43xx_DriverLib\src\system_LPC43xx.c</PathWithFileName>
@@ -987,7 +1019,7 @@
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     <File>
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-      <FileNumber>36</FileNumber>
+      <FileNumber>38</FileNumber>
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       <Focus>0</Focus>
@@ -1011,7 +1043,7 @@
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-      <FileNumber>37</FileNumber>
+      <FileNumber>39</FileNumber>
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@@ -1035,14 +1067,14 @@
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-      <FileNumber>38</FileNumber>
+      <FileNumber>40</FileNumber>
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       <Focus>0</Focus>
       <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>204</TopLine>
-      <CurrentLine>218</CurrentLine>
+      <TopLine>202</TopLine>
+      <CurrentLine>204</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\vendor\cmsis_rtos_rtx\RTX_Conf_CM.c</PathWithFileName>
       <FilenameWithoutPath>RTX_Conf_CM.c</FilenameWithoutPath>
@@ -1051,7 +1083,7 @@
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     <File>
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-      <FileNumber>39</FileNumber>
+      <FileNumber>41</FileNumber>
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       <tvExp>0</tvExp>
       <Focus>0</Focus>
diff --git a/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvproj b/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvproj
index a5f96d785..8c3553a82 100644
--- a/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvproj
+++ b/demos/host/host_cmsis_rtx/host_cmsis_rtx.uvproj
@@ -416,6 +416,11 @@
               <FileType>1</FileType>
               <FilePath>..\src\rndis_app.c</FilePath>
             </File>
+            <File>
+              <FileName>msc_app.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\src\msc_app.c</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -551,6 +556,11 @@
               <FileType>1</FileType>
               <FilePath>..\..\..\tinyusb\class\hid_host.c</FilePath>
             </File>
+            <File>
+              <FileName>msc_host.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\..\..\tinyusb\class\msc_host.c</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -1025,6 +1035,11 @@
               <FileType>1</FileType>
               <FilePath>..\src\rndis_app.c</FilePath>
             </File>
+            <File>
+              <FileName>msc_app.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\src\msc_app.c</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -1200,6 +1215,11 @@
               <FileType>1</FileType>
               <FilePath>..\..\..\tinyusb\class\hid_host.c</FilePath>
             </File>
+            <File>
+              <FileName>msc_host.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\..\..\tinyusb\class\msc_host.c</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
diff --git a/demos/host/host_freertos/host_freertos.uvopt b/demos/host/host_freertos/host_freertos.uvopt
index 39a67a860..b337afc73 100644
--- a/demos/host/host_freertos/host_freertos.uvopt
+++ b/demos/host/host_freertos/host_freertos.uvopt
@@ -331,7 +331,7 @@
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       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>97</TopLine>
+      <TopLine>98</TopLine>
       <CurrentLine>102</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\main.c</PathWithFileName>
@@ -379,8 +379,8 @@
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       <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>43</TopLine>
-      <CurrentLine>55</CurrentLine>
+      <TopLine>44</TopLine>
+      <CurrentLine>73</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\mouse_app.c</PathWithFileName>
       <FilenameWithoutPath>mouse_app.c</FilenameWithoutPath>
@@ -403,6 +403,22 @@
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
+    <File>
+      <GroupNumber>1</GroupNumber>
+      <FileNumber>6</FileNumber>
+      <FileType>1</FileType>
+      <tvExp>0</tvExp>
+      <Focus>0</Focus>
+      <ColumnNumber>0</ColumnNumber>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <TopLine>0</TopLine>
+      <CurrentLine>0</CurrentLine>
+      <bDave2>0</bDave2>
+      <PathWithFileName>..\src\msc_app.c</PathWithFileName>
+      <FilenameWithoutPath>msc_app.c</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
   </Group>
 
   <Group>
@@ -413,7 +429,7 @@
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     <File>
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-      <FileNumber>6</FileNumber>
+      <FileNumber>7</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -429,7 +445,7 @@
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     <File>
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-      <FileNumber>7</FileNumber>
+      <FileNumber>8</FileNumber>
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       <tvExp>0</tvExp>
       <Focus>0</Focus>
@@ -445,7 +461,7 @@
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-      <FileNumber>8</FileNumber>
+      <FileNumber>9</FileNumber>
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@@ -461,7 +477,7 @@
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@@ -477,7 +493,7 @@
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+      <FileNumber>11</FileNumber>
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       <Focus>0</Focus>
@@ -493,7 +509,7 @@
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-      <FileNumber>11</FileNumber>
+      <FileNumber>12</FileNumber>
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@@ -509,7 +525,7 @@
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     <File>
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-      <FileNumber>12</FileNumber>
+      <FileNumber>13</FileNumber>
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@@ -525,7 +541,7 @@
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+      <FileNumber>14</FileNumber>
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@@ -541,7 +557,7 @@
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+      <FileNumber>15</FileNumber>
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@@ -557,7 +573,7 @@
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-      <FileNumber>15</FileNumber>
+      <FileNumber>16</FileNumber>
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       <Focus>0</Focus>
@@ -575,13 +591,13 @@
 
   <Group>
     <GroupName>tinyusb</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
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     <RteFlg>0</RteFlg>
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-      <FileNumber>16</FileNumber>
+      <FileNumber>17</FileNumber>
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@@ -597,7 +613,7 @@
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-      <FileNumber>17</FileNumber>
+      <FileNumber>18</FileNumber>
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@@ -613,7 +629,7 @@
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     <File>
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-      <FileNumber>18</FileNumber>
+      <FileNumber>19</FileNumber>
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@@ -629,7 +645,7 @@
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-      <FileNumber>19</FileNumber>
+      <FileNumber>20</FileNumber>
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@@ -645,7 +661,7 @@
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-      <FileNumber>20</FileNumber>
+      <FileNumber>21</FileNumber>
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@@ -661,7 +677,7 @@
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-      <FileNumber>21</FileNumber>
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@@ -677,7 +693,7 @@
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@@ -693,7 +709,7 @@
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@@ -709,7 +725,7 @@
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@@ -725,7 +741,7 @@
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@@ -741,7 +757,7 @@
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@@ -757,7 +773,7 @@
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@@ -773,7 +789,7 @@
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@@ -789,7 +805,7 @@
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@@ -805,7 +821,7 @@
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@@ -819,6 +835,22 @@
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     </File>
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+      <FileNumber>32</FileNumber>
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+      <tvExpOptDlg>0</tvExpOptDlg>
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+      <CurrentLine>110</CurrentLine>
+      <bDave2>0</bDave2>
+      <PathWithFileName>..\..\..\tinyusb\class\msc_host.c</PathWithFileName>
+      <FilenameWithoutPath>msc_host.c</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
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@@ -829,13 +861,13 @@
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@@ -845,7 +877,7 @@
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@@ -861,7 +893,7 @@
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@@ -909,7 +941,7 @@
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@@ -1005,7 +1037,7 @@
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@@ -1021,7 +1053,7 @@
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diff --git a/demos/host/host_freertos/host_freertos.uvproj b/demos/host/host_freertos/host_freertos.uvproj
index f7a4215a4..ea93dd531 100644
--- a/demos/host/host_freertos/host_freertos.uvproj
+++ b/demos/host/host_freertos/host_freertos.uvproj
@@ -416,6 +416,11 @@
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@@ -551,6 +556,11 @@
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               <FilePath>..\..\..\tinyusb\class\hid_host.c</FilePath>
             </File>
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+              <FileType>1</FileType>
+              <FilePath>..\..\..\tinyusb\class\msc_host.c</FilePath>
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@@ -1055,6 +1065,11 @@
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             </File>
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