Analysis of Connection Schemes between the ICU and the DPU of the NISP Instrument of the Euclid Mission

Colodro-Conde, Carlos; Toledo-Moreo, R.; Diaz-Garcia, Jose J.; Tubío-Araujo, Óscar Manuel; Villó-Pérez, Isidro; Toledo-Moreo, F. Javier; Martínez-Álvarez, J. Javier; Garrigós-Guerrero, Fco. Javier; Vicente, José Manuel Ferrández; Rebolo, R.

doi:10.1007/978-3-642-38622-0_40

Cited by 1 publication

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“…In a satellite spacecraft, an Instrument Control Unit (ICU) is a box in charge of control and monitoring one of the satellite instruments. The ICU will generally communicate with other elements of the instrument, as well as the spacecraft main Control and Management Unit (CDMU), by means of different buses [1] (e.g., Milbus 1553, SpaceWire, high-speed serial lines).…”

Section: Introductionmentioning

confidence: 99%

Development of Embedded Boot Software for a Satellite Instrument Control Unit: Lessons Learned

Fernández-Conde

Gómez-Saez-de-Tejada

Pérez-Lizán

et al. 2019

International Journal of Aerospace Engineering

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A satellite spacecraft is generally composed of a central Control and Data Management Unit (CDMU) and several instruments, each one locally controlled by its Instrument Control Unit (ICU). Inside each ICU, the embedded boot software (BSW) is the very first piece of software executed after power-up or reset. The ICU BSW is a nonpatchable, stand-alone, real-time software package that initializes the ICU HW, performs self-tests, and waits for CDMU commands to maintain on-board memory and ultimately start a patchable application software (ASW), which is responsible for execution of the nominal tasks assigned to the ICU (control of the satellite instrument being the most important one). The BSW is a relatively small but critical software item, since an unexpected behaviour can cause or contribute to a system failure resulting in fatal consequences such as the satellite mission loss. The development of this kind of embedded software is special in many senses, primarily due to its criticality, real-time expected performance, and the constrained size of program and data memories. This paper presents the lessons learned in the development and HW/SW integration phases of a satellite ICU BSW designed for a European Space Agency mission.

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Section: Introductionmentioning

confidence: 99%