Delete a few obsolete text files
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Andrew Johnson
127
DEMO
127
DEMO
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First run a pvAccess test server (portable channel access server equvivalent) by
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running ./runTestServer in another terminal (or in background).
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pvget, pvput and eget utilities are delivered by pvAccessCPP (caget and caput equvivalents).
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They are located in pvAccessCPP/bin/$EPICS_HOST_ARCH directory.
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1. Get the value of a V4 scalar PV
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----------------------------------
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> pvget testValue
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testValue 0
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2. Put the value of a V4 scalar PV
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----------------------------------
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> pvput testValue 1.23
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Old : testValue 0
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New : testValue 1.23
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3. Get the value of a V4 array PV
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----------------------------------
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> pvget testArray10_1
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testArray10_1 10 0 1 2 3 4 5 6 7 8 9
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4. Put the value of a V4 array PV
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----------------------------------
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> pvput testArray10_1 3 11 22 33
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Old : testArray10_1 10 0 1 2 3 4 5 6 7 8 9
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New : testArray10_1 3 11 22 33
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5. Get the values of all the fields of V4 record (-r is pvAccess request string)
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--------------------------------------------------------------------------------
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> pvget -r 'field()' testValue
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testValue
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epics:nt/NTScalar:1.0
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double value 1.23
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alarm_t alarm
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int severity 0
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int status 0
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string message
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time_t timeStamp
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long secondsPastEpoch 0
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int nanoseconds 0
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int userTag 0
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display_t display
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double limitLow 0
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double limitHigh 0
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string description
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string format
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string units
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control_t control
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double limitLow 0
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double limitHigh 0
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double minStep 0
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valueAlarm_t valueAlarm
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boolean active false
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double lowAlarmLimit 0
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double lowWarningLimit 0
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double highWarningLimit 0
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double highAlarmLimit 0
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int lowAlarmSeverity 0
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int lowWarningSeverity 0
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int highWarningSeverity 0
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int highAlarmSeverity 0
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double hysteresis 0
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6. Get the values of some fields of V4 record (-r is pvAccess request string)
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--------------------------------------------------------------------------------
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> pvget -r 'field(value,timeStamp,alarm)' testValue
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testValue
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structure
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double value 1.23
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time_t timeStamp
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long secondsPastEpoch 0
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int nanoseconds 0
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int userTag 0
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alarm_t alarm
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int severity 0
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int status 0
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string message
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6. Monitor the value of a V4 scalar PV
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--------------------------------------
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> pvget -m testCounter
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testCounter 406
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testCounter 407
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testCounter 408
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testCounter 409
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^C
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7. Get a NTMatrix and print as a matrix
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---------------------------------------
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> eget -a columns=3 -a rows=5 -s testNTMatrix
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0.677423 0.456543 0.11271
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1.31041 1.10541 1.64136
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2.41162 2.11947 2.01143
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3.06775 3.67029 3.55055
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4.0458 4.71389 4.38239
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8. Get a NTMatrix and print its transponse matrix
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-------------------------------------------------
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> eget -a columns=3 -a rows=5 -T -s testNTMatrix
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0.677924 1.66402 2.42248 3.8881 4.22758
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0.874961 1.20251 2.56682 3.21442 4.92651
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0.47145 1.65475 2.4864 3.79319 4.80394
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9. Get a NTTable and print as a table
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-------------------------------------
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> eget -a columns=3 -s testNTTable
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column0 column1 column2
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0.6783 1.62252 2.48407
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0.188775 1.72518 2.72885
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0.740506 1.11392 2.75991
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0.679227 1.58597 2.80799
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0.775342 1.3701 2.83385
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0.164793 1.19263 2.52135
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0.680618 1.46619 2.29619
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0.152323 1.28396 2.98274
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0.0926253 1.44459 2.96131
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0.753354 1.23773 2.66854
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10
TODO
10
TODO
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- opt) connection validation message sends max paylaod size
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- readSize checks if size is in limits of size_t?
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// should be called without any lock hold
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// TODO in Java as in C++ ? reportChannelStateChange();
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- improve searching of channel with server address specified
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- complete authNZ (callback on right change)
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- request event on disconnect/destroy, etc.?
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@ -1,26 +0,0 @@
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# pvAccessCPP: ca provider
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2018.10.05
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Editors:
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* Marty Kraimer
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**ca** is a channel provider **ca** that is implemented as part of **pvAccessCPP**.
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It uses the **channel access** network protocol to communicate with a server,
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i. e. the network protocol that has been used to communicate with **EPICS IOCs** since 1990.
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A description of **ca** is provided in
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[caProvider](https://mrkraimer.github.io/website/caProvider/caProvider.html)
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Provider **pva** is another way to connect to a **DBRecord**,
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But this only works if the IOC has **qsrv** installed.
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**qsrv**, which is provided with
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[pva2pva](https://github.com/epics-base/pva2pva),
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has full support for communicating with a **DBRecord**.
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The only advantage of **ca** is that it does require any changes to an existing IOC.
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@ -1,3 +0,0 @@
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get libstdc++ tag file from
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https://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/libstdc++.tag
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