The Rulbus LabVIEW Library

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The Rulbus LabVIEW Library

• Martin J. Moene
• U n i v e r s i t e i t L e i d e n
• Last update 1 December 2004

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The Rulbus LabVIEW Library

• Rulbus, a simple peripheral input-output bus
• Structure of the library
• Application example
• Implementation of the library

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Rulbus a simple peripheral input-output bus
PC
PC, ...
computer
ISA Rulbus interface
EPP Rulbus interface
interface
R u l b u s
ADC
DAC
delay timer
peripheral
R u l b u s r a c k
R i j k s U n i v e r s i t e i t L e i d e n
B u s
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Rulbus components

• computer Rulbus interface
• Rulbus rack
• Rulbus modules
• Rulbus rack selector

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Computer Rulbus interface
E P P R u l b u s i n t e r f a c e
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Rulbus rack
H a l f w i d t h r a c k
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Rulbus module
R B 8 5 0 6 d u a l p a r a l l e l i n t e
r f a c e
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Rulbus Rack Selector (1)
Selector located at rear of rack
The figure above shows a rack with secondary
address 3 binary 0011, 023 022 121
120
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Rulbus rack selector (2)
Computer Rulbus Interface
or
always selected
module address rackaddress
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Several Rulbus properties

• 8-bit address bus, 254 addresses per rack 1)
• rack selector, address 00,
• bus idle, address FF
• modules use 2 .. 32 addresses (DAC, Parallel
  Interface)
• 8-bit data bus
• 1 MHz bus frequency
• simple interface for peripherals
• 1) With rack selector total of 15 x 254, or 3810
  addresses

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Structure of the library

• Several VIs for each module
• Contents VI for each module
• Overall library Contents VI

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Application example (1)

• Set the named DAC to specified voltage

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Application example (2)

• Specify Rulbus Interface
• EPP promptgtset rulbusepp,0x378 (this is the
  default)
• ISA promptgtset rulbusisa,0x200
• Specify Rulbus Configuration file
• contents of environment variable
  RULBUS_CONFIG_FILE, or
• file .\rulbus.conf (current directory), or
• file C\etc\rulbus.conf

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Application example (3)

• Specify Rulbus devices

rulbus-small.conf - example rulbus
configuration file. rack "top" rack
definition address 0 this racks
address rb8509_adc12 "adc" ADC with
default settings rb8510_dac12 "dac-ch0"
DAC first output address 0xD0
rb8510_dac12 "dac-ch1" DAC second output
address 0xD2 bipolar false voltperbit
1.25m
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Implementation of the library

• Rulbus LabVIEW Library (RLL), uses the
• Rulbus Device Library (RDL), a dynamic-link
  library
• Rulbus Device Class Library (RDCL), part of RDL

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References Links

• ELD http//www.eld.LeidenUniv.nl/
• RLL http//www.eld.LeidenUniv.nl/moene/softw
  are/rll/
• RDL http//www.eld.LeidenUniv.nl/moene/softw
  are/rdl/
• RDCL http//www.eld.LeidenUniv.nl/moene/softw
  are/rdcl/