Zephyr SimpleIot Application

This is a Zephyr Workspace T2 topology that sets up to build the SIOT Zephyr application.

Setup

• install Zephyr dependencies as outlined in the Getting Started Guide
• mkdir zephyr-siot
• cd zephyr-siot
• west init -m https://github.com/simpleiot/zephyr-siot.git
• west update
• cd siot
• . envsetup.sh (notice leading .)
• siot_setup

Build

• cd zephyr-siot/siot
• . envsetup.sh (notice leading .)
• siot_build_<board> src/<app>

Flashing

• siot_flash (STM32)
• siot_flash_esp <serial port> (serial port is required for ESP targets)

Open serial console

The SIOT firmware applications all have the serial shell enabled, so you can connect to that to interact with the system.

Highly recommend the tio tool.

• tio /dev/serial/by-id/...

Applications

• siot-net: Start of generic network connected SIOT app
• siot-serial: Start of generic serial connected SIOT app
• siggen: Signal generator app that uses DAC output.

Memory management

Getting all the memory knobs tuned correctly in Zephyr can be a challenge. Generally, the advice is to make sure stacks never go above 70% used (kernel thread stacks).

The following config options can also be enabled to help track down memory issues:

# Stack debugging information
# TODO: may want to remove for production
CONFIG_ASSERT=y
CONFIG_ASSERT_VERBOSE=y
CONFIG_THREAD_NAME=y
CONFIG_THREAD_STACK_INFO=y
CONFIG_STACK_CANARIES=y
CONFIG_STACK_SENTINEL=y