.. zephyr:board:: 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:

- `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
:zephyr_file:`boards/silabs/dev_kits/sltb009a/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
   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 :zephyr:code-sample:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: sltb009a
   :goals: 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:

.. code-block:: console

   Hello World! sltb009a

.. _SLTB009A Website:
   https://www.silabs.com/development-tools/thunderboard/thunderboard-gg12-kit

.. _SLTB009A User Guide:
   https://www.silabs.com/documents/public/user-guides/ug371-sltb009a-user-guide.pdf

.. _EFM32GG12 Datasheet:
   https://www.silabs.com/documents/public/data-sheets/efm32gg12-datasheet.pdf

.. _EFM32GG12 Reference Manual:
   https://www.silabs.com/documents/public/reference-manuals/efm32gg12-rm.pdf

.. _J-Link:
   https://www.segger.com/jlink-debug-probes.html