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circuitpython/ports/samd/Makefile
robert-hh d693758ab2 samd/machine_pwm: Add the machine.PWM class. 
Features are:
- 3 to 5 different frequency groups.
- Freq range of 1Hz - 24 MHz.
- Duty rate stays stable on freq change.

Keyword options to the PWM constructor:
- device=n Select a specific PWM device.  If no device is specified, a free
           device is chosen, if available at that pin.
- freq=nnnn
- duty_u16=nnnn
- duty_ns=nnnn
- invert=True/False Allowing two outputs on the same device/channel to have
                    complementary signals.

If both freq and duty are provided, PWM output will start immediately.

Pins at the same device have the same frequency.  If the PWM output number
exceeds the number of channels at the PWM device, the effctive channel_no
is output_no % channel_count.  So with a channel count of 4, output 7 is
assigned to channel 3.  Pins at a certain channel have the same frequency
and duty rate, but may be seperately inverted.
2022-10-06 22:42:55 +11:00

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Makefile
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BOARD ?= ADAFRUIT_ITSYBITSY_M4_EXPRESS
BOARD_DIR ?= boards/$(BOARD)
BUILD ?= build-$(BOARD)
CROSS_COMPILE ?= arm-none-eabi-
UF2CONV ?= $(TOP)/tools/uf2conv.py
ifeq ($(wildcard $(BOARD_DIR)/.),)
$(error Invalid BOARD specified: $(BOARD_DIR))
endif
include ../../py/mkenv.mk
include $(BOARD_DIR)/mpconfigboard.mk
# Qstr definitions (must come before including py.mk)
QSTR_DEFS = qstrdefsport.h
QSTR_GLOBAL_DEPENDENCIES = $(BOARD_DIR)/mpconfigboard.h
MCU_SERIES_LOWER = $(shell echo $(MCU_SERIES) | tr '[:upper:]' '[:lower:]')
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 += -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
MAKE_PIN_AF = boards/make-pin-af.py
PIN_AF_TABLE_CSV = boards/pin-af-table-$(MCU_SERIES).csv
GEN_PIN_AF = pin_af_table.c
MAKE_PINS = boards/make-pins.py
BOARD_PINS = $(BOARD_DIR)/pins.csv
GEN_PINS_SRC = $(BUILD)/pins.c
GEN_PINS_HDR = $(BUILD)/pins.h
CFLAGS_MCU_SAMD21 = -mtune=cortex-m0plus -mcpu=cortex-m0plus -msoft-float
CFLAGS_MCU_SAMD51 = -mtune=cortex-m4 -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard
CFLAGS = $(INC) -Wall -Werror -std=c99 -nostdlib -mthumb $(CFLAGS_MCU_$(MCU_SERIES)) -fsingle-precision-constant -Wdouble-promotion
CFLAGS += -DMCU_$(MCU_SERIES) -D__$(CMSIS_MCU)__
CFLAGS += $(CFLAGS_MOD) $(CFLAGS_EXTRA)
CFLAGS += -DMPCONFIG_MCU_H='<boards/mpconfig_$(MCU_SERIES_LOWER).h>'
CFLAGS += -DPIN_AF_TABLE_C='<$(BUILD)/$(GEN_PIN_AF)>'
QSTR_GLOBAL_DEPENDENCIES += boards/mpconfig_$(MCU_SERIES_LOWER).h
LDFLAGS = -nostdlib $(addprefix -T,$(LD_FILES)) -Map=$@.map --cref
LDFLAGS += $(LDFLAGS_MOD)
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
CFLAGS += -fdata-sections -ffunction-sections
endif
# Flags for optional C++ source code
CXXFLAGS += $(filter-out -std=c99,$(CFLAGS))
CXXFLAGS += $(CXXFLAGS_MOD)
ifneq ($(SRC_CXX)$(SRC_MOD_CXX),)
LIBSTDCPP_FILE_NAME = "$(shell $(CXX) $(CXXFLAGS) -print-file-name=libstdc++.a)"
LDFLAGS += -L"$(shell dirname $(LIBSTDCPP_FILE_NAME))"
endif
SRC_C = \
clock_config.c \
help.c \
machine_adc.c \
machine_led.c \
machine_pin.c \
main.c \
modutime.c \
modmachine.c \
modsamd.c \
mphalport.c \
pin_af.c \
$(BUILD)/pins.c \
samd_flash.c \
samd_isr.c \
samd_soc.c \
tusb_port.c \
lib/asf4/$(MCU_SERIES_LOWER)/hal/src/hal_atomic.c \
lib/asf4/$(MCU_SERIES_LOWER)/hal/src/hal_flash.c \
lib/asf4/$(MCU_SERIES_LOWER)/hpl/nvmctrl/hpl_nvmctrl.c \
lib/libm/ef_sqrt.c \
lib/libm/fmodf.c \
lib/libm/math.c \
lib/libm/nearbyintf.c \
lib/tinyusb/src/class/cdc/cdc_device.c \
lib/tinyusb/src/common/tusb_fifo.c \
lib/tinyusb/src/device/usbd.c \
lib/tinyusb/src/device/usbd_control.c \
lib/tinyusb/src/portable/microchip/samd/dcd_samd.c \
lib/tinyusb/src/tusb.c \
drivers/bus/softspi.c \
shared/libc/printf.c \
shared/libc/string0.c \
shared/readline/readline.c \
shared/runtime/gchelper_native.c \
shared/runtime/pyexec.c \
shared/runtime/stdout_helpers.c \
shared/runtime/sys_stdio_mphal.c \
shared/timeutils/timeutils.c \
SRC_C += $(SRC_MOD)
SRC_CXX += $(SRC_MOD_CXX)
ifeq ($(MCU_SERIES),SAMD21)
SRC_S = shared/runtime/gchelper_m0.s
else
SRC_S = shared/runtime/gchelper_m3.s
endif
# List of sources for qstr extraction
SRC_QSTR += \
machine_adc.c \
machine_led.c \
machine_pin.c \
machine_pwm.c \
modutime.c \
modmachine.c \
modsamd.c \
samd_flash.c \
shared/readline/readline.c \
SRC_QSTR += $(SRC_MOD) $(SRC_CXX)
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)/, $(SRC_MOD:.c=.o))
ifneq ($(FROZEN_MANIFEST),)
CFLAGS += -DMICROPY_MODULE_FROZEN_MPY
CFLAGS += -DMICROPY_MODULE_FROZEN_STR
CFLAGS += -DMICROPY_QSTR_EXTRA_POOL=mp_qstr_frozen_const_pool
endif
# Workaround for bug in older gcc, warning on "static usbd_device_t _usbd_dev = { 0 };"
$(BUILD)/lib/tinyusb/src/device/usbd.o: CFLAGS += -Wno-missing-braces
all: $(BUILD)/firmware.uf2
$(BUILD)/firmware.elf: $(OBJ)
$(ECHO) "LINK $@"
$(Q)$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
$(Q)$(SIZE) $@
$(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) -b $(TEXT0) -c -o $@ $<
pin_af.c: $(BUILD)/$(GEN_PIN_AF)
$(BUILD)/$(GEN_PIN_AF): $(PIN_AF_TABLE_CSV)
$(ECHO) "Create $@"
$(Q)$(PYTHON) $(MAKE_PIN_AF) --csv $(PIN_AF_TABLE_CSV) --table $(BUILD)/$(GEN_PIN_AF) --mcu $(MCU_SERIES)
$(GEN_PINS_SRC): $(BOARD_PINS)
$(ECHO) "Create $@"
$(Q)$(PYTHON) $(MAKE_PINS) --board $(BOARD_PINS) --pins $(GEN_PINS_SRC) --inc $(GEN_PINS_HDR)
include $(TOP)/py/mkrules.mk
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