Initial project setup

managed_components/espressif__tinyusb/hw/bsp/nutiny_nuc121s/board.mk

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+CFLAGS += \
+  -flto \
+  -mthumb \
+  -mabi=aapcs-linux \
+  -mcpu=cortex-m0 \
+  -D__ARM_FEATURE_DSP=0 \
+  -DUSE_ASSERT=0 \
+  -DCFG_EXAMPLE_MSC_READONLY \
+  -DCFG_TUSB_MCU=OPT_MCU_NUC121
+
+# mcu driver cause following warnings
+CFLAGS += -Wno-error=redundant-decls
+
+LDFLAGS_GCC += -specs=nosys.specs -specs=nano.specs
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/$(BOARD)/nuc121_flash.ld
+
+SRC_C += \
+  src/portable/nuvoton/nuc121/dcd_nuc121.c \
+  hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/system_NUC121.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/clk.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/fmc.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/gpio.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/sys.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/timer.c \
+  hw/mcu/nuvoton/nuc121_125/StdDriver/src/uart.c
+
+SRC_S += \
+  hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Source/GCC/startup_NUC121.S
+
+INC += \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/Device/Nuvoton/NUC121/Include \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/StdDriver/inc \
+  $(TOP)/hw/mcu/nuvoton/nuc121_125/CMSIS/Include
+
+# For freeRTOS port source
+FREERTOS_PORTABLE_SRC = $(FREERTOS_PORTABLE_PATH)/ARM_CM0
+
+# For flash-jlink target
+JLINK_DEVICE = NUC121SC2AE
+
+# Flash using Nuvoton's openocd fork at https://github.com/OpenNuvoton/OpenOCD-Nuvoton
+# Please compile and install it from github source
+flash: $(BUILD)/$(PROJECT).elf
+	openocd -f interface/nulink.cfg -f target/numicroM0.cfg -c "program $< reset exit"