Skip to content
master
Switch branches/tags
Go to file
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

README.md

Power, Display, and UI Management Daemon for DIY Raspberry Pi Tablet

PiTabDaemon is a background process for monitoring and controlling the state of a Raspberry Pi based tablet, as described here (http://www.stefanv.com/electronics/a-compact-home-made-raspberry-pi-tablet.html). It performs the following functions, once per millisecond unless otherwise noted:

  • checks for a shutdown signal from the power switch and initiates a proper shutdown.

  • monitors the three buttons and performs the corresponding actions:

    • bring keyboard (short press) or dashboard (long press) to front
    • increase brightness by 1/8 (short press) or to maximum (long press)
    • toggle foreground application between normal and maximized (short press) or full screen (long press)
  • monitors commands from the dashboard (every 5 seconds):

    • enable/disable screen dimming on idle when on battery power
    • enable/disable USB and Ethernet ports
    • enable/disable Wi-Fi and Bluetooth
  • power monitoring:

    • status of PowerBoost 1000C charging and charge-completed indicators
    • battery voltage
    • estimate of energy remaining
    • information is written to a tiny RAM disk for display by dashboard
  • monitors X11 idle time (at varying intervals depending on need):

    • dims display to half of selected brightness after 2 minutes of inactivity
    • turns off backlight completely after 5 minutes
  • monitors PowerBoost 1000C LBO and performs an immediate shutdown if triggered.

The daemon makes use of the following open source libraries and utilities:

  • bcm2835 - low level GPIO library used to monitor buttons, voltage, etc.
  • libxss and xscreensaver - allows the daemon to monitor user idle time.
  • wmctrl - command line utility used by the daemon to resize windows.

PiTabDaemon is intended to be used in conjunction with PiTabDashboard (https://github.com/svorkoetter/PiTabDashboard).

About

Power management daemon for Raspberry Pi based tablet.

Resources

License

Releases

No releases published

Packages

No packages published