Making the crc16 calculation a function.

onslauth · Mar 30, 2013 · 8a264e6 · 8a264e6
1 parent 98e69a5
commit 8a264e6
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/crc16-table.sh b/crc16-table.sh
@@ -2,6 +2,9 @@
 
 # For testing purposes, an input of "123456789" should produce a crc of 0xBB3D
 
+function calc_crc16( )
+{
+
 poly=0x8005
 
 declare -a crc_16_table=(     
@@ -51,7 +54,10 @@ do
 	crc=$(( crc_16_table[ ( crc ^ buf ) & 0xff ] ^ ( crc >> 8 ) ))
 done
 
-echo "crc: $crc"
-printf "crc: 0x%04X\n" $crc
+printf "%04x" $crc
+
+}
 
+crc16=$( calc_crc16 "$1" )
+echo "crc16: $crc16"