Beta Version
Times 1.3 Beta now available online! Download here.
Times User Group
Has been created on YahooGroups!
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Tool Paper
Presented at TACAS'02, received ETAPS'02 Best Tool Demo Award.
Available here.
Background Paper
Presented at TACAS'02.
Available here.
Last update:
Thursday, 06 Nov 2008, 10:26:39
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The Times Tool
Times - A Tool for Modeling and Implementation of Embedded Systems. It is a tool set for modelling, schedulability analysis, synthesis of (optimal) schedules and executable code. It is appropriate for systems that can be described as a set of tasks which are triggered periodically or sporadically by time or external events.

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Currently Times supports system specification, system analysis and code generation for LegoOS platform. A system specification in Times consists of three parts: the control automata modelled as a network of timed automata extended with tasks, a task table with information about the processes triggered (released) when the control automata changes location, and a scheduling policy.
Main Features
  • A graphical editor for timed automata extended with tasks, which allows the user to model a system and the abstract behaviour of its environment. In addition the user may specify a set of preemptive or non-preemtive tasks with parameters such as (relative) deadline, execution time, priority, etc.
  • A simulator, in which the user can validate the dynamic behaviour of the system and see how the tasks execute according to the task parameters and a given scheduling policy. The simulator shows a graphical representation of the generated trace showing the time points when the tasks are released, invoked, suspended, resumed, and completed.
  • A verifier for schedulability analysis, which is used to check if all reachable states of the complete system are schedulable that is, all task instances meet their deadlines. A symbolic algorithm has been developed based on the DBM techniques and implemented based on the verifier of the Uppaal tool.
  • A code generator for automatic synthesis of C-code on LegoOS platform from the model. If the automata model is schedulable according to the schedulability analyser the execution of the generated code will meet all the timing constraints specified in the model and the tasks.

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(C) 2007 DARTS, IT Dept, CS, Uppsala University, Sweden