initial commit

third_party/tinyusb/hw/bsp/lpc55/boards/lpcxpresso55s28/board.mk

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+MCU_VARIANT = LPC55S28
+MCU_CORE = LPC55S28
+MCU_DRIVER_VARIANT = LPC55S69
+
+# device fullspeed, host highspeed
+RHPORT_DEVICE ?= 0
+RHPORT_HOST ?= 1
+
+CFLAGS += -DCPU_LPC55S28JBD100
+
+SRC_C += \
+	$(TOP)/$(BOARD_PATH)/board/clock_config.c \
+	$(TOP)/$(BOARD_PATH)/board/pin_mux.c \
+	$(TOP)/$(BOARD_PATH)/board/peripherals.c
+
+INC += $(TOP)/$(BOARD_PATH)/board
+
+JLINK_DEVICE = LPC55S28
+PYOCD_TARGET = LPC55S28
+
+# flash using pyocd
+flash: flash-pyocd