Hi,
I built a barebones board which I want to program using an FTDI cable in the Arduino environment. When I try to upload programs the IDE fives a sync error message. Is that due to the 8MHz crystal ? Do I need to change some settings somewhere to take account of the different crystal ?
I had a look on playground and there was an article which said change preference.txt, but I couldn't find the crystal freq in that file.
Thanks
What board do you have selected under Tools->Boards? You should select an 8 MHz board. If none of the existing 8 MHz boards matches your breadboard you should write your own boards.txt file to add your breadboard. Maybe something like this but with setting for a crystal:
##############################################################
atmega328bb.name=ATmega328 on a breadboard (8 MHz internal clock)
atmega328bb.upload.protocol=stk500
atmega328bb.upload.maximum_size=30720
atmega328bb.upload.speed=57600
atmega328bb.bootloader.low_fuses=0xE2
atmega328bb.bootloader.high_fuses=0xD9
atmega328bb.bootloader.extended_fuses=0x07
atmega328bb.bootloader.path=arduino:atmega
atmega328bb.bootloader.file=ATmegaBOOT_168_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
Hi,
I'm using atmega328PU with a 8MHz crystal. IDE Arduino 0022 and none of the boards on list match. I'll try a custom board definition as you suggest.
Many Thanks
Hi, I had a stab at doing a custom board in boards.txt.
Although My board has an external crystal I decided to try (for now) 8MHz internal clock. I used ADABoot (I think it uses internal clock 8MHz - but this could be wrong)
I have set the fuses for 8MHz internal clock using AVRstudio 4. I then tried this board in boards .txt
I put the ADABoot_328 HEX file in the file path: /atmega328.bootloader.path=atmega. I used a low baud rate for safety (9600). Set Baud for cable at 9600 also.
##############################################################
atmega328x.name=Arduino Xino w/ATmega328-PU 8MHz internal clock
atmega328x.upload.protocol=stk500
atmega328x.upload.maximum_size=30720
atmega328x.upload.speed=9600
atmega328x.bootloader.low_fuses=0xFF
atmega328x.bootloader.high_fuses=0xDA
atmega328x.bootloader.extended_fuses=0x05
atmega328x.bootloader.path=atmega
atmega328x.bootloader.file=ADABoot_328
atmega328x.bootloader.unlock_bits=0x3F
atmega328x.bootloader.lock_bits=0x0F
atmega328x.build.mcu=atmega328p
atmega328x.build.f_cpu=8000000L
atmega328x.build.core=arduino
##############################################################
It still doesn't work with cable. Still getting sync error in IDE.
"avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51"
Am I on the right track?
Thanks
johnwasser:
What board do you have selected under Tools->Boards? You should select an 8 MHz board. If none of the existing 8 MHz boards matches your breadboard you should write your own boards.txt file to add your breadboard. Maybe something like this but with setting for a crystal:##############################################################
atmega328bb.name=ATmega328 on a breadboard (8 MHz internal clock)
atmega328bb.upload.protocol=stk500
atmega328bb.upload.maximum_size=30720
atmega328bb.upload.speed=57600atmega328bb.bootloader.low_fuses=0xE2
atmega328bb.bootloader.high_fuses=0xD9
atmega328bb.bootloader.extended_fuses=0x07
atmega328bb.bootloader.path=arduino:atmega
atmega328bb.bootloader.file=ATmegaBOOT_168_pro_8MHz.hex
atmega328bb.bootloader.unlock_bits=0x3F
atmega328bb.bootloader.lock_bits=0x0Fatmega328bb.build.mcu=atmega328p
atmega328bb.build.f_cpu=8000000L
atmega328bb.build.core=arduino:arduino
copy this in your boards.txt file and you'll have the new board in the board menù
hi nk
Did you burn the bootloader?
I've been using the attached 8MHz version of Optiboot. I modified the boards.txt entry for the 8MHz Pro Mini as follows. Also see similar thread here.
pro328.name=Arduino Pro or Pro Mini (3.3V, 8 MHz) w/ ATmega328
pro328.upload.protocol=stk500
pro328.upload.maximum_size=32256
pro328.upload.speed=57600
pro328.bootloader.low_fuses=0xFF
pro328.bootloader.high_fuses=0xDE
pro328.bootloader.extended_fuses=0x05
pro328.bootloader.path=optiboot
pro328.bootloader.file=optiboot_atmega328_pro_8MHz.hex
#pro328.bootloader.path=atmega
#pro328.bootloader.file=ATmegaBOOT_168_atmega328_pro_8MHz.hex
pro328.bootloader.unlock_bits=0x3F
pro328.bootloader.lock_bits=0x0F
pro328.build.mcu=atmega328p
pro328.build.f_cpu=8000000L
pro328.build.core=arduino
optiboot_atmega328_pro_8MHz.hex (1.43 KB)
Many thanks to all for the input. The following board settings worked with the bootloader suggested by Jack.
http://proto-pic.co.uk/xino-basic-for-the-atmel-atmega-series-and-arduino/
xino328.name=Arduino xino (3.3V, 8 MHz) w/ ATmega328
xino328.upload.protocol=stk500
xino328.upload.maximum_size=32256
xino328.upload.speed=57600
xino328.bootloader.low_fuses=0xFF
xino28.bootloader.high_fuses=0xDE
xino328.bootloader.extended_fuses=0x05
xino328.bootloader.path=optiboot
pro328.bootloader.file=optiboot_atmega328_pro_8MHz.hex
xino328.bootloader.path=atmega
xino328.bootloader.file=ATmegaBOOT_168_atmega328_pro_8MHz.hex
xino328.bootloader.unlock_bits=0x3F
xino328.bootloader.lock_bits=0x0F
xino328.build.mcu=atmega328p
xino328.build.f_cpu=8000000L
xino328.build.core=arduino
cheers
