Atmel SAM D20 Xplained Pro

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Support for the Atmel SAM D20 Xplained Pro board.

Tip

When using this board with RIOT, set the BOARD variable to samd20-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 ?= samd20-xpro

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

include $(RIOTBASE)/Makefile.include

Support for the Atmel SAM D20 Xplained Pro board.

Overview

The SAMD20 Xplained Pro is an ultra-low power evaluation board by Atmel featuring an ATSAMD20J18 SoC. The SoC includes a SAMD20 ARM Cortex-M0+ micro- controller. For programming the MCU comes with 32Kb of RAM and 256Kb of flash memory.

Hardware

MCU

MCU	ATSAMD20J18A
Family	ARM Cortex-M0+
Vendor	Atmel
RAM	32 KiB
Flash	256 KiB
Frequency	up to 48MHz
FPU	no
Timers	8 (16-bit)
ADCs	1x 12-bit (20 channels)
UARTs	max 6 (shared with SPI and I2C)
SPIs	max 6 (see UART)
I2Cs	max 6 (see UART)
Vcc	1.62V - 3.63V
Datasheet	Datasheet
Board Manual	Board Manual

User Interface

1 User button and 1 LED:

Device	PIN
LED0	PA14
SW0 (button)	PA15

Flashing the device

Connect the device to your Micro-USB cable using the port labeled as DEBUG USB.

The standard method for flashing RIOT to the samd20-xpro is using edbg by calling:

make BOARD=samd20-xpro -C tests/leds flash

Note that on Linux, you will need libudev-dev package to be installed.

Users can also use openOCD to flash and/or debug the board using:

PROGRAMMER=openocd make BOARD=samd20-xpro -C tests/leds flash

On Linux you will have to add a udev rule for hidraw, like

echo 'KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0664", GROUP="plugdev"' \
    | sudo tee -a /etc/udev/rules.d/99-usb.rules
sudo service udev restart

Arch Linux

With yaourt:

yaourt -S libudev0
yaourt -S hidapi-git
yaourt -S openocd-git
# edit PKGBUILD, add "cmsis-dap hidapi-libusb" to "_features"

Ubuntu

Although this refers to setting up the SAMR21, this guide is still very helpful to understanding how to set up a solid RIOT development environment for the SAMD20: http://watr.li/samr21-dev-setup-ubuntu.html