diff --git a/bsp/xplorer4330/Libraries/Device/NXP/LPC43xx/Source/Templates/GCC/cr_startup_lpc43xx_m0sub.c b/bsp/xplorer4330/Libraries/Device/NXP/LPC43xx/Source/Templates/GCC/cr_startup_lpc43xx_m0sub.c
index 5f6233ad0ec06b11413011902b27ad7af5fd0d87..33668ef37d7235ecd51649013ea934751f69f00b 100644
--- a/bsp/xplorer4330/Libraries/Device/NXP/LPC43xx/Source/Templates/GCC/cr_startup_lpc43xx_m0sub.c
+++ b/bsp/xplorer4330/Libraries/Device/NXP/LPC43xx/Source/Templates/GCC/cr_startup_lpc43xx_m0sub.c
@@ -73,7 +73,8 @@ WEAK void SysTick_Handler(void);
 WEAK void IntDefaultHandler(void);
 #else
 WEAK void M0S_NMI_Handler(void);
-WEAK void M0S_HardFault_Handler (void);
+WEAK void M0S_HardFault_Handler(void);
+WEAK void M0S_DebugMon_Handler(void);
 WEAK void M0S_SVC_Handler(void);
 WEAK void M0S_PendSV_Handler(void);
 WEAK void M0S_SysTick_Handler(void);
diff --git a/bsp/xplorer4330/Libraries/Device/SConscript b/bsp/xplorer4330/Libraries/Device/SConscript
index d0aac1b07063bfd41a3652f53ccc2d072410fe9e..a6ea5ee936d115205994369bdc18c35110c0deb9 100644
--- a/bsp/xplorer4330/Libraries/Device/SConscript
+++ b/bsp/xplorer4330/Libraries/Device/SConscript
@@ -13,14 +13,14 @@ CPPDEFINES = [rtconfig.USE_CORE + ' USE_SPIFI']
 # add for startup script 
 if rtconfig.USE_CORE =='CORE_M4':
 	if rtconfig.CROSS_TOOL == 'gcc':
-		src += ['NXP/LPC43xx/Source/Templates/GCC/startup_LPC43xx.s']
+		src += ['NXP/LPC43xx/Source/Templates/GCC/cr_startup_lpc43xx.c']
 	elif rtconfig.CROSS_TOOL == 'keil':
 		src += ['NXP/LPC43xx/Source/Templates/ARM/startup_LPC43xx.s']
 	elif rtconfig.CROSS_TOOL == 'iar':
 		src += ['NXP/LPC43xx/Source/Templates/IAR/startup_LPC43xx.s']
 else:
 	if rtconfig.CROSS_TOOL == 'gcc':
-		src += ['NXP/LPC43xx/Source/Templates/GCC/startup_LPC43xx_M0.s']
+		src += ['NXP/LPC43xx/Source/Templates/GCC/cr_startup_lpc43xx_m0sub.c']
 	elif rtconfig.CROSS_TOOL == 'keil':
 		src += ['NXP/LPC43xx/Source/Templates/ARM/startup_LPC43xx_M0.s']
 	elif rtconfig.CROSS_TOOL == 'iar':
diff --git a/bsp/xplorer4330/libraries/SConscript b/bsp/xplorer4330/Libraries/SConscript
similarity index 100%
rename from bsp/xplorer4330/libraries/SConscript
rename to bsp/xplorer4330/Libraries/SConscript
diff --git a/bsp/xplorer4330/m4/SConscript b/bsp/xplorer4330/M4/SConscript
similarity index 100%
rename from bsp/xplorer4330/m4/SConscript
rename to bsp/xplorer4330/M4/SConscript
diff --git a/bsp/xplorer4330/m4/SConstruct b/bsp/xplorer4330/M4/SConstruct
similarity index 100%
rename from bsp/xplorer4330/m4/SConstruct
rename to bsp/xplorer4330/M4/SConstruct
diff --git a/bsp/xplorer4330/m4/project.uvopt b/bsp/xplorer4330/M4/project.uvopt
similarity index 100%
rename from bsp/xplorer4330/m4/project.uvopt
rename to bsp/xplorer4330/M4/project.uvopt
diff --git a/bsp/xplorer4330/m4/project.uvproj b/bsp/xplorer4330/M4/project.uvproj
similarity index 100%
rename from bsp/xplorer4330/m4/project.uvproj
rename to bsp/xplorer4330/M4/project.uvproj
diff --git a/bsp/xplorer4330/m4/rtconfig.h b/bsp/xplorer4330/M4/rtconfig.h
similarity index 100%
rename from bsp/xplorer4330/m4/rtconfig.h
rename to bsp/xplorer4330/M4/rtconfig.h
diff --git a/bsp/xplorer4330/m4/rtconfig.py b/bsp/xplorer4330/M4/rtconfig.py
similarity index 100%
rename from bsp/xplorer4330/m4/rtconfig.py
rename to bsp/xplorer4330/M4/rtconfig.py
diff --git a/bsp/xplorer4330/m4/template.uvproj b/bsp/xplorer4330/M4/template.uvproj
similarity index 100%
rename from bsp/xplorer4330/m4/template.uvproj
rename to bsp/xplorer4330/M4/template.uvproj