+ Implemented backlight control

case/backlight.py

+#!/usr/bin/python
+
+###
+###  @brief  Script for accessing the display's backlight
+###
+
+import RPi.GPIO as GPIO
+
+# Configuration
+backlight_channel = 16
+
+# Function for accessing the backlight
+def init():
+        # Adviced by the library...
+        GPIO.setwarnings( False )
+
+        GPIO.setmode( GPIO.BCM )
+        GPIO.setup( backlight_channel, GPIO.OUT )
+
+def enable():
+        init()
+        GPIO.output( backlight_channel, GPIO.HIGH )
+
+def disable():
+        init()
+        GPIO.output( backlight_channel, GPIO.LOW )
+
+# If the script is executed directly...
+if __name__ == '__main__':
+        import sys
+
+        en = None
+        if len(sys.argv) == 2:
+                if sys.argv[1] == 'on':
+                        en = True
+                elif sys.argv[1] == 'off':
+                        en = False
+
+        if en is None:
+                print( 'Usage: %s <state>' )
+                print( '' )
+                print( 'Parameters:' )
+                print( '  state: Either "on" or "off" to enable/disable the backlight' )
+                print( '' )
+                sys.exit( 1 )
+
+        if en:
+                enable()
+        else:
+                disable()

case/backlight.sh

@@ -8,13 +8,13 @@ while true; do
         if xset -q | grep "Monitor is On" >/dev/null 2>&1 ; then
                 if [ "$MONITOR_ACTIVE" != true ]; then
                         MONITOR_ACTIVE=true
-			#echo Monitor just switched on
+                        python /opt/backlight.py on
                         xset led named "Scroll Lock"
                 fi
         else
                 if [ "$MONITOR_ACTIVE" = true ]; then
                         MONITOR_ACTIVE=false
-			#echo Monitor just switched off
+                        python /opt/backlight.py off
                         xset -led named "Scroll Lock"
                 fi
         fi