Changeset 1815

Timestamp:

06/23/03 22:57:49 (10 years ago)

Author:

peglags

Message:

(marius) added some comments.

Files:

• lm-sensors/trunk/prog/pwm/fancontrol (modified) (4 diffs)

lm-sensors/trunk/prog/pwm/fancontrol

@@ -42 +42 @@
 function LoadConfig {
         echo "Loading configuration from $1 ..."
-        #grep configuration from file
+        # grep configuration from file
         INTERVAL=`egrep '^INTERVAL=.*$' $1 | sed -e 's/INTERVAL=//g'`
         FCTEMPS=`egrep '^FCTEMPS=.*$' $1 | sed -e 's/FCTEMPS=//g'`
@@ -55 +55 @@
                 exit 1
         fi
+        # here the other settings should be verified
+        
 
-
+        # write settings to arrays for easier use and print them
         echo
         echo "Common settings:"
         echo "  INTERVAL=$INTERVAL"
                                                 
-        #write values to arrays
         let fcvcount=0
         for fcv in $FCTEMPS
@@ -97 +98 @@
 fi
 
-function calc () { awk "BEGIN { print $@ }"; }
+# function doing all the math
+function calc () {
+        awk "BEGIN { print $@ }"
+}
 
+# main function
 function UpdateFanSpeeds {
         let fcvcount=0
-        while (( $fcvcount < ${#AFCPWM[@]} ))
+        while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
         do
                 #hopefully shorter vars will improve readability:
@@ -124 +129 @@
                 
                 if (( $tval <= $mint ))
-                  then pwmval=0
+                  then pwmval=0 # at specified mintemp shut fan off
                 elif (( $tval >= $maxt ))
-                  then pwmval=255
+                  then pwmval=255 # at specified maxtemp switch to 100%
                 else 
+                  # calculate the new value from temperature and settings
                   pwmval=`calc "((10/(${maxt}-${mint})*(${tval}-${mint}))^2/1000*(${maxt}-${mint})*(255-${minso})+${minso})" |cut -d'.' -f1`
-                  if (( $pwmpval == 0 )) # if fan was stopped, start it
-                  then
+                  if (( $pwmpval == 0 ))
+                  then # if fan was stopped start it using a safe value
                         echo $minsa > $pwmo
                         sleep 1
                   fi
                 fi
-                echo $pwmval > $pwmo
+                echo $pwmval > $pwmo # write new value to pwm output
                 fcvcount=$fcvcount+1
         done
 }
 
+# main loop calling the main function at specified intervals
 while true
 do