The Telecommand Management Framelet

Abstract

Telecommands encode actions to be performed on or by the AOCS software. Telecommands in traditional systems are represented by strings of bytes of which the first one is an identifier that defines the type of telecommand and that is followed by one or more bytes representing the data associated to the telecommand. Telecommand management is usually delegated to a dedicated task that, essentially, implements a case construct where, depending on the telecommand identifier, certain actions are taken. This solution is obviously not acceptable from the perspective of a framework which must explicitly recognize telecommands as hotspots and, for reasons of extensibility and reusability, should separate their management from their implementation. Separation is essential to achieving reusability since the implementation of the telecommands is necessarily applicationdependent. The telecommand framelet proposes a design solution to achieve this separation.