Providing Security of Vital Data for Conventional Microcontroller Applications

Abstract:

Microcontrollers are widely used in industrial world, and almost all kind of devices were based on microcontroller to achieve high flexibility and abilities. All microcontrollers have nonvolatile and volatile memories to execute the software. During the running, microcontroller calculates many variables and records them to any non-volatile memory to use later. After re-energizing, microcontroller takes the data calculated before the power off and executes the program. In case of any electrical writing error or any power loss during the writing procedure, un-written memory blocks or any un-written data leads to malfunctions. Proposed method uses a gray code based signed two memory blocks to secure the memory reserved for data. Microcontroller uses these memory blocks in alternately. Even if microcontroller has no any real-time ability, gray code provides a guarantee which block is written in last. For every re-starting microcontroller dos not lose the data. In case of any reading problem during the starting, microcontroller has two chances to decide the action. One is to start with default values and the other is to start with the previous data. This study is tested at elevator applications not to lose position and vital values.

• Periodical: Applied Mechanics and Materials (Volumes 789-790)
• Pages: 1059-1066
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.789-790.1059
• Online since: September 2015
• Authors: Bayram Akdemir*, Hasan Üzülmez
• Keywords: Data Security, Gray Code, Memory, Microcontroller, Non-Volatile

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