xmc4500 ported, cdc msc example run fine

hw/bsp/xmc4000/family.c

@@ -30,6 +30,15 @@
 #include "bsp/board.h"
 #include "board.h"
 
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USB0_0_IRQHandler(void)
+{
+  tud_int_handler(0);
+}
+
 void board_init(void)
 {
   board_clock_init();
@@ -58,6 +67,10 @@ void board_init(void)
   // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
   NVIC_SetPriority(USB0_0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
 #endif
+
+  // USB Power Enable
+  XMC_SCU_RESET_DeassertPeripheralReset(XMC_SCU_PERIPHERAL_RESET_USB0);
+  XMC_SCU_POWER_EnableUsb();
 }
 
 //--------------------------------------------------------------------+

hw/bsp/xmc4000/family.mk

@@ -18,6 +18,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 #CFLAGS += -Wno-error=shadow -Wno-error=cast-align
 
+SKIP_NANOLIB = 1
+
 SRC_C += \
 	src/portable/synopsys/dwc2/dcd_dwc2.c \
 	$(MCU_DIR)/Newlib/syscalls.c \
@@ -25,6 +27,7 @@ SRC_C += \
 	$(MCU_DIR)/XMCLib/src/xmc4_gpio.c \
 	$(MCU_DIR)/XMCLib/src/xmc4_scu.c
 
+
 SRC_S += $(MCU_DIR)/CMSIS/Infineon/COMPONENT_$(MCU_VARIANT)/Source/TOOLCHAIN_GCC_ARM/startup_$(MCU_VARIANT).S
 
 INC += \