Control system and method for optical communication device application

Abstract

The objective of the present invention is to provide with control system and method for optical communication device application, the system and the method cooperatively controlling software and an optical device controller (hardware) contributing a plurality of loops, at least one of which having a singularity more than first order. In order to achieve the objective, the present invention provide with the following configuration. CPU performs the temperature control task as the highest priority task, and the others as lower priority tasks: such as the wavelength control task, the laser output level control task and other kind of tasks 4˜n. Service functions, which notify event, information, and so on to a client, are provided with as programs in order to message, for example the control task things, to the RTOS. There are three states as those of task, i.e., blocked, suspended, and execution state; switching between these states is caused by the action of service functions responding to the occurrence of the interruption, execution event of the other task, and so on. A task SW (switch) switches respective tasks based on the scheduling rules (event driven, time slice, priority, and so on). According to the present invention, the temperature control task is executed first; the other tasks are booted and then suspended maintaining default values until the task SW recovers the execution. When temperature has become stable by way of the temperature control task, the other respective tasks are executed in a certain order after the assignment of the CPU resources.

Dependencies are inferred from the claim text.