Driver Station Backend

[matthew-reynolds]

Pull Request

Added most of the backend code required to make the application functional. The most substantial missing features of this PR compared to a theoretically completed DS are joystick support and ROS topic pub/sub.

Summary of changes:

• Add data containers for all UI elements to interact with. ROS sub/pubs will also interact with this data.
  • This includes stuff like enabled/disabled/estop, teleop/autonomous/test, event name, match number, alliance, etc
• Add logic for the connection indicators (ie. connected to radio, to robot, etc)
• Add logic for the PC battery & CPU usage indicators
• Add logic and timing for practice mode
  • Set timing based on user input
  • Cycle through the modes with the desired sequence
  • Optionally enable sound effects
• Add logic for the Reboot roboRIO and Restart Robot Code buttons
• Add logic for the main status string (No Robot Communications, Teleop Disabled, etc)

What's not included:

• Joystick support
• ROS topic subscribers and publishers
• Persistent data (Saving team number, practice timing, etc between instances)
• Full firewall detection support
• USB connection detection (Currently, plugging in directly to the RIO over USB shows up as ethernet)
• Missing a few sound effects (Countdown blip and disable robot effect)
• Display whether the PC is charging

Contribution Checklist

• [x] I have read the contributing guide.
• [ ] I have referenced relevant issues.
• [x] I have labeled accordingly.
• [x] I have detailed my changes as much as possible.

Change Checklist

• [ ] I have added tests.
• [x] I have added necessary documentation.
• [x] I have auto formatted using clang-format or yapf.