EFM32 Pearl Gecko 12 (SLSTK3402A)

Board Overview

EFM32 Pearl Gecko 12 (SLSTK3402A)

Name:

slstk3402a

Vendor:

Silicon Laboratories

Architecture:

arm

SoC:

efm32jg12b500f1024gl125, efm32pg12b500f1024gl125

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Overview

The EFM32 Pearl Gecko 12 Starter Kit SLSTK3402A contains an MCU from the EFM32PG family built on an ARM® Cortex®-M4F processor with excellent low power capabilities.

Hardware

• 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, 2 LEDs and a touch slider

• Humidity, temperature, and inductive-capacitive metal sensor

• On-board Segger J-Link USB debugger

For more information about the EFM32PG SoC and SLSTK3402A board:

• EFM32PG Website

• EFM32PG12 Datasheet

• EFM32PG12 Reference Manual

• SLSTK3402A Website

• SLSTK3402A User Guide

• SLSTK3402A Schematics

Supported Features

The slstk3402a 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.

slstk3402a/efm32jg12b500f1024gl125 target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M3 CPU1	arm,cortex-m3
ADC	on-chip	Silicon Labs Gecko Series 1 ADC1	silabs,gecko-adc
Flash controller	on-chip	Silicon Labs Gecko flash controller1	silabs,gecko-flash-controller
GPIO & Headers	on-chip	SiLabs Gecko GPIO1	silabs,gecko-gpio
	on-chip	SiLabs Gecko GPIO Port4 5	silabs,gecko-gpio-port
I2C	on-chip	Silabs Gecko I2C1 1	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
	on-board	Group of PWM-controlled LEDs1	pwm-leds
MTD	on-chip	Flash node1	soc-nv-flash
	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
PWM	on-chip	Silabs Gecko PWM port1	silabs,gecko-pwm
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 USART1 3	silabs,gecko-usart
	on-chip	Gecko LEUART1	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 driver2	silabs,gecko-wdog

slstk3402a/efm32pg12b500f1024gl125 target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M4F CPU1	arm,cortex-m4f
ADC	on-chip	Silicon Labs Gecko Series 1 ADC1	silabs,gecko-adc
Flash controller	on-chip	Silicon Labs Gecko flash controller1	silabs,gecko-flash-controller
GPIO & Headers	on-chip	SiLabs Gecko GPIO1	silabs,gecko-gpio
	on-chip	SiLabs Gecko GPIO Port4 5	silabs,gecko-gpio-port
I2C	on-chip	Silabs Gecko I2C1 1	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
	on-board	Group of PWM-controlled LEDs1	pwm-leds
MTD	on-chip	Flash node1	soc-nv-flash
	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
PWM	on-chip	Silabs Gecko PWM port1	silabs,gecko-pwm
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 USART1 3	silabs,gecko-usart
	on-chip	Gecko LEUART1	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 driver2	silabs,gecko-wdog

EFM32 Jade Gecko SoC

The EFM32 Pearl Gecko Starter Kit SLSTK3402A can also be used to evaluate the EFM32 Jade Gecko SoC (EFM32JG12). The only difference between the Pearl Gecko and the Jade Gecko is their core. The Pearl Gecko contains an ARM® Cortex®-M4F core, and the Jade Gecko an ARM® Cortex®-M3 core. Other features such as memory and peripherals are the same.

Code that is built for the Jade Gecko also runs on an equivalent Pearl Gecko.

To build firmware for the Jade Gecko and run it on the EFM32 Pearl Gecko Starter Kit, use the board slstk3402a/efm32jg12b500f1024gl125 instead of slstk3402a/efm32pg12b500f1024gl125.

Connections and IOs

The EFM32PG12 SoC has twelve GPIO controllers (PORTA to PORTL), but only four are currently enabled (PORTA, PORTB, PORTD and PORTF) for the SLSTK3402A board.

In the following table, the column Name contains pin names. For example, PE2 means pin number 2 on PORTE, 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	UART_TX	UART TX Console VCOM_TX US0_TX #0
PA1	UART_RX	UART RX Console VCOM_RX US0_RX #0
PD10	UART_TX	EXP12_UART_TX LEU0_TX #18
PD11	UART_RX	EXP14_UART_RX LEU0_RX #18
PC10	I2C_SDA	ENV_I2C_SDA I2C0_SDA #15
PC11	I2C_SCL	ENV_I2C_SCL I2C0_SCL #15

System Clock

The EFM32PG12 SoC is configured to use the 40 MHz external oscillator on the board.

Serial Port

The EFM32PG12 SoC has four USARTs and one Low Energy UART (LEUART).

Programming and Debugging

Note

Before using the kit the first time, you should update the J-Link firmware in Simplicity Studio.

Flashing

The SLSTK3402A 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 mass storage device and a USB serial port.

• A serial flash device, which implements the USB flash disk file storage.

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

Flashing an application to SLSTK3402A

The sample application Hello World is used for this example. Build the Zephyr kernel and application:

# From the root of the zephyr repository
west build -b slstk3402a/efm32pg12b500f1024gl125 samples/hello_world

Connect the SLSTK3402A to your host computer using the USB port and you should see a USB connection which exposes a mass storage device(STK3402A). Copy the generated zephyr.bin to the STK3402A drive.

Use a USB-to-UART converter such as an FT232/CP2102 to connect to the UART on the expansion header.

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! slstk3402a