EFM32 Tiny Gecko (EFM32TG-STK3300)
Overview
The EFM32 Tiny Gecko Starter Kit EFM32TG-STK3300 contains a MCU from the EFM32TG family built on ARM® Cortex®-M3 processor with excellent low power capabilities.
Hardware
EFM32TG840F32 MCU with 32 kB flash and 4 kB RAM
Advanced Energy Monitoring provides real-time information about the energy consumption of an application or prototype design.
160 segment Energy Micro LCD
2 user buttons, 1 LED and a touch slider
Ambient Light Sensor, Inductive-capacitive metal sensor and touch sensor
On-board Segger J-Link USB debugger
For more information about the EFM32TG SoC and EFM32TG-STK3300 board:
Supported Features
The efm32tg_stk3300 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.
efm32tg_stk3300/efm32tg840f32 target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M3 CPU1 |
|
Flash controller |
on-chip |
Silicon Labs Gecko flash controller1 |
|
GPIO & Headers |
on-chip |
Silicon Labs Series 0-2 GPIO Peripheral1 |
|
on-chip |
|||
I2C |
on-chip |
Silicon Labs Series 0-2 I2C1 |
|
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
MTD |
on-chip |
Flash node1 |
|
Pin control |
on-chip |
Silabs Gecko Pin Controller1 |
|
Serial controller |
on-chip |
||
on-chip |
Gecko LEUART1 |
||
SRAM |
on-chip |
Generic on-chip SRAM1 |
|
Timer |
on-chip |
ARMv7-M System Tick1 |
Connections and IOs
The EFM32TG SoC has six gpio controllers (PORTA to PORTF), but only three are currently enabled (PORTB, PORTC and PORTD) for the EFM32TG-STK3300 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 |
|---|---|---|
PD7 |
GPIO |
LED0 |
PD8 |
GPIO |
Push Button PB0 |
PB11 |
GPIO |
Push Button PB1 |
PD0 |
USART1_TX |
UART Console USART1_TX #1 (EXP Pin 4) |
PD1 |
USART1_RX |
UART Console USART1_RX #1 (EXP Pin 6) |
System Clock
The EFM32TG SoC is configured to use the 32 MHz external oscillator on the board.
Serial Port
The EFM32TG SoC has two USARTs and one Low Energy UART (LEUART). USART1 is used for the console. It is exposed to the EXP Header on the board (TX: Pin 4, RX: Pin 6).
Programming and Debugging
The efm32tg_stk3300 board supports the runners and associated west commands listed below.
| flash | debug | debugserver | rtt | attach | |
|---|---|---|---|---|---|
| jlink | ✅ (default) | ✅ (default) | ✅ | ✅ | ✅ |
Note
Before using the kit the first time, you should update the J-Link firmware in Simplicity Studio or with JLinkConfig.
Flashing
The EFM32TG-STK3300 includes an J-Link debug adaptor built into the board. It is used to flash and debug the EFM32TG on the board.
Flashing an application to EFM32-STK3300
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 efm32tg_stk3300 samples/hello_world
Connect the EFM32TG-STK3300 to your host computer using the USB port. Flash the device:
west flash
Connect the board with Use a Serial-to-USB cable to connect the host computer with the board. The serial port is exposed on the EXP Header (TX: Pin 4, RX: Pin 6).
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 be able to see on the corresponding Serial Port the following message:
Hello World! efm32tg_stk3300/efm32tg840f32