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.. _efm32wg_stk3800:
EFM32WG-STK3800
###############
Overview
********
The EFM32 Wonder Gecko Starter Kit EFM32WG-STK3800 contains a MCU from the
EFM32WG family built on ARM® Cortex®-M4F processor with excellent low
power capabilities.
.. figure:: efm32wg_stk3800.jpg
:align: center
:alt: EFM32WG-STK3800
EFM32WG-STK3800 (image courtesy of Silicon Labs)
Hardware
********
- Advanced Energy Monitoring provides real-time information about the energy
consumption of an application or prototype design.
- 32MByte parallel NAND Flash
- 160 segment Energy Micro LCD
- 2 user buttons, 2 LEDs and a touch slider
- Ambient Light Sensor and Inductive-capacitive metal sensor
- On-board Segger J-Link USB debugger
For more information about the EFM32WG SoC and EFM32WG-STK3800 board:
- `EFM32WG Website`_
- `EFM32WG Datasheet`_
- `EFM32WG Reference Manual`_
- `EFM32WG-STK3800 Website`_
- `EFM32WG-STK3800 User Guide`_
- `EFM32WG-STK3800 Schematics`_
Supported Features
==================
The efm32wg_stk3800 board configuration supports the following hardware features:
+-----------+------------+-------------------------------------+
| Interface | Controller | Driver/Component |
+===========+============+=====================================+
| MPU | on-chip | memory protection unit |
+-----------+------------+-------------------------------------+
| NVIC | on-chip | nested vector interrupt controller |
+-----------+------------+-------------------------------------+
| SYSTICK | on-chip | systick |
+-----------+------------+-------------------------------------+
| FLASH | on-chip | flash memory |
+-----------+------------+-------------------------------------+
| GPIO | on-chip | gpio |
+-----------+------------+-------------------------------------+
| UART | on-chip | serial port-polling; |
| | | serial port-interrupt |
+-----------+------------+-------------------------------------+
The default configuration can be found in the defconfig file:
``boards/arm/efm32wg_stk3800/efm32wg_stk3800_defconfig``
Other hardware features are currently not supported by the port.
Connections and IOs
===================
The EFM32WG SoC has six gpio controllers (PORTA to PORTF), but only three are
currently enabled (PORTB, PORTE and PORTF) for the EFM32WG-STK3800 board.
In the following table, the column Name contains Pin names. For example, PE2
means Pin number 2 on PORTE, as used in the board's datasheets and manuals.
+-------+-------------+-------------------------------------+
| Name | Function | Usage |
+=======+=============+=====================================+
| PE2 | GPIO | LED0 |
+-------+-------------+-------------------------------------+
| PE3 | GPIO | LED1 |
+-------+-------------+-------------------------------------+
| PB9 | GPIO | Push Button PB0 |
+-------+-------------+-------------------------------------+
| PB10 | GPIO | Push Button PB1 |
+-------+-------------+-------------------------------------+
| PF7 | GPIO | Board Controller Enable |
| | | EFM_BC_EN |
+-------+-------------+-------------------------------------+
| PE0 | UART0_TX | UART Console EFM_BC_TX U0_TX #1 |
+-------+-------------+-------------------------------------+
| PE1 | UART0_RX | UART Console EFM_BC_RX U0_RX #1 |
+-------+-------------+-------------------------------------+
System Clock
============
The EFM32WG SoC is configured to use the 48 MHz external oscillator on the
board.
Serial Port
===========
The EFM32WG SoC has three USARTs, two UARTs and two Low Energy UARTs (LEUART).
UART0 is connected to the board controller and is used for the console.
Programming and Debugging
*************************
.. note::
Before using the kit the first time, you should update the J-Link firmware
from `J-Link-Downloads`_
Flashing
========
The EFM32WG-STK3800 includes an `J-Link`_ serial and debug adaptor built into the
board. The adaptor provides:
- A USB connection to the host computer, which exposes a Mass Storage and a
USB Serial Port.
- A Serial Flash device, which implements the USB flash disk file storage.
- A physical UART connection which is relayed over interface USB Serial port.
Flashing an application to EFM32-STK3800
----------------------------------------
The sample application :ref:`hello_world` is used for this example.
Build the Zephyr kernel and application:
.. zephyr-app-commands::
:zephyr-app: samples/hello_world
:board: efm32wg_stk3800
:goals: build
Connect the EFM32WG-STK3800 to your host computer using the USB port and you
should see a USB connection which exposes a Mass Storage (STK3800) and a
USB Serial Port. Copy the generated zephyr.bin in the STK3800 drive.
Open a serial terminal (minicom, putty, etc.) with the following settings:
- Speed: 115200
- Data: 8 bits
- Parity: None
- Stop bits: 1
Reset the board and you should be able to see on the corresponding Serial Port
the following message:
.. code-block:: console
Hello World! arm
.. _EFM32WG-STK3800 Website:
http://www.silabs.com/products/development-tools/mcu/32-bit/efm32-wonder-gecko-starter-kit
.. _EFM32WG-STK3800 User Guide:
http://www.silabs.com/documents/public/user-guides/efm32wg-stk3800-ug.pdf
.. _EFM32WG-STK3800 Schematics:
http://www.silabs.com/documents/public/schematic-files/BRD2400A_A00.pdf
.. _EFM32WG Website:
http://www.silabs.com/products/mcu/32-bit/efm32-wonder-gecko
.. _EFM32WG Datasheet:
http://www.silabs.com/documents/public/data-sheets/EFM32WG990.pdf
.. _EFM32WG Reference Manual:
http://www.silabs.com/documents/public/reference-manuals/EFM32WG-RM.pdf
.. _J-Link:
https://www.segger.com/jlink-debug-probes.html
.. _J-Link-Downloads:
https://www.segger.com/downloads/jlink