MT-DB-U4
User Guide
Fuse and Lock Settings
Fuse and Lock Settings
The bootloaders were preinstalled with the following commands (ATmega32u4 CDC bootloader
shown):
avrdude p m32u4 c avrisp2 P usb e
avrdude p m32u4 c avrisp2 P usb U lfuse:w:0x7f:m U hfuse:w:0x98:m U efuse:w:0xcb:m
avrdude p m32u4 c avrisp2 P usb B 4 U flash:w:"Bootloader.hex"
The Bitlash program was preinstalled with the following command ( ATmega32u4 CDC bootloader
shown):
avrdude p m32u4 c avr109 P /dev/ttyACM0 U flash:w:"bitlashdemo_MTDBU4.hex"
The lockbits are not set with the CDC bootloader. They ARE set with the Atmel DFU bootloader.
Troubleshooting / FAQ
Troubleshooting / FAQ
●
The board may have either the TQFP or the QFN chip package installed (usually the TQFP).
Additionally, on rare occasions, the RC variant will be installed. If so, the fuses will be changed
such that the chip is exactly the same as the nonRC variant.
●
The solder jumper J1 can become unsoldered when attaching headers.
Support Information
Support Information
Please check the MattairTech website (
http://www.MattairTech.com/
) for firmware and software
updates. Email me if you have any feature requests, suggestions, or if you have found a bug. If you
need support, please contact me (email is best). You can also find support information at the
MattairTech website. A support forum is planned. Support for AVRs in general can be found at
AVRfreaks (
http://www.avrfreaks.net/
). There, I monitor the forums section as the user physicist.
Justin Mattair
MattairTech LLC
PO Box 1079
Heppner, OR 97836 USA
541-626-1531
[email protected]
http://www.mattairtech.com/
Acknowledgments
Thanks to Dean Camera (
http://www.fourwalledcubicle.com/
) for his excellent LUFA library,
CDC bootloader, DFU bootloader, and AVRISP mkII clone programmer. Thanks to the members of
AVRfreaks (
http://www.avrfreaks.net/
) for their support. Finally, thanks to Atmel for creating a great
product, the AVR microcontroller.
December 30, 2015
35
http://www.mattairtech.com/
