.. zephyr:board:: slwrb4255a

Overview

The EFR32FG13P Flex Gecko 2.4 GHz and 915 MHz Radio Board is delivered as a standalone Proprietary Wireless radio board_. It contains a EFR32FG13P Wireless SoC built on an ARM Cortex®-M4F processor with excellent low power capabilities.

The BRD4255A a.k.a. SLWRB4255A radio board plugs into the Wireless Starter Kit Mainboard BRD4001A and is supported as one of :ref:silabs_radio_boards.

Hardware

EFR32FG13P233F512GM48 Flex Gecko SoC
CPU core: ARM Cortex®-M4 with FPU
Flash memory: 512 kB
RAM: 64 kB
Transmit power: up to 19 dBm
Operation frequency: 2.4 GHz, 915 MHz
Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz).

For more information about the EFR32FG13 SoC and BRD4255A board, refer to these documents:

EFR32FG13 Website_
EFR32FG13 Datasheet_
EFR32xG13 Reference Manual_
BRD4255A Reference Manual_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

In the following table, the column Pin contains Pin names. For example, PA2 means Pin number 2 on PORTA, as used in the board's datasheets and manuals.

+-------+-------------+-------------------------------------+ | Pin | Function | Usage | +=======+=============+=====================================+ | PF4 | GPIO | LED0 | +-------+-------------+-------------------------------------+ | PF5 | GPIO | LED1 | +-------+-------------+-------------------------------------+ | PF6 | GPIO | Push Button PB0 | +-------+-------------+-------------------------------------+ | PF7 | GPIO | Push Button PB1 | +-------+-------------+-------------------------------------+ | PA5 | GPIO | Board Controller Enable VCOM_ENABLE | +-------+-------------+-------------------------------------+ | PA0 | USART0_TX | UART Console VCOM_TX US0_TX #0 | +-------+-------------+-------------------------------------+ | PA1 | USART0_RX | UART Console VCOM_RX US0_RX #0 | +-------+-------------+-------------------------------------+ | PC6 | SPI_MOSI | Flash MOSI US1_TX #11 | +-------+-------------+-------------------------------------+ | PC7 | SPI_MISO | Flash MISO US1_RX #11 | +-------+-------------+-------------------------------------+ | PC8 | SPI_SCLK | Flash SCLK US1_CLK #11 | +-------+-------------+-------------------------------------+ | PA4 | SPI_CS | Flash Chip Select (GPIO) | +-------+-------------+-------------------------------------+

System Clock

The EFR32FG13P SoC is configured to use the 38.4 MHz external oscillator on the board.

Serial Port

The EFR32FG13P SoC has three USARTs and one Low Energy UARTs (LEUART). USART0 is connected to the board controller and is used for the console.

Programming and Debugging

.. zephyr:board-supported-runners::

Flashing

Connect the BRD4001A board with a mounted BRD4255A radio module to your host computer using the USB port.

Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: slwrb4255a :goals: flash

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 see the following message in the terminal:

.. code-block:: console

Hello World! slwrb4255a

.. _EFR32FG13 Website: https://www.silabs.com/wireless/proprietary/efr32fg13-series-1-sub-ghz-2-4-ghz-socs

.. _EFR32FG13 Datasheet: https://www.silabs.com/documents/public/data-sheets/efr32fg13-datasheet.pdf

.. _EFR32xG13 Reference Manual: https://www.silabs.com/documents/public/reference-manuals/efr32xg13-rm.pdf

.. _standalone Proprietary Wireless radio board: https://www.silabs.com/development-tools/wireless/proprietary/slwrb4255a-efr32fg13-915-mhz-radio-board

.. _BRD4255A Reference Manual: https://www.silabs.com/documents/public/reference-manuals/brd4255a-rm.pdf