.. zephyr:board:: pg28_pk2506a

Overview

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The EFM32PG28 Pearl Gecko Board dev kit contains a System-On-Chip from the EFM32PG28 family built on an ARM Cortex®-M33 processor with excellent low power capabilities.

Hardware

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• EFM32PG28B310F1024IM68 Pearl Gecko SoC
• CPU core: ARM Cortex®-M33
• Flash memory: 1024 kB
• RAM: 256 kB
• Key features:
  • USB connectivity
  • Advanced Energy Monitor (AEM)
  • SEGGER J-Link on-board debugger
  • Debug multiplexer supporting external hardware as well as on-board MCU
  • 4x10 segment LCD
  • User LEDs and push buttons
  • Silicon Labs' Si7021 Relative Humidity and Temperature Sensor
  • SMA connector for IADC demonstration
  • Inductive LC sensor
  • 20-pin 2.54 mm header for expansion boards
  • Breakout pads for direct access to I/O pins
  • Power sources include USB and CR2032 coin cell battery

For more information about the EFM32PG28 SoC and BRD2506A board, refer to these documents:

• EFM32PG28 Website_
• EFM32PG28 Datasheet_
• EFM32PG28 Reference Manual_
• BRD2506A User Guide_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

In the following table, the column Name contains Pin names. For example, PA2 means Pin number 2 on Port A, as used in the board's datasheets and manuals.

+------+-----------------+---------------------+ | Name | Function | Usage | +======+=================+=====================+ | PB1 | GPIO | Push Button 0 | +------+-----------------+---------------------+ | PB6 | GPIO | Push Button 1 | +------+-----------------+---------------------+ | PC10 | GPIO/TIMER0_CC0 | LED0 | +------+-----------------+---------------------+ | PC11 | GPIO/TIMER0_CC1 | LED1 | +------+-----------------+---------------------+ | PD7 | EUSART1_TX | Console Tx | +------+-----------------+---------------------+ | PD8 | EUSART1_RX | Console Rx | +------+-----------------+---------------------+ | PD9 | I2C0_SDA | Si7021 I2C Data | +------+-----------------+---------------------+ | PD10 | I2C0_SCL | Si7021 I2C Clock | +------+-----------------+---------------------+

The default configuration can be found in :zephyr_file:boards/silabs/dev_kits/pg28_pk2506a/pg28_pk2506a_defconfig

System Clock

The EFM32PG28 SoC is configured to use the 39 MHz external oscillator on the board.

Serial Port

The EFM32PG28 SoC has one USART and three EUSARTs. EUSART1 is connected to the board controller and is used for the console.

Programming and Debugging

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.. zephyr:board-supported-runners::

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

Flashing

The sample application :zephyr:code-sample:hello_world is used for this example. Build the Zephyr kernel and application:

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: pg28_pk2506a :goals: build

Connect the pg28_pk2506a to your host computer using the USB port and you should see a USB connection.

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! pg28_pk2506a

Troubleshooting

If no serial output occurs, use SEGGERs RTT Viewer and update :zephyr_file:boards/silabs/dev_kits/pg28_pk2506a/pg28_pk2506a_defconfig with

.. code-block:: console

CONFIG_UART_CONSOLE=n CONFIG_RTT_CONSOLE=y CONFIG_USE_SEGGER_RTT=y

.. _EFM32PG28 Website: https://www.silabs.com/mcu/32-bit-microcontrollers/efm32pg28-series-2#

.. _EFM32PG28 Datasheet: https://www.silabs.com/documents/public/data-sheets/efm32pg28-datasheet.pdf

.. _EFM32PG28 Reference Manual: https://www.silabs.com/documents/public/reference-manuals/efm32pg28-rm.pdf

.. _BRD2506A User Guide: https://www.silabs.com/documents/public/user-guides/ug545-efm32pg28-brd2506a-user-guide.pdf