# 
# Makefile for Peter Dannegger's bootloader, to be used with the GNU
# toolchest (as opposed to Atmel's Assembler).
#
# Time-stamp: <2010-02-01 12:20:02 hcz>
MCU = attiny45
F_CPU = 1000000

ATMEL_INC= ./atmel/tn45def.inc

STX_PORT = PORTB
STX = PB4

SRX_PORT = PORTB
SRX = PB4

SHELL=/bin/bash

CFLAGS = -mmcu=$(MCU) -DF_CPU=$(F_CPU) 
CFLAGS += -I . -I ./added -I ./converted -I./atmel
CFLAGS += -ffreestanding
CFLAGS += -g$(DEBUG)
CFLAGS += -L,-g$(DEBUG)
CFLAGS += -DRAM_START=$(SRAM_START) -DSRAM_SIZE=$(SRAM_SIZE)
CFLAGS += -DSTX_PORT=$(STX_PORT) -DSTX=$(STX)
CFLAGS += -DSRX_PORT=$(SRX_PORT) -DSRX=$(SRX)

AUTO_CONVERTED_FILES = \
  converted/progtiny.inc \
  converted/uart.inc \
  converted/password.inc \
  converted/progmega.inc \
  converted/watchdog.inc \
  converted/bootload.asm \
  converted/abaud.inc \
  converted/command.inc \
  converted/protocol.h \
  converted/apicall.inc \
  converted/verify.inc \
  converted/message.inc

MANUALLY_ADDED_FILES = \
  added/fastload.inc \
  added/fastload.h \
  added/mangled_case.h \
  added/bootload.S \
  added/compat.h \
  added/fastload.h

ADDITIONAL_DEPENDENCIES = atmel_def.h

ASMSRC = $(AUTO_CONVERTED_FILES) $(MANUALLY_ADDED_FILES)

include atmel_def.mak

ifdef BOOTRST
STUB_OFFSET = 510 
LOADER_START = ( $(FLASHEND) * 2 ) - 510
endif

all: bootload.hex

bootload.hex: bootload.elf

bootload.elf : bootload.o stub.o
ifndef BOOTRST
	vars="$$(./get_text_addrs.sh $(FLASHEND))"; \
	arch="$$(./get_avr_arch.sh -mmcu=$(MCU) bootload.o)"; \
	echo "arch=$$arch";\
	echo "$$vars"; \
	eval "$$vars"; \
	sed -e "s/@LOADER_START@/$$LOADER_START/g" \
	    -e s"/@ARCH@/$$arch/" \
	    -e s'/@RAM_START@/$(SRAM_START)/g' \
	    -e s'/@RAM_SIZE@/$(SRAM_SIZE)/g' \
	    -e "s/@STUB_OFFSET@/$$STUB_OFFSET/g" \
	    bootload.template.x > bootload.x; \
	avr-ld -N -E -T bootload.x -Map=$(patsubst %.elf,%,$@).map \
	  --cref $+ -o $@ --defsym Application="$$LOADER_START-2"
else
	vars="$$(./get_bootsection_addrs.sh $(FLASHEND) $(FIRSTBOOTSTART) \
                $(SECONDBOOTSTART) $(THIRDBOOTSTART) $(FORTHBOOTSTART))"; \
	arch="$$(./get_avr_arch.sh -mmcu=$(MCU) bootload.o)"; \
	echo "arch=$$arch";\
	echo "$$vars"; \
	eval "$$vars"; \
	sed -e "s/@LOADER_START@/$$LOADER_START/g" \
	    -e s"/@ARCH@/$$arch/" \
	    -e s'/@RAM_START@/$(SRAM_START)/g' \
	    -e s'/@RAM_SIZE@/$(SRAM_SIZE)/g' \
	    -e "s/@STUB_OFFSET@/$$STUB_OFFSET/g" \
	    bootload.template.x > bootload.x; \
	avr-ld -N -E -T bootload.x -Map=$(patsubst %.elf,%,$@).map \
	  --cref $+ -o $@ --defsym Application=0
endif

atmel_def.h: $(ATMEL_INC) Makefile
	./_conv.awk $< | gawk '/PAGESIZE|SIGNATURE_|SRAM_|FLASHEND|BOOT/' > $@

atmel_def.mak: atmel_def.h
	gawk '{ printf "%s = %s\n", $$2, $$3 }' $< > $@


bootload.o: $(ASMSRC) $(ADDITIONAL_DEPENDENCIES)
	avr-gcc -c -Wa,-adhlns=bootload.lst $(CFLAGS) added/bootload.S -o $@

stub.o: added/stub.S
	avr-gcc -c -Wa,-adhlns=stub.lst $(CFLAGS) $< -o $@

%.hex: %.elf
	avr-objcopy -O ihex $< $@

.PHONY: clean dbg

clean: 
	rm -f atmel_def.h bootload.x *.defs *.o *.gas *.mak *.lst *.02x *.map

dbg:
	avr-cpp $(CFLAGS) -dD -E added/bootload.S > bootload.defs
	avr-gcc -E $(CFLAGS) added/bootload.S -o bootload.gas




cmp:  BOOTLOAD.02x bootload.02x
	@if ! diff -q $?; then \
	  echo "Files differ" ; \
	  diff $? \
	  | ./diff2addr.sh ;\
	  echo "'<' means original data (avrasm), '>' new (gcc), '()' word address."; \
	  exit 1; \
	else \
	  echo "Files match. OK."; \
	fi

%.bin: %.hex
	avr-objcopy -I ihex -O binary $< $@

%.02x: %.bin
	hexdump -e '1/2 "%04x" "\n"' $< > $@


DISTFILES = $(AUTO_CONVERTED_FILES) $(MANUALLY_ADDED_FILES)
DISTFILES += $(ADDITIONAL_DEPENDENCIES)
DISTFILES += bootload.template.x diff2addr.sh README Makefile _conv.awk build_no
DISTFILES += get_text_addrs.sh get_bootsection_addrs.sh added/stub.S
DISTFILES += get_avr_arch.sh

dist:
	tar --directory .. -czf \
	fastboot_build$(shell \
	  build_no=$$(($$(cat build_no 2>/dev/null)+1)); \
	  echo $$build_no | tee build_no).tar.gz \
	$(patsubst %, fastboot/%, $(DISTFILES))
	echo "build$$(< build_no) - $$(date -Isec) ($${USER:-unknown})" >> build_no-timestamps

bincmp: 
	objcopy -I ihex -O binary bootload.hex bootload.bin
	cmp BOOTLOAD.bin bootload.bin

checkdist:
	rm -rf fastboot.test
	set -- fastboot_build*.tar.gz; \
	tar xvzf $$_ 
	mv fastboot fastboot.test
	cd fastboot.test; \
	cp ../m168def.inc .; \
	make