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-------------------------------------------------------------------------------
GPIB
-------------------------------------------------------------------------------
This is an example capture of some GPIB traffic on an HP 1631D LA/scope.
Details:
http://www.rudiswiki.de/wiki9/SigrokDecoderGPIB
https://github.com/rudi48/sigrok-gpib
Logic analyzer setup
--------------------
The logic analyzer used was a Saleae Logic16 clone (at 500kHz):
Probe GPIB
-------------------
0 DIO1
1 DIO2
2 DIO3
3 DIO4
4 DIO5
5 DIO6
6 DIO7
7 DIO8
8 EOI
9 DAV
10 NRFD
11 NDAC
12 IFC
13 SRQ
14 ATN
15 REN
Data
----
The following is happening on the GPIB bus in this capture:
- Controller sets the GPIB to UNLISTEN and UNTALK (neutral state)
- Controller sets device with GPIB address number 4 to LISTEN
- Controller sends command 'ID LF+EOI' to device with GPIB address number
4 (request identity string)
- Controller sets the GPIB to UNLISTEN and UNTALK (neutral state)
- Controller sets device with GPIB address number 4 to TALK
- Device with GPIB address number 4 sends the ID string 'HP1631D+EOI' to
controller
- Controller sets the GPIB to UNLISTEN and UNTALK (neutral state)
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