diff --git a/demos/bsp/boards/board.h b/demos/bsp/boards/board.h
index 8becd677e..8ea13ade0 100644
--- a/demos/bsp/boards/board.h
+++ b/demos/bsp/boards/board.h
@@ -124,6 +124,8 @@ void board_leds(uint32_t on_mask, uint32_t off_mask);
 uint8_t  board_uart_getchar(void);
 void board_uart_putchar(uint8_t c);
 
+uint32_t board_buttons(void);
+
 extern volatile uint32_t system_ticks;
 
 #ifdef __cplusplus
diff --git a/demos/bsp/boards/lpcxpresso/board_lpcxpresso1769.c b/demos/bsp/boards/lpcxpresso/board_lpcxpresso1769.c
index 74d1451bf..675b393de 100644
--- a/demos/bsp/boards/lpcxpresso/board_lpcxpresso1769.c
+++ b/demos/bsp/boards/lpcxpresso/board_lpcxpresso1769.c
@@ -68,7 +68,6 @@ void board_init(void)
   //P0_21 instead of P2_9 as USB connect
 #endif
 
-#if CFG_UART_ENABLE
   //------------- UART init -------------//
 
   PINSEL_CFG_Type PinCfg =
@@ -91,7 +90,6 @@ void board_init(void)
 
 	UART_Init(BOARD_UART_PORT, &UARTConfigStruct);
 	UART_TxCmd(BOARD_UART_PORT, ENABLE); // Enable UART Transmit
-#endif
 }
 
 //--------------------------------------------------------------------+
@@ -111,8 +109,6 @@ void board_leds(uint32_t on_mask, uint32_t off_mask)
 //--------------------------------------------------------------------+
 // UART
 //--------------------------------------------------------------------+
-#if CFG_UART_ENABLE
-
 void board_uart_putchar(uint8_t c)
 {
   UART_Send(BOARD_UART_PORT, &c, 1, BLOCKING);
@@ -124,5 +120,3 @@ uint8_t  board_uart_getchar(void)
 }
 
 #endif
-
-#endif
diff --git a/demos/bsp/boards/microbuilder/board_rf1ghznode.c b/demos/bsp/boards/microbuilder/board_rf1ghznode.c
index d84ec962d..28e8e3cfd 100644
--- a/demos/bsp/boards/microbuilder/board_rf1ghznode.c
+++ b/demos/bsp/boards/microbuilder/board_rf1ghznode.c
@@ -40,18 +40,39 @@
 
 #if BOARD == BOARD_RF1GHZNODE
 
+#define LED_PORT                  (1)
+#define LED_PIN                   (31)
+#define LED_ON                    (0)
+#define LED_OFF                   (1)
+
+enum {
+  BOARD_BUTTON_COUNT =   1
+};
+
+const static struct {
+  uint8_t port;
+  uint8_t pin;
+} buttons[BOARD_BUTTON_COUNT] = { 0, 1 };
+
 void board_init(void)
 {
   SystemInit();
+
+#if TUSB_CFG_OS == TUSB_OS_NONE // TODO may move to main.c
   SysTick_Config(SystemCoreClock / CFG_TICKS_PER_SECOND); // 1 msec tick timer
+#endif
+
   GPIOInit();
 
-  GPIOSetDir(CFG_LED_PORT, CFG_LED_PIN, 1);
+  //------------- LED -------------//
+  GPIOSetDir(LED_PORT, LED_PIN, 1);
   board_leds(0x01, 0); // turn off the led first
 
-#if CFG_UART_ENABLE
+  //------------- BUTTON -------------//
+  for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) GPIOSetDir(buttons[i].port, buttons[i].pin, 0);
+
+  //------------- UART -------------//
   UARTInit(CFG_UART_BAUDRATE);
-#endif
 }
 
 //--------------------------------------------------------------------+
@@ -61,28 +82,34 @@ void board_leds(uint32_t on_mask, uint32_t off_mask)
 {
   if (on_mask & BIT_(0))
   {
-    GPIOSetBitValue(CFG_LED_PORT, CFG_LED_PIN, CFG_LED_ON);
+    GPIOSetBitValue(LED_PORT, LED_PIN, LED_ON);
   }else if (off_mask & BIT_(0))
   {
-    GPIOSetBitValue(CFG_LED_PORT, CFG_LED_PIN, CFG_LED_OFF);
+    GPIOSetBitValue(LED_PORT, LED_PIN, LED_OFF);
   }
 }
 
+//--------------------------------------------------------------------+
+// Buttons
+//--------------------------------------------------------------------+
+uint32_t board_buttons(void)
+{
+//  for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) GPIOGetPinValue(buttons[i].port, buttons[i].pin);
+  return GPIOGetPinValue(buttons[0].port, buttons[0].pin) ? 0 : 1; // button is active low
+}
+
 //--------------------------------------------------------------------+
 // UART
 //--------------------------------------------------------------------+
-#if CFG_UART_ENABLE
-uint32_t board_uart_send(uint8_t *buffer, uint32_t length)
+void board_uart_putchar(uint8_t c)
 {
-  UARTSend(buffer, length);
-  return length;
+  UARTSend(&c, 1);
 }
 
-uint32_t board_uart_recv(uint8_t *buffer, uint32_t length)
+uint8_t  board_uart_getchar(void)
 {
 //  *buffer = get_key(); TODO cannot find available code for uart getchar
   return 0;
 }
-#endif
 
 #endif
diff --git a/demos/bsp/boards/microbuilder/board_rf1ghznode.h b/demos/bsp/boards/microbuilder/board_rf1ghznode.h
index 2ebd4c293..258b50c0e 100644
--- a/demos/bsp/boards/microbuilder/board_rf1ghznode.h
+++ b/demos/bsp/boards/microbuilder/board_rf1ghznode.h
@@ -36,12 +36,6 @@
 */
 /**************************************************************************/
 
-/** \file
- *  \brief TBD
- *
- *  \note TBD
- */
-
 /** \ingroup TBD
  *  \defgroup TBD
  *  \brief TBD
@@ -60,12 +54,8 @@
 #include "lpc11uxx/LPC11Uxx_DriverLib/lpc11uxx_gpio.h"
 #include "lpc11uxx/LPC11Uxx_DriverLib/lpc11uxx_uart.h"
 
-#define CFG_PRINTF_TARGET PRINTF_TARGET_SEMIHOST
-
-#define CFG_LED_PORT                  (1)
-#define CFG_LED_PIN                   (31)
-#define CFG_LED_ON                    (0)
-#define CFG_LED_OFF                   (1)
+//#define CFG_PRINTF_TARGET             PRINTF_TARGET_SEMIHOST
+#define CFG_PRINTF_TARGET             PRINTF_TARGET_UART
 
 #ifdef __cplusplus
  }
diff --git a/demos/device/device_os_none/.cproject b/demos/device/device_os_none/.cproject
index 7733a45bf..cffaff255 100644
--- a/demos/device/device_os_none/.cproject
+++ b/demos/device/device_os_none/.cproject
@@ -121,7 +121,7 @@
 							<builder buildPath="${workspace_loc:/device_keyboard/Debug}" errorParsers="org.eclipse.cdt.core.GmakeErrorParser;org.eclipse.cdt.core.CWDLocator" id="com.crt.advproject.builder.exe.debug.1603637140" keepEnvironmentInBuildfile="false" managedBuildOn="true" name="Gnu Make Builder" superClass="com.crt.advproject.builder.exe.debug"/>
 							<tool id="com.crt.advproject.cpp.exe.debug.1912680765" name="MCU C++ Compiler" superClass="com.crt.advproject.cpp.exe.debug"/>
 							<tool command="arm-none-eabi-gcc" commandLinePattern="${COMMAND} ${FLAGS} ${CFLAGS} ${OUTPUT_FLAG}${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}" errorParsers="org.eclipse.cdt.core.GCCErrorParser" id="com.crt.advproject.gcc.exe.debug.901878888" name="MCU C Compiler" superClass="com.crt.advproject.gcc.exe.debug">
-								<option id="com.crt.advproject.gcc.arch.227583493" name="Architecture" superClass="com.crt.advproject.gcc.arch" value="com.crt.advproject.gcc.target.cm3" valueType="enumerated"/>
+								<option id="com.crt.advproject.gcc.arch.227583493" name="Architecture" superClass="com.crt.advproject.gcc.arch" value="com.crt.advproject.gcc.target.cm0" valueType="enumerated"/>
 								<option id="com.crt.advproject.gcc.thumb.1429919562" name="Thumb mode" superClass="com.crt.advproject.gcc.thumb" value="true" valueType="boolean"/>
 								<option id="gnu.c.compiler.option.preprocessor.def.symbols.690334585" name="Defined symbols (-D)" superClass="gnu.c.compiler.option.preprocessor.def.symbols" valueType="definedSymbols">
 									<listOptionValue builtIn="false" value="__REDLIB__"/>
@@ -134,10 +134,10 @@
 								</option>
 								<option id="gnu.c.compiler.option.misc.other.1222444467" name="Other flags" superClass="gnu.c.compiler.option.misc.other" value="-c -fmessage-length=0 -fno-builtin -ffunction-sections -fdata-sections" valueType="string"/>
 								<option id="gnu.c.compiler.option.include.paths.2143003127" name="Include paths (-I)" superClass="gnu.c.compiler.option.include.paths" valueType="includePath">
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/src}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/bsp/lpc11uxx/CMSISv2p00_LPC11Uxx/inc}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/bsp}&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/tinyusb}&quot;"/>
-									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}}&quot;"/>
 								</option>
 								<option id="gnu.c.compiler.option.include.files.1663093508" name="Include files (-include)" superClass="gnu.c.compiler.option.include.files"/>
 								<option id="com.crt.advproject.c.misc.dialect.378026709" name="C Dialect" superClass="com.crt.advproject.c.misc.dialect" value="com.crt.advproject.misc.dialect.gnu99" valueType="enumerated"/>
@@ -146,7 +146,7 @@
 								<inputType id="com.crt.advproject.compiler.input.1660235734" superClass="com.crt.advproject.compiler.input"/>
 							</tool>
 							<tool command="arm-none-eabi-gcc" commandLinePattern="${COMMAND} ${FLAGS} ${OUTPUT_FLAG}${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}" errorParsers="org.eclipse.cdt.core.GASErrorParser" id="com.crt.advproject.gas.exe.debug.1919954827" name="MCU Assembler" superClass="com.crt.advproject.gas.exe.debug">
-								<option id="com.crt.advproject.gas.arch.62277376" name="Architecture" superClass="com.crt.advproject.gas.arch" value="com.crt.advproject.gas.target.cm3" valueType="enumerated"/>
+								<option id="com.crt.advproject.gas.arch.62277376" name="Architecture" superClass="com.crt.advproject.gas.arch" value="com.crt.advproject.gas.target.cm0" valueType="enumerated"/>
 								<option id="com.crt.advproject.gas.thumb.567012827" name="Thumb mode" superClass="com.crt.advproject.gas.thumb" value="true" valueType="boolean"/>
 								<option id="gnu.both.asm.option.flags.crt.1544048579" name="Assembler flags" superClass="gnu.both.asm.option.flags.crt" value="-c -x assembler-with-cpp -D__REDLIB__ -DDEBUG -D__CODE_RED" valueType="string"/>
 								<inputType id="com.crt.advproject.assembler.input.2112542401" name="Additional Assembly Source Files" superClass="com.crt.advproject.assembler.input"/>
@@ -154,7 +154,7 @@
 							</tool>
 							<tool id="com.crt.advproject.link.cpp.exe.debug.438186138" name="MCU C++ Linker" superClass="com.crt.advproject.link.cpp.exe.debug"/>
 							<tool command="arm-none-eabi-gcc" commandLinePattern="${COMMAND} ${FLAGS} ${OUTPUT_FLAG}${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}" errorParsers="org.eclipse.cdt.core.GLDErrorParser" id="com.crt.advproject.link.exe.debug.332994381" name="MCU Linker" superClass="com.crt.advproject.link.exe.debug">
-								<option id="com.crt.advproject.link.arch.5439507" name="Architecture" superClass="com.crt.advproject.link.arch" value="com.crt.advproject.link.target.cm3" valueType="enumerated"/>
+								<option id="com.crt.advproject.link.arch.5439507" name="Architecture" superClass="com.crt.advproject.link.arch" value="com.crt.advproject.link.target.cm0" valueType="enumerated"/>
 								<option id="com.crt.advproject.link.thumb.1052282054" name="Thumb mode" superClass="com.crt.advproject.link.thumb" value="true" valueType="boolean"/>
 								<option id="com.crt.advproject.link.script.1723865493" name="Linker script" superClass="com.crt.advproject.link.script" value="&quot;device_os_none_Board_rf1ghznode.ld&quot;" valueType="string"/>
 								<option id="com.crt.advproject.link.manage.314167409" name="Manage linker script" superClass="com.crt.advproject.link.manage" value="true" valueType="boolean"/>
diff --git a/demos/device/device_os_none/device_os_none.uvopt b/demos/device/device_os_none/device_os_none.uvopt
new file mode 100644
index 000000000..52374ca8e
--- /dev/null
+++ b/demos/device/device_os_none/device_os_none.uvopt
@@ -0,0 +1,1805 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<ProjectOpt xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="project_opt.xsd">
+
+  <SchemaVersion>1.0</SchemaVersion>
+
+  <Header>### uVision Project, (C) Keil Software</Header>
+
+  <Extensions>
+    <cExt>*.c</cExt>
+    <aExt>*.s*; *.src; *.a*</aExt>
+    <oExt>*.obj</oExt>
+    <lExt>*.lib</lExt>
+    <tExt>*.txt; *.h; *.inc</tExt>
+    <pExt>*.plm</pExt>
+    <CppX>*.cpp</CppX>
+  </Extensions>
+
+  <DaveTm>
+    <dwLowDateTime>0</dwLowDateTime>
+    <dwHighDateTime>0</dwHighDateTime>
+  </DaveTm>
+
+  <Target>
+    <TargetName>Board EA4357</TargetName>
+    <ToolsetNumber>0x4</ToolsetNumber>
+    <ToolsetName>ARM-ADS</ToolsetName>
+    <TargetOption>
+      <CLKADS>12000000</CLKADS>
+      <OPTTT>
+        <gFlags>1</gFlags>
+        <BeepAtEnd>1</BeepAtEnd>
+        <RunSim>1</RunSim>
+        <RunTarget>0</RunTarget>
+      </OPTTT>
+      <OPTHX>
+        <HexSelection>1</HexSelection>
+        <FlashByte>65535</FlashByte>
+        <HexRangeLowAddress>0</HexRangeLowAddress>
+        <HexRangeHighAddress>0</HexRangeHighAddress>
+        <HexOffset>0</HexOffset>
+      </OPTHX>
+      <OPTLEX>
+        <PageWidth>79</PageWidth>
+        <PageLength>66</PageLength>
+        <TabStop>8</TabStop>
+        <ListingPath>.\UV4Build\</ListingPath>
+      </OPTLEX>
+      <ListingPage>
+        <CreateCListing>1</CreateCListing>
+        <CreateAListing>1</CreateAListing>
+        <CreateLListing>1</CreateLListing>
+        <CreateIListing>0</CreateIListing>
+        <AsmCond>1</AsmCond>
+        <AsmSymb>1</AsmSymb>
+        <AsmXref>0</AsmXref>
+        <CCond>1</CCond>
+        <CCode>0</CCode>
+        <CListInc>0</CListInc>
+        <CSymb>0</CSymb>
+        <LinkerCodeListing>0</LinkerCodeListing>
+      </ListingPage>
+      <OPTXL>
+        <LMap>1</LMap>
+        <LComments>1</LComments>
+        <LGenerateSymbols>1</LGenerateSymbols>
+        <LLibSym>1</LLibSym>
+        <LLines>1</LLines>
+        <LLocSym>1</LLocSym>
+        <LPubSym>1</LPubSym>
+        <LXref>0</LXref>
+        <LExpSel>0</LExpSel>
+      </OPTXL>
+      <OPTFL>
+        <tvExp>1</tvExp>
+        <tvExpOptDlg>0</tvExpOptDlg>
+        <IsCurrentTarget>0</IsCurrentTarget>
+      </OPTFL>
+      <CpuCode>8</CpuCode>
+      <DllOpt>
+        <SimDllName>SARMCM3.DLL</SimDllName>
+        <SimDllArguments>-MPU</SimDllArguments>
+        <SimDlgDllName>DCM.DLL</SimDlgDllName>
+        <SimDlgDllArguments>-pCM4</SimDlgDllArguments>
+        <TargetDllName>SARMCM3.DLL</TargetDllName>
+        <TargetDllArguments>-MPU</TargetDllArguments>
+        <TargetDlgDllName>TCM.DLL</TargetDlgDllName>
+        <TargetDlgDllArguments>-pCM4</TargetDlgDllArguments>
+      </DllOpt>
+      <DebugOpt>
+        <uSim>0</uSim>
+        <uTrg>1</uTrg>
+        <sLdApp>1</sLdApp>
+        <sGomain>1</sGomain>
+        <sRbreak>1</sRbreak>
+        <sRwatch>1</sRwatch>
+        <sRmem>1</sRmem>
+        <sRfunc>1</sRfunc>
+        <sRbox>1</sRbox>
+        <tLdApp>1</tLdApp>
+        <tGomain>0</tGomain>
+        <tRbreak>1</tRbreak>
+        <tRwatch>1</tRwatch>
+        <tRmem>1</tRmem>
+        <tRfunc>0</tRfunc>
+        <tRbox>1</tRbox>
+        <tRtrace>1</tRtrace>
+        <sRunDeb>0</sRunDeb>
+        <sLrtime>0</sLrtime>
+        <nTsel>7</nTsel>
+        <sDll></sDll>
+        <sDllPa></sDllPa>
+        <sDlgDll></sDlgDll>
+        <sDlgPa></sDlgPa>
+        <sIfile></sIfile>
+        <tDll></tDll>
+        <tDllPa></tDllPa>
+        <tDlgDll></tDlgDll>
+        <tDlgPa></tDlgPa>
+        <tIfile></tIfile>
+        <pMon>Segger\JL2CM3.dll</pMon>
+      </DebugOpt>
+      <Breakpoint/>
+      <DebugFlag>
+        <trace>0</trace>
+        <periodic>0</periodic>
+        <aLwin>0</aLwin>
+        <aCover>0</aCover>
+        <aSer1>0</aSer1>
+        <aSer2>0</aSer2>
+        <aPa>0</aPa>
+        <viewmode>0</viewmode>
+        <vrSel>0</vrSel>
+        <aSym>0</aSym>
+        <aTbox>0</aTbox>
+        <AscS1>0</AscS1>
+        <AscS2>0</AscS2>
+        <AscS3>0</AscS3>
+        <aSer3>0</aSer3>
+        <eProf>0</eProf>
+        <aLa>0</aLa>
+        <aPa1>0</aPa1>
+        <AscS4>0</AscS4>
+        <aSer4>0</aSer4>
+        <StkLoc>0</StkLoc>
+        <TrcWin>0</TrcWin>
+        <newCpu>0</newCpu>
+        <uProt>0</uProt>
+      </DebugFlag>
+      <Tracepoint>
+        <THDelay>0</THDelay>
+      </Tracepoint>
+      <LintExecutable></LintExecutable>
+      <LintConfigFile></LintConfigFile>
+    </TargetOption>
+  </Target>
+
+  <Target>
+    <TargetName>Board LPC4357USB</TargetName>
+    <ToolsetNumber>0x4</ToolsetNumber>
+    <ToolsetName>ARM-ADS</ToolsetName>
+    <TargetOption>
+      <CLKADS>12000000</CLKADS>
+      <OPTTT>
+        <gFlags>1</gFlags>
+        <BeepAtEnd>1</BeepAtEnd>
+        <RunSim>1</RunSim>
+        <RunTarget>0</RunTarget>
+      </OPTTT>
+      <OPTHX>
+        <HexSelection>1</HexSelection>
+        <FlashByte>65535</FlashByte>
+        <HexRangeLowAddress>0</HexRangeLowAddress>
+        <HexRangeHighAddress>0</HexRangeHighAddress>
+        <HexOffset>0</HexOffset>
+      </OPTHX>
+      <OPTLEX>
+        <PageWidth>79</PageWidth>
+        <PageLength>66</PageLength>
+        <TabStop>8</TabStop>
+        <ListingPath>.\UV4Build\</ListingPath>
+      </OPTLEX>
+      <ListingPage>
+        <CreateCListing>1</CreateCListing>
+        <CreateAListing>1</CreateAListing>
+        <CreateLListing>1</CreateLListing>
+        <CreateIListing>0</CreateIListing>
+        <AsmCond>1</AsmCond>
+        <AsmSymb>1</AsmSymb>
+        <AsmXref>0</AsmXref>
+        <CCond>1</CCond>
+        <CCode>0</CCode>
+        <CListInc>0</CListInc>
+        <CSymb>0</CSymb>
+        <LinkerCodeListing>0</LinkerCodeListing>
+      </ListingPage>
+      <OPTXL>
+        <LMap>1</LMap>
+        <LComments>1</LComments>
+        <LGenerateSymbols>1</LGenerateSymbols>
+        <LLibSym>1</LLibSym>
+        <LLines>1</LLines>
+        <LLocSym>1</LLocSym>
+        <LPubSym>1</LPubSym>
+        <LXref>0</LXref>
+        <LExpSel>0</LExpSel>
+      </OPTXL>
+      <OPTFL>
+        <tvExp>1</tvExp>
+        <tvExpOptDlg>0</tvExpOptDlg>
+        <IsCurrentTarget>0</IsCurrentTarget>
+      </OPTFL>
+      <CpuCode>8</CpuCode>
+      <DllOpt>
+        <SimDllName>SARMCM3.DLL</SimDllName>
+        <SimDllArguments>-MPU</SimDllArguments>
+        <SimDlgDllName>DCM.DLL</SimDlgDllName>
+        <SimDlgDllArguments>-pCM4</SimDlgDllArguments>
+        <TargetDllName>SARMCM3.DLL</TargetDllName>
+        <TargetDllArguments>-MPU</TargetDllArguments>
+        <TargetDlgDllName>TCM.DLL</TargetDlgDllName>
+        <TargetDlgDllArguments>-pCM4</TargetDlgDllArguments>
+      </DllOpt>
+      <DebugOpt>
+        <uSim>0</uSim>
+        <uTrg>1</uTrg>
+        <sLdApp>1</sLdApp>
+        <sGomain>1</sGomain>
+        <sRbreak>1</sRbreak>
+        <sRwatch>1</sRwatch>
+        <sRmem>1</sRmem>
+        <sRfunc>1</sRfunc>
+        <sRbox>1</sRbox>
+        <tLdApp>1</tLdApp>
+        <tGomain>0</tGomain>
+        <tRbreak>1</tRbreak>
+        <tRwatch>1</tRwatch>
+        <tRmem>1</tRmem>
+        <tRfunc>0</tRfunc>
+        <tRbox>1</tRbox>
+        <tRtrace>1</tRtrace>
+        <sRunDeb>0</sRunDeb>
+        <sLrtime>0</sLrtime>
+        <nTsel>7</nTsel>
+        <sDll></sDll>
+        <sDllPa></sDllPa>
+        <sDlgDll></sDlgDll>
+        <sDlgPa></sDlgPa>
+        <sIfile></sIfile>
+        <tDll></tDll>
+        <tDllPa></tDllPa>
+        <tDlgDll></tDlgDll>
+        <tDlgPa></tDlgPa>
+        <tIfile></tIfile>
+        <pMon>Segger\JL2CM3.dll</pMon>
+      </DebugOpt>
+      <Breakpoint/>
+      <DebugFlag>
+        <trace>0</trace>
+        <periodic>0</periodic>
+        <aLwin>0</aLwin>
+        <aCover>0</aCover>
+        <aSer1>0</aSer1>
+        <aSer2>0</aSer2>
+        <aPa>0</aPa>
+        <viewmode>0</viewmode>
+        <vrSel>0</vrSel>
+        <aSym>0</aSym>
+        <aTbox>0</aTbox>
+        <AscS1>0</AscS1>
+        <AscS2>0</AscS2>
+        <AscS3>0</AscS3>
+        <aSer3>0</aSer3>
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diff --git a/demos/device/src/keyboardd_app.c b/demos/device/src/keyboardd_app.c
index b072d7e12..9c00972a4 100644
--- a/demos/device/src/keyboardd_app.c
+++ b/demos/device/src/keyboardd_app.c
@@ -127,29 +127,28 @@ OSAL_TASK_FUNCTION( keyboardd_app_task ) (void* p_task_para)
 {
   OSAL_TASK_LOOP_BEGIN
 
-  if (tusbd_is_configured(0) && (keyboardd_report_count++ < 5) )
+  osal_task_delay(100);
+
+  if ( tusbd_is_configured(0) )
   {
-    if (!tusbd_hid_keyboard_is_busy(0))
+    static uint32_t button_mask = 0;
+
+    uint32_t new_button_mask = board_buttons();
+
+    //------------- Key pressed -------------//
+    if ( (button_mask != new_button_mask) && !tusbd_hid_keyboard_is_busy(0) )
     {
-      //------------- Key pressed -------------//
-      keyboard_report.keycode[0] = 0x04;
+      button_mask = new_button_mask;
+
+      for (uint8_t i=0; i<6; i++)
+      { // demo support up to 6 buttons, button0 = 'a', button1 = 'b', etc ...
+        keyboard_report.keycode[i] =  BIT_TEST_(button_mask, i) ? (0x04+i) : 0;
+      }
+
       tusbd_hid_keyboard_send(0, &keyboard_report );
-
-      while( tusbd_hid_keyboard_is_busy(0) )
-      { // delay for transfer complete
-        osal_task_delay(10);
-      }
-
-      //------------- Key released -------------//
-      if (!tusbd_hid_keyboard_is_busy(0))
-      {
-        keyboard_report.keycode[0] = 0x00;
-        tusbd_hid_keyboard_send(0, &keyboard_report );
-      }
     }
   }
 
-  osal_task_delay(1000);
 
   OSAL_TASK_LOOP_END
 }
diff --git a/demos/device/src/tusb_config.h b/demos/device/src/tusb_config.h
index 41aaf468a..bfc225351 100644
--- a/demos/device/src/tusb_config.h
+++ b/demos/device/src/tusb_config.h
@@ -82,11 +82,11 @@
 #define TUSB_CFG_DEVICE_FULLSPEED               1 // TODO refractor, remove
 
 //------------- CLASS -------------//
-#define TUSB_CFG_DEVICE_HID_KEYBOARD            0
+#define TUSB_CFG_DEVICE_HID_KEYBOARD            1
 #define TUSB_CFG_DEVICE_HID_MOUSE               0
 #define TUSB_CFG_DEVICE_HID_GENERIC             0
 #define TUSB_CFG_DEVICE_MSC                     0
-#define TUSB_CFG_DEVICE_CDC                     1
+#define TUSB_CFG_DEVICE_CDC                     0
 
 //--------------------------------------------------------------------+
 // COMMON CONFIGURATION
@@ -99,12 +99,10 @@
 #define TUSB_CFG_OS_TICKS_PER_SECOND  1000
 
 #ifdef __CODE_RED // compiled with lpcxpresso
-  #if (TUSB_CFG_MCU == MCU_LPC11UXX) || (TUSB_CFG_MCU == MCU_LPC13UXX)
+  #if (TUSB_CFG_MCU == MCU_LPC11UXX) || (TUSB_CFG_MCU == MCU_LPC13UXX) || (TUSB_CFG_MCU == MCU_LPC175X_6X)
     #define TUSB_RAM_SECTION  ".data.$RAM2"
   #elif  (TUSB_CFG_MCU == MCU_LPC43XX)
     #define TUSB_RAM_SECTION  ".data.$RAM3"
-  #elif (TUSB_CFG_MCU == MCU_LPC175X_6X)
-    #define TUSB_RAM_SECTION  ".data.$RAM2"
   #else
     #error Please define USB RAM section
   #endif