213 lines
7.0 KiB
Makefile
213 lines
7.0 KiB
Makefile
# -----------------------------------------------------------------------------
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# Copyright (c) 2012, 2013, 2014 Ben Blazak <benblazak.dev@gmail.com>
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# Released under The MIT License (see "doc/license.md")
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# Project located at <https://github.com/benblazak/ergodox-firmware>
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# -----------------------------------------------------------------------------
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## description
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# Makefile for the firmware
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#
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# See '.../firmware/keyboard/.../options.mk' for options
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#
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# Notes:
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# - '.h' file dependencies are automatically generated
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#
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# History:
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# - This makefile was originally (extensively) modified from the WinAVR
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# makefile template, mostly by removing stuff. The copy I used was from
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# [pjrc : usb_keyboard] (http://pjrc.com/teensy/usb_keyboard.zip).
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#
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# -----------------------------------------------------------------------------
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KEYBOARD_NAME := ergodox
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# the name of the keyboard to build a firmware for
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TARGET := firmware
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# default name for the '.hex', '.eep', and '.map' files we'll be generating
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# -----------------------------------------------------------------------------
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include_options = \
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$(eval INCLUDED := $(1) $(INCLUDED)) \
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$(eval CURDIRS := $(CURDIR) $(CURDIRS)) \
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$(eval CURDIR := $(ROOTDIR)/$(1)) \
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$(eval include $(CURDIR)/options.mk) \
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$(eval CURDIR := $(firstword $(CURDIRS))) \
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$(eval CURDIRS := $(wordlist 2,$(words $(CURDIRS)),$(CURDIRS)))
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include_options_once = \
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$(if $(findstring $(1),$(INCLUDED)), \
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, \
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$(call include_options,$(1)))
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# -----------------------------------------------------------------------------
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.PHONY: default-target
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default-target: all
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# (to retain default behavior when included makefiles specify dependencies)
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CURDIR := .
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ROOTDIR := .
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INCLUDED :=
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# for including sub-makefiles
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# - by default, `CURDIR` is initialized to (an absolute path to) the
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# current working directory
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SRC :=
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CFLAGS :=
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LDFLAGS :=
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GENDEPFLAGS = # need to use delayed evaluation for this one
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# (initialize variables, so we can use `+=` below and in the included files)
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$(call include_options_once,keyboard/$(KEYBOARD_NAME))
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$(call include_options_once,lib/usb)
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$(call include_options_once,lib/timer)
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# -----------------------------------------------------------------------------
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SRC += $(wildcard $(CURDIR)/main.c)
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# (other source files included through the makefile included above)
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# -----------------------------------------------------------------------------
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CFLAGS += -mmcu=$(MCU) # processor type; must match real life
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CFLAGS += -DF_CPU=$(F_CPU) # processor frequency; must match initialization
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# in source
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CFLAGS += -std=gnu99 # use C99 plus GCC extensions
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CFLAGS += -Os # optimize for size
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CFLAGS += -Wall # enable lots of common warnings
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CFLAGS += -Wstrict-prototypes # "warn if a function is declared or defined
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# without specifying the argument types"
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CFLAGS += -fpack-struct # "pack all structure members together without holes"
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CFLAGS += -fshort-enums # "allocate to an 'enum' type only as many bytes as it
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# needs for the declared range of possible values"
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CFLAGS += -ffunction-sections # \ "place each function or data into its own
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CFLAGS += -fdata-sections # / section in the output file if the
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# target supports arbitrary sections." for
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# linker optimizations, and discarding
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# unused code.
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LDFLAGS += -Wl,-Map=$(TARGET).map,--cref # generate a link map, with a cross
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# reference table
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LDFLAGS += -Wl,--relax # for some linker optimizations
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LDFLAGS += -Wl,--gc-sections # discard unused functions and data
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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GENDEPFLAGS += -MMD -MP -MF $@.dep # generate dependency files
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# -----------------------------------------------------------------------------
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CC := avr-gcc
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OBJCOPY := avr-objcopy
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SIZE := avr-size
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# -----------------------------------------------------------------------------
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OBJ := $(SRC:%.c=%.o)
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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.PHONY: all clean cleanall all-layouts
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all: $(TARGET).hex $(TARGET).eep
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@echo
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@echo '---------------------------------------------------------------'
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@echo '------- done --------------------------------------------------'
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@echo
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$(SIZE) --target=$(BINARY_FORMAT) $(TARGET).hex
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@echo
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$(SIZE) --target=$(BINARY_FORMAT) $(TARGET).eep
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@echo
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@echo 'you can load "$(TARGET).hex" and "$(TARGET).eep" onto the'
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@echo 'Teensy using the Teensy loader'
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@echo
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@echo '---------------------------------------------------------------'
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@echo
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clean:
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@echo
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@echo '--- cleaning ---'
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@make clean-all-files KEYBOARD_LAYOUT=$(KEYBOARD_LAYOUT)
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cleanall:
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@echo
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@echo '--- cleaning ---'
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@for layout in $(KEYBOARD_LAYOUTS); do \
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make clean-all-files KEYBOARD_LAYOUT=$$layout; \
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done
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-@rm -vf $(KEYBOARD_LAYOUTS:%=firmware--%.hex)
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all-layouts:
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@for layout in $(KEYBOARD_LAYOUTS); do \
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echo; \
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echo '--- cleaning ---'; \
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make clean-target-files all KEYBOARD_LAYOUT=$$layout; \
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mv $(TARGET).hex $(TARGET)--$$layout.hex; \
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done
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@echo
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@echo '--- cleaning ---'
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@make clean-target-files
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# -----------------------------------------------------------------------------
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.PHONY: clean-all-files clean-object-files clean-target-files
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clean-all-files: clean-object-files clean-target-files
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clean-object-files:
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-@rm -vf $(OBJ) \
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$(OBJ:%=%.dep)
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clean-target-files:
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-@rm -vf $(TARGET).eep \
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$(TARGET).elf \
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$(TARGET).hex \
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$(TARGET).map
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# -----------------------------------------------------------------------------
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.SECONDARY:
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%.hex: %.elf
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@echo
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@echo '--- making $@ ---'
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# from the WinAVR makefile template (modified)
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$(OBJCOPY) -O $(BINARY_FORMAT) \
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-R .eeprom -R .fuse -R .lock -R .signature \
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$< $@
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%.eep: %.elf
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@echo
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@echo '--- making $@ ---'
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# from the WinAVR makefile template (modified)
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-$(OBJCOPY) -O $(BINARY_FORMAT) \
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-j .eeprom \
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--set-section-flags=.eeprom="alloc,load" \
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--change-section-lma .eeprom=0 \
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--no-change-warnings \
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$< $@ || exit 0
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$(TARGET).elf: $(OBJ)
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@echo
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@echo '--- making $@ ---'
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$(CC) $(strip $(CFLAGS)) $(strip $(LDFLAGS)) $^ --output $@
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%.o: %.c
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@echo
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@echo '--- making $@ ---'
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$(CC) -c $(strip $(CFLAGS)) $(strip $(GENDEPFLAGS)) $< -o $@
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# -----------------------------------------------------------------------------
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-include $(OBJ:%=%.dep)
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