EFR32-SLWSTK6061A

Overview

The EFR32 Flex Gecko Wireless Starter Kit SLWSTK6061A contains a Wireless System-On-Chip from the EFR32FG family built on an ARM® Cortex®-M4F processor with excellent low power capabilities.

EFR32-SLWSTK6061A

EFR32-SLWSTK6061A (image courtesy of Silicon Labs)

Hardware

The SLWRB4250B radio board plugs into the Wireless Starter Kit Mainboard BRD4001A.

Wireless Starter Kit Mainboard:

  • Advanced Energy Monitoring provides real-time information about the energy consumption of an application or prototype design.

  • Ultra-low power 128x128 pixel memory LCD

  • 2 user buttons and 2 LEDs

  • Si7021 Humidity and Temperature Sensor

  • On-board Segger J-Link USB and Ethernet debugger

Radio Board:

  • EFR32FG1P133F256GM48 Flex Gecko SoC

  • 8Mbit SPI NOR Flash

For more information about the EFR32FG1 SoC and EFR32-SLWSTK6061A board, refer to these documents:

Supported Features

The efr32_slwstk6061a board configuration supports the following hardware features:

Interface

Controller

Driver/Component

NVIC

on-chip

nested vector interrupt controller

SYSTICK

on-chip

systick

COUNTER

on-chip

rtcc

FLASH

on-chip

flash memory

GPIO

on-chip

gpio

UART

on-chip

serial port-polling; serial port-interrupt

SPI(M)

on-chip

spi port-polling

The default configuration can be found in the defconfig file:

boards/arm/efr32_slwstk6061a/efr32_slwstk6061a_defconfig

Other hardware features are currently not supported by the port.

Connections and IOs

The EFR32FG1P SoC has five GPIO controllers (PORTA to PORTD and PORTF). All of them are enabled for the EFR32-SLWSTK6061A board.

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

Name

Function

Usage

PF4

GPIO

LED0

PF5

GPIO

LED1

PF6

GPIO

Push Button PB0

PF7

GPIO

Push Button PB1

PA5

GPIO

Board Controller Enable EFM_BC_EN

PA0

USART0_TX

UART Console EFM_BC_TX US0_TX #0

PA1

USART0_RX

UART Console EFM_BC_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 EFR32FG1P SoC is configured to use the 38.4 MHz external oscillator on the board.

Serial Port

The EFR32FG1P SoC has two USARTs and one Low Energy UARTs (LEUART). USART0 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

The EFR32-SLWSTK6061A 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 debug interface and a USB Serial Port.

  • A physical UART connection which is relayed over interface USB Serial port.

  • An Ethernet connection to support remote debugging.

It is compatible with the following host debug tools:

OpenOCD is included in the Zephyr SDK. Refer to the links above for information on how to install required host debug tools if you are not using the Zephyr SDK.

Flashing

Connect the EFR32-SLWSTK6061A board 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_slwstk6061a 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_slwstk6061a