Proton Calorimetry/User Interface

Uploading Data to HEP Server

Data can be uploaded to the HEP cluster in order to run a webpage with live photodiode data.

• On your local machine:
  • Move to the directory containing photodiode data being saved by CoolTerm and the C++ script to generate the CSV file: cd /Path/To/Data
  • Generate the photodiode data with: root -l "writeCSV.cpp"
  • In a new terminal, move to the same directory and run the following command in order to copy this data, line by line, to the plus1 web area: tail -F -n 1 output.csv | ssh username@plus2.hep.ucl.ac.uk -T 'cat - > /unix/www/html/pbt/PDdisplay/photodiodeValuesAll.csv'
• On plus2 :
  • In a new terminal, move into the directory where the photodiode data is written: cd /unix/www/html/pbt/PDdisplay/
  • Run the following script in that directory: ./outputSingleLine.sh -v photodiodeValuesAll.csv photodiodeValues.csv 0.02
    • This will output a single line CSV file - photodiodeValues.csv - every 10ms (100Hz). It's a good idea to set the write rate about 2x faster than the desired frame rate.
  • To output this any more or less often, adjust the "waitTime" value at the end (needs to be in seconds).
  • To stop displaying each line as it is written, remove the -v flag.
  • Note that this script contains an infinite loop, so to stop it running you need to kill it by hand with Ctrl-C. You may need to do this a few times to get it to quit...