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+# Makefile.isp for Optiboot
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+# Bill Westfield (WestfW@yahoo.com) March, 2013
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+# $Id$
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+#
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+# Instructions:
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+#
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+# This is a "daughter" Makefile that burns the bootloader using a ISP
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+# device programmer. It is designed to inherit assorted variables from
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+# the parent optiboot "Makefile"... Using a daughter makefile makes
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+# certain variable manipulations more obvious.
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+#
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+# To burn bootloader .hex file, invoke the main Makefile using:
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+# make diecimila_isp
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+# make lilypad_isp
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+# make ng_isp
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+# etc...
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+
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+#
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+# Note: inherit paths/etc from parent Makefile.
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+#
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+
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+#---------------------------------------------------------------------------
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+
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+# enter the parameters for the avrdude isp tool -b19200
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+#
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+
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+# Inherit avrdude paths from top-level makefile
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+AVRDUDE_ROOT ?= $(GCCROOT)
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+AVRDUDE_CONF ?= -C$(TOOLROOT)/avr/etc/avrdude.conf
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+
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+# These are the parameters for a usb-based STK500v2 programmer.
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+# Exact type unknown. (historical Makefile values.)
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+#ISPTOOL = stk500v2
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+#ISPPORT = usb
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+#ISPSPEED = -b 115200
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+#
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+#
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+# These are parameters for using an Arduino with the ArduinoISP sketch
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+# as the programmer. On a mac, for a particular Uno as programmer.
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+ISPTOOL ?= stk500v1
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+ISPPORT ?= /dev/tty.usbmodemfd3141
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+ISPSPEED ?= -b19200
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+
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+
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+
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+# Not all chips have EFUSE.
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+
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+ifdef EFUSE
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+EFUSE_CMD= -U efuse:w:0x$(EFUSE):m
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+endif
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+
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+
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+# There are certain complicated caused by the fact that the default state
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+# of a fuse is a "1" rather than a "0", especially with respect to fuse bits
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+# that have not been implemented. Those would normally not be included, but
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+# unimplemented fuses still default to being "1"
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+#
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+# the efuse should really be 0xf8; since, however, only the lower
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+# three bits of that byte are used on the atmega168, avrdude gets
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+# confused if you specify 1's for the higher bits, see:
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+# http://tinker.it/now/2007/02/24/the-tale-of-avrdude-atmega168-and-extended-bits-fuses/
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+#
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+# similarly, the lock bits should be 0xff instead of 0x3f (to
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+# unlock the bootloader section) and 0xcf instead of 0x2f (to
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+# lock it), but since the high two bits of the lock byte are
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+# unused, avrdude would get confused.
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+
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+# Set fuses and unlock memory
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+ISPFUSES = $(AVRDUDE_ROOT)avrdude $(AVRDUDE_CONF) -c $(ISPTOOL) \
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+ -p $(MCU_TARGET) -P $(ISPPORT) $(ISPSPEED) \
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+ -e -u -U lock:w:0x3f:m $(EFUSE_CMD) \
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+ -U hfuse:w:0x$(HFUSE):m -U lfuse:w:0x$(LFUSE):m
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+# program flash and lock memory.
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+ISPFLASH = $(AVRDUDE_ROOT)avrdude $(AVRDUDE_CONF) -c $(ISPTOOL) \
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+ -p $(MCU_TARGET) -P $(ISPPORT) $(ISPSPEED) \
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+ -U flash:w:$(PROGRAM)_$(TARGET).hex -U lock:w:0x2f:m
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+
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+isp: $(PROGRAM)_$(TARGET).hex
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+ $(ISPFUSES)
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+ $(ISPFLASH)
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westfw