Embedded Systems Programming: Accessing Databases from Esterel

A current limitation in embedded controller design and programming is the lack of database support in development tools such as Esterel Studio. This article proposes a way of integrating databases and Esterel by providing two application programming interfaces (APIs) which enable the use of relation...

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Bibliographic Details
Published in:EURASIP journal on embedded systems Vol. 2008; no. 1; p. 961036
Main Authors: White, David, Lüttgen, Gerald
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 2008
Springer Nature B.V
Subjects:
Application programming interface
Circuits and Systems
Control Structures and Microprogramming
Control systems design
Controllers
Electronic Circuits and Devices
Embedded systems
Engineering
Image and Speech Processing
Model-driven High-level Programming of Embedded Systems: Selected papers from SLA++P'07 and SLA++P'08
Programming
Query processing
Relational data bases
Research Article
Robotics
Signal
Warehouses
Application Programming Interface
Relational Database
External Data
Publisher Note
Controller Design
ISSN:1687-3963, 1687-3955, 1687-3963
Online Access:Get full text
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Summary:A current limitation in embedded controller design and programming is the lack of database support in development tools such as Esterel Studio. This article proposes a way of integrating databases and Esterel by providing two application programming interfaces (APIs) which enable the use of relational databases inside Esterel programs. As databases and Esterel programs are often executed on different machines, result sets returned as responses to database queries may be processed either locally and according to Esterel's synchrony hypothesis, or remotely along several of Esterel's execution cycles. These different scenarios are reflected in the design and usage rules of the two APIs presented in this article, which rely on Esterel's facilities for extending the language by external data types, external functions, and procedures, as well as tasks. The APIs' utility is demonstrated by means of a case study modelling an automated warehouse storage system, which is constructed using Lego Mindstorms robotics kits. The robot's controller is programmed in Esterel in a way that takes dynamic ordering information and the warehouse's floor layout into account, both of which are stored in a MySQL database.
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ISSN:1687-3963
1687-3955
1687-3963
DOI:10.1155/2008/961036