more structure for the code

diff --git a/s-curves/scurve.sh b/s-curves/scurve.sh
index c48f6b3d7dd7d124f26d8b04dbd841a0a367f9ee..0607c72cbdba692049b788c0d7981817a2552149 100755 (executable)
--- a/s-curves/scurve.sh
+++ b/s-curves/scurve.sh
@@ -1,15 +1,17 @@
 #!/bin/bash
 
+## Uncomment the following line to debug this script:
 #set -x
 
-echo
-echo   "   "Usage: ./scurve_new2.sh [ELab/Vacuum] [Number of Runs] [Step Size]
-echo
+### ------------ Interpret the command line arguments ------------
 
-if [ -z "$1" ]  # check if second parameter is empty
+usage () { echo -e "\nUsage: ./scurve_new2.sh [ELab/Vacuum] [Number of Runs] [Step Size]\n"; }
+
+if [ -z "$1" ]  # check if first parameter is empty
 then
+  usage
   echo Error: Specify the system! Use Vacuum or ELab as first parameter.
-  exit -1;
+  exit -1
 fi
 
 if [ $1 == 'ELab' ]
@@ -58,11 +60,15 @@ else
 fi
 
 
+### ------------ setting up the sensor ------------
 
 # trbcmd w $trbaddr 0x8002 0xaaa0aaa0 # set sensor ID for sensor 0
 # trbcmd w $trbaddr 0x8402 0xbbb0bbb0 # set sensor ID for sensor 1
 trbcmd w $trbaddr 0x8006 0x1 # set testmode
 
+
+### ------------ start data taking ------------
+
 echo Bank A
 for i in `seq 0 $stepsize 255`
 do