# Makefile for micropython on Raspberry Pi RP2
#
# This is a simple wrapper around cmake

include ../../py/verbose.mk

# Select the board to build for:
ifdef BOARD_DIR
# Custom board path - remove trailing slash and get the final component of
# the path as the board name.
BOARD ?= $(notdir $(BOARD_DIR:/=))
else
# If not given on the command line, then default to RPI_PICO.
BOARD ?= RPI_PICO
BOARD_DIR ?= boards/$(BOARD)
endif

ifeq ($(wildcard $(BOARD_DIR)/.),)
ifeq ($(findstring boards/PICO,$(BOARD_DIR)),boards/PICO)
$(warning The PICO* boards have been renamed to RPI_PICO*)
endif
$(error Invalid BOARD specified: $(BOARD_DIR))
endif

# If the build directory is not given, make it reflect the board name (and
# optionally the board variant).
ifneq ($(BOARD_VARIANT),)
BUILD ?= build-$(BOARD)-$(BOARD_VARIANT)
else
BUILD ?= build-$(BOARD)
endif

ifeq ($(BUILD_VERBOSE),1)
MAKE_ARGS += VERBOSE=1  # Picked up in Makefile generated by CMake
endif

CMAKE_ARGS += -DMICROPY_BOARD=$(BOARD) -DMICROPY_BOARD_DIR="$(abspath $(BOARD_DIR))"

ifdef USER_C_MODULES
CMAKE_ARGS += -DUSER_C_MODULES=${USER_C_MODULES}
endif

ifneq ($(FROZEN_MANIFEST),)
CMAKE_ARGS += -DMICROPY_FROZEN_MANIFEST=${FROZEN_MANIFEST}
endif

ifeq ($(DEBUG),1)
CMAKE_ARGS += -DCMAKE_BUILD_TYPE=Debug
endif

ifdef BOARD_VARIANT
CMAKE_ARGS += -DMICROPY_BOARD_VARIANT=$(BOARD_VARIANT)
endif

ifdef MICROPY_PREVIEW_VERSION_2
CMAKE_ARGS += -DMICROPY_PREVIEW_VERSION_2=1
endif

ifdef MICROPY_C_HEAP_SIZE
CMAKE_ARGS += -DMICROPY_C_HEAP_SIZE=$(MICROPY_C_HEAP_SIZE)
endif

HELP_PICO_SDK_SUBMODULE ?= "\033[1;31mError: pico-sdk submodule is not initialized.\033[0m Run 'make submodules'"
HELP_BUILD_ERROR ?= "See \033[1;31mhttps://github.com/micropython/micropython/wiki/Build-Troubleshooting\033[0m"

all:
	$(Q)[ -f ../../lib/pico-sdk/README.md ] || (echo -e $(HELP_PICO_SDK_SUBMODULE); false)
	$(Q)[ -e $(BUILD)/Makefile ] || cmake -S . -B $(BUILD) -DPICO_BUILD_DOCS=0 ${CMAKE_ARGS}
	$(Q)$(MAKE) $(MAKE_ARGS) -C $(BUILD) || (echo -e $(HELP_BUILD_ERROR); false)

clean:
	$(RM) -rf $(BUILD)

deploy: all
	$(Q)picotool load -x $(BUILD)/firmware.elf

# First ensure that pico-sdk is initialised, then run CMake with the
# UPDATE_SUBMODULES flag to update necessary submodules for this board.
#
# This is done in a dedicated build directory as some CMake cache values are not
# set correctly if not all submodules are loaded yet.
submodules:
	$(Q)$(MAKE) -f ../../py/mkrules.mk GIT_SUBMODULES="lib/pico-sdk" submodules
	$(Q)cmake -S . -B $(BUILD)/submodules -DUPDATE_SUBMODULES=1 ${CMAKE_ARGS}
