GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 GLAST Large Area Telescope: Electronics, Data Acquisition & Instrument Flight Software Flight.

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Presentation transcript:

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 GLAST Large Area Telescope: Electronics, Data Acquisition & Instrument Flight Software Flight Software II Dan Wood Naval Research Laboratory (202) Gamma-ray Large Area Space Telescope

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 LAT Flight Software FSW II V1 2 Boot Boot Document: LAT-TD Boot Resources: Boot Proceeds In Two Stages –Primary Boot (from on-board SUROM) –Secondary Boot (from EEPROM on SIB board) CPU Crate RAD750SIB Reserved for Secondary Boot (Managed by TFFS software) EEPROM Bank 0 (Managed by TFFS software) EEPROM Bank communications to spacecraft (SIU only) SUROM (256 kByte) 750 Processor Bridge Chip SDRAM (128 MByte) LCB LCB communications to SIU Discrete I/O

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 LAT Flight Software FSW II V1 3 Primary Boot CPU Reset from SUROM –Run EMC initialization procedure –Set initial watchdog timeout –Map out SDRAM, SUROM and PCI I/O spaces –Enable processor L1 caches –Disable interrupts Memory Test SDRAM –Memory test (all 0’s, all 1’s, checkerboard) (runs from ROM/cache) Start Primary Boot Shell (now using RAM resources) –Configure PCI bus –Configure 1553 device (SIU) or LCB device (EPU) –Go into command loop (  ) Initial command timeout for automatic start Poll for new commands Send housekeeping telemetry Reset watchdog timer

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 LAT Flight Software FSW II V1 4 Primary Boot Memory Map PurposeStart Address Boot Stack 0x Boot Diagnostics Region 0x0000FF80 Second Stage Boot RAM Module 0 0x Second Stage Boot RAM Module 1 0x VxWorks RTOS Load Region 0x File Upload Buffer 0x Boot Program Data Variables 0x I/O Output Buffer 0x I/O Input Buffer 0x Boot Memory Heap 0x LCB Input Ring Buffer 0x EEPROM Boot Region 0xC SUROM 0xFFF00000

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 LAT Flight Software FSW II V1 5 Primary Boot Command Processing Startup SIANCILLARY Packet Received Last HKP Packet Sent Timeout - No Command Message Received Operational Command Packet Received SIANCILLARY Packet Received Command Start Telecommand Received Last HKP Packet Sent Upload Packet Received RTOS Execute Command Poll 1553 Remote Terminal Prepare Next HKP Telemetry Packet Record Time Information Parse Operational Command Load and Execute RTOS Parse Upload Packets Poll 1553 Remote Terminal / Initial Command Timeout Initializati on

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 LAT Flight Software FSW II V1 6 Primary Boot Commands APIDFunction CodeDescription 0x640 0Boot Start. Removes the primary boot code from the initial timeout and allows further operational telecommands or file uploads for the primary boot code to take place. 1Boot Reset. Forces a reset of the primary boot code into a known restart state. 2Boot Memory Dump Start. Start a dump of memory into the HKP telemetry by the primary boot code. 3Boot Memory Dump Cancel. Cancels a primary boot code memory dump that is in progress. 4Boot Error Dump. Dump the value of a queued error word by the primary boot code. 5Boot RTOS Execute. Begins execution of an RTOS image and the second stage boot process. APIDFunction CodeDescription 0x641 0File Upload Start. Announces the beginning of a new upload and provides total size and packet count. 1File Upload Cancel. Cancels an outstanding upload set. 2File Upload Commit. Writes the upload data to the final storage destination. 3File Upload Data. Actual file upload data packet string. Operational Commands Upload commands

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 LAT Flight Software FSW II V1 7 Secondary Boot Secondary Boot Functions –Inflate (ZLIB algorithm) VxWorks image to prepared memory location –Branch to VxWorks entry point –Execute secondary boot script to run application code Inflate (ZLIB algorithm) and link application code modules from EEPROM Call application initialization functions –The system is running!

GLAST LAT ProjectDOE/NASA Peer Review, March 19-20, 2003 LAT Flight Software FSW II V1 8 Boot Status Development environment at NRL –Prototype version RAD750 –JTAG programming environment –Engineering version SIB (access to 1553 and EEPROM) Boot Code Progress Code BlockLanguageLOC estimatedLOC writtenComment Reset and Exception VectorsASM400200Estimate based on existing TCPU-603 code Memory TestASM1000Coded in ASM to carefully control memory accesses Boot ShellC10000Estimate based on ICM boot shell source code 1553 driver (polled)C400 Done (part of CO1553 package) LCB driver (polled)C4000Analogous to 1553 polled mode driver EEPROM driverC10050Estimate based on existing TCPU-603 flash memory driver PCI driverC3000Estimate based on the BAE RAD750 PCI boot driver CCSDS packet libraryC400 Done (CCSDS package) Upload parserC10000Estimate based on ICM memory loader ZLIB file inflatorC1700 Done (ZLIB is public domain software … just packaging) Boot utilitiesC200100Take from OSKIT (FreeBSD) - ~100% code reuse LAT utilitiesC400350Subset of package PBS (BSWP, SPIN) – 90% complete