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further Atmel - programming (2006.12.21:1 cpu#4 tech_notes#321)

Using the AVR programmer USB, stk500 V2 compatible from:

http://shop.tuxgraphics.org/electronic/microcontroller.html?id=2b93dd

(with thanks to Guido)

Further documentation online at:

http://www.tuxgraphics.org/electronics/200510/article05101.shtml

and also for avr-gcc:

http://www.tuxgraphics.org/electronics/200411/article352.shtml

notes:

• 1] Building the programmer kit - note only the reverse polarity of the firmware jumper cable
• 2] With USB cable plugged in we can see that USB Serial support/modules are loaded
• 3] from avrusb500-1.5 we run make load_test1 for testing (LED flash), and lastly make load for firmware - a lengthy operation
• 4] copying utilities such as avr-gcc, avrdude from CD-ROM:

mkdir /tmp/mnt
mount -o loop /mnt/cdrom/KNOPPIX/tgr/avr.img /tmp/mnt
cd /tmp/mnt
find avr* | cpio -dump /usr/local/
cd ; umount /tmp/mnt

# and add bin to PATH.

PATH=${PATH}:/usr/local/avr/bin/
export PATH

• 5] programmer can be used. example Makefile is included for LED flashing sample project in /code/avrm8ledtest-0.5.tar.gz - circuit as in article above.

Makefile is at:

http://main.linuxfocus.org/common/src2/article352/Makefile.html

and uses avr-gcc, avr-objcopy and prg_load_uc shell script which references:

avrdude -p m8 -c avrusb500 -e -U flash:w:"$pfile"

prg_fusebit_uc is also used to "read and write fuse bits of the atmega8"

• next up is serial communication code