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Overview

boards/gardena/sgrm/doc/index.rst

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.. zephyr:board:: sgrm

Overview

This is a SoM that is used as a radio module by the GARDENA smart gateway (manual_, FOSS parts_).

.. _manual: https://content.tdr.dss.husqvarnagroup.net/pub000094159/doc000240276 .. _FOSS parts: https://github.com/husqvarnagroup/smart-garden-gateway-public

Hardware

  • Silicon Labs SiM3U167-B-GM_ SoC
  • Silicon Labs Si4467_ transceiver (via SPI)
  • Controls an RGB LED via high drive pins. It's expected to mirror the state of 3 low-drive pins coming from the Linux SoC.
  • UART is connected to the Linux SoC. Usually it's used for PPP, but it can also be used for debugging when PPP is not active.

.. _SiM3U167-B-GM: https://www.silabs.com/mcu/32-bit-microcontrollers/precision32-sim3u1xx/device.SiM3U167-B-GQ?tab=specs .. _Si4467: https://www.silabs.com/wireless/proprietary/ezradiopro-sub-ghz-ics/device.si4467?tab=specs

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

+--------+--------------------------+----------------------------------------------------+ | Pin | Name | Note | +========+==========================+====================================================+ | PB0.0 | TX (O) | Serial connection to the Linux SoM | +--------+--------------------------+ | | PB0.1 | RX (I) | | +--------+--------------------------+ | | PB0.2 | RTS (O) | | +--------+--------------------------+ | | PB0.3 | CTS (I) | | +--------+--------------------------+----------------------------------------------------+ | PB0.4 | LED red (I) | Controlled by the Linux SoM | +--------+--------------------------+ | | PB0.5 | LED green (I) | | +--------+--------------------------+ | | PB0.6 | LED blue (I) | | +--------+--------------------------+----------------------------------------------------+ | PB0.13 | TX (O) | UART1 for debugging (no connection to Linux SoM) | +--------+--------------------------+ | | PB0.14 | RX (I) | | +--------+--------------------------+----------------------------------------------------+ | PB4.0 | LED red (O) | Mirrors PB0.4 | +--------+--------------------------+----------------------------------------------------+ | PB4.1 | LED green (O) | Mirrors PB0.5 | +--------+--------------------------+----------------------------------------------------+ | PB4.2 | LED blue (O) | Mirrors PB0.6 | +--------+--------------------------+----------------------------------------------------+

Programming and Debugging

.. zephyr:board-supported-runners::

Flashing

The easiest way is to do this via SSH from the Linux SoM that's connected to the SiM3U SoM.

On your building machine:

.. code-block:: shell

scp -O build/zephyr/zephyr.hex root@IP:/tmp/

On the gateway:

.. code-block:: shell

openocd -f board/gardena_radio.cfg -c 'program /tmp/zephyr.hex verify exit' reset-rm

Debugging

The easiest way is to do this via SSH from the Linux gateway as well:

.. code-block:: shell

openocd -f board/gardena_radio.cfg -c init