MY PROJECTS

robotics - electronics - machining

Projects

• Main HomePage
• USBTiny MKii Programmer
• USBTiny MKii User Guide
• Atmega32U2 Breakout Board
• Toaster Oven
• Flash Chip Hack
• Mini ITX
• Misc. Boards
• Datalogger
• Etch Tank
• USB Tiny Programmer
• Using USB Tiny
• Making USB Tiny
• Project Boards
• Intel Atom PC

Atmega AVR

• How To Series
• C Bit Manipulation
• AVR Info

CNC Related

• Linuxcnc MESA Bitfiles Xilinx-14.5
• Linuxcnc MESA Bitfiles Xilinx-9.2
• Sherline CNC
• CNC Power Supply
• New Spindle Pulleys
• CNC Touch Probe
• Local Metal Surplus

Dean Camera's Articles

• Avr Timers
• Avr Interrupts
• EEprom Basics
• PROGMEM Basics
• Programming Methods
• USART Basics
• USART Interrupts

Older projects

• Maxbot
• MiniSumo
• Large Bot
• lightSeeker
• Miscellaneous
• Motors N Stuff

Other Links

• Making PC Boards
• Robotic Sites

Other Stuff

• Binocular Scope
• Patio Project
• Sprayer Project
• Door Monitor
• Death Road

USB Breakout

New USB Breakout boards available in limited quantity.

Description

The USB Breakout board as the name indicates is a DIP breakout board for the Atmel ATMEGA32U2 USB chips that are not available in DIP form. It simplifies developement of USB code and devices for this chip.

• Microcontroller option: ATMega32U2
• Switch selectable power from USB-VBUS or breadboard
• One button program option (Remove R4 if not desired)
• Accessible USB D+, D- lines
• Preprogrammed Atmel bootloader
• Use Atmel's FLIP or DFU Programmer to load programs over the USB Port
• Compatible with LUFA
• Compatible with PSGroove

avr-libc bug

Older device definition files may cause a compilation error when building LUFA projects for the Atmega32U2. You will get an error about clock_div_1 not being set and missing clock_prescale_set

To correct this, edit avr/include/avr/power.h by hand. Insert the following line:

|| defined(__AVR_ATmega32U2__) \

into power.h. Look for a long list of similar definitions around line 1300 of the file. The two missing symbols will now be defined and Atmega32U2 projects will compile. Thanks to Dean Camera for this solution.

DFU-programmer bug

DFU-programmer is a free alternative to Atmel's Flip tool. Unfortunately, there is no support in it for atmega32u2 in the current binary release of this tool. However, there is support in the latest SVN version. Hopefully DFU programmer will be updated soon.

$ svn co https://dfu-programmer.svn.sourceforge.net/svnroot/dfu-programmer/trunk/ dfu-programmer
$ cd dfu-programmer/dfu-programmer
$ ./bootstrap.sh
$ ./configure
$ make


Thanks to The Portland Dorkbots for this solution.