Makefile.include

##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
## Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
## Copyright (C) 2013 Rikard Lindström <ornotermes@gmail.com>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This library is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with this library.  If not, see <http://www.gnu.org/licenses/>.
##

PREFIX	?= arm-none-eabi
CC		= $(PREFIX)-gcc
LD		= $(PREFIX)-gcc
OBJCOPY		= $(PREFIX)-objcopy
OBJDUMP		= $(PREFIX)-objdump
GDB		= $(PREFIX)-gdb --tui
SIZE		= $(PREFIX)-size

TOOLCHAIN_DIR	= $(USER)/gcc-arm-none-eabi/gcc-arm-none-eabi
INCLUDE_DIR	= $(TOOLCHAIN_DIR)/include
LIB_DIR		= $(TOOLCHAIN_DIR)/lib
BIN_DIR		= $(TOOLCHAIN_DIR)/bin

ARCH_FLAGS      = -mthumb -mcpu=cortex-m3 -msoft-float
CFLAGS		+= -Os -g \
		   -Wall -Wextra -Wimplicit-function-declaration \
		   -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
		   -Wundef -Wshadow \
		   -I$(INCLUDE_DIR) \
		   -fno-common $(ARCH_FLAGS) -MD -DSTM32F1
LDSCRIPT	?= $(BINARY).ld
LDFLAGS		+= --static -Wl,--start-group -lc -lm -lgcc -Wl,--end-group \
		   -L$(LIB_DIR) \
		   -T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections \
		   $(ARCH_FLAGS) -mfix-cortex-m3-ldrd


OBJS		+= $(BINARY).o

# Be silent per default, but 'make V=1' will show all compiler calls.
 ifneq ($(V),1)
 Q := @
 NULL := 2>/dev/null
 else
LDFLAGS += -Wl,--print-gc-sections
 endif

.SUFFIXES: .elf .bin .hex .srec .list .images
.SECONDEXPANSION:
.SECONDARY:

all: images

images: $(BINARY).images
flash: $(BINARY).flash
debug: $(BINARY).debug

%.images: %.bin %.hex %.srec %.list
	@#echo "*** $* images generated ***"
	$(Q)$(SIZE) $(BINARY).elf

%.bin: %.elf
	@#printf "  OBJCOPY $(*).bin\n"
	$(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin

%.hex: %.elf
	@#printf "  OBJCOPY $(*).hex\n"
	$(Q)$(OBJCOPY) -Oihex $(*).elf $(*).hex

%.srec: %.elf
	@#printf "  OBJCOPY $(*).srec\n"
	$(Q)$(OBJCOPY) -Osrec $(*).elf $(*).srec

%.list: %.elf
	@#printf "  OBJDUMP $(*).list\n"
	$(Q)$(OBJDUMP) -S $(*).elf > $(*).list

%.elf: $(OBJS) $(LDSCRIPT)
	@#printf "  LD      $(subst $(shell pwd)/,,$(@))\n"
	$(Q)$(LD) -o $(*).elf $(OBJS) -lopencm3_stm32f1 $(LDFLAGS)

%.o: %.c Makefile
	@#printf "  CC      $(subst $(shell pwd)/,,$(@))\n"
	$(Q)$(CC) $(CFLAGS) -o $@ -c $<

clean:
	$(Q)rm -f *.o
	$(Q)rm -f *.d
	$(Q)rm -f *.elf
	$(Q)rm -f *.bin
	$(Q)rm -f *.hex
	$(Q)rm -f *.srec
	$(Q)rm -f *.list

%.flash: %.images
	@echo "  GDB   $(*).elf (flash)"
	$(Q)$(GDB) --batch \
		-ex "target remote :3333" \
		-ex "monitor reset halt" \
		-ex "load" \
		-ex "monitor reset" \
		$(*).elf

%.debug: %.images
	@echo "  GDB   $(*).elf (debug)"
	$(Q)$(GDB) \
		-ex "set height 0" \
		-ex "set history save on" \
		-ex "set history filename ~/.gdb-history-arm" \
		-ex "set history size 1000" \
		-ex "set remote hardware-breakpoint-limit 6" \
		-ex "set remote hardware-watchpoint-limit 4" \
		-ex "target remote :3333" \
		-ex "monitor reset halt" \
		-ex "load" \
		-ex "monitor reset" \
		$(*).elf

.PHONY: images clean

-include $(OBJS:.o=.d)