Arduino with ATmega168P

秋月でATmega168Pが300円で売り出し始めて話題になっておりますが、実はArduinoに使われているのは”P”がつかないATmega168で、そのせいでブートローダが焼けなかった!
というわけで調べたら情報がいくつか出てきますが、以下やってみた情報を。環境はMac OS X 10.5, ライターはSTK500。

基本的には
http://www.geocities.jp/arduino_diecimila/bootloader/index.html#mega8_328
ここの情報を参考にさせていただきました。

●avrdudeのデバイス定義ファイルに、ATmega168Pの定義を追加。
CrossPack AVR や Arduino に含まれているavr-dudeのデバイス定義が古い。というわけで
ターミナル上からavr-dude、またはAVRFuses等のGUIラッパを使う場合:

/usr/local/CrossPack-AVR/etc/avrdude.conf

Arduino IDEから書き込む場合:

/Applications/arduino-0016/hardware/tools/avr/etc/avrdude.conf

に、上記サイトのavrdude.confのおしりに追加された定義ファイル部分をコピペ。抜き出すと、


#------------------------------------------------------------
# ATmega168P
#------------------------------------------------------------

part
id = "m168p";
desc = "ATMEGA168P";
has_debugwire = yes;
flash_instr = 0xB6, 0x01, 0x11;
eeprom_instr = 0xBD, 0xF2, 0xBD, 0xE1, 0xBB, 0xCF, 0xB4, 0x00,
0xBE, 0x01, 0xB6, 0x01, 0xBC, 0x00, 0xBB, 0xBF,
0x99, 0xF9, 0xBB, 0xAF;
stk500_devcode = 0x86;
# avr910_devcode = 0x;
signature = 0x1e 0x94 0x0B;
pagel = 0xd7;
bs2 = 0xc2;
chip_erase_delay = 9000;
pgm_enable = "1 0 1 0 1 1 0 0 0 1 0 1 0 0 1 1",
"x x x x x x x x x x x x x x x x";

chip_erase = "1 0 1 0 1 1 0 0 1 0 0 0 0 0 0 0",
"x x x x x x x x x x x x x x x x";

timeout = 200;
stabdelay = 100;
cmdexedelay = 25;
synchloops = 32;
bytedelay = 0;
pollindex = 3;
pollvalue = 0x53;
predelay = 1;
postdelay = 1;
pollmethod = 1;

pp_controlstack =
0x0E, 0x1E, 0x0F, 0x1F, 0x2E, 0x3E, 0x2F, 0x3F,
0x4E, 0x5E, 0x4F, 0x5F, 0x6E, 0x7E, 0x6F, 0x7F,
0x66, 0x76, 0x67, 0x77, 0x6A, 0x7A, 0x6B, 0x7B,
0xBE, 0xFD, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00;
hventerstabdelay = 100;
progmodedelay = 0;
latchcycles = 5;
togglevtg = 1;
poweroffdelay = 15;
resetdelayms = 1;
resetdelayus = 0;
hvleavestabdelay = 15;
resetdelay = 15;
chiperasepulsewidth = 0;
chiperasepolltimeout = 10;
programfusepulsewidth = 0;
programfusepolltimeout = 5;
programlockpulsewidth = 0;
programlockpolltimeout = 5;

memory "eeprom"
paged = no;
page_size = 4;
size = 512;
min_write_delay = 3600;
max_write_delay = 3600;
readback_p1 = 0xff;
readback_p2 = 0xff;
read = " 1 0 1 0 0 0 0 0",
" 0 0 0 x x x x a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" o o o o o o o o";

write = " 1 1 0 0 0 0 0 0",
" 0 0 0 x x x x a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" i i i i i i i i";

loadpage_lo = " 1 1 0 0 0 0 0 1",
" 0 0 0 0 0 0 0 0",
" 0 0 0 0 0 0 a1 a0",
" i i i i i i i i";

writepage = " 1 1 0 0 0 0 1 0",
" 0 0 x x x x x a8",
" a7 a6 a5 a4 a3 a2 0 0",
" x x x x x x x x";

mode = 0x41;
delay = 5;
blocksize = 4;
readsize = 256;
;

memory "flash"
paged = yes;
size = 16384;
page_size = 128;
num_pages = 128;
min_write_delay = 4500;
max_write_delay = 4500;
readback_p1 = 0xff;
readback_p2 = 0xff;
read_lo = " 0 0 1 0 0 0 0 0",
" 0 0 0 a12 a11 a10 a9 a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" o o o o o o o o";

read_hi = " 0 0 1 0 1 0 0 0",
" 0 0 0 a12 a11 a10 a9 a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" o o o o o o o o";

loadpage_lo = " 0 1 0 0 0 0 0 0",
" 0 0 0 x x x x x",
" x x a5 a4 a3 a2 a1 a0",
" i i i i i i i i";

loadpage_hi = " 0 1 0 0 1 0 0 0",
" 0 0 0 x x x x x",
" x x a5 a4 a3 a2 a1 a0",
" i i i i i i i i";

writepage = " 0 1 0 0 1 1 0 0",
" 0 0 0 a12 a11 a10 a9 a8",
" a7 a6 a5 x x x x x",
" x x x x x x x x";

mode = 0x41;
delay = 6;
blocksize = 128;
readsize = 256;

;

memory "lfuse"
size = 1;
min_write_delay = 4500;
max_write_delay = 4500;
read = "0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0",
"x x x x x x x x o o o o o o o o";

write = "1 0 1 0 1 1 0 0 1 0 1 0 0 0 0 0",
"x x x x x x x x i i i i i i i i";
;

memory "hfuse"
size = 1;
min_write_delay = 4500;
max_write_delay = 4500;
read = "0 1 0 1 1 0 0 0 0 0 0 0 1 0 0 0",
"x x x x x x x x o o o o o o o o";

write = "1 0 1 0 1 1 0 0 1 0 1 0 1 0 0 0",
"x x x x x x x x i i i i i i i i";
;

memory "efuse"
size = 1;
min_write_delay = 4500;
max_write_delay = 4500;
read = "0 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0",
"x x x x x x x x x x x x x x x o";

write = "1 0 1 0 1 1 0 0 1 0 1 0 0 1 0 0",
"x x x x x x x x x x x x x x x i";
;

memory "lock"
size = 1;
min_write_delay = 4500;
max_write_delay = 4500;
read = "0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0",
"x x x x x x x x x x o o o o o o";

write = "1 0 1 0 1 1 0 0 1 1 1 x x x x x",
"x x x x x x x x 1 1 i i i i i i";
;

memory "calibration"
size = 1;
read = "0 0 1 1 1 0 0 0 0 0 0 x x x x x",
"0 0 0 0 0 0 0 0 o o o o o o o o";
;

memory "signature"
size = 3;
read = "0 0 1 1 0 0 0 0 0 0 0 x x x x x",
"x x x x x x a1 a0 o o o o o o o o";
;
;

●Arduino IDEのボード定義にATmega168Pを使ったボードを追加
Arduino IDE の “Burn Bootloader” から書き込む場合は、

/Applications/arduino-0016/hardware/boards.txt

に、MCUはATmega168P、そのほかはATmega168と全く同じ、というボードの情報を追加。

##############################################################

diecimila168P.name=Arduino Diecimila or Duemilanove w/ ATmega168P

diecimila168P.upload.protocol=stk500
diecimila168P.upload.maximum_size=14336
diecimila168P.upload.speed=19200

diecimila168P.bootloader.low_fuses=0xff
diecimila168P.bootloader.high_fuses=0xdd
diecimila168P.bootloader.extended_fuses=0x00
diecimila168P.bootloader.path=atmega
diecimila168P.bootloader.file=ATmegaBOOT_168_diecimila.hex
diecimila168P.bootloader.unlock_bits=0x3F
diecimila168P.bootloader.lock_bits=0x0F

diecimila168P.build.mcu=atmega168p
diecimila168P.build.f_cpu=16000000L
diecimila168P.build.core=arduino

これでブートローダが書き込めます。SKT500を使う場合は

/Applications/arduino-0016/hardware/programmers.txt

に、以下の記述を加えるとSTK500から書き込めます。

-----------------------------
stk500.name=STK500
stk500.communication=serial
stk500.protocol=stk500v2