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--------------------------
44
45Making the toolchain:
46
47# patches according to
48# http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=789527
49
50# some gcc prerequisites
51
52apt-get remove avr-libc gcc-avr binutils-avr
53apt-get install libmpfr-dev libmpc-dev
54
55# binutils
56
57wget http://ftp.gnu.org/gnu/binutils/binutils-2.21.tar.bz2
58tar xfj binutils-2.21.tar.bz2
59cd binutils-2.21
60./configure --target=avr --disable-nls
61make
62make install
63
64# gcc
65
66wget http://ftpmirror.gnu.org/gcc/gcc-4.5.2/gcc-4.5.2.tar.bz2
67wget -O gcc_452_avr.patch http://gcc.gnu.org/bugzilla/attachment.cgi?id=23050
68tar xfj gcc-4.5.2.tar.bz2
69cd gcc-4.5.2
70patch -p1 -s <../gcc_452_avr.patch
71mkdir obj-avr
72cd obj-avr
73../configure --target=avr --enable-languages=c \
74    --disable-nls --disable-libssp --with-dwarf2
75make
76make install
77
78wget http://download.savannah.gnu.org/releases/avr-libc/avr-libc-1.7.1.tar.bz2
79tar xfj avr-libc-1.7.1.tar.bz2
80cd avr-libc-1.7.1
81./bootstrap # the automake at the end takes a while
82./configure --build=`./config.guess` --host=avr
83make
84make install
85

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