EFM32GG12 Thunderboard (SLTB009A)

Overview

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

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:

Supported Features

The sltb009a board supports the hardware features listed below.

on-chip / on-board: Feature integrated in the SoC / present on the board.
2 / 2: Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo: Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

`sltb009a/efm32gg12b810f1024gm64` target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M4F CPU1	`arm,cortex-m4f`
Flash controller	on-chip	Silicon Labs Gecko flash controller1	`silabs,gecko-flash-controller`
GPIO & Headers	on-chip	SiLabs Gecko GPIO1	`silabs,gecko-gpio`
GPIO & Headers	on-chip	SiLabs Gecko GPIO Port6	`silabs,gecko-gpio-port`
I2C	on-chip	Silabs Gecko I2C2	`silabs,gecko-i2c`
Input	on-board	Group of GPIO-bound input keys1	`gpio-keys`
Interrupt controller	on-chip	ARMv7-M NVIC (Nested Vectored Interrupt Controller)1	`arm,v7m-nvic`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
MTD	on-chip	Flash node1	`soc-nv-flash`
MTD	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	`fixed-partitions`
Pin control	on-chip	The Silabs pin controller is a singleton node responsible for controlling pin function selection and pin properties1	`silabs,gecko-pinctrl`
RNG	on-chip	GECKO TRNG (True Random Number Generator)1	`silabs,gecko-trng`
RTC	on-chip	Silabs Gecko RTCC (Real-Time Counter)1	`silabs,gecko-rtcc`
Serial controller	on-chip	Gecko UART2	`silabs,gecko-uart`
	on-chip	Gecko USART2 3	`silabs,gecko-usart`
	on-chip	Gecko LEUART1 1	`silabs,gecko-leuart`
SRAM	on-chip	Generic on-chip SRAM description1	`mmio-sram`
Timer	on-chip	ARMv7-M System Tick1	`arm,armv7m-systick`
Watchdog	on-chip	Silicon Labs Gecko Family Watchdog driver1 1	`silabs,gecko-wdog`

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 in Simplicity Studio.

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 sltb009a 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! sltb009a