Взял другой оптибут, переделал board.txt
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atmega328bb.name=ATmega328 on a breadboard (8 MHz internal clock)
#atmega328bb.upload_port.5.board=uno
#atmega328bb.upload_port.0.board=fio
atmega328bb.upload.protocol=arduino
atmega328bb.upload.tool.default=avrdude
atmega328bb.upload.maximum_size=32256
#atmega328bb.upload.maximum_size=30720
atmega328bb.upload.speed=57600
#57600
atmega328bb.bootloader.tool.default=avrdude
atmega328bb.bootloader.low_fuses=0xE2
#atmega328bb.bootloader.low_fuses=0xA2
atmega328bb.bootloader.high_fuses=0xDE
#0xDE
atmega328bb.bootloader.extended_fuses=0xFD
atmega328bb.bootloader.file=optiboot/optiboot_atmega328_8.hex
#atmega328bb.bootloader.file=atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex
atmega328bb.bootloader.unlock_bits=0x3F
atmega328bb.bootloader.lock_bits=0x0F
atmega328bb.build.mcu=atmega328p
atmega328bb.build.f_cpu=8000000L
atmega328bb.build.core=arduino:arduino
atmega328bb.build.variant=arduino:standard
#atmega328bb.build.board=AVR_FIO
atmega328bb.bootloader.tool=arduino:avrdude
atmega328bb.upload.tool=arduino:avrdude
при загрузке выдает
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x94
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xfc
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x94
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xfc
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x94
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x8c
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x84
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x94
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x8c
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x84
Не удалась загрузка: ошибка при загрузке: exit status 1
