add make.mk and rules.mk to help new makefile example

hw/bsp/pca10056/board.mk

@@ -1,11 +1,12 @@
 CFLAGS += \
-	-DCFG_TUSB_MCU=OPT_MCU_NRF5X \
-	-DNRF52840_XXAA \
 	-mthumb \
 	-mabi=aapcs \
 	-mcpu=cortex-m4 \
 	-mfloat-abi=hard \
-	-mfpu=fpv4-sp-d16
+	-mfpu=fpv4-sp-d16 \
+	-DCFG_TUSB_MCU=OPT_MCU_NRF5X \
+	-DNRF52840_XXAA \
+  -DCONFIG_GPIO_AS_PINRESET
 
 # nrfx issue undef _ARMCC_VERSION usage https://github.com/NordicSemiconductor/nrfx/issues/49
 CFLAGS += -Wno-error=undef 
@@ -23,27 +24,31 @@ SRC_C += \
 SRC_C += src/portable/$(VENDOR)/$(CHIP_FAMILY)/hal_$(CHIP_FAMILY).c
 
 INC += \
-	-I$(TOP)/hw/cmsis/Include \
-	-I$(TOP)/hw/mcu/nordic \
-	-I$(TOP)/hw/mcu/nordic/nrfx \
-	-I$(TOP)/hw/mcu/nordic/nrfx/mdk \
-	-I$(TOP)/hw/mcu/nordic/nrfx/hal \
-	-I$(TOP)/hw/mcu/nordic/nrfx/drivers/include \
-	-I$(TOP)/hw/mcu/nordic/nrfx/drivers/src \
+	$(TOP)/hw/cmsis/Include \
+	$(TOP)/hw/mcu/nordic \
+	$(TOP)/hw/mcu/nordic/nrfx \
+	$(TOP)/hw/mcu/nordic/nrfx/mdk \
+	$(TOP)/hw/mcu/nordic/nrfx/hal \
+	$(TOP)/hw/mcu/nordic/nrfx/drivers/include \
+	$(TOP)/hw/mcu/nordic/nrfx/drivers/src \
 
 SRC_S += hw/mcu/nordic/nrfx/mdk/gcc_startup_nrf52840.S
 
 ASFLAGS += -D__HEAP_SIZE=0
-ASFLAGS += -DCONFIG_GPIO_AS_PINRESET
-ASFLAGS += -DBLE_STACK_SUPPORT_REQD
 ASFLAGS += -DSWI_DISABLE0
 ASFLAGS += -DFLOAT_ABI_HARD
 ASFLAGS += -DNRF52840_XXAA
 
+# For TinyUSB port source
 VENDOR = nordic
 CHIP_FAMILY = nrf5x
 
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM4F
+
+# For flash-jlink target
 JLINK_DEVICE = nRF52840_xxAA
+JLINK_IF = swd
 
 # flash using jlink
 flash: flash-jlink