Subversion Repositories svnkaklik

#!/bin/sh 
prg="adude"
#
help()
{
        echo "prg_fusebit_uc -- read and write fuse bits of the atmega8"
        echo ""
        echo "Usage: prg_fusebit_uc [-hu] -r|-w Freq"
        echo ""
        echo "OPTIONS: -h this help"
        echo "         -r read fuse bytes"
        echo "         -u use uisp instead of avrdude"
        echo "            avrdude can automatically detect dapa or avrusb500."
        echo "            uisp can only be used with the parallel port dapa."
        echo "         -w write fuse bytes such that a given Freq is used"
        echo "            a frequency of 0 means external crystal. Possible"
        echo "            values are 0,1,2,4,8"
        echo ""
        echo "EXAMPLE: program the fuses to 4MHz internal"
        echo "         prg_fusebit_uc -w 4"
        echo ""
        echo "Warning: you can not undo the setting \"external crystal\" unless"
        echo "         you have a crystal that works."
        echo "This script can be easily adapted to different programmer types"
        exit 0
}
while [ -n "$1" ]; do
case $1 in
    -h) help;shift 1;;
    -u) prg="uisp";shift 1;;
    -r) opt_r="1";shift 1;;
    -w) opt_w="1";freq="$2";shift 2;;
    -*) echo "error: no such option $1. -h for help";exit 1;;
    *)  break;;
esac
done

if [ -z "$opt_r" -a  -z "$opt_w" ];then
        # one of those options is mandatory
        help
fi

hf=0xd9
if [ "$opt_w" = "1" ]; then
        case $freq in
            0) lf=0xee;echo "Make sure you have a crystal otherwise you can not change this!";sleep 2;;
            1) lf=0xe1;;
            2) lf=0xe2;;
            4) lf=0xe3;;
            8) lf=0xe4;;
            *) echo "error: no such frequency, -h for help";exit 1;;
        esac
fi


if [ "$prg" = "uisp" ]; then
        if [ "$opt_r" = "1" ];then
                set -x
                uisp -dlpt=/dev/parport0 -dprog=dapa --rd_fuses
                set +x
                echo "Explanation: Fuse Low Byte: 0xe1 (1MHz intern), 0xe3 (4MHz intern), "
                echo "             0xe4 (8MHz intern)"
                echo "             Fuse High Byte should be 0xd9"
                exit 0
        fi
        if [ "$opt_w" = "1" ]; then
                set -x
                uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_l=$lf
                uisp -dlpt=/dev/parport0 -dprog=dapa --wr_fuse_h=$hf
                set +x
                exit 0
        fi

fi
if [ "$prg" = "adude" ]; then
        if grep "Vendor=0403 ProdID=6001" /proc/bus/usb/devices > /dev/null ; then
                prg="avrusb500"
        else
                prg="dapa"
        fi
        if [ "$opt_r" = "1" ];then
                set -x
                avrdude -p m8 -c $prg -v -q
                set +x
                echo "Explanation: Fuse Low Byte: 0xe1 (1MHz intern), 0xe3 (4MHz intern), "
                echo "             0xe4 (8MHz intern)"
                echo "             Fuse High Byte should be 0xd9"
                exit 0
        fi
        if [ "$opt_w" = "1" ]; then
                set -x
                avrdude -p m8 -c $prg -u -v -U lfuse:w:$lf:m
                avrdude -p m8 -c $prg -u -v -U hfuse:w:$hf:m
                set +x
                exit 0
        fi
fi