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firmware: add bootloader update "app"

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This bl updater can be flashed as app and will update the bootloader and
then
delete itself before resetting the sam3, so the device will end up in
the newly
updated dfu bootloader afterwards, without having to press the
bootloader button
or requring any other manual interaction, ready to receive a new
application image.

Building the blupdater requires a previously built dfu-flash bootloader
bin file that
will then be embedded into the app during building.

Related: OS#1704
Related: SYS5061
Change-Id: I53dea57bba790a2ab3245d9483e0ff1c8d19d5e3
This commit is contained in:
Eric Wild
2021-10-28 18:03:39 +02:00
committed by laforge
parent 020edca678
commit a7e306f745
5 changed files with 192 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
firmware/Makefile
View File

@@ -245,12 +245,13 @@ apps/$(APP)/usb_strings_generated.h: apps/$(APP)/usb_strings.txt.patched usbstri
define RULES
C_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(C_OBJECTS))
ASM_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(ASM_OBJECTS))
EXTRA_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(EXTRA_OBJECTS))
$(1): $$(ASM_OBJECTS_$(1)) $$(C_OBJECTS_$(1))
$(SILENT)$(CC) $(CFLAGS) $(LDFLAGS) $(LD_OPTIONAL) -T"libboard/common/resources/$(CHIP)/$$@.ld" -Wl,-Map,$(OUTPUT)-$$@.map -o $(OUTPUT)-$$@.elf $$^ $(LIBS)
$(SILENT)$(NM) $(OUTPUT)-$$@.elf >$(OUTPUT)-$$@.elf.txt
$(SILENT)$(OBJCOPY) -O binary $(OUTPUT)-$$@.elf $(OUTPUT)-$$@.bin
$(SILENT)$(SIZE) $$^ $(OUTPUT)-$$@.elf
build_$(1): $$(ASM_OBJECTS_$(1)) $$(C_OBJECTS_$(1)) $$(EXTRA_OBJECTS_$(1))
$(SILENT)$(CC) $(CFLAGS) $(LDFLAGS) $(LD_OPTIONAL) -T"libboard/common/resources/$(CHIP)/$(1).ld" -Wl,-Map,$(OUTPUT)-$(1).map -o $(OUTPUT)-$(1).elf $$^ $(LIBS)
$(SILENT)$(NM) $(OUTPUT)-$(1).elf >$(OUTPUT)-$(1).elf.txt
$(SILENT)$(OBJCOPY) -O binary $(OUTPUT)-$(1).elf $(OUTPUT)-$(1).bin
$(SILENT)$(SIZE) $$^ $(OUTPUT)-$(1).elf
$$(C_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.c Makefile $(OBJ) $(BIN)
@echo [COMPILING $$<]
@@ -258,13 +259,34 @@ $$(C_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.c Makefile $(OBJ) $(BIN)
$$(ASM_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.S Makefile $(OBJ) $(BIN)
@echo [ASSEMBLING $$@]
$(SILENT)@$(CC) $(ASFLAGS) -DENVIRONMENT_$(1) -DENVIRONMENT=\"$(1)\" -c -o $$@ $$<
$(SILENT)$(CC) $(ASFLAGS) -DENVIRONMENT_$(1) -DENVIRONMENT=\"$(1)\" -c -o $$@ $$<
debug_$(1): $(1)
$(GDB) -x "$(BOARD_LIB)/resources/gcc/$(BOARD)_$(1).gdb" -ex "reset" -readnow -se $(OUTPUT)-$(1).elf
endef
$(foreach MEMORY, $(MEMORIES), $(eval $(call RULES,$(MEMORY))))
ALL_MEMORIES = dfu flash ram
$(foreach MEMORY, $(ALL_MEMORIES), $(eval $(call RULES,$(MEMORY))))
# files with those names do exist..
.PHONY: ram
.PHONY: dfu
.PHONY: flash
ram: build_ram
dfu: build_dfu
ifeq ($(APP), blupdate)
$(info updating updater section with padded bootloader file..)
$(SILENT)dd if=/dev/zero bs=16384 count=1 of=$(BIN)/$(BOARD)-dfu-flash-padded.bin
$(SILENT)dd if=$(BIN)/$(BOARD)-dfu-flash.bin conv=notrunc of=$(BIN)/$(BOARD)-dfu-flash-padded.bin
$(SILENT)$(OBJCOPY) --update-section .blupdate=bin/$(BOARD)-dfu-flash-padded.bin bin/$(BOARD)-blupdate-dfu.elf
$(SILENT)$(OBJCOPY) -O binary bin/$(BOARD)-blupdate-dfu.elf bin/$(BOARD)-blupdate-dfu.bin
endif
flash: build_flash
#alternate way of embedding: obj file
#ifeq ($(APP), dfu)
# $(info bootloader bin file to obj..)
# $(SILENT)$(OBJCOPY) --rename-section .data=.fwupdate -I binary -O elf32-littlearm bin/$(BOARD)-dfu-flash.bin $(OBJ)/flash_fwupdate.o
#endif
program:
openocd -f openocd/openocd.cfg -c "init" -c "halt" -c "flash write_bank 0 ./bin/project-flash.bin 0" -c "reset" -c "shutdown"