Real-time constraints in a rapid prototyping language

Abstract

This paper presents real-time constraints of a prototyping language and some mechanisms for handling these constraints in rapidly prototyping embedded systems. Rapid prototyping of embedded systems can be accomplished using a Computer Aided Prototyping System (CAPS) and its associated Prototyping Language (PSDL) to aid the designer in handling hard real-time constraints. The language models time critical operations with maximum execution times, maximum response times and minimum periods. The mechanisms for expressing timing constraints in PSDL are described along with their meanings relative to a series of hardware models which include multi-processor configurations. We also describe a language construct for specifying the policies governing real-time behavior under overload conditions.