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# Name: Makefile
# Project: Micronucleus
# License: GNU GPL v2 (see License.txt)
#
# Controller type: ATtiny 841
# Configuration: Default configuration - 12 Mhz RC oscillator
# Last Change: Mar 16,2014
F_CPU = 12000000
DEVICE = attiny841
# hexadecimal address for bootloader section to begin. To calculate the best value:
# - make clean; make main.hex; ### output will list data: 2124 (or something like that)
# - for the size of your device (8kb = 1024 * 8 = 8192) subtract above value 2124... = 6068
# - How many pages in is that? 6068 / 64 (tiny85 page size in bytes) = 94.8125
# - round that down to 94 - our new bootloader address is 94 * 64 = 6016, in hex = 1780
BOOTLOADER_ADDRESS = 19C0
FUSEOPT = -U lfuse:w:0xe2:m -U hfuse:w:0xdd:m -U efuse:w:0xfe:m
FUSEOPT_DISABLERESET = # TODO
#---------------------------------------------------------------------
# ATtiny841
#---------------------------------------------------------------------
# Fuse extended byte:
# 0xFE = 1 1 1 1 1 1 1 0
# ^
# |
# +---- SELFPRGEN (enable self programming flash)
#
# Fuse high byte:
# 0xdd = 1 1 0 1 1 1 0 1
# ^ ^ ^ ^ ^ \-+-/
# | | | | | +------ BODLEVEL 2..0 (brownout trigger level -> 2.7V)
# | | | | +---------- EESAVE (preserve EEPROM on Chip Erase -> not preserved)
# | | | +-------------- WDTON (watchdog timer always on -> disable)
# | | +---------------- SPIEN (enable serial programming -> enabled)
# | +------------------ DWEN (debug wire enable)
# +-------------------- RSTDISBL (disable external reset -> enabled)
#
# Fuse high byte ("no reset": external reset disabled, can't program through SPI anymore)
# 0x5d = 0 1 0 1 1 1 0 1
# ^ ^ ^ ^ ^ \-+-/
# | | | | | +------ BODLEVEL 2..0 (brownout trigger level -> 2.7V)
# | | | | +---------- EESAVE (preserve EEPROM on Chip Erase -> not preserved)
# | | | +-------------- WDTON (watchdog timer always on -> disable)
# | | +---------------- SPIEN (enable serial programming -> enabled)
# | +------------------ DWEN (debug wire enable)
# +-------------------- RSTDISBL (disable external reset -> disabled!)
#
# Fuse low byte:
# 0xe2 = 1 1 1 0 0 0 1 0
# ^ ^ \+/ \--+--/
# | | | +------- CKSEL 3..0 (clock selection -> RC Oscillator)
# | | +--------------- SUT 1..0 (BOD enabled, fast rising power)
# | +------------------ CKOUT (clock output on CKOUT pin -> disabled)
# +-------------------- CKDIV8 (divide clock by 8 -> don't divide)
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