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No binary output from objcopy

BDyi

Hello!

I am trying to make a bin image of my application for me to flash it into my ARM Cortex M0 processor. I have succeeded in outputting an elf  image, but failed with converting it to a bin with the arm-none-eabi-objcopy tool. Here is the line from the makefile:

%.$(TARGET).bin: %.$(TARGET).elf
	$(TRACE_OBJCOPY)
	$(Q)$(OBJCOPY) -O binary $< $@

Here is all of my Makefile.

#Set the toolchain program names.
CC = arm-none-eabi-gcc
AR = arm-none-eabi-ar
AS = arm-none-eabi-as
LD = arm-none-eabi-gcc
OBJCOPY = arm-none-eabi-objcopy


#Set the processor related flags (common to C code and linker).
CPUFLAGS += -mcpu=cortex-m0plus -mthumb -mfloat-abi=soft
CPUFLAGS += -specs=nano.specs -specs=nosys.specs


#Set common C code flags.
CFLAGS += -D__SAMD21G18A__=1
CFLAGS += -Wall -g -ffunction-sections -fdata-sections -O2
CFLAGS += $(CPUFLAGS)



#Set the linker flags.
LDFLAGS += -Wl,--gc-sections
LDFLAGS += -Wl,-T$(CONTIKI_CPU)/atsamd21g18a.ld -lc
LDFLAGS += -Wl,-Map=$(OBJECTDIR)/$(CONTIKI_PROJECT).map
LDFLAGS += $(CPUFLAGS)


#Configure the CPU path and source files.
CONTIKI_CPU_DIRS += .
CONTIKI_CPU_DIRS += dev
CONTIKI_CPU_DIRS += samd21dfp/
CONTIKI_CPU_DIRS += samd21dfp/samd21a/include
CONTIKI_CPU_DIRS += samd21dfp/samd21a/include/component
CONTIKI_CPU_DIRS += samd21dfp/samd21a/include/instance
CONTIKI_CPU_DIRS += ../arm/common/CMSIS


CONTIKI_SOURCEFILES += samd21-startup.c clock.c rtimer-arch.c
CONTIKI_SOURCEFILES += rtc.c evsys.c

PROJECT_OBJECTFILES += ${addprefix $(OBJECTDIR)/,$(CONTIKI_TARGET_MAIN:.c=.o)}


#Add objcopy to the verbosity control.
ifeq ($(V),1)
  TRACE_OBJCOPY =
else
  TRACE_OBJCOPY = @echo "  OBJCOPY  " $@
endif

#Don't treat project object files and syscalls.o as intermediates (avoids deletion and recompiling).
.SECONDARY: $(PROJECT_OBJECTFILES)
.SECONDARY: $(OBJECTDIR)/syscalls.o


#This rule creates a .bin image from the .elf file. Its output is made precious so it doesn't get
#deleted even if it's an intermediate.
.PRECIOUS: %.$(TARGET).bin
%.$(TARGET).bin: %.$(TARGET).elf
	$(TRACE_OBJCOPY)
	$(Q)$(OBJCOPY) -O binary $< $@


.PRECIOUS: %.$(TARGET).elf
%.$(TARGET).elf: %.co $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) contiki-$(TARGET).a \
                 $(OBJECTDIR)/syscalls.o $(CONTIKI_SOURCEFILES)
	$(TRACE_LD)
	$(Q)$(CC) $(LDFLAGS) -Wl,--section-start=.text=0x2000 $(TARGET_STARTFILES) ${filter-out %.a,$^} \
	    ${filter %.a,$^} $(TARGET_LIBFILES) -o $@ -I$(CONTIKI_CPU_DIRS) -I$(OBJECTDIR)


#Add the .elf file to the clean list.
CLEAN += *.$(TARGET).elf *.$(TARGET).bin

Parents
  • 0

    Your snippet doesn't define TARGET.  Is TARGET supposed to be an architecture, like M0 or M3 perhaps? Or the name of one of your applications, say test1, test2 etc?

    Let's say its M0. So

    %.M0.bin: %.MO.elf

    says that FOO.M0.bin can be built from FOO.M0.elf.  What is the name of your elf file?  If it's FOO.M0.elf, then

    $ make FOO.M0.bin

    should work.  Your recipe for that rule is correct, I use OBJCOPY just like you have stated all the time.

Reply
  • 0

    Your snippet doesn't define TARGET.  Is TARGET supposed to be an architecture, like M0 or M3 perhaps? Or the name of one of your applications, say test1, test2 etc?

    Let's say its M0. So

    %.M0.bin: %.MO.elf

    says that FOO.M0.bin can be built from FOO.M0.elf.  What is the name of your elf file?  If it's FOO.M0.elf, then

    $ make FOO.M0.bin

    should work.  Your recipe for that rule is correct, I use OBJCOPY just like you have stated all the time.

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