# Name: Makefile
# Project: PowerSwitch
# Author: Christian Starkjohann
# Creation Date: 2004-12-29
# Tabsize: 4
# Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
# License: GNU GPL v2 (see License.txt) or proprietary (CommercialLicense.txt)
#
# Edited by Daniel Friesel

MCU ?= attiny2313
AVRDUDE_PROGRAMMER ?= usbasp

AVRCC ?= avr-gcc
AVRFLASH ?= avrdude
AVRNM ?= avr-nm
AVROBJCOPY ?= avr-objcopy
AVROBJDUMP ?= avr-objdump

CFLAGS += -mmcu=attiny2313 -DF_CPU=16000000
CFLAGS += -Wall -Os -Iusbdrv -I.

OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o

all: main.hex

.c.o:
	${AVRCC} ${CFLAGS} -c $< -o $@

.S.o:
	${AVRCC} ${CFLAGS} -x assembler-with-cpp -c $< -o $@
# "-x assembler-with-cpp" should not be necessary since this is the default
# file type for the .S (with capital S) extension. However, upper case
# characters are not always preserved on Windows. To ensure WinAVR
# compatibility define the file type manually.

.c.s:
	${AVRCC} ${CFLAGS} -S $< -o $@

program:	all fuse_tiny2313
	${AVRFLASH} -p ${MCU} -c ${AVRDUDE_PROGRAMMER} -U flash:w:main.hex:i


# Fuse low byte:
# 0xef = 1 1 1 0   1 1 1 1
#        ^ ^ \+/   \--+--/
#        | |  |       +------- CKSEL 3..0 (clock selection -> crystal @ 12 MHz)
#        | |  +--------------- SUT 1..0 (BOD enabled, fast rising power)
#        | +------------------ CKOUT (clock output on CKOUT pin -> disabled)
#        +-------------------- CKDIV8 (divide clock by 8 -> don't divide)
#
# Fuse high byte:
# 0xdb = 1 1 0 1   1 0 1 1
#        ^ ^ ^ ^   \-+-/ ^
#        | | | |     |   +---- RSTDISBL (disable external reset -> enabled)
#        | | | |     +-------- BODLEVEL 2..0 (brownout trigger level -> 2.7V)
#        | | | +-------------- WDTON (watchdog timer always on -> disable)
#        | | +---------------- SPIEN (enable serial programming -> enabled)
#        | +------------------ EESAVE (preserve EEPROM on Chip Erase -> not preserved)
#        +-------------------- DWEN (debug wire enable)
fuse_tiny2313:	# only needed for attiny2313
	${AVRFLASH} -p ${MCU} -c ${AVRDUDE_PROGRAMMER} -U hfuse:w:0xdb:m -U lfuse:w:0xef:m


clean:
	rm -f main.hex main.lst main.obj main.cof main.list main.map main.eep.hex main.bin *.o usbdrv/*.o main.s usbdrv/oddebug.s usbdrv/usbdrv.s

# file targets:
main.bin: ${OBJECTS}
	${AVRCC} ${CFLAGS} -o main.bin $(OBJECTS)

main.hex:	main.bin
	rm -f main.hex main.eep.hex
	${AVROBJCOPY} -j .text -j .data -O ihex main.bin main.hex
	./checksize main.bin
# do the checksize script as our last action to allow successful compilation
# on Windows with WinAVR where the Unix commands will fail.

disasm: main.bin
	${AVROBJDUMP} -d main.bin

cpp:
	${AVRCC} ${CFLAGS} -E main.c

.PHONY: all program fuse_tiny2313 clean disasm cpp