Smart Garden Radio Module

Board Overview

Smart Garden Radio Module

Name:

sgrm

Vendor:

GARDENA GmbH

Architecture:

arm

SoC:

sim3u167

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Overview

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

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.

Supported Features

The sgrm 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.

sgrm

/

sim3u167

sgrm/sim3u167 target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M3 CPU1	arm,cortex-m3
Clock control	on-chip	Silabs Si32 PLL clock controller node1	silabs,si32-pll
	on-chip	Silabs Si32 AHB clock controller node1	silabs,si32-ahb
	on-chip	Silabs Si32 APB clock controller node1	silabs,si32-apb
Cryptographic accelerator	on-chip	Si32 AES node1	silabs,si32-aes
DMA	on-chip	Si32 DMA controller1	silabs,si32-dma
Flash controller	on-chip	Silabs Si32 flash controller1	silabs,si32-flash-controller
GPIO & Headers	on-chip	Si32 GPIO4	silabs,si32-gpio
Interrupt controller	on-chip	ARMv7-M NVIC (Nested Vectored Interrupt Controller)1	arm,v7m-nvic
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	Silabs Si32 Pin Controller1	silabs,si32-pinctrl
Serial controller	on-chip	Si32 USART2	silabs,si32-usart
SRAM	on-chip	Generic on-chip SRAM description1	mmio-sram
Timer	on-chip	ARMv7-M System Tick1	arm,armv7m-systick

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

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:

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

On the gateway:

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:

openocd -f board/gardena_radio.cfg -c init