Root/atusb/fw/README

1Requires a very recent toolchain, because ATmega32U2 is relatively new.
2
3- Building:
4
5  make
6
7- Uploading the firmware to a Ben (for flashing with the atusb-pgm cable):
8
9  make HOST=<hostname> upload
10
11  Example:
12
13  make HOST=ben upload
14
15  HOST defaults to "jlime".
16
17- Flashing the boot loader:
18
19  Prerequisite: avrdude on the Ben.
20
21  Disconnect the atusb board from USB. Insert the atusb-pgm connector into
22  the Ben. Place the atusb-pgm adapter on the exposed contact pads of the
23  atusb board and push it down. Then run
24
25  make prog
26
27  This takes about 30 seconds. If the programming fails with an error
28  message like "Yikes! Invalid device signature.", verify that the
29  atusb-pgm board is properly connected and placed, then try again.
30
31- Uploading the application:
32
33  Prerequisite: dfu-util installed on the PC.
34
35  Insert atusb into the PC, then run
36
37  make dfu
38
39  Note: since the boot loader resets the USB bus after timing out,
40  this operation can fail with a message like "No DFU capable USB device
41  found". Just retry, and it will eventually get through.
42
43
44HULUSB notes:
45-------------
46To prepare and flash the firmware on a HULUSB device some additional steps are
47needed;
48
49avr-objcopy -O ihex -R .signature -R .fuse -R .eeprom hulusb.elf hulusb.hex
50dfu-programmer at90usb1287 flash hulusb.hex
51dfu-programmer at90usb1287 reset
52
53--------------------------
54
55Making the toolchain:
56
57# patches according to
58# http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=789527
59
60# some gcc prerequisites
61
62apt-get remove avr-libc gcc-avr binutils-avr
63apt-get install libmpfr-dev libmpc-dev
64
65# binutils
66
67wget http://ftp.gnu.org/gnu/binutils/binutils-2.21.tar.bz2
68tar xfj binutils-2.21.tar.bz2
69cd binutils-2.21
70./configure --target=avr --disable-nls
71make
72make install
73
74# gcc
75
76wget http://ftpmirror.gnu.org/gcc/gcc-4.5.2/gcc-4.5.2.tar.bz2
77wget -O gcc_452_avr.patch http://gcc.gnu.org/bugzilla/attachment.cgi?id=23050
78tar xfj gcc-4.5.2.tar.bz2
79cd gcc-4.5.2
80patch -p1 -s <../gcc_452_avr.patch
81mkdir obj-avr
82cd obj-avr
83../configure --target=avr --enable-languages=c \
84    --disable-nls --disable-libssp --with-dwarf2
85make
86make install
87
88wget http://download.savannah.gnu.org/releases/avr-libc/avr-libc-1.7.1.tar.bz2
89tar xfj avr-libc-1.7.1.tar.bz2
90cd avr-libc-1.7.1
91./bootstrap # the automake at the end takes a while
92./configure --build=`./config.guess` --host=avr
93make
94make install
95

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