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#!/bin/bash
#############################################################################
#Bash script to dump the fuse bits for AVR microcontrollers and open
#the Engbedded Atmel AVR Fuse Calculator with the current fuse settings.
#
#05-Nov-2009
#Craig Heffner
#http://www.hackingwithgum.com
#############################################################################
LFUSE=lfuse
HFUSE=hfuse
EFUSE=efuse
URL="http://www.engbedded.com/cgi-bin/fcx.cgi?P=MMCU&V_LOW=$LFUSE&V_HIGH=$HFUSE&V_EXTENDED=$EFUSE&O_HEX=Apply+values"
ADSUCCESS=OK
ADOK=0
FUSE=""
DATA=""
ADARGS=""
#Loop through all the arguments to the script and concatenate them into $ADARGS.
#These arguments get passed directly to avrdude.
while [ $# -ne 0 ]
do
#If this argument is -p, then the next one is the chip name
if [ "$1" == "-p" ] && [ "$2" != "" ]
then
URL=$(echo $URL | sed -e "s/MMCU/$2/")
fi
ADARGS="$ADARGS $1"
shift
done
#Does the user need usage help?
if [ "$ADARGS" == "" ] || [ "$ADARGS" == "-h" ] || [ "$ADARGS" == "--help" ]
then
echo ""
echo "Usage: $0 -c <programmer> -p <partno>"
echo ""
echo -e "\tExample: $0 -c usbtiny -p ATmega8"
echo ""
echo -e "Note that the argument supplied to -p is case-sensitive.\nIt should look exactly as it does in the Engbedded Web site's select box.\n"
exit
fi
#Dump fuse info with avrdude and loop through the output word by word
for WORD in $(avrdude $ADARGS -q -U lfuse:r:-:i -U hfuse:r:-:i -U efuse:r:-:i 2>&1)
do
#Check for the success indicator
if [ "$WORD" == "$ADSUCCESS" ]
then
ADOK=1
fi
#Look for keywords "lfuse", "hfuse", or "efuse". They appear
#just before the corresponding fuse values are displayed.
if [ $(echo $WORD | grep $LFUSE) ]
then
FUSE=$LFUSE
elif [ $(echo $WORD | grep $HFUSE) ]
then
FUSE=$HFUSE
elif [ $(echo $WORD | grep $EFUSE) ]
then
FUSE=$EFUSE
fi
#Have we seen one of the fuse keywords?
if [ "$FUSE" != "" ]
then
#Displayed fuse values start with a colon
DATA=$(echo $WORD | grep -e "^:")
if [ "$DATA" != "" ]
then
#Pull out the fuse byte; 9th and 10th characters in the displayed value
DATA=${DATA:9:2}
#Display the fuse value and update the Engbedded URL with the value
echo -e "$FUSE\t0x$DATA"
URL=$(echo $URL | sed -e "s/$FUSE/$DATA/")
#Clear these in order to look for the next fuse
FUSE=""
DATA=""
fi
fi
done
#If there was an error, let the user know.
#Else, open the Engbedded URL.
if [ $ADOK -ne 1 ]
then
echo "Avrdude failed! Check your programmer and chip arguments."
else
#Show the URL
#echo $URL
#Open the URL automatically
firefox $URL &
fi
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