EFM32GG12 Thunderboard Kit

Overview

The EFM32GG12 Thunderboard Kit (SLTB009A) is an evaluation platform for the EFM32GG12 GiantGecko Microcontroller, featuring an ARM Cortex-M4 with FPU, 1024kB flash, and 192kB RAM.

SLTB009A (Credit: Silicon Labs)

Hardware

• PDM stereo microphones

• USB connectivity

• On-board Segger J-Link USB debugger

• 2 user buttons and 2 LEDs

• USB C connector

For more information about the WGM160P and SLTB009A board:

• SLTB009A Website

• SLTB009A User Guide

• EFM32GG12 Datasheet

• EFM32GG12 Reference Manual

Supported Features

The efm32gg_sltb009a board configuration supports the following hardware features:

Interface	Controller	Driver/Component
MPU	on-chip	memory protection unit
COUNTER	on-chip	rtcc
FLASH	on-chip	flash memory
GPIO	on-chip	gpio
I2C	on-chip	i2c port-polling
NVIC	on-chip	nested vector interrupt controller
UART	on-chip	serial port-polling; serial port-interrupt

The default configuration can be found in the defconfig file:

boards/arm/efm32gg_sltb009a/efm32gg_sltb009a_defconfig

Connections and IOs

The EFM32GG12 MCU has six GPIO controllers (PORTA to PORTF), all of which are currently enabled for the SLTB009A board.

In the following table, the column Name contains pin names. For example, PE1 means pin number 1 on PORTE, as used in the board’s datasheets and manuals.

Name	Function	Usage
PE12	GPIO	LED0
PA13	GPIO	LED1
PD5	GPIO	Push Button PB0
PD8	GPIO	Push Button PB1
PE7	UART_TX	UART TX Console VCOM_TX US0_TX #1
PE6	UART_RX	UART RX Console VCOM_RX US0_RX #1
PC0	I2C_SDA	SENSOR_I2C_SDA I2C0_SDA #1
PC1	I2C_SCL	SENSOR_I2C_SCL I2C0_SCL #1
PC4	I2C_SDA	SENSOR_I2C_SDA I2C1_SDA #1
PC5	I2C_SCL	SENSOR_I2C_SCL I2C1_SCL #1

System Clock

The EFM32GG12 MCU is configured to work at 72 MHz.

Serial Port

The EFM32GG12 SoC has five USARTs, two UARTs and two 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

Flashing

The SLTB009A includes an J-Link serial and debug adaptor built into the board. The adaptor provides:

• A USB connection to the host computer

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

Flashing an application to SLTB009A

Connect the SLTB009A to your host computer using the USB port.

Here is an example to build and flash the Hello World application.

# From the root of the zephyr repository
west build -b efm32gg_stb009a 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’ll see the following message on the corresponding serial port terminal session:

Hello World! efm32gg_sltb009a