added mbed lpc1768 board

hw/bsp/mbed1768/board.mk

@@ -0,0 +1,44 @@
+CFLAGS += \
+  -mthumb \
+  -mabi=aapcs \
+  -mcpu=cortex-m3 \
+  -nostdlib \
+  -DCORE_M3 \
+  -D__USE_LPCOPEN \
+  -DCFG_TUSB_MCU=OPT_MCU_LPC175X_6X \
+  -DRTC_EV_SUPPORT=0
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/mbed1768/lpc1768.ld
+
+MCU_DIR = hw/mcu/nxp/lpc_driver/lpc175x_6x
+
+# TODO remove later
+SRC_C += src/portable/$(VENDOR)/$(CHIP_FAMILY)/hal_$(CHIP_FAMILY).c
+
+SRC_C += \
+	$(MCU_DIR)/cr_startup_lpc175x_6x.c \
+	$(MCU_DIR)/lpc_chip_175x_6x/src/chip_17xx_40xx.c \
+	$(MCU_DIR)/lpc_chip_175x_6x/src/clock_17xx_40xx.c \
+	$(MCU_DIR)/lpc_chip_175x_6x/src/gpio_17xx_40xx.c \
+	$(MCU_DIR)/lpc_chip_175x_6x/src/iocon_17xx_40xx.c \
+	$(MCU_DIR)/lpc_chip_175x_6x/src/sysctl_17xx_40xx.c \
+	$(MCU_DIR)/lpc_chip_175x_6x/src/sysinit_17xx_40xx.c \
+	$(MCU_DIR)/lpc_chip_175x_6x/src/uart_17xx_40xx.c
+
+INC += \
+	$(TOP)/$(MCU_DIR)/lpc_chip_175x_6x/inc
+
+# For TinyUSB port source
+VENDOR = nxp
+CHIP_FAMILY = lpc17_40
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM3
+
+# For flash-jlink target
+JLINK_DEVICE = LPC1768
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink