Atmega256RFR2 Xplained Pro

Caution

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Tip

When using this board with RIOT, set the BOARD variable to atmega256rfr2-xpro in your Makefile. If you follow the standard RIOT project structure, your Makefile should look like this:

./Makefile

# name of your application
APPLICATION = hello-world

# Change this to your board if you want to build for a different board
BOARD ?= atmega256rfr2-xpro

# This has to be the absolute path to the RIOT base directory:
RIOTBASE ?= $(CURDIR)/RIOT

include $(RIOTBASE)/Makefile.include

Support for the Atmega256RFR2 Xplained Pro board

General information

The Atmega256RFR2 Xplained Pro is an evaluation kit by Microchip for their ATmega256RFR2 microcontroller.

Flash the board

You can flash the board using the on-board EDBG programmer via JTAG. Avrdude has support for programming an AVR via EDBG with its xplainedpro programmer.

First, make sure the default fuse settings are correct. In particular, the low byte fuse are enabling the use of the on-board 16MHz external oscillator.

WARNING: setting the fuses incorrectly can brick your board!

avrdude -p m256rfr2 -c xplainedpro -U efuse:w:0xFF:m
avrdude -p m256rfr2 -c xplainedpro -U hfuse:w:0x1F:m
avrdude -p m256rfr2 -c xplainedpro -U lfuse:w:0xFF:m

To flash the board, just call make from an application directory with the flash target:

make BOARD=atmega256rfr2-xpro -C examples/basic/hello-world flash

Accessing STDIO via UART

STDIO can be accessed through the USB connector. The on-board UART-USB adapter is not affected by flashing. It shows up as /dev/ttyACM0 on Linux. It will be used automatically with make term:

make BOARD=atmega256rfr2-xpro -C examples/basic/hello-world term