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RESTOP: Retaining External Peripheral State in Intermittently-Powered Sensor Systems.

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Summary
This summary is machine-generated.

This study introduces RESTOP, a middleware for transient computing systems. RESTOP enables external peripherals to retain their state across power cycles without energy buffers, advancing miniaturized sensor systems.

Keywords:
energy harvestingexternal peripheralsensor systemtransient computing

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Embedded Systems

Background:

  • Energy harvesting sensor systems rely on energy buffers, hindering miniaturization.
  • Transient computing operates without buffers, but peripheral state retention is a challenge.

Purpose of the Study:

  • To propose RESTOP, a flexible middleware for retaining external peripheral states in transient computing.
  • To enable computation across power cycles without energy buffers for peripherals.

Main Methods:

  • Developed RESTOP middleware to interface between microcontrollers and peripherals (SPI, I2C).
  • Implemented a run-time data recording mechanism to restore peripheral configuration.
  • Validated RESTOP with three digitally interfaced peripherals.

Main Results:

  • Successfully restored peripheral configurations after power interruptions.
  • Achieved a maximum peripheral configuration time overhead of 15%.
  • Demonstrated a low overall execution overhead of 0.82% for sensing applications.

Conclusions:

  • RESTOP provides a generic solution for peripheral state retention in transient computing.
  • The middleware significantly reduces the overhead compared to existing approaches.
  • Enables further miniaturization of energy harvesting sensor systems.