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Herschel PACS - IIDR SIGNAL PROCESSING UNIT (SPU) HW Unit, Start-up SW and Low-level SW Drivers

Herschel PACS - IIDR SIGNAL PROCESSING UNIT (SPU) HW Unit, Start-up SW and Low-level SW Drivers. José M. Herreros INSTITUTO DE ASTROFÍSICA DE CANARIAS. SPU REQUIREMENTS.

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Herschel PACS - IIDR SIGNAL PROCESSING UNIT (SPU) HW Unit, Start-up SW and Low-level SW Drivers

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  1. Herschel PACS - IIDR SIGNAL PROCESSING UNIT(SPU)HW Unit, Start-up SW and Low-level SW Drivers José M. Herreros INSTITUTO DE ASTROFÍSICA DE CANARIAS Herschel PACS SPU - IAC

  2. SPU REQUIREMENTS • SPU HW Requirements are defined in the “PACS SPU Requirements Specification Document”, Doc No.: PACS-IAC-SP-001, Issue/Rev : draft 0, 24 Sep 1999. Two RED MARKED copies available. ISSUE 1 on elaboration. • SPU Start-up SW and Low-level SW Drivers Requirements are defined in the “LFI-REBA and PACS-SPU Start-up SW and Low-level SW Drivers URD” Document. Doc No.: PACS-IC-RD-001.01 • HW-SW ICD Defined in Doc No.: FPL-IC1214-01-CRS. • CRISA Design Proposal dated 2/12/99 available. • Documents to be available in the near future are listed in this report. Herschel PACS SPU - IAC

  3. SPU OVERVIEW Herschel PACS SPU - IAC

  4. SPU MECHANICAL ASSEMBLY (1) Herschel PACS SPU - IAC

  5. SPU MECHANICAL ASSEMBLY (2) Herschel PACS SPU - IAC

  6. SPU UNIT BUDGETS Herschel PACS SPU - IAC

  7. SPU INSTRUMENT INTERFACES Herschel PACS SPU - IAC

  8. SPU COMMUNICATIONS INTERFACES Herschel PACS SPU - IAC

  9. SPU S/C INTERFACES Herschel PACS SPU - IAC

  10. SPU INTERCONNECTING DIAGRAM Herschel PACS SPU - IAC

  11. SPU FUNCTIONAL SUBUNITS • SWL AND LWL SPU PROVIDE THE HW AND START-UP SW FOR REDUCTION AND COMPRESSION OF THE SHORT AND LONG WAVE DETECTORS DATA. • PSU CONVERTS THE S/C PRIMARY VOLTAGE TO SECONDARY VOLTAGES REQUIRED BY THE SPU. • DAU PROVIDES A SET OF SPU ANALOG HK DATA TO DEC/MEC UNIT Herschel PACS SPU - IAC

  12. SPU FUNCTIONAL BLOCK DIAGRAM Each CPU board includes: • One DSP working at 18 MHz (TBC) • One 32 KW x 48 Boot PROM bank • Three EDAC protected SRAM memory banks: • Up to 256 KW x 48 for Program RAM • Up to 128 KW x 32 for Data RAM • Up to 512 KW x 32 for exp. of Data RAM • One EDAC protected up to 256 KW x 48 EEPROM memory bank. • Three IEEE1355 DS links including one common 8KWx32 Dual Port RAM buffer • Two PSC ASICs including: • Watchdog, OBT and 32 bit Timers. • EDAC logic and Interrupt management. • Programmable Address decoding and Wait State generator. • One Auxiliary Board Interface • One Mother Board Interface Each CPU board executes its own specific Start Up and Application Software. Herschel PACS SPU - IAC

  13. SPU MEMORY ORGANIZATION NOT IMPLEMENTED (TBC) X Herschel PACS SPU - IAC

  14. START-UP SW • Both SWL-SPU and LWL-SPU contain their own separate but identical PROM SW activated simultaneously during the switch-on of the SPU. • The SPU_SUSW will communicate with the DPU_ASW through a IEEE 1355 link, where the DPU_ASW is the master, sending commands and the SPU_SUSW, the slave, executing the commands and sending responses. CONTEXT DIAGRAM Herschel PACS SPU - IAC

  15. START-UP SW MAIN FUNCTIONS • Shall initialise the unit at power-on or under a software reset. • Shall perform a self-test to check the health of the unit • Shall configure and initialise the IEEE-1355 link to communicate with the DPU_ASW. • Shall allow to load and dump programs and data segments into/from memory • Shall allow to start the application software and giving it the control. • Shall leave the units for the application software in a well known configuration. Herschel PACS SPU - IAC

  16. LOW-LEVEL SW DRIVERS • The LLSWDRV library include functions, to be used by the application SW, to allow access to the hardware devices of the unit. • The library will be provided as source code modules of functions which will be compiled/linked with the application SW. Herschel PACS SPU - IAC

  17. START-UP SW SWITCH ON PROCEDURE • Both LWL-SPU and SWL- SPU have the same switch-on procedure. • Both sub-units share the same PSU, being booted by the CDMS at the same time. • Is up to the DPU_ASW to proceed first with one or the other. Herschel PACS SPU - IAC

  18. SPU LIMITED FUNCTIONAL TEST (LFT) • LFT OBJECTIVE: To check that the SPU performs as specified in a representative operational environment of the PACS SPU Application SW. • MAIN CHARACTERTERISTICS OF THE LFT ARE: • An application SW developed under Virtuoso shall be executed on the SPU. • The application shall communicate through the 1355 links with the “DPU and DECMEC simulators”. • LLSWDRV functions shall be linked with the application SW. • The application SW shall be loaded in the same way as the real SPU application. • The same application shall be executed in the SWL-SPU and LWL-SPU Herschel PACS SPU - IAC

  19. SPU TEST SET-UP FOR LFT (1) Herschel PACS SPU - IAC

  20. SPU TEST SET-UP FOR LFT (2) Herschel PACS SPU - IAC

  21. SPU TEST SET-UP FOR LFT (3) Herschel PACS SPU - IAC

  22. SPU MODEL PHILOSOPHY (1) Herschel PACS SPU - IAC

  23. SPU MODEL PHILOSOPHY (2) CANCELLED Herschel PACS SPU - IAC

  24. CRITICAL/PROBLEM AREAS • IMPORTANT ROTATION ON CRISA’S (NOW ASTRIUM) PERSONNEL HAS AFFECTED TO THE PROJECT AND, IN PARTICULAR, TO THE FOLLOWING AREAS: • COMPONENTS PROCUREMENT AND, • TECHNICAL MANAGEMENT. Herschel PACS SPU - IAC

  25. CRISA STATUS(JANUARY PROGRESS REPORT ATTACHED) Herschel PACS SPU - IAC

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