/MSCB ODB tree: Difference between revisions

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<div style="column-count:4;-moz-column-count:4;-webkit-column-count:4">
The midas documentation has moved. See [https://midas.triumf.ca/docs/develop/reference/reference/odb_keys/#mscb /MSCB] on the ODB keys page and [https://midas.triumf.ca/docs/develop/features/acquiring_data/slow_control/mscb/ Slow control: MSCB] for the new documentation about the /MSCB ODB keys.
* [[Midas_documentation|Midas Documentation]]
* [[Feature_listing|Feature Listing]]
* [[Application_listing|Application Listing]]
* [[Online_Database|Online Database]]
</div>
 
= Links =
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* [[mhttpd |MIDAS web server (mhttpd)]]
* mhttpd [[MSCB Page]]
</div>
 
= Purpose =
The <span style="color:purple; font-style:italic;">/MSCB</span> ODB tree contains data for the  MSCB (MIDAS Slow Control Bus) system.
This tree is optional, and only required if the MSCB system is in use. Provided MSCB support has been [[MSCB Page|built in]] to [[mhttpd]], the data from this tree is displayed on the [[MSCB Page]].  
 
 
= Creating the /MSCB tree =
The <span style="color:purple; font-style:italic">/MSCB</span> ODB tree is an optional tree that may be [[ODB#Creating ODB keys|created by the user]], but they are also created automatically by [[mhttpd]] if the  <span style="color:purple; font-style:italic;">/MSCB/Submaster</span> key is not present in the ODB. In this case, the equipment list is scanned, and all MSCB devices and addresses are collected from locations such as
; <span style="color:purple; font-style:italic;">/Equipment/<name>/Settings/DD/<name>/MSCB Device</span>
which is the location for MSCB submasters used by the mscbdev.c and mscbhvr.c device drivers (found in the midas package at path
../midas/drivers/device). Once the tree is created, it will not be touched again by [[mhttpd]] (unless  <span style="color: #444444; background-color: #CCCCCC; font-style:italic; font-size: 90; padding:0.25em;
padding-left: 0.5em;padding-right: 0.5em;border:1px solid #808080;border-radius: 5px;margin-bottom:1px;">Rescan</span> on the [[MSCB Page]] is pressed) so devices can be removed or [[ODB#Reorder ODB keys|reordered]] by hand.
 
 
= Example =
The following example using the [[odbedit]] command <span style="color:saddlebrown; font-style:bold; ">"ls"</span> command shows the /MSCB ODB tree from the Deap experiment. This data is displayed on the [[MSCB Page#Introduction|MSCB Page]]. 
 
[local:deap:Stopped]/>ls -l /MSCB/Submaster/mscb520
Key name                        Type    #Val  Size  Last Opn Mode Value
---------------------------------------------------------------------------
Pwd                            STRING  1    32    31h  0  RWD
Comment                        STRING  1    32    31h  0  RWD  SCBs
Address                        INT    28    4    31h  0  RWD
                                        [0]            0
                                        [1]            1
                                        [2]            2
                                        [3]            3
                                        [4]            4
                                        [5]            5
                                        .................
                                        [27]            27
Node comment                    STRING  28    32    31h  0  RWD
                                        [0]            aaa
                                        [1]            bbb
                                        [2]            DEAPCOND410
                                        [3]            DEAPCOND410
                                        [4]            DEAPCOND410
                                        [5]            DEAPCOND410
                                        ...........................
                                        [27]            DEAPCOND410
       
= Keys in the /MSCB tree =
 
== <span style="color:purple; font-style:italic">Submaster</span> subtree ==
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* '''Type:''' DIR
</div>
The <span style="color:purple; font-style:italic">Submaster</span> subtree contains  one or more <span style="color:purple; font-style:italic"><submaster-name></span> subtree(s) for the MSCB submasters present in the system.
 
<br>
---------
<br>
 
=== <span style="color:purple; font-style:italic"><submaster-name></span> subtree ===
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* '''Type:''' DIR
* '''Default:'''
</div>
The <span style="color:purple; font-style:italic"><submaster-name></span> subtree contains information for one of the MSCB submaster(s) present in the system. There will be a <span style="color:purple; font-style:italic"><submaster-name></span> subtree for each MSCB submaster present.
 
<br>
---------
<br>
 
==== <span style="color:purple; font-style:italic">Pwd</span> ====
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* '''Type:''' STRING [32]
* '''Default:'''
</div>
This key in the [[#<submaster-name> subtree|<submaster-name> subtree]] may contain an optional password needed by that submaster. Leave blank if no password.
 
<br>
---------
<br>
 
==== <span style="color:purple; font-style:italic">Comment</span> ====
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* '''Type:''' STRING [32]
* '''Default:'''
</div>
This key in the [[#<submaster-name> subtree|<submaster-name> subtree]] may contain an optional comment describing that submaster.
 
<br>
---------
<br>
 
==== <span style="color:purple; font-style:italic">Address</span> ====
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* '''Type:''' INT Array
* '''Default:'''
</div>
This key in the [[#<submaster-name> subtree|<submaster-name> subtree]] is a variable-length array containing the node addresses for that submaster. The length of the array is determined by the number of nodes present.
 
<br>
---------
<br>
 
==== <span style="color:purple; font-style:italic">Node comment</span> ====
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* '''Type:''' STRING[32] Array
* '''Default:'''
</div>
This key in the [[#<submaster-name> subtree|<submaster-name> subtree]]is an optional variable-length array that may contain a comment for each node. The length of the array is determined by the number of nodes present.
 
<br>
---------
<br>
 
[[Category:ODB Tree]]

Latest revision as of 22:00, 30 October 2026

The midas documentation has moved. See /MSCB on the ODB keys page and Slow control: MSCB for the new documentation about the /MSCB ODB keys.

Retrieved from "https://daq00.triumf.ca/MidasWiki/index.php?title=/MSCB_ODB_tree&oldid=3657"