.. zephyr:board:: slstk3400a

Overview

The EFM32 Happy Gecko Starter Kit SLSTK3400A contains a MCU from the EFM32HG family built on ARM® Cortex®-M0+ processor with excellent low power capabilities.

Hardware

Advanced Energy Monitoring system for precise current tracking
Real-time energy and power profiling
ARM Cortex M0+ with 64 kB Flash and 8 kB RAM
128 X 128 pixel Memory LCD
2 user buttons, 2 user LEDs and 2 touch buttons
20 pin expansion header
Silicon Labs Si7021 Relative Humidity/Temperature sensor
USB device interface
Integrated SEGGER J-Link USB debugger/emulator with debug out functionality

See these documents for more information

EFM32HG Website_
EFM32HG Datasheet_
EFM32HG Reference Manual_
SLSTK3400A Website_
SLSTK3400A User Guide_
SLSTK3400A Schematics_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

The EFM32HG SoC has six GPIO controllers (PORTA to PORTF), but only three are currently enabled (PORTB, PORTE and PORTF) for the SLSTK3400A board.

In the following table, the column Name contains Pin names. For example, PF4 means Pin number 4 on PORTF, as used in the board's datasheets and manuals.

+-------+-------------+-------------------------------------+ | Name | Function | Usage | +=======+=============+=====================================+ | PF4 | GPIO | LED0 | +-------+-------------+-------------------------------------+ | PF5 | GPIO | LED1 | +-------+-------------+-------------------------------------+ | PC9 | GPIO | Push Button PB0 | +-------+-------------+-------------------------------------+ | PC10 | GPIO | Push Button PB1 | +-------+-------------+-------------------------------------+ | PF7 | GPIO | Board Controller Enable | | | | EFM_BC_EN | +-------+-------------+-------------------------------------+ | PF2 | USART0_TX | USART Console EFM_BC_TX U0_TX #4 | +-------+-------------+-------------------------------------+ | PA9 | USART0_RX | USART Console EFM_BC_RX U0_RX #4 | +-------+-------------+-------------------------------------+

System Clock

The EFM32HG SoC is configured to use the 24 MHz external oscillator on the board.

Serial Port

The EFM32HG SoC has two USARTs, two UARTs and two Low Energy UARTs (LEUART). USART1 is connected to the board controller and is used for the console.

Programming and Debugging

.. zephyr:board-supported-runners::

.. note:: Before using the kit the first time, you should update the J-Link firmware in Simplicity Studio.

Flashing

The SLSTK3400 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-SLSTK3400A

The sample application :zephyr:code-sample:hello_world is used for this example. Build the Zephyr kernel and application:

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: slstk3400a :goals: build

Connect the SLSTK3400A to your host computer using the USB port and you should see a USB connection that exposes a mass storage device (STK3400) and a USB Serial Port. Copy the generated zephyr.bin in the STK3400 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 will see this message written to the serial port:

.. code-block:: console

Hello World! slstk3400a

.. _SLSTK3400A Website: https://www.silabs.com/products/development-tools/mcu/32-bit/efm32-happy-gecko-starter-kit

.. _SLSTK3400A User Guide: https://www.silabs.com/documents/public/user-guides/ug255-stk3400-user-guide.pdf

.. _SLSTK3400A Schematics: https://www.silabs.com/documents/public/schematic-files/BRD2012A-B01-schematic.pdf

.. _EFM32HG Website: https://www.silabs.com/products/mcu/32-bit/efm32-happy-gecko

.. _EFM32HG Datasheet: https://www.silabs.com/documents/public/data-sheets/EFM32HG322.pdf

.. _EFM32HG Reference Manual: https://www.silabs.com/documents/public/reference-manuals/EFM32HG-RM.pdf

.. _J-Link: https://www.segger.com/jlink-debug-probes.html