Mega1284P-Xplained

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Support for the Mega1284P-Xplained board.

Tip

When using this board with RIOT, set the BOARD variable to mega-xplained 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 ?= mega-xplained

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

include $(RIOTBASE)/Makefile.include

Support for the Mega1284P-Xplained board.

General information

The Mega1284P-Xplained is an evaluation kit by Atmel (now Microchip) for their ATmega1284P microcontroller.

Flash the board

You can change the fuses and flash the board using an SPI ISP programmer such as the Bus Pirate, or using a JTAG programmer such as the Atmel-ICE with a JTAG adapter.

If using the Atmel-ICE as a JTAG programmer, connect the adapter with the square pin on the adapter connecting with the square pin on the board.

1. First, make sure the default fuse settings are correct.
   

   WARNING: setting the fuses incorrectly can brick your board!

   If using the Buspirate:

   avrdude -p m1284p -c buspirate -P /dev/ttyUSB0 -U efuse:w:0xFF:m
   avrdude -p m1284p -c buspirate -P /dev/ttyUSB0 -U hfuse:w:0x99:m
   avrdude -p m1284p -c buspirate -P /dev/ttyUSB0 -U lfuse:w:0xE2:m

   If using the Atmel-ICE:

   avrdude -p m1284p -c atmelice -U efuse:w:0xFF:m
   avrdude -p m1284p -c atmelice -U hfuse:w:0x99:m
   avrdude -p m1284p -c atmelice -U lfuse:w:0xE2:m

2. After the fuses are set, flash the application.

   If using the Buspirate:

   BOARD=mega-xplained make -C examples/basic/hello-world flash

   If using the Atmel-ICE:

   BOARD=mega-xplained PROGRAMMER=atmelice make -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:

BOARD=mega-xplained make -C examples/basic/hello-world term

Pin Change Interrupts

More pins can be used for hardware interrupts using the Pin Change Interrupt feature. See boards_common_atmega for details.