https://github.com/dehann/ppar

https://github.com/dehann/ppar

Last synced: about 1 month ago
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• Host: GitHub
• URL: https://github.com/dehann/ppar
• Owner: dehann
• License: mit
• Created: 2014-07-11T21:02:15.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-07-14T03:25:05.000Z (over 10 years ago)
• Last Synced: 2023-08-12T14:27:40.245Z (over 1 year ago)
• Language: Python
• Size: 172 KB
• Stars: 0
• Watchers: 6
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE

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README

        
PPAR

====

Basically an LCM wrapper for querying values from a json file. The initial purpose of this little project is to standardize parameter distribution amount multiple projects.

Write your parameters in human readible json file format, point the pparService.py at this file and querying the json file will be available over LCM. This prevents me from hardcoding parameters over and over in several scirps or projects -- especially in different languages.

At present there is little error checking and robustness built into this code -- will be added as dependcy on ppar grows in the future.

Dependencies

------------

::

    sudo apt-get install cmake python

    

MIT LCM must also be installed:

::

    cd ~/Downloads

    wget http://lcm.googlecode.com/files/lcm-1.0.0.tar.gz

    tar xzf lcm-1.0.0.tar.gz

    cd lcm-1.0.0

    ./configure

    make -j

    sudo make install

    sudo ldconfig

    

    

Installing

----------

To get the code:

::

     cd ~

     git clone https://github.com/dehann/PPAR.git

     cd PPAR

     mkdir build

     cd build

     cmake ..

     make

Python path variable must include

::

     

     ??/PPAR/build/include/lcmtypes/ppar

     and the lcm functions, please see LCM documentation

     

Running the service

-------------------

At present the python program runs directly from in src directory, which isn't great, but this has been a quick turnaround little project -- more later...

::

     

     cd PPAR/src

     python pparService.py ??/some_param_file.json

The json file

-------------

At minimum, the json file should include the LCM channel names with which requests and replies will be sent. For example, you'll see data/example.json has at least:

::

    

    {

      "ppar" : {

        "lcm" : {

          "reply-channel" : "PPAR_REPLY_EXAMPLE",

          "request-channel" : "PPAR_REQUEST_EXAMPLE"

        }

      }

    }