?????? (Communication)

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??????(Communication)
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A. ? ?

• ?? ???? LabVIEW? ??? ??? ??? ?? ?? ?? ??? ????.
• LabVIEW?
• Serial I/O,
• GPIB I/O,
• VISA I/O
• ? ???? ??? ?? ???.
• LabVIEW?? ???? instrument ????

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B. Serial ??

• Serial ??? ???? ?? ?? ?? ??? ?? ??? ??? ?? ?? ??
  ??.
• serial ??? 1?? 1bit? ???? receiver? ???? ??
  transmitter? ????. ? ??? ??? ?? ??? ???? ???? ?
  ??? ????? ? ? ??.
• Serial ??? ??? 1?? serial??? 1?? device?? ??.
• ?? ?? ??? string???? ???? ?? ?? ???? ????? ??.
  ???? ?? ??? carriage return, line feed, semicolon
  ?. ?? ??? ????? ?? ??? ??.

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LabVIEW? Instrument I/O? Serial ?????? serial ??
??? ??? ???? ????

• ??? serial ??? ??? ??? ???.
• Flow control? handshaking ???? ??.
• Buffer size? VI? ???? ??? ?? ?? ??.
• Port number? ??? ???? ??.
• Baud rate, data bit, stop bit, parity? ??? ???
  ???? ??
• port number? ???? serial ??? string(??? ???)? ??

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• port number? ???? serial ??? ?? buffer? byte??
  byte count? ????.
• port number? ???? serial ????? requested by
  count? ??? ???? ???? ???

• ? Serial ????? ???? ?? ??.
• 1. ?? Serial Port Init VI? serial ??? ???.
• 2. Serial Port Write VI? ??? ??? ???? ??.
• 3. Bytes at Serial Port VI? ??? serial ?? ??? ??
  ??? ??? ?? ??.
• 4. ?????, Serial Port Read VI? ???? ????? ????
  ???.

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C. IEEE 488 (GPIB) ??

• GPIB ?????? 488.2 VI? ??? GPIB VI? ????.
• GPIB 488.2 VI? LabVIEW? IEEE 488.2 ???? ?????.
• ?? VI? National Instruments? NI-488.2?????? IEEE
  488.2? ????. ???, ???? ??? GPIB VI? ???.
• GPIB? ?? ??? ?? ? ?? ??? ??? ???? ??. ?? GPIB?
  ???? ??, ??? ??, ?? ??? ? ?? ???? ??.
• 1970?? ?? HP? General Purpose Interface
  Bus(GPIB)? ??, 1975?? IEEE? ???, GPIB? IEEE 488
  ???? ???.
• GPIB, HP-IB, IEEE 488?? ??? ?? ?.
• GPIB? 24?? ???? ????parallel bus. 8?? ????, 5??
  ?? ?? ?(ATN, EOI, IFC, REN, SRQ), 3?? handshake?,
  8?? ???? ??? ??.
• GPIB? 8?? parallel, byte serial, asynchronous ???
  ?? ??? ??. ?? ???? ?? ???? ????? handshake?? ????
  ?? ??? ?? ?? ?? ??? ????? ??.
• GPIB?? ???? ??? byte(8 bit)??, ???? ??? ASCII
  string?? ????.

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• ??? ??? ???? ??? 3??.
• 1. ?? ?? ???? ???, GPIB? ??? ???? ???? ????
  ?(EOI)? ???? ?.
• 2. ??? ?? end-of-string(EOS)? ??? ???? ???? ?.
  ?? ??? EOI ?? EOS? ?????, EOI? EOS? ?? ??.
• 3. Listener? handshake?? ???? ??? ??? ???? ? ????
  ?.
• ??? ?????? ??? ?? ??? 030??? ??? GPIB????? ???
  ??? ??.
• ????? ???? 0? GPIB ????? ??? ??. GPIB??? ?? ??
  ??? ???? 130? ??.
• GPIB? ??? ???? ? ?? ????(???)? ????.
• ?? ?? ???? ???? ??? ???? ??? ????? 1?? Talker? 1?
  ??? Listener? ????.
• ??? string? ??? ?? Talker??? Listener?
  handshake??. LabVIEW? GPIB VI? ????? ????? ????
  ???? ?? ?? ??? ????.

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• GPIB VIs
• LabVIEW? GPIB??? ?? ?? ?? ?? VI? Instrument ????
  GPIB? GPIB 488.2 ?? ???? ????. ?? VI? Low-level
  488.2 ????? ???.
• ???? GPIB?? ????? ?? ????? string? ???? ?? ???
  ??????.
• ??? ???? GPIB Write? GPIB Read.

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• Data string? address string? ???? GPIB??? ??.
• Mode? GPIB write? ???? ??? ??.
• ??? timeout ms?? ???? ??? ? ??? ????.
• Error In? Error Out cluster? ??? ???? ?? error
  handler VI? ?? ????.
• Status? 16-element Boolean array? ? ??? GPIB
  ????? ??? ??.
• ?? GPIB Write VI? string VDCMEAS1?? GPIB
  address? 2? ??? ??.
• mode(0)? timeout ms(25000)? ????? ??.

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• ??? address string???? byte count? ?? ??? ?? ????
  ???. ??? ?? ?? ???? ?? byte count? ?? mode? ??? ?
  ??. ?? ???? data string?? ??.
• ? GPIB Read VI? ???? 2? ?? ????? 20???? ????
  ??. mode(0)? time-out ms(25000)? ???? ??.

• GPIB Read VI? ??? ?? ?? ? ???? ???? ??.
• (1) VI? ??? ??? ?? ?? ?? ??,
• (2) VI? ??? ??? ??,
• (3) VI? time limit? ??? ??,
• (4) VI? END??(EOI asserted)? ??? ??,
• (5) VI? end of string (EOS)? ??? ??

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???? GPIB VI? ???? GPIB??? ??

• ?? GPIB ?? ??? ???? VI? ???.
• ??? GPIB VI ? GPIB write? GPIB read? ??.
• ??? idn?? IEEE 488.2 ?? ?? ???? ????. ? ????
  ???? ??? identification string? ????.

??? ??
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• 1.File???? New? ???? ??? Panel? ??.
• 2.?? ?? ?? Panel? Control? indicator? ???.
• ?? Control? indicator? ?? ??????? pop-up? ??
  Create Control ?? Create Indicator ? ??? ?? ?? ?
  ??.
• 3.Write Data string? idn?? ??. Read Byte Count
  numeric ????? 100? ??.

?? ?????
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• 1.Diagram Window? ??.
• 2.??? ?? ?? ?????? ????.
• GPIB Write??(Instrument I/O GPIB ?? ???) ???
  string? GPIB ?? ??? ??.
• GPIB Read??(Instrument I/O GPIB ?? ???) GPIB
  ?? ????? ???? ???.
• General Error Handler VI(Time Dialog ?? ???) ?
  VI? ?? cluster? ????, ?? ??? ????? dialog box?
  ????.
• 3.??? ??? ?? VI? ??.
• Identification string ?? Read Data? ?? ??? ??.
• ?? ???? ?? ??? GPIB ??, EABO ?? error6? ????. ??
  ?? ??? idn????? ???? ???? ????.
• ??? ???? ?? ?? ?? ??? ???? ????.

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D. VISA

• VISA? Virtual Instrumentation Software
  Architecture.
• VISA? VXI, GPIB, RS-232, ?? ??? ??? ?? LabVIEW?
  ???? ??? ????? ????.
• VISA? VXIplug play System Alliance? ????, 35??
  ?? ?? ????? ???? ?? ?? ????.
• VISA ??? ??? instrument I/O ??? ???? ?????? ????
  ??? ? ?? ???? ? ??? ??? ??? ???.
• ?? ???? Function ???? Instrument I/O? VISA ??
  ???? ??.
• ???? VISA ????? ??? VISA session ??? ??. VISA
  session? ??? ??? Path and Refnum ?? ???? ??.

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• VISA session? ??? session? ?? identifier??.
• ??? VI? ?? ??? ???? I/O? ?? ?? ??? ??
  configuration ??? ????.
• VISA session? VISA Open ????? ????? VISA
  primitive ??? ?? ????.
• VISA Open ??? ?? VISA ??? session? ????.
• ?? ????? ???? ??? file I/O ???? ???? file refnum?
  ????.
• VISA session? ????? Instr class.
• VISA session? pop-up?? class? GPIB Instr, Serial
  Instr, VISA/GPIB-VXI RBD Instr, Generic Event,
  Trigger Event, VXI Signal Event, Resource Manager
  ??? ??? ? ??.
• ???? VISA?? VISA Open, VISA Write, VISA Read,
  VISA Close? ??? ??.

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• VISA Open ? Resource Name? VISA session(for
  class)? ???? ??? device? ??? ??.
• ? ??? session identifier? VISA session? ???? ??
  device? ?? ??? ? ? ????.
• Resource Name? I/O ?????? ??? ?? ???? ??? ???? ??

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?? ??? ???? ??

• GPIB ??? ????? GPIB keyword? ??.
• Embedded ?? MXIbus ????? ?? VXI ??? VXI keyword?
  ??.
• GPIB-VXI ????? GPIB-VXI keyword? ??.
• Asynchronous serial? ????? ASEL keyword? ??.

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• VISA Open? primary ???? 2? ?? ??? GPIB ??? ?? ??
  GPIB20INSTR? instrument descriptor
  string? ??
• VISA Write? write buffer string ?? VISA session?
  ???? ??? ??. dup VISA session?? ??? handle ?? ??.
  
• UNIX?? ???? synchronously?? ????, ?? ??? ????
  ???? asynchronously?? ????.
• return count? ?? ??? ??? ?.

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• VISA Read? VISA session? ???? ????? data? ???.
• byte count ? ?? data? ??? ?? ? ?? read buffer?
  ??.
• dup VISA session?? ??? handle ?? ??.
• UNIX?? ???? synchronously?? ????, ?? ??? ????
  ???? asynchronously?? ????.
• return count? ?? ??? ??? ?
• VISA Close? VISA session? ???? ??? close.

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VISA VI? ???? GPIB/Serial ??? ??

• ? ?? VISA write? VISA read ?? VISA VI? ???? ??
  ??(GPIB ?? Serial)? ??.
• ??? idn?? ???? GPIB ?? serial ??? ??? ? ??, ?
  ???? ??? identification string? ??.
• ??? VISA ??? Fluke 45? ???? ????

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• 1.??? Panel? ?? ?? ?? ???.
• VISA session ???? ??? ???? Path Refnum ?? ????
  ??. ?? ????? ????? VISA Open ??? pop-up?? ?? ??
  ?? ? ??.
• 2.Resource Name ???? ??? ?? string ??? ??.
• ????? 2? GPIB ?? GPIB20INSTR
• COM1? ??? serial?? ASRL1INSTR
• Note VISA Open ??? Online Help? ???? ???
  Resource Name ???? ? ? ??.
• 3.Write string Contrl? idn?? ??. Byte
  Control?? 100? ??.

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• 1.????? ???? ??.
• 2.?? ??????? ?? ?? ???.
• VISA Open ??(Instrument I/OVISA ?????)
  communica-tion session? ?? VISA session refnum?
  ??.
• VISA Write ??(Instrument I/OVISA ?? ???) ???
  string? ??? ??? ??.
• VISA Open ??(Instrument I/OVISA ?? ???) ???
  ????? ???? ???.
• VISA Open ??(Instrument I/OVISA ?? ???) ???
  VISA session? ??.
• 3.??? ??? ?? VI? ??.
• VISA session ???? INSTR? ???? ??? ??. ??? ?????
  VISA session ???? pop-up? ? VISA class? ??.
• Resource name ??? ?? ?? serial ?? GPIB ??? ??.
• 4.VI? VISA. vi? ???? ??.

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E. LabVIEW? Instrument ????? ??

• Instrument ????? ??? ?? ??? ???? S/W? ???.
• LabVIEW? instrument ????? ???? ?????.
• ??? ??? ?? ??? ??? ??? ???? ??? ? ??.
• ??? ???? ?? ?? ?? ???? ??.
• ?? ???? ???? ???? Instrument ????? ?? SubVI? ??
  Sub VI? ??? ? ??.
• Instrument ???? Templates
• LabVIEW example directory? ?? VISA instrument
  ???? template VI? LabVIEW? EXAMPLES ?INSTR
  ?INSTTMPL ?.LLB ?????? ????.
• ??? ?? ???? ?? ???? instrument ???? VI??,
  instrument ????? LabVIEW? ??? ? ???? ????.
• Instrument ????? ????? ? ? LabVIEW instrument
  ???? template VI? ??? ???? ??. Template VI?? ??
  instrument ???? ??? ???? ??, ? VI? ??? ??? ????
  ?? ???? ????.

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F. LabVIEW? ????? ??? Instrument ????

• HP34401A Getting Started instrument ????.
• ?? HP34401A Multimeter? ?? ??? ? VI? ??? ? ??.
• LabVIEW? EXAMPLES ?INSTR ?HP34401A.LLB?? HP34401A
  Getting Started VI? ??.
• HP34401A Getting Started VI? instrument ???? ??
  VI.
• VI? ??? ??? ???? ??? ??? ????.
• Help???? Show Help? ???? Help ???? ??.
• HP34401A Getting Started VI? ??? ???? ??? ????
  indicator? ????? ? ??? ??? ? ? ??.
• instrument ????? ????? ??? ? documentation? ??
  ????.
• High-level VI? ?? ??? configure??? ?? ? ??? ? ??.
  ?? VI? HP34401A? ?? ?? instrument ???? ?? VI??
  ???? ??. ?? ?? VI? ?? ??? ?? VISA? ????.

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??? Instrument ????? ??

• ?? 3-2?? ?? VISA.VI? ??? Instrument ????? ??.
• ?? ??? VISA.VI? ??? ???.
• ??? ??
• 1. ?? ??? VISA.VI? ??.
• 2. ??? ??? ???? ???.

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• ?? ?????
• 1. Diagram Window? ??.
• 2. ?? ?? Diagram Window?? ?? ??? ??.
• Edit ???? Create SubVI? ??.? SubVI? ??.

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• 3. ????, ?? ?? ?? ?? ??? ???? Edit ???? Create
  SubVI? ??.

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• 4. ?????, ??? ??? ???? Edit???? Create SubVI? ??.
  
• 5.???? instrument SubVI? ?????, ??? SubVI ???? ??
  ???? Instrument Initialize .vi, Instrument
  Application. Vi, Instrument Close. vi? ??
  Seminar.llb? ????

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• Note ?? VI? ????? ???? ???, ??? ?? ?? ??? Icon
  Editor? ??. ?? ??? ???? pop-up?? Icon Editor?
  ???? ??

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• 6. Instrument ???? SubVI? ?? ? Seminar.llb? ????,
  SubVI? ?? ???? ???? ??? ??? ?? ??.
• 7.??? ??? ?????. Resource Name string ????
  GPIB20INSTR? ????. VI? ????.
• ?? 2? ?? GPIB???? ?? ???, 2? ??? GPIB????? ???.
• ????? ?? ???? ??? Write Buffer string ???? ??.
• 8.VI? Instrument driver.vi? ???? ????.