查看航天器上的处理器的源代码
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航天器上的处理器
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== 概述 == 空间环境对电子信号的最大威胁就是电离辐射,其能使本来是1的数字信号“翻转”变成0,反之亦然 因此航天处理器的主要性能指标就是抗辐射性、容错性,还有就是可靠、稳定 参考:[[南大西洋反常]] <br><br> == SPARC == === ERC32/LEON === ERC32 由欧洲航天局 (ESA) 设计,Temic(现被 Atmel 吞并)制造、销售。 有两个版本: * 一个是ERC32 Chip Set,其由定点(TSC691E)、浮点(TSC692E) 和 Memory Controller (TSC693E) 三个芯片组成。现在 Atmel 已经不再生产,亦不再提供支持。 * 另一个是 ERC32 Single Chip (TSC695),定点、浮点和 Memory Controller 都做到一个芯片内。 其皆实现 SPARC V7 的指令集 后 ESA 重新设计了 ERC32,且将 VHDL 代码开源,实现了先后实现了多个个版本: LEON (SPARC V7),LEON2 (SPARC V8) 和最新的 LEON3 (SPARC V8)。 下图是 LEON2 的容错 (Fault Tolerant) 版本 -- LEON2FT: [[文件:LEON2FT-dia.jpg]] 嫦娥一号上主要的两台计算机即使用 ERC32(TSC695F) 参考: * http://vlsicad.eecs.umich.edu/BK/Slots/cache/www.gaisler.com/products/leon2/leon.html * http://en.wikipedia.org/wiki/ERC32 * http://www.esa.int/TEC/Microelectronics/ * http://www.atmel.com/dyn/products/devices.asp?family_id=641#1478 * http://www.gaisler.com/cms/index.php?option=com_content&task=section&id=4&Itemid=33 <br><br> === EH32 === <br><br> == MIPS == === Mongoose-V === [[文件:Mongoose-v.jpg]] ;Feature: <pre> Radiation hardened 10~15 MHz version of the MIPS R3000 Developed by Synova, Inc. </pre> ;Applications: * NASA's Earth Observer 1 (EO-1) satellite (launched in Nov. 2000) --- Main flight computer * NASA's Microwave Anisotropy Probe (MAP), (launched in June 2001) --- Main flight computer similar to that on EO-1. * NASA's three microsatellites of Space Technology 5 (ST5) (launched in Mar. 2006) --- Onboard flight computer (the Command & Data Handling system) * NASA's New Horizons spacecraft --- Two computer system, the Command and Data Handling system and the Guidance and Control processor. Each of the two systems is duplicated for redundancy, giving a total of four computers. ;Reference: * [1] Speer, D. and G. Jackson and D. Raphael, "Flight Computer Design for the Space Technology 5 (ST-5) Mission," Proceedings of the 2002 IEEE Aerospace Conference, Big Sky, MT, March 2002. * [3] http://www.synova.com/proc/mg5.html * [4] http://en.wikipedia.org/wiki/Mongoose-V * [5] http://en.wikipedia.org/wiki/New_Horizons#Flight_computer <br><br> === RH32 === ;Feature: <pre> Radiation hardened, fault tolerance Based on MIPS R3000 Manufactured by Honeywell </pre> ;Applications: ;Reference: * [1] Hwang, A.S, "Radiation hardened 32-bit RISC microprocessor" Aerospace Conference Proceedings, 2000 IEEE, Big Sky, MT, 2000 * [2] http://www.honeywell.com/sites/aero/Data-Processing.htm <br><br> == PowerPC == === RHPPC === ;Feature: <pre> Radiation hardened Based on PowerPC 603e, compatible with the PowerPC architecture (Book I-III) 190MIPS @ 100MHz 25 ~ 50 MHz 60xbus (SYSCLK) Superscalar, Out-of-order, 5 units (include a float point unit) Manufactured by Honeywell </pre> ;Applications: ;Reference: <br><br> === RAD600 === <br><br> === RAD750 === <br><br> == C51 == MIL-STD-1750A <br><br> == 参考文献 == * 基于LEON3的高可靠体系结构设计关键技术研究,2006 * 航天高可靠处理器容错设计与实现,2007 * http://www.opensat.cc/wiki/index.php#understanding_satellite_systems * http://www.cubesatkit.com/docs/cubesatkitsystemchart.pdf * https://wiki.satnogs.org/Main_Page <br><br> <br><br> <br><br> <br><br> <br><br> <br><br> <br><br> <br><br>
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