EFR32 BRD4161A (SLWRB4161A)
Overview
The EFR32MG12 Mighty Gecko Radio Board contains a Wireless System-On-Chip from the EFR32MG12 family built on an ARM Cortex®-M4F processor with excellent low power capabilities.
SLWRB4161A (image courtesy of Silicon Labs)
The BRD4161A a.k.a. SLWRB4161A radio board plugs into the Wireless Starter Kit Mainboard BRD4001A and is supported as one of EFR32 Radio Boards.
Hardware
EFR32MG12P432F1024GL125 Mighty Gecko SoC
CPU core: ARM Cortex®-M4 with FPU
Flash memory: 1024 kB
RAM: 256 kB
Transmit power: up to +19 dBm
Operation frequency: 2.4 GHz and Sub-Ghz
Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz).
For more information about the EFR32MG12 SoC and BRD4170A board, refer to these documents:
Supported Features
Please refer to EFR32 Radio Board Supported Features for details of the configuration and common features supported by the efr32_radio_brd4161a board.
The default configuration can be found in the defconfig file:
boards/arm/efr32_radio/efr32_radio_brd4161a_defconfig
System Clock
The EFR32MG12P SoC is configured to use the 38.4 MHz external oscillator on the board.
Serial Port
The EFR32MG12P SoC has four USARTs and one Low Energy UARTs (LEUART). USART0 is connected to the board controller and is used for the console.
Programming and Debugging
Please refer to Programming and Debugging EFR32 Radio Board for details on the supported debug interfaces.
Flashing
Connect the BRD4001A board with a mounted BRD4170A radio module to your host computer using the USB port.
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b efr32_radio_brd4161a samples/hello_world
west 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:
Hello World! efr32_radio_brd4161a