VME DAQBox

This software package describes software designed to interface with a VME DAQBox to readout CDT Cascade detectors and interface with mgmarino/VMELinux.

The C++ libraries interface with libHardwareLib (from CDT), allowing configuration and readout with JSON. This is then exported to a web interface using autobahn and a corresponding web server is run using crossbar.io.

Build/Installation

The Makefile (at top level) needs to be edited to give the path to libHardwareLib and the associated header files. Then simply:

./configure
make

should be enough to build the files. After this, one can also start a crossbar server to begin the web and web socket servers:

crossbar start
make

This is of course assuming crossbar is installed. At this point, one should be able to connect to the server: http://ip_of_sbc:8080. Also, one can look at this jsfiddle to see an example how to build a web interface with display, etc. Note that the jsfiddle also uses as default server 10.155.59.160, which should work if the SBC in cluster is running.

A full screen version of the example is available here.

Overview

The code here works to essentially convert HardwareLib structs to JSON objects to enable passing them across a web interface (or from a python instance). The following structs are convertible/converted to/from JSON:

CFConfig
CFSimulation
CFStatistics
CFDiagnostics
HSetup
ChannelList
MConfig

SBC Code

Code to run the card is available on the CASCADE detectors SBC image here. This script to start the program as a runit daemon looks simply like:

#!/bin/sh

exec sudo -u daq \
   /usr/bin/crossbar start \
   --cbdir /home/daq/VMEDAQBox/.crossbar \
   --logdir /home/daq/VMEDAQBox/.crossbar/log