Embedded real-time systems
A practitioner's handbook for real-time analysis
A practitioner's handbook for real-time analysis
Specification and design of embedded systems
Specification and design of embedded systems
Interval scheduling: fine-grained code scheduling for embedded systems
DAC '95 Proceedings of the 32nd annual ACM/IEEE Design Automation Conference
Co-Synthesis of Hardware and Software for Digital Embedded Systems
Co-Synthesis of Hardware and Software for Digital Embedded Systems
Scheduling for Reactive Real-Time Systems
IEEE Micro
Uninterpreted Co-Simulation for Performance Evaluation of Hw/Sw Systems
CODES '96 Proceedings of the 4th International Workshop on Hardware/Software Co-Design
A framework for interactive analysis of timing constraints in embedded systems
CODES '96 Proceedings of the 4th International Workshop on Hardware/Software Co-Design
System-level codesign of mixed hardware-software systems
System-level codesign of mixed hardware-software systems
Constrained software generation for hardware-software systems
CODES '94 Proceedings of the 3rd international workshop on Hardware/software co-design
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Our focus in this paper is the software implementation of control oriented systems. Such a task is one of the least automated portions of the contemporary CoDesign process. In systems that must respond to external events, often several asynchronous tasks are implemented on the same processor. We are studying such systems because often, they utilize a dynamic multi-rate scheduling technique using a multitasking real time kernel. Based upon the MCSE functional model as a specification input, we propose a set of transformation rules one can apply to the functional structure to reduce the complexity of the software design prior to implementation. We further show that after such optimizations, the microprocessor interrupt system can often be used as an efficient priority-based scheduler, thereby removing the need for a real time kernel. The resulting implementation is described using a software implementation diagram from which it is easy to prove the timing constraints are satisfied. We use a simplified control system to illustrate our approach and to show a smooth incremental CoDesign path with a better integration of software estimates into the partitioning decision.