#!/bin/bash
TMPDIR=/run/tmpfiles.d

# How frequent to update the output.
#.01 second=10000
# .1 second=100000
#  1 second=1000000
UPDATE_RATE=100000

# Enable if you want some alternate values displayed (where available)
# Throttle valve, automatic double-clutch gears
SHOW_ALTERNATES=1

# Here (flag1 through flag3) you can quickly put in a hexadecimal
# message ID and have all the logic flow through so that you can
# extract the variable and see if you can make use of it.
# See the matching code segment at the end of this script.

flag1="025"
flag2="027"
flag3="02B"

echo "0000" > /$TMPDIR/0AB
echo "023#FFFF" > /$TMPDIR/023
echo "F" > /$TMPDIR/358
echo "000001" > /$TMPDIR/3D2
echo "00" > /$TMPDIR/232
echo "0000000000000000" > /$TMPDIR/$flag1
echo "0000000000000000" > /$TMPDIR/$flag2
echo "0000000000000000" > /$TMPDIR/$flag3
echo "000000000" > /$TMPDIR/07B
echo "000" > /$TMPDIR/079
echo "000000000000" > /$TMPDIR/322

LATEST=0
cat $1 | egrep " 023#| 079#| 07B#| 232#| 340#| 358#| 3D2#| 322#| 122#| 0AB#| $flag1#| $flag2#| $flag3#" | while read a b c
do

case "$c" in

$flag1#*) echo "${c:4:16}" > /$TMPDIR/$flag1 ;;
$flag2#*) echo "${c:4:16}" > /$TMPDIR/$flag2 ;;
$flag3#*) echo "${c:4:16}" > /$TMPDIR/$flag3 ;;
079#*)    echo "${c:5:9}"  > /$TMPDIR/079 ;;
07B#*)    echo "${c:5:9}"  > /$TMPDIR/07B ;;
232#*)    echo "${c:6:2}"  > /$TMPDIR/232 ;;
358#*)    echo "${c:5:1}"  > /$TMPDIR/358  ;;
3D2#*)    echo "${c:4:6}"  >  /$TMPDIR/3D2 ;;
0AB#*)    echo "${c:8:4}"  > /$TMPDIR/0AB ;;
122#*)    echo "${c:4:4}"  > /$TMPDIR/122 ;;
023#*)    echo "$c" > /$TMPDIR/023 ;;
322#*)    echo "${c:4:12}" > /$TMPDIR/322 ;;
340#*)    echo "$c" | cut -c9-10,19,20 > /$TMPDIR/340 ;;
esac

NOW=${a:1:10}${a:12:6}
[ $LATEST -eq 0 ] && LATEST=$(( $NOW - 1000 ))
[ $NOW -gt $LATEST ]  && {
LATEST=$(( $LATEST + $UPDATE_RATE ))

trans=`cat /$TMPDIR/340`
speed="${trans:2:2}"

# The date is done here
time="${a:6:8}"
echo -n "$time  "

rawkey=`cat /$TMPDIR/122`
key="Unk${rawkey} "
case "$rawkey" in
  0301) key="Kill" ;;
  0302) key="Kill" ;;
  0502) key="Acc " ;;
  1502) key="Acc " ;;
  0000) key="Off " ;;
  0001) key="Off " ;;
  4501) key="Strt" ;;
  5D01) key="Crnk" ;;
  4401)
    key="RRun"
    [ "$rpm1" == "0.0k" ] && key="RAcc"
    ;;
  0402) key="Run " ;;
esac
echo -n "KEY: $key  "

BRAKE=`cat /$TMPDIR/079 | cut -c1-3`
BRAKE=$(printf "%d" 0x$BRAKE)
BRAKE=`echo "0k $BRAKE 22.5 / p" | dc`
[ "$BRAKE" -gt 100 ] && BRAKE=100
[ "$BRAKE" -lt 100 ] && BRAKE=" $BRAKE"
[ "$BRAKE" -lt 10 ] && BRAKE=" $BRAKE"
echo -n "BRK:$BRAKE%"

ACC="$(cat /$TMPDIR/07B)"
ACCEL="$(printf "%d" 0x${ACC:0:3})"
ACCEL2="$(printf "%d" 0x${ACC:6:3})"
[ $ACCEL2 -lt 2000 ] && ACCEL2=2000
ACCEL2=`echo "0k $ACCEL2 2000 - 18 / p" | dc`
ACCEL2=`printf "%2d" $ACCEL2`
[ "$ACCEL" -lt 1900 ] && ACCEL=1900
ACCEL=`echo "0k $ACCEL 1990 - 100 * 2000 / p" | dc`
[ "$ACCEL" -lt 0 ] && ACCEL=0
[ "$ACCEL" -lt 100 ] && ACCEL=" $ACCEL"
[ "$ACCEL" -lt 10 ] && ACCEL=" $ACCEL"
echo -n "  ACCL:$ACCEL% "
[ "$SHOW_ALTERNATES" -eq 1 ] && echo -n "(VALVE $ACCEL2%) "

rpm1=`cat /$TMPDIR/322 | cut -c1-4`
rpm1="$(printf "%d" 0x$rpm1)"
[ $rpm1 = 65535 ] && rpm1="0"
printf " RPM: %4d  " $rpm1

STEER=`cat /$TMPDIR/023 | cut -c5-8`
STEER="$(printf "%d" 0x$STEER)"
STEERSIGN="R "
[[ $STEER -gt 4096  ]] && STEERSIGN="L "
STEER=`echo "4096 $STEER -p" | dc | cut -d- -f2`
STEER=`echo "2k $STEER 2 / p" | dc | cut -d. -f1`
STEER=`printf "%3d\n" ${STEER}`
SYMBOL="°"
[ "$STEER" -lt  2 ]    && STEERSIGN="  " && STEER="  0"
[ "$STEER" -gt  1000 ] && STEERSIGN="IN" && STEER="VAL" && SYMBOL="D"
echo -n "WHEEL: ${STEERSIGN}${STEER}${SYMBOL}  "

[ "$speed" == "FF" ] && speed="00"
speed="$(printf "%d" 0x$speed)"

gear=`echo $trans | cut -c2`
[ "$gear" == "F" ] && gear="NA"
[ "$gear" == "B" ] && gear="R " && speed="-$speed"
[ "$gear" == "D" ] && gear="P "
if [[ "$gear" =~ ^[1-9]+$ ]]
then gear="D$gear"
fi
[ "$gear" == "0" ] && gear="N "

mph=`cat /$TMPDIR/322 | cut -c5-8`
mph="$( printf "%d" 0x$mph)"
[ $mph == 65535 ] && mph="0"
[ $gear == "R " ] && mph="-$mph"
mph=`echo "2 k $mph 200 / p" | dc`
mph=`printf "%2.2f" $mph`

compass=`cat /$TMPDIR/358`
case "$compass" in
F) compass="??" ;;
0) compass="N " ;;
1) compass="NE" ;;
2) compass=" E" ;;
3) compass="SE" ;;
4) compass="S " ;;
5) compass="SW" ;;
6) compass=" W" ;;
7) compass="NW" ;;
esac
echo -n "DIR: $compass "

echo -n " GEAR: $gear  "

## # Another gear display. Double clutched automatic transmission?
## [ "$SHOW_ALTERNATES" -eq 1 ] && echo -n "(`cat /$TMPDIR/0AB`)  "

echo -n "ODOM: "
odometer=`cat /$TMPDIR/3D2`
odometer="$(printf "%d" 0x$odometer)"
odometer=`echo " $odometer * 50 / 8 " | bc`
if [ "$odometer" == "6" ]
       then
         odometer="0"
         echo -n "??????.?mi  "
       else
        printf '%8.1f' `echo "$odometer / 100" | bc -l`
        echo -n "mi  "
fi

printf "MPH: %5s  " $mph

# See the flag1 through flag3 quick entries at the start of
# this script. You can uncomment these lines to display their
# raw values, or you can start manipulating the numbers as you
# see fit.

# echo -n "FLAG1: $(cat /$TMPDIR/$flag1)  "
# echo -n "FLAG2: $(cat /$TMPDIR/$flag2)  "
# echo -n "FLAG3: $(cat /$TMPDIR/$flag3)  "

echo ""
}

done