tinyUSB/hw/bsp/feather_m0_express/board.mk

CFLAGS += \
  -flto \
  -mthumb \
  -mabi=aapcs-linux \
  -mcpu=cortex-m0plus \
  -nostdlib -nostartfiles \
  -D__SAMD21G18A__ \
  -DCONF_DFLL_OVERWRITE_CALIBRATION=0 \
  -DCFG_TUSB_MCU=OPT_MCU_SAMD21

# All source paths should be relative to the top level.
LD_FILE = hw/bsp/$(BOARD)/samd21g18a_flash.ld

SRC_C += \
	hw/mcu/microchip/samd/asf4/samd21/gcc/gcc/startup_samd21.c \
	hw/mcu/microchip/samd/asf4/samd21/gcc/system_samd21.c \
	hw/mcu/microchip/samd/asf4/samd21/hpl/gclk/hpl_gclk.c \
	hw/mcu/microchip/samd/asf4/samd21/hpl/pm/hpl_pm.c \
	hw/mcu/microchip/samd/asf4/samd21/hpl/sysctrl/hpl_sysctrl.c \
	hw/mcu/microchip/samd/asf4/samd21/hal/src/hal_atomic.c

INC += \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/ \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/config \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/include \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/hal/include \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/hal/utils/include \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/hpl/pm/ \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/hpl/port \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/hri \
	$(TOP)/hw/mcu/microchip/samd/asf4/samd21/CMSIS/Include

# For TinyUSB port source 
VENDOR = microchip
CHIP_FAMILY = samd

# For freeRTOS port source
FREERTOS_PORT = ARM_CM0

# For flash-jlink target
JLINK_DEVICE = ATSAMD21G18

# flash using bossac at least version 1.8
# can be found in arduino15/packages/arduino/tools/bossac/
# Add it to your PATH or change BOSSAC variable to match your installation
BOSSAC = bossac

flash: $(BUILD)/$(BOARD)-firmware.bin
	@:$(call check_defined, SERIAL, example: SERIAL=/dev/ttyACM0)
	$(BOSSAC) --port=$(SERIAL) -U -i --offset=0x2000 -e -w $^ -R