150 lines
5.4 KiB
Makefile
150 lines
5.4 KiB
Makefile
# -----------------------------------------------------------------------------
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# Copyright (c) 2012, 2013 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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# TODO: generate symbol table ('.sym' file) instead of the '.map' file
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# - (make sure it's more readable first)
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# - (change the documentation (search for '.map' in this file))
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# - use 'avr-nm' to generate $(TARGET).sym separately from the compile
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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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OLD_CURDIR := $(CURDIR)
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# -------
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CURDIR := $(CURDIR)/keyboard/$(KEYBOARD_NAME)
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include $(CURDIR)/options.mk
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# (the place for everything a keyboard implementation might want to change)
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# -------
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CURDIR := $(OLD_CURDIR)
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SRC += $(CURDIR)/main.c
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# (other source files included through the makefile included above)
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# -----------------------------------------------------------------------------
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CFLAGS := -mmcu=$(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
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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=$(FORMAT) $(TARGET).hex
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@echo
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$(SIZE) --target=$(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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git clean -dX # remove ignored files and directories
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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 $(FORMAT) \
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-R .eeprom -R .fuse -R .lock -R .signature \
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'$<' '$@'
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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 $(FORMAT) \
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-j .eeprom \
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--set-section-flags=.eeprom="alloc,load" \
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--change-section-lma .eeprom=0 \
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--no-change-warnings \
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'$<' '$@' || exit 0
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%.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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