This work is described the structure of information input/output system. We offer method which based on conception digital-platform design . Conception digital-platform is defined base structure of software on-board systems and has follow properties: modularity, scalability, a possibility to reconfigure the system, reliability. These properties are defined structure of input/output subsystem.
Main idea of organization input/output is based on conception information field (blackboard) on-board systems. We offer next io-components: computing component, interface component, device driver.
The following aims were pointed during the design of the structure of input/output subsystem in controlling systems of a spacecraft:
ruling computational process and communications;
controlling hardware operability during all stages of its lifecycle;
providing the guaranteed strict real-time;
possible re-usage of already developed software for similar systems;
increasing the hardware-independency;
a possibility to reconfigure the system;
an ability of the system to function either in RTOS environment, or separately without any OS.