# 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 = 1980

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)