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The BACKPRESS PV is mapped to signal 1064: StatusLinePressure. That signal is reported with values 0xfffe. The correct signal is 1101: FlowBlockBackPressure which is reported with a more realistic value 28 (mbar).

The stream-protocol support works when there is only one CS800 controller on the subnet. When there are multiple controllers, it is not certain to which controller the support will attach. It may even receive all of status packets broadcast on the subnet.

Write a sequence program to receive the status broadcasts and filter packets from the desired controller by ID (SetUpControllerNumber, parameter 1028). The simulator has been adjusted so a command-line parameter can set the controller ID of the simulator instance.

With this change, all CS800 controllers can be controlled from a single IOC (as described in a feature request to the asyn module). The default would attach to any controller, assuming that only one controller is running on the subnet. This could be checked using ID broadcast traffic on the UDP port 30303. Those broadcasts only include IP and MAC address but that could be enough. Better for the support to require controller ID to be specified and matched.

This work can follow merge of #28 so as not to delay further that PR.

The ip module does not use the typed rset from EPICS base. This adds some extra deprecation warnings:

In file included from /epics/base-7.0.7/include/dbAccess.h:20:0,
                 from ../devXxStrParm.c:14:
/epics/base-7.0.7/include/dbBase.h:164:5: warning: ‘rset’ is deprecated (declared at /epics/base-7.0.7/include/recSup.h:68) [-Wdeprecated-declarations]
     rset            *prset;

for example.

This error occurs on the iocsh:

tyGSAsynInit("serial1",  "UART_0", 0, 9600,'N',1,8,'N',"\n","\n")
serial.cmd line 21: Illegal integer 'N'

But it doesn't occur on the vxWorks shell:

tyGSAsynInit("serial1",  "UART_0", 0, 9600,'N',1,8,'N',"\n","\n")
value = 0 = 0x0

The edl files are in op/edl/autoconvert and the opi files are in op/opi/autoconvert. Should the ui files be in op/ui/autoconvert, or are these manually tweaked? I would like to add the op/Makefile so we can automatically convert in the future when new files are added or medm files are edited. But first I want to have the ui files in the correct location.

The Keithley 2000 state machine has a buffer overflow problem.

The string “pvname” overflows into “close_format”, which occurred during the for loop within the “monitor_mode_change “ state if your PV names are over 40 characters, the limit of characters for the “string” type.

add support for the Oxford CryoStream 800 cooler

• #28 - get status from specified controller
• #29 - identify source of status values 0xFFFE and 0xFFFF
• #30 - support screens
• #31 - backpressure signal
• #32 - CS800 python simulator

Where should examples for how to use the streamDevice support in the ip module reside? streamDevice isn't required to build ip, so the example IOC doesn't currently include streamDevice support.

make an additional screen plotting temperature vs. time for last hour

Controls for the Oxford CS800 receive status updates every second as UDP broadcasts from the controller on port 30304. There is an assumption that only one controller is broadcasting on the subnet. When there are two (or more controllers), the status of each controller will be fed to the EPICS PVs from the stream protocol.

Need to differentiate which controller owns the status packet received and filter out the status updates from the other (unwanted) controllers.

The UDP packet has the IP number in the header block while the controller number is in the data block.

Can the stream protocol match the controller ID with a desired value?

Initial users (they always win, don't they) want pressure reported in mbar like the instrument panel shows (not bar).

A simulator for the Oxford CS800 controller has been developed in a separate repository (https://github.com/prjemian/cs800sim). Bring that simulator into this repo, under ipApp/op/python/Oxford_CS800_sim/.

I'm having trouble finding an example IOC in IP or XXX directories.
Is it possible to add a woring example IOC to the ip/iocsh directory?

while setting up caQtDM screens for 7-BM, found this to be a problem:

• /APSshare/epics/synApps_5_7/support/ip330-2-7/ip330App/op/ui/Ip330Scan.ui, macro: P=7bma1:,R=IP330_
• /APSshare/epics/synApps_5_8/support/ip330-2-8/ip330App/op/ui/Ip330Scan.ui, macro: P=7bmb1:,R=IP330_
• bounding box on title is too small
• in the .adl file, widen the box to span the width of the top row and center the value
• reconvert to various formats
• copy revised .ui file to /APSshare

add example screen shots to documentation

The controller is showing many wrong values from the status broadcast. Stream protocol problem or unexpected value from controller in status broadcast?