Circuit and method for task monitoring

A method for performing logical and temporal task monitoring of a plurality of tasks executed in a processing system, the method comprising:

• receiving, by a task management circuit of the processing system, as input, a plurality of task signals, each task signal indicating an execution state of a respective task;
• operating, by a managing circuit of the task management circuit, in at least three modes depending on a respective event corresponding to either a detection of a rising edge or a falling edge of a given task signal in the plurality of task signals being monitored, or an occurrence of a trigger signal;
• in each mode:
• checking, by the managing circuit, whether at least a variable representing an operation state of the respective task contains an expected value corresponding to an occurrence of the respective event enabling the respective mode, and outputting, by the managing circuit, a result of the check in an error signal for the respective task being monitored;
• storing, by the task management circuit, a first timestamp value corresponding to the occurrence of the respective event;
• sending, by the task management circuit, a respective command for each respective mode determined by the respective event to a task recording circuit of the processing system;
• storing, by the task management circuit, a second timestamp value corresponding to the sending of the respective command for each respective mode determined by the respective event;
• computing, by the task recording circuit, for a given task being monitored, based on the second timestamp values stored for the given task in correspondence of each one of the events, a duration of the given task being monitored;
• checking, by the task recording circuit, whether the duration of the given task being monitored corresponds to a duration expected value or is within a range of duration values;
• and
• outputting, by the task recording circuit, a signal indicating error in response to the duration of the given task being different from the duration expected value or outside the range.