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micropython/ports/samd/Makefile
robert-hh c07b178dbd samd: Add support for VfsRom filesystem for SAMD21 and SAMD51. 
The flash driver is update to support the new `mp_vfs_rom_ioctl()`
function, and the buffer protocol is added to `samd_flash_type` (it is
needed for VfsRom on devices without external flash).

For SAMD21, only boards with external SPI flash have VfsRom enabled, due
to size constraints.  For such boards, the VfsRom filesystem has a size of
12k and is placed at the upper end of the flash.  The `onewire`, `ds18x20`
and `dht` drivers have been removed from frozen bytecode as they can be
placed into the VfsRom files when needed.

For SAMD51, the VfsRom filesystem has a default size of 64k for SAMD51x19
and 256K for SAMD51x20.  It is placed at the upper end of the flash.
For boards with external SPI flash, the code size is reduced from 496K to
432K.  If that is not sufficient for some boards or configurations, it can
be changed for each board or board variant.

Tested with ADAFRUIT_ITSYBITSY_M0_EXPRESS, ADAFRUIT_ITSYBITSY_M4_EXPRESS,
SPARKFUN_SAMD51_THING_PLUS, SEEED_XIAO_SAMD21, SAMD_GENERIC_D51X19, and
SAMD_GENERIC_D51X20.

Signed-off-by: Damien George <damien@micropython.org>
Signed-off-by: robert-hh <robert@hammelrath.com>
2026-01-02 15:23:49 +11:00

219 lines
6.6 KiB
Makefile
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# 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 $(BOARD_DIR:/=))
else
# If not given on the command line, then default to ADAFRUIT_ITSYBITSY_M4_EXPRESS.
BOARD ?= ADAFRUIT_ITSYBITSY_M4_EXPRESS
BOARD_DIR ?= boards/$(BOARD)
endif
ifeq ($(wildcard $(BOARD_DIR)/.),)
$(error Invalid BOARD specified: $(BOARD_DIR))
endif
ifneq ($(BOARD_VARIANT),)
ifeq ($(wildcard $(BOARD_DIR)/mpconfigvariant_$(BOARD_VARIANT).mk),)
$(error Invalid BOARD_VARIANT specified: $(BOARD_VARIANT))
endif
endif
# If the build directory is not given, make it reflect the board name (and
# optionally the board variant).
ifneq ($(BOARD_VARIANT),)
BUILD ?= build-$(BOARD)-$(BOARD_VARIANT)
else
BUILD ?= build-$(BOARD)
endif
CROSS_COMPILE ?= arm-none-eabi-
UF2CONV ?= $(TOP)/tools/uf2conv.py
MCU_SERIES_LOWER = $(shell echo $(MCU_SERIES) | tr '[:upper:]' '[:lower:]')
include ../../py/mkenv.mk
# Include board specific .mk file, and optional board variant .mk file.
include $(BOARD_DIR)/mpconfigboard.mk
ifeq ($(BOARD_VARIANT),)
-include $(BOARD_DIR)/mpconfigvariant.mk
else
include $(BOARD_DIR)/mpconfigvariant_$(BOARD_VARIANT).mk
endif
include mcu/$(MCU_SERIES_LOWER)/mpconfigmcu.mk
# Qstr definitions (must come before including py.mk)
QSTR_DEFS = qstrdefsport.h
QSTR_GLOBAL_DEPENDENCIES = $(BOARD_DIR)/mpconfigboard.h mcu/$(MCU_SERIES_LOWER)/mpconfigmcu.h
FROZEN_MANIFEST ?= boards/manifest.py
# Include py core make definitions
include $(TOP)/py/py.mk
include $(TOP)/extmod/extmod.mk
GIT_SUBMODULES += lib/asf4 lib/tinyusb
INC += -I.
INC += -I$(TOP)
INC += -I$(BUILD)
INC += -I$(BOARD_DIR)
INC += -Imcu/$(MCU_SERIES_LOWER)
INC += -I$(TOP)/lib/cmsis/inc
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hal/include
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hal/utils/include
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/config
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hri
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hpl/core
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hpl/gclk
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hpl/pm
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hpl/port
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hpl/rtc
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/hpl/tc
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/include
INC += -I$(TOP)/lib/asf4/$(MCU_SERIES_LOWER)/include/pio
INC += -I$(TOP)/lib/tinyusb/src
INC += -I$(TOP)/shared/tinyusb/
MAKE_PINS = boards/make-pins.py
BOARD_PINS = $(BOARD_DIR)/pins.csv
PREFIX_FILE = boards/pins_prefix.c
AF_FILE = mcu/$(MCU_SERIES_LOWER)/pin-af-table.csv
GEN_PINS_SRC = $(BUILD)/pins_$(BOARD).c
GEN_PINS_HDR = $(HEADER_BUILD)/pins.h
CFLAGS += $(INC) -Wall -Werror -std=c99 -nostdlib -mthumb $(CFLAGS_MCU) -fsingle-precision-constant -Wdouble-promotion
CFLAGS += -DMCU_$(MCU_SERIES) -D__$(CMSIS_MCU)__
CFLAGS += $(CFLAGS_EXTRA)
# Strip the letter 'K' from MICROPY_HW_CODESIZE for use by C code.
CFLAGS += -DMICROPY_HW_CODESIZE=$(strip $(subst K,' ', $(MICROPY_HW_CODESIZE)))
LDFLAGS += -nostdlib $(addprefix -T,$(LD_FILES)) -Map=$@.map --cref
LDFLAGS += --defsym=_codesize=$(MICROPY_HW_CODESIZE) --defsym=_micropy_hw_romfs_part0_size=$(MICROPY_HW_ROMFS_BYTES)
LIBS += $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
# Tune for Debugging or Optimization
CFLAGS += -g # always include debug info in the ELF
ifeq ($(DEBUG),1)
CFLAGS += -O0
else
CFLAGS += -Os -DNDEBUG
LDFLAGS += --gc-sections --print-memory-usage
CFLAGS += -fdata-sections -ffunction-sections
endif
# Disable VFSROM support if the size was set to 0
ifeq ($(MICROPY_HW_ROMFS_BYTES),0)
CFLAGS += -DMICROPY_VFS_ROM=0
endif
# Flags for optional C++ source code
CXXFLAGS += $(filter-out -std=c99,$(CFLAGS))
# TODO make this common -- shouldn't be using these "private" vars from py.mk
ifneq ($(SRC_CXX)$(SRC_USERMOD_CXX)$(SRC_USERMOD_LIB_CXX),)
LIBSTDCPP_FILE_NAME = "$(shell $(CXX) $(CXXFLAGS) -print-file-name=libstdc++.a)"
LDFLAGS += -L"$(shell dirname $(LIBSTDCPP_FILE_NAME))"
endif
MPY_CROSS_FLAGS += -march=$(MPY_CROSS_MCU_ARCH)
SRC_C += \
mcu/$(MCU_SERIES_LOWER)/clock_config.c \
help.c \
machine_bitstream.c \
machine_dac.c \
machine_i2c.c \
machine_pin.c \
machine_rtc.c \
machine_spi.c \
main.c \
modsamd.c \
mphalport.c \
pendsv.c \
pin_af.c \
samd_flash.c \
samd_isr.c \
samd_qspiflash.c \
samd_soc.c \
samd_spiflash.c \
usbd.c \
SHARED_SRC_C += \
drivers/dht/dht.c \
shared/runtime/mpirq.c \
shared/libc/printf.c \
shared/libc/string0.c \
shared/readline/readline.c \
shared/runtime/gchelper_native.c \
shared/runtime/interrupt_char.c \
shared/runtime/pyexec.c \
shared/runtime/softtimer.c \
shared/runtime/stdout_helpers.c \
shared/runtime/sys_stdio_mphal.c \
shared/timeutils/timeutils.c \
shared/tinyusb/mp_usbd.c \
shared/tinyusb/mp_usbd_cdc.c \
shared/tinyusb/mp_usbd_descriptor.c \
shared/tinyusb/mp_usbd_runtime.c \
ASF4_SRC_C += $(addprefix lib/asf4/$(MCU_SERIES_LOWER)/,\
hal/src/hal_atomic.c \
hal/src/hal_flash.c \
hpl/nvmctrl/hpl_nvmctrl.c \
)
LIBM_SRC_C += $(SRC_LIB_LIBM_C)
LIBM_SRC_C += $(SRC_LIB_LIBM_SQRT_SW_C)
TINYUSB_SRC_C += $(addprefix lib/tinyusb/src/,\
class/cdc/cdc_device.c \
common/tusb_fifo.c \
device/usbd.c \
device/usbd_control.c \
portable/microchip/samd/dcd_samd.c \
tusb.c \
)
DRIVERS_SRC_C += \
drivers/bus/softspi.c \
# List of sources for qstr extraction
SRC_QSTR += $(SRC_C) $(SHARED_SRC_C) $(SRC_CXX) $(GEN_PINS_SRC)
OBJ += $(PY_O)
OBJ += $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(SRC_CXX:.cpp=.o))
OBJ += $(addprefix $(BUILD)/, $(SRC_S:.s=.o))
OBJ += $(addprefix $(BUILD)/, $(SHARED_SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(ASF4_SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(LIBM_SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(DRIVERS_SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(TINYUSB_SRC_C:.c=.o))
OBJ += $(GEN_PINS_SRC:.c=.o)
all: $(BUILD)/firmware.uf2
$(BUILD)/firmware.elf: $(OBJ)
$(ECHO) "LINK $@"
$(Q)$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
$(BUILD)/firmware.bin: $(BUILD)/firmware.elf
$(Q)$(OBJCOPY) -O binary -j .isr_vector -j .text -j .data $^ $(BUILD)/firmware.bin
$(BUILD)/firmware.uf2: $(BUILD)/firmware.bin
$(Q)$(PYTHON) $(UF2CONV) $(UF2CONV_FLAGS) -b $(TEXT0) -c -o $@ $<
# pin_af.c: $(BUILD)/$(GEN_PIN_AF) | $(HEADER_BUILD)
# Use a pattern rule here so that make will only call make-pins.py once to make
# both pins_$(BOARD).c and pins.h
$(BUILD)/%_$(BOARD).c $(HEADER_BUILD)/%.h: $(BOARD_DIR)/%.csv $(MAKE_PINS) $(AF_FILE) $(PREFIX_FILE) | $(HEADER_BUILD)
$(ECHO) "GEN $@"
$(Q)$(PYTHON) $(MAKE_PINS) --board-csv $(BOARD_PINS) --af-csv $(AF_FILE) --prefix $(PREFIX_FILE) \
--output-source $(GEN_PINS_SRC) --output-header $(GEN_PINS_HDR) \
--mcu $(MCU_SERIES)
include $(TOP)/py/mkrules.mk
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