mk/avr.rules.mk

   1
   2 # Be silent per default, but 'make V=1' will show all compiler calls.
   3 ifneq ($(V),1)
   4 Q       := @
   5 NULL    := 2>/dev/null
   6 else
   7 QP      := \#
   8 endif
   9
  10 ###############################################################################
  11 # Executables
  12
  13 CC              = avr-gcc
  14 LD              = avr-gcc
  15 OBJCOPY         = avr-objcopy
  16 OBJDUMP         = avr-objdump
  17 SIZE            = avr-size
  18 NM              = avr-nm
  19 AVRDUDE         = avrdude
  20 RM              = rm -f
  21 COPY            = cp
  22
  23 OPT             := -Os
  24 CSTD            ?= -std=gnu11
  25
  26 ###############################################################################
  27 # Define all object files.
  28
  29 OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
  30
  31 ###############################################################################
  32 # C flags
  33
  34 TGT_CFLAGS      += -mmcu=$(MCU) $(OPT) $(CSTD) -g
  35 TGT_CFLAGS      += $(ARCH_FLAGS)
  36 TGT_CFLAGS      += -Wextra -Wshadow -Wimplicit-function-declaration -Wimplicit-fallthrough=1
  37 TGT_CFLAGS      += -Wredundant-decls -Wstrict-prototypes
  38 TGT_CFLAGS      += -fshort-enums -funsigned-bitfields
  39 TGT_CFLAGS      += -fno-common -ffunction-sections -fdata-sections
  40 TGT_CFLAGS      += -mrelax
  41
  42 ###############################################################################
  43 # C & C++ preprocessor common flags
  44
  45 TGT_CPPFLAGS    += -MMD -MP -MF .dep/$(@F:%.o=%.d)
  46 TGT_CPPFLAGS    += -Wall -Wundef
  47 TGT_CPPFLAGS    += -DF_CPU=$(F_CPU)UL $(CDEFS) $(CINCS)
  48
  49 ###############################################################################
  50 # Linker flags
  51
  52 TGT_LDFLAGS             += $(ARCH_FLAGS)
  53 TGT_LDFLAGS             += -Wl,-Map=$(TARGET).map,--cref
  54 TGT_LDFLAGS             += -Wl,--gc-sections
  55
  56 ###############################################################################
  57 # Avrdude
  58
  59 AVRDUDE_PORT ?= usb
  60 AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
  61 AVRDUDE_BASIC = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
  62 AVRDUDE_FLAGS = $(AVRDUDE_BASIC) $(AVRDUDE_NO_VERIFY) $(AVRDUDE_VERBOSE)
  63
  64 ###############################################################################
  65
  66 .SUFFIXES: .elf .hex .lss .map .sym
  67 .SECONDARY:
  68
  69 .PHONY: elf hex lss sym size
  70 elf: $(TARGET).elf
  71 hex: $(TARGET).hex
  72 lss: $(TARGET).lss
  73 sym: $(TARGET).sym
  74
  75 size: $(TARGET).elf
  76         @#$(QP)printf "  SIZE $(TARGET).elf\n"
  77         $(Q)$(SIZE) $(TARGET).elf
  78
  79 # Program the device.
  80 .PHONY: flash fuses
  81 flash: $(TARGET).hex
  82         $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH)
  83
  84 fuses:
  85         $(AVRDUDE) $(AVRDUDE_FLAGS) -u -U hfuse:w:$(HFUSE):m -U lfuse:w:$(LFUSE):m
  86
  87 %.hex: %.elf
  88         @$(QP)printf "  OBJCOPY $(*).hex\n"
  89         $(Q)$(OBJCOPY) -Oihex -R .eeprom $< $@
  90
  91 # Create extended listing file from ELF output file.
  92 %.lss: %.elf
  93         @$(QP)printf "  OBJDUMP $@\n"
  94         $(Q)$(OBJDUMP) -h -S $< > $@
  95
  96 # Create a symbol table from ELF output file.
  97 %.sym: %.elf
  98         @$(QP)printf "  NM $@\n"
  99         $(Q)$(NM) -n $< > $@
 100
 101 # Link: create ELF output file from object files.
 102 %.elf %.map: $(OBJ)
 103         @$(QP)printf "  LD      $@\n"
 104         $(Q)$(LD) $(TGT_CFLAGS) $(CFLAGS) $(TGT_LDFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
 105
 106
 107 # Compile: create object files from C source files.
 108 %.o: %.c
 109         @$(QP)printf "  CC      $<\n"
 110         $(Q)$(CC) $(TGT_CFLAGS) $(CFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $@ -c $<
 111
 112 # Target: clean project.
 113 .PHONY: clean distclean dist
 114 clean:
 115         @$(QP)printf "  CLEAN\n"
 116         $(Q)$(RM) $(OBJ) $(SRC:.c=.s) .dep/* $(TARGET).elf \
 117         $(TARGET).hex $(TARGET).lss $(TARGET).map $(TARGET).sym
 118
 119 distclean: clean
 120         @$(QP)printf "  DISTCLEAN\n"
 121         $(Q)$(RM) $(TARGET).tar.gz
 122
 123 dist: build
 124         tar cvfz $(TARGET).tar.gz \
 125         $(SRC) \
 126         $(TARGET).hex $(TARGET).eep
 127
 128 # Include the dependency files.
 129 -include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)