Makefile

   1 # Hey Emacs, this is a -*- makefile -*-
   2
   3 # AVR-GCC Makefile template, derived from the WinAVR template (which
   4 # is public domain), believed to be neutral to any flavor of "make"
   5 # (GNU make, BSD make, SysV make)
   6
   7 MCU = atmega32
   8 F_CPU = 16000000UL
   9
  10 FORMAT = ihex
  11 TARGET = main
  12
  13 BASEDIR = src
  14 SRC = $(BASEDIR)/$(TARGET).c \
  15       $(BASEDIR)/lib/fifo.c \
  16       $(BASEDIR)/lib/usart.c
  17 ASRC =
  18 OPT = s
  19
  20 # Name of this Makefile (used for "make depend").
  21 MAKEFILE = Makefile
  22
  23 # Debugging format.
  24 # Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
  25 # AVR (extended) COFF requires stabs, plus an avr-objcopy run.
  26 DEBUG = stabs
  27
  28 # Compiler flag to set the C Standard level.
  29 # c89   - "ANSI" C
  30 # gnu89 - c89 plus GCC extensions
  31 # c99   - ISO C99 standard (not yet fully implemented)
  32 # gnu99 - c99 plus GCC extensions
  33 CSTANDARD = -std=gnu99
  34
  35 # Place -D or -U options here
  36 CDEFS =
  37
  38 # Place -I options here
  39 CINCS =
  40
  41 CDEBUG = -g$(DEBUG)
  42 CWARN = -Wall -Wstrict-prototypes
  43 CTUNING = -funsigned-char -funsigned-bitfields \
  44           -fpack-struct -fshort-enums -ffreestanding \
  45           -ffunction-sections -fdata-sections
  46
  47 CEXTRA = -Wa,-adhlns=$(<:.c=.lst)
  48 CFLAGS = $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CWARN) $(CSTANDARD) $(CEXTRA)
  49
  50 #ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
  51
  52 #Additional libraries.
  53
  54 # Minimalistic printf version
  55 PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
  56
  57 # Floating point printf version (requires MATH_LIB = -lm below)
  58 PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt
  59
  60 PRINTF_LIB =
  61
  62 # Minimalistic scanf version
  63 SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min
  64
  65 # Floating point + %[ scanf version (requires MATH_LIB = -lm below)
  66 SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt
  67
  68 SCANF_LIB =
  69
  70 MATH_LIB = -lm
  71
  72 # External memory options
  73
  74 # 64 KB of external RAM, starting after internal RAM (ATmega128!),
  75 # used for variables (.data/.bss) and heap (malloc()).
  76 #EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff
  77
  78 # 64 KB of external RAM, starting after internal RAM (ATmega128!),
  79 # only used for heap (malloc()).
  80 #EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff
  81
  82 EXTMEMOPTS =
  83
  84 #LDMAP = $(LDFLAGS) -Wl,-Map=$(TARGET).map,--cref
  85 LDFLAGS = $(EXTMEMOPTS) $(LDMAP) $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
  86
  87
  88 # Programming support using avrdude. Settings and variables.
  89
  90 AVRDUDE_PROGRAMMER = avrispmkII
  91 AVRDUDE_PORT = usb
  92
  93 AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
  94 #AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
  95
  96
  97 # Uncomment the following if you want avrdude's erase cycle counter.
  98 # Note that this counter needs to be initialized first using -Yn,
  99 # see avrdude manual.
 100 #AVRDUDE_ERASE_COUNTER = -y
 101
 102 # Uncomment the following if you do /not/ wish a verification to be
 103 # performed after programming the device.
 104 #AVRDUDE_NO_VERIFY = -V
 105
 106 # Increase verbosity level.  Please use this when submitting bug
 107 # reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
 108 # to submit bug reports.
 109 #AVRDUDE_VERBOSE = -v -v
 110
 111 AVRDUDE_BASIC = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
 112 AVRDUDE_FLAGS = $(AVRDUDE_BASIC) $(AVRDUDE_NO_VERIFY) $(AVRDUDE_VERBOSE) $(AVRDUDE_ERASE_COUNTER)
 113
 114
 115 CC = avr-gcc
 116 OBJCOPY = avr-objcopy
 117 OBJDUMP = avr-objdump
 118 SIZE = avr-size
 119 NM = avr-nm
 120 AVRDUDE = avrdude
 121 REMOVE = rm -f
 122 MV = mv -f
 123
 124 # Define all object files.
 125 OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
 126
 127 # Define all listing files.
 128 LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)
 129
 130 # Combine all necessary flags and optional flags.
 131 # Add target processor to flags.
 132 ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) -DF_CPU=$(F_CPU) -Wl,--relax,--gc-sections
 133 ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS) -DF_CPU=$(F_CPU)
 134
 135
 136 # Default target.
 137 all: build
 138
 139 build: elf hex eep
 140
 141 elf: $(TARGET).elf
 142 hex: $(TARGET).hex
 143 eep: $(TARGET).eep
 144 lss: $(TARGET).lss
 145 sym: $(TARGET).sym
 146
 147 # Program the device.
 148 program: $(TARGET).hex $(TARGET).eep
 149         $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
 150
 151 # Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
 152 COFFCONVERT=$(OBJCOPY) --debugging \
 153 --change-section-address .data-0x800000 \
 154 --change-section-address .bss-0x800000 \
 155 --change-section-address .noinit-0x800000 \
 156 --change-section-address .eeprom-0x810000
 157
 158 coff: $(TARGET).elf
 159         $(COFFCONVERT) -O coff-avr $(TARGET).elf $(TARGET).cof
 160
 161
 162 extcoff: $(TARGET).elf
 163         $(COFFCONVERT) -O coff-ext-avr $(TARGET).elf $(TARGET).cof
 164
 165 .SUFFIXES: .elf .hex .eep .lss .sym
 166
 167 .elf.hex:
 168         $(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
 169
 170 .elf.eep:
 171         -$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
 172         --change-section-lma .eeprom=0 -O $(FORMAT) $< $@
 173
 174 # Create extended listing file from ELF output file.
 175 .elf.lss:
 176         $(OBJDUMP) -h -S $< > $@
 177
 178 # Create a symbol table from ELF output file.
 179 .elf.sym:
 180         $(NM) -n $< > $@
 181
 182
 183 # Link: create ELF output file from object files.
 184 $(TARGET).elf: $(OBJ)
 185         $(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)
 186
 187
 188 # Compile: create object files from C source files.
 189 .c.o:
 190         $(CC) -c $(ALL_CFLAGS) $< -o $@
 191
 192 # Compile: create assembler files from C source files.
 193 .c.s:
 194         $(CC) -S $(ALL_CFLAGS) $< -o $@
 195
 196 # Assemble: create object files from assembler source files.
 197 .S.o:
 198         $(CC) -c $(ALL_ASFLAGS) $< -o $@
 199
 200 # XXX: Determine free flash
 201 size:   $(TARGET).elf
 202         tools/space.sh $^
 203
 204 # XXX: Flash consumption details
 205 size-detail: $(TARGET).elf
 206         tools/space-detail.sh $^
 207
 208 # Target: clean project.
 209 clean:
 210         $(REMOVE) $(TARGET).hex $(TARGET).eep $(TARGET).cof $(TARGET).elf \
 211         $(TARGET).map $(TARGET).sym $(TARGET).lss \
 212         $(OBJ) $(LST) $(SRC:.c=.s) $(SRC:.c=.d)
 213
 214 depend:
 215         if grep '^# DO NOT DELETE' $(MAKEFILE) >/dev/null; \
 216         then \
 217                 sed -e '/^# DO NOT DELETE/,$$d' $(MAKEFILE) > \
 218                         $(MAKEFILE).$$$$ && \
 219                 $(MV) $(MAKEFILE).$$$$ $(MAKEFILE); \
 220         fi
 221         echo '# DO NOT DELETE THIS LINE -- make depend depends on it.' \
 222                 >> $(MAKEFILE); \
 223         $(CC) -M -mmcu=$(MCU) $(CDEFS) $(CINCS) $(SRC) $(ASRC) >> $(MAKEFILE)
 224
 225 .PHONY: all build elf hex eep lss sym program coff extcoff clean depend size size-detail