SCUBA2 DATA ACQUISITION SYSTEM

1
SCUBA2 DATA ACQUISITION SYSTEM

• Xiaofeng Gao
• Dennis Kelly
• UK ATC
• 19/June23/June 2006

2
DA PC inside JAC structure
JOCS
FTS
RTS
RTSC
Polarimeter
SMU
SCUMOMO-2
TCS
DA PCs
MCEs
ENVIRO
WVM
3
Interface between DA PC system and others
Drama command
MCE command
RTS Client
Sc2da Drama task
MCE
Sdsu_driver
PCI
reply
data frame / command reply
bigphysarea
Sc2dadh Task
Drama parameter
processed and raw data frame gt NDF file
Data storage disk
Other.. ..
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SCUBA2 DATA ACQUISITION (DA) PCOS and additional
hardware

• Operation software
• -Red Hat 9 shrike-i386-disc1(2,3).iso
• -RTAI rtai-24.1.13.tgz
• -Kernel linux-2.4.20.tar.gz
• -Bigphysarea patch bigphysare-2.4.20.tar.gz
• (considering)
• Fedora Core 5
  FC-5-i386-dis1(,2,3,4,5).iso
• RTAI rtai-3.3
• Kernel linux-2.6.15
• Bigphysarea patch
  bigphysarea-2.6.15
• Additional Hardware
• SDSU PCI card
• -DSP Motorola DSP56301
• -fibre optic link speed 250 MHz at 10 bits per
  byte, for a net speed of 25 Mbyte/sec
• -PCI bus speed 33 MHz at 32-bits per transfer
• -memory on the board 24 Mbytes

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SCUBA2 DA Layout
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DA software Outline
MCE/PCI commands
Drama Command/ reply
Sc2da Drama task
Sdsu_driver
reply/ data frame available
MCE/PCI Command/ Reply/data frame
Drama parameter
data frame ready
ready to write NDF
acquired data frame
Shared Memory
QL data ready
Recalled data frame
Bigphysarea
Sc2dadh Task
Memory
Save data frame
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DA drama actions

• sc2da_Abort, 0, 0, 0, 0,
  0, "ABORT",
• sc2da_Config, sc2da_ConfigKick, 0, 0, 0,
  0, "CONFIGURE", kick not implemented
• sc2da_Exit, 0, 0, 0, 0,
  0, "EXIT" ,
• sc2da_Help, 0, 0, 0, 0,
  0, "HELP" ,
• sc2da_Init, sc2da_initKick, 0, 0, 0,
  0, "INITIALISE", kick not implemented
• sc2da_Ping, 0, 0, 0, 0,
  0, "PING" ,
• sc2da_SetSeq, sc2da_SetSeqKick, 0, 0, 0,
  0, "SETUP_SEQUENCE",
• sc2da_Seq, sc2da_SeqKick, 0, 0, 0,
  0, "SEQUENCE",
• sc2da_Report, 0, 0, 0, 0,
  0, REPORT, not implemented
• sc2da_Test, 0, 0, 0, 0,
  0, TEST", not implemented
• ///
  ///
• sc2da_Servo, 0, 0, 0, 0,
  0, "SERVO",
• sc2da_Batch, 0, 0, 0, 0,
  0, "MCEBATCHGO",
• sc2da_Trkheat, sc2da_trkKick, 0, 0, 0,
  0, "MCETRKHEATER",
• sc2da_Version, 0, 0, 0,
  0, 0,"DASVERSION",
• sc2da_MceStatus, 0, 0, 0,
  0, 0,"MCESTATUS",
• sc2da_Mcecmd, 0, 0, 0, 0,
  0, "MCECMD",
• sc2da_Downld2PCI, 0, 0, 0, 0,
  0, "DWLOADDSP" , // only PCI

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SCUBA2 DA Driver
Get Version-Info
SDSU Driver
Send MCE Command
Send PCI Command
Handle unsolicited message
Application
SDSU PCI
Transfer data frame
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SCUBA2 DA Driver outline
LINUX USER SPACE
buffer address recycle
MCE command /reply
Version Info/ driver error message
PCI command /reply
SDSU structure
data frame
RTAI LINUX
User fifo handler
Data thread
PCI thread
MCE thread
Memory for Mce cmd
Shared memory For Kernel/ application
Bigphysarea
Memory for mce reply
DMA
DMA data frame
SDSU PCI