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134 kaklik 1
#!/bin/sh 
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prg="adude"
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#
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help()
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{
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	echo "prg_fusebit_uc -- read and write fuse bits of the atmega8"
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	echo ""
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	echo "Usage: prg_fusebit_uc [-hu] -r|-w Freq"
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	echo ""
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	echo "OPTIONS: -h this help"
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	echo "         -r read fuse bytes"
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	echo "         -u use uisp instead of avrdude"
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	echo "            avrdude can automatically detect dapa or avrusb500."
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	echo "            uisp can only be used with the parallel port dapa."
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	echo "         -w write fuse bytes such that a given Freq is used"
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	echo "            a frequency of 0 means external crystal. Possible"
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	echo "            values are 0,1,2,4,8"
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	echo ""
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	echo "EXAMPLE: program the fuses to 4MHz internal"
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	echo "         prg_fusebit_uc -w 4"
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	echo ""
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	echo "Warning: you can not undo the setting \"external crystal\" unless"
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	echo "         you have a crystal that works."
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	echo "This script can be easily adapted to different programmer types"
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	exit 0
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}
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while [ -n "$1" ]; do
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case $1 in
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    -h) help;shift 1;;
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    -u) prg="uisp";shift 1;;
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    -r) opt_r="1";shift 1;;
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    -w) opt_w="1";freq="$2";shift 2;;
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    -*) echo "error: no such option $1. -h for help";exit 1;;
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    *)  break;;
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esac
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done
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if [ -z "$opt_r" -a  -z "$opt_w" ];then
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	# one of those options is mandatory
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	help
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fi
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hf=0xd9
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if [ "$opt_w" = "1" ]; then
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	case $freq in
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	    0) lf=0xee;echo "Make sure you have a crystal otherwise you can not change this!";sleep 2;;
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	    1) lf=0xe1;;
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	    2) lf=0xe2;;
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	    4) lf=0xe3;;
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	    8) lf=0xe4;;
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	    *) echo "error: no such frequency, -h for help";exit 1;;
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	esac
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fi
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if [ "$prg" = "uisp" ]; then
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	if [ "$opt_r" = "1" ];then
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		set -x
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		uisp -dlpt=/dev/parport0 -dprog=dapa --rd_fuses
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		set +x
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		echo "Explanation: Fuse Low Byte: 0xe1 (1MHz intern), 0xe3 (4MHz intern), "
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		echo "             0xe4 (8MHz intern)"
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		echo "             Fuse High Byte should be 0xd9"
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		exit 0
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	fi
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	if [ "$opt_w" = "1" ]; then
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		set -x
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		uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_l=$lf
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		uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_h=$hf
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		set +x
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		exit 0
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	fi
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fi
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if [ "$prg" = "adude" ]; then
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	if grep "Vendor=0403 ProdID=6001" /proc/bus/usb/devices > /dev/null ; then
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		prg="avrusb500"
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	else
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		prg="dapa"
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	fi
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	if [ "$opt_r" = "1" ];then
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		set -x
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		avrdude -p m8 -c $prg -v -q
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		set +x
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		echo "Explanation: Fuse Low Byte: 0xe1 (1MHz intern), 0xe3 (4MHz intern), "
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		echo "             0xe4 (8MHz intern)"
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		echo "             Fuse High Byte should be 0xd9"
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		exit 0
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	fi
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	if [ "$opt_w" = "1" ]; then
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		set -x
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		avrdude -p m8 -c $prg -u -v -U lfuse:w:$lf:m
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		avrdude -p m8 -c $prg -u -v -U hfuse:w:$hf:m
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		set +x
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		exit 0
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	fi
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fi