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The Rulbus LabVIEW Library

The Rulbus LabVIEW Library provides an easy-to-use interface for controlling a simple peripheral input-output bus, designed for use with PC ISA and EPP interfaces. This library features several Virtual Instruments (VIs) for module management, and examples include setting DAC voltage and configuring the Rulbus interface. With capabilities for addressing multiple devices (up to 3810 addresses), the library enables straightforward integration of peripherals such as ADCs and DACs. Learn to implement Rulbus in your LabVIEW projects with detailed examples and a robust structure.

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The Rulbus LabVIEW Library

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  1. 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

  2. The Rulbus LabVIEW Library • Rulbus, a simple peripheral input-output bus • Structure of the library • Application example • Implementation of the library

  3. Rulbus: a simple peripheral input-output bus computer PC PC, ... interface ISA Rulbus interface EPP Rulbus interface R u l b u s peripheral ADC DAC delay timer 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

  4. Rulbus components • computer – Rulbus interface • Rulbus rack • Rulbus modules • Rulbus rack selector

  5. Computer – Rulbus interface E P P R u l b u s i n t e r f a c e

  6. Rulbus rack H a l f w i d t h r a c k

  7. 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

  8. Rulbus Rack Selector (1) Selector located at rear of rack The figure above shows a rack with secondary address 3: binary 0011, 0*2^3 + 0*2^2 + 1*2^1 + 1*2^0

  9. 15 14 0 Rack Rack Rack Rulbus rack selector (2) Computer + Rulbus Interface or always selected module address: [rack:address]

  10. 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

  11. Structure of the library • Several VIs for each module • Contents VI for each module • Overall library Contents VI

  12. Application example (1) • Set the named DAC to specified voltage

  13. Application example (2) • Specify Rulbus Interface • EPP: prompt>set rulbus=epp,0x378 (this is the default) • ISA: prompt>set rulbus=isa,0x200 • Specify Rulbus Configuration file • contents of environment variableRULBUS_CONFIG_FILE, or • file .\rulbus.conf (current directory), or • file C:\etc\rulbus.conf

  14. Application example (3) • Specify Rulbus devices # rulbus-small.conf - example rulbus configuration file. rack "top" { # rack definition address = 0 # this rack’s 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 } }

  15. 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

  16. References & Links ELD:http://www.eld.LeidenUniv.nl/ RLL:http://www.eld.LeidenUniv.nl/~moene/software/rll/ RDL:http://www.eld.LeidenUniv.nl/~moene/software/rdl/ RDCL:http://www.eld.LeidenUniv.nl/~moene/software/rdcl/

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