.. zephyr:board:: efm32tg_stk3300

Overview

The EFM32 Tiny Gecko Starter Kit EFM32TG-STK3300 contains a MCU from the EFM32TG family built on ARM® Cortex®-M3 processor with excellent low power capabilities.

Hardware

EFM32TG840F32 MCU with 32 kB flash and 4 kB RAM
Advanced Energy Monitoring provides real-time information about the energy consumption of an application or prototype design.
160 segment Energy Micro LCD
2 user buttons, 1 LED and a touch slider
Ambient Light Sensor, Inductive-capacitive metal sensor and touch sensor
On-board Segger J-Link USB debugger

For more information about the EFM32TG SoC and EFM32TG-STK3300 board:

EFM32TG Website_
EFM32TG Datasheet_
EFM32TG Reference Manual_
EFM32TG-STK3300 Website_
EFM32TG-STK3300 User Guide_
EFM32TG-STK3300 Schematics_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

The EFM32TG SoC has six gpio controllers (PORTA to PORTF), but only three are currently enabled (PORTB, PORTC and PORTD) for the EFM32TG-STK3300 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 | +======+===========+=======================================+ | PD7 | GPIO | LED0 | +------+-----------+---------------------------------------+ | PD8 | GPIO | Push Button PB0 | +------+-----------+---------------------------------------+ | PB11 | GPIO | Push Button PB1 | +------+-----------+---------------------------------------+ | PD0 | USART1_TX | UART Console USART1_TX #1 (EXP Pin 4) | +------+-----------+---------------------------------------+ | PD1 | USART1_RX | UART Console USART1_RX #1 (EXP Pin 6) | +------+-----------+---------------------------------------+

System Clock

The EFM32TG SoC is configured to use the 32 MHz external oscillator on the board.

Serial Port

The EFM32TG SoC has two USARTs and one Low Energy UART (LEUART). USART1 is used for the console. It is exposed to the EXP Header on the board (TX: Pin 4, RX: Pin 6).

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 or with JLinkConfig.

Flashing

The EFM32TG-STK3300 includes an J-Link_ debug adaptor built into the board. It is used to flash and debug the EFM32TG on the board.

Flashing an application to EFM32-STK3300

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: efm32tg_stk3300 :goals: build

Connect the EFM32TG-STK3300 to your host computer using the USB port. Flash the device:

.. code-block:: console

west flash

Connect the board with Use a Serial-to-USB cable to connect the host computer with the board. The serial port is exposed on the EXP Header (TX: Pin 4, RX: Pin 6).

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! efm32tg_stk3300/efm32tg840f32

.. _EFM32TG-STK3300 Website: https://www.silabs.com/products/development-tools/mcu/32-bit/efm32-tiny-gecko-starter-kit

.. _EFM32TG-STK3300 User Guide: https://www.silabs.com/documents/public/user-guides/ug420-efm32tg-stk3300.pdf

.. _EFM32TG-STK3300 Schematics: https://www.silabs.com/documents/public/schematic-files/BRD2100A-A04-schematic.pdf

.. _EFM32TG Website: https://www.silabs.com/products/mcu/32-bit/efm32-tiny-gecko

.. _EFM32TG Datasheet: https://www.silabs.com/documents/public/data-sheets/EFM32TG840.pdf

.. _EFM32TG Reference Manual: https://www.silabs.com/documents/public/reference-manuals/EFM32TG-RM.pdf

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