.. _atsame54_xpro:

SAM E54 Xplained Pro Evaluation Kit
###################################

Overview
********

The SAM E54 Xplained Pro evaluation kit is ideal for evaluation and
prototyping with the SAM E54 Cortex®-M4F processor-based
microcontrollers. The kit includes Atmel’s Embedded Debugger (EDBG),
which provides a full debug interface without the need for additional
hardware.

.. image:: img/atsame54_xpro.png
     :width: 500px
     :align: center
     :alt: ATSAME54-XPRO

Hardware
********

- ATSAME54P20A ARM Cortex-M4F processor at 120 MHz
- 32.768 kHz crystal oscillator
- 12 MHz crystal oscillator
- 1024 KiB flash memory and 256 KiB of RAM
- One yellow user LED
- One mechanical user push button
- One reset button
- On-board USB based EDBG unit with serial console
- One QTouch® PTC button
- 32 MiB QSPI Flash
- ATECC508 CryptoAuthentication™  device
- AT24MAC402 serial EEPROM with EUI-48™ MAC address
- Ethernet

   - RJ45 connector with built-in magnetics
   - KSZ8091RNA PHY
   - 10Base-T/100Base-TX IEE 802.3 compliant Ethernet transceiver

- USB interface, host, and device
- SD/SDIO card connector

Supported Features
==================

The atsame54_xpro board configuration supports the following hardware
features:

+-----------+------------+--------------------------------------+
| Interface | Controller | Driver/Component                     |
+===========+============+======================================+
| NVIC      | on-chip    | nested vector interrupt controller   |
+-----------+------------+--------------------------------------+
| SYSTICK   | on-chip    | systick                              |
+-----------+------------+--------------------------------------+
| WDT       | on-chip    | Watchdog                             |
+-----------+------------+--------------------------------------+
| GPIO      | on-chip    | I/O ports                            |
+-----------+------------+--------------------------------------+
| PWM       | on-chip    | Pulse Width Modulation               |
+-----------+------------+--------------------------------------+
| USART     | on-chip    | Serial ports                         |
+-----------+------------+--------------------------------------+
| SPI       | on-chip    | Serial Peripheral Interface ports    |
+-----------+------------+--------------------------------------+
| I2C       | on-chip    | Serial Peripheral Interface ports    |
+-----------+------------+--------------------------------------+

Other hardware features are not currently supported by Zephyr.

The default configuration can be found in the Kconfig
``boards/arm/atsame54_xpro/atsame54_xpro_defconfig``.

Pin Mapping
===========

The SAM E54 Xplained Pro evaluation kit has 4 GPIO controllers. These
controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to `SAM D5x/E5x Family Datasheet`_ and the `SAM E54
Xplained Pro Schematic`_.

.. image:: img/ATSAME54-XPRO-pinout.png
     :width: 500px
     :align: center
     :alt: ATSAME54-XPRO-pinout

Default Zephyr Peripheral Mapping:
----------------------------------
- SERCOM2 USART TX : PB24
- SERCOM2 USART RX : PB25
- GPIO/PWM LED0    : PC18
- GPIO SW0         : PB31

System Clock
============

The SAME54 MCU is configured to use the 32.768 kHz external oscillator
with the on-chip PLL generating the 48 MHz system clock.

Serial Port
===========

The SAME54 MCU has 8 SERCOM based USARTs with one configured as USARTs in
this BSP. SERCOM2 is the default Zephyr console.

- SERCOM2 115200 8n1 connected to the onboard Atmel Embedded Debugger (EDBG)

PWM
===

The SAME54 MCU has 5 TCC based PWM units with up to 6 outputs each and a period
of 24 bits or 16 bits.  If :code:`CONFIG_PWM_SAM0_TCC` is enabled then LED0 is
driven by TCC0 instead of by GPIO.

SPI Port
========

The SAME54 MCU has 8 SERCOM based SPIs.

I2C Port
========

The SAME54 MCU has 8 SERCOM based I2Cs. On the SAM E54 Xplained Pro,
SERCOM7 is connected to a AT24MAC402 EEPROM and a ATECC508A Crypto
Authentication device.

Programming and Debugging
*************************

The SAM E54 Xplained Pro comes with a Atmel Embedded Debugger (EDBG).  This
provides a debug interface to the SAME54 chip and is supported by
OpenOCD.

Flashing
========

#. Build the Zephyr kernel and the ``hello_world`` sample application:

   .. zephyr-app-commands::
      :zephyr-app: samples/hello_world
      :board: atsame54_xpro
      :goals: build
      :compact:

#. Connect the SAM E54 Xplained Pro to your host computer using the USB debug
   port.

#. Run your favorite terminal program to listen for output. Under Linux the
   terminal should be :code:`/dev/ttyACM0`. For example:

   .. code-block:: console

      $ minicom -D /dev/ttyACM0 -o

   The -o option tells minicom not to send the modem initialization
   string. Connection should be configured as follows:

   - Speed: 115200
   - Data: 8 bits
   - Parity: None
   - Stop bits: 1

#. To flash an image:

   .. zephyr-app-commands::
      :zephyr-app: samples/hello_world
      :board: atsame54_xpro
      :goals: flash
      :compact:

   You should see "Hello World! arm" in your terminal.

References
**********

.. target-notes::

.. _Microchip website:
    http://www.microchip.com/DevelopmentTools/ProductDetails.aspx?PartNO=ATSAME54-XPRO

.. _SAM D5x/E5x Family Datasheet:
    http://ww1.microchip.com/downloads/en/DeviceDoc/60001507C.pdf

.. _SAM E54 Xplained Pro Schematic:
    http://ww1.microchip.com/downloads/en/DeviceDoc/SAME54-Xplained-Pro_Design-Documentation.zip