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Matt Liberty

Matt Liberty is the creator of Joulescope®, the easy-to-use, affordable test instrument for low-power design. He is also the founder of Jetperch LLC, a software and hardware engineering consultancy. Matt was the primary inventor of Hillcrest Labs' Freespace® motion control technology, and he was granted 34 US patents. Matt has a broad engineering background encompassing digital signal processing, PCB development, FPGA development, and software development in C, C++, and Python.

Distributed PubSub for Microcontrollers

Available in 26 days, 18 hours and 30 minutes

Do you waste time “plumbing” firmware to connect a new feature?  Worry about managing dependencies between modules?  Struggle to manage state when things go wrong?  

In this session, we discuss real-world software architecture, dependencies, and state.  We examine the publish-subscribe (PubSub) design pattern, what problems it solves, and what challenges it creates.  We discuss how to create a distributed, reliable PubSub implementation that can span multiple microcontrollers with state recovery on failure.  We explore one solution, Fitterbap, a new open-source C library with host Python bindings, which includes:

  • An efficient, distributed PubSub implementation with simple metadata that allows you to quickly add, remove, and modify firmware controls.
  • A small, high-reliability data link layer, suitable for local data streams including UART.
  • Multiplexed, fast, reliable data streams, such as for sample waveform data.
  • A UI (python + Qt + PySide) that runs on your host computer.  The UI automatically instantiates controls from the metadata and plots streaming data.

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You've Got the Power. Manage it Wisely. (2020)

Status: Available Now

No customer wants to change or recharge batteries. This talk explores the techniques and methods to develop products that wisely consume only the energy that they need. Following a quick review of current, voltage, power, and energy, this session will cover:

  1. The techniques used to budget for energy consumption during the initial product design
  2. The equipment and methods used to measure voltage, current, power & energy
  3. The common ways of reducing energy consumption in your product after you have hardware and software. These techniques span both hardware and software.

Energy management applies to nearly all battery-powered products including mobile phones, toys, and Internet of Things end node. Even always-on mains powered devices are concerned with power consumption to meet energy regulations, reduce cost, and consume less energy. This talk will help you develop better, more energy-efficient products.

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