1 Requires a very recent toolchain, because ATmega32U2 is relatively new.
7 - Uploading the firmware to a Ben (for flashing with the atusb-pgm cable):
9 make HOST=<hostname> upload
15 HOST defaults to "jlime".
17 - Flashing the boot loader:
19 Prerequisite: avrdude on the Ben.
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
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.
31 - Uploading the application:
33 Prerequisite: dfu-util installed on the PC.
35 Insert atusb into the PC, then run
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.
46 To prepare and flash the firmware on a HULUSB device some additional steps are
49 avr-objcopy -O ihex -R .signature -R .fuse -R .eeprom hulusb.elf hulusb.hex
50 dfu-programmer at90usb1287 flash hulusb.hex
51 dfu-programmer at90usb1287 reset
53 --------------------------
57 # patches according to
58 # http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=789527
60 # some gcc prerequisites
62 apt-get remove avr-libc gcc-avr binutils-avr
63 apt-get install libmpfr-dev libmpc-dev
67 wget http://ftp.gnu.org/gnu/binutils/binutils-2.21.tar.bz2
68 tar xfj binutils-2.21.tar.bz2
70 ./configure --target=avr --disable-nls
76 wget http://ftpmirror.gnu.org/gcc/gcc-4.5.2/gcc-4.5.2.tar.bz2
77 wget -O gcc_452_avr.patch http://gcc.gnu.org/bugzilla/attachment.cgi?id=23050
78 tar xfj gcc-4.5.2.tar.bz2
80 patch -p1 -s <../gcc_452_avr.patch
83 ../configure --target=avr --enable-languages=c \
84 --disable-nls --disable-libssp --with-dwarf2
88 wget http://download.savannah.gnu.org/releases/avr-libc/avr-libc-1.7.1.tar.bz2
89 tar xfj avr-libc-1.7.1.tar.bz2
91 ./bootstrap # the automake at the end takes a while
92 ./configure --build=`./config.guess` --host=avr