GEARS/8pi LN2 system code
Maintainer: Jonathan Williams
Code for running the liquid nitrogen system at the SFU NSL.
The program is split into LN2_master and LN2_server components, each in their own directories. All of the program logic as well as the DAQ hardware interface lies in the LN2_server program. Once the LN2_server program is running, it will listen for commands which may be sent from the LN2_master program.
These are some of the commands which the LN2_master program can use to control the LN2_server program while it is running.
| Command | Description |
|---|---|
./LN2_master begin |
Begins the run. The LN2 filling process will occur based on the schedule defined in schedule.dat. |
./LN2_master end |
Ends the run. If currently filling, ends the filling process. |
./LN2_master fill detector_name |
Starts the dewar filling process immediately for the detector with name detector_name defined in schedule.dat. |
./LN2_master on X |
Manually turns on the DAQ switch X, where X is an integer (from 0 to 7 on the NIDAQ controller). |
./LN2_master off |
Manually turns off all DAQ switches, closing all valves. |
./LN2_master measure X |
Shows the voltage reading on DAQ channel X, where X is an integer (from 0 to 7 on the NIDAQ controller). |
./LN2_master table |
Prints recent sensor data in a table format. |
./LN2_master exit |
Ends the run and exits the LN2_server program. |
Use make to compile in both the master and server directories. The NIDAQmxBase library is needed to use the (default) nidaq controller for the LN2_server. This configuration has been tested using g++ and GNU make on Scientific Linux/CentOS 7.
The LN2_server may also be compiled with a 'test' controller using make LN2_server_test which can be used for testing since it doesn't interface with DAQ hardware (and therefore doesn't rely on external libraries). This configuration has been tested using g++ and GNU make on Ubuntu 16.04.