Mity CPU Platforms » MitySOM-335x (ARM Cortex-A8 Based Products)

#!/bin/sh

#CAN Bus loopback test script

#Gregory Dias

#Last modified 5/14/2014

if [ $# -lt 1 ]

then

	echo "Please specify a bitrate (bits/second)"

	exit 1

fi

case $1 in

    ''|*[!0-9]*) echo "Please specify an integer bitrate";exit 1;;

    *) BITRATE=$1 ;;

esac

#BITRATE=$1

if [[ $BITRATE -lt 10000 && $BITRATE -gt 1000000 ]]

then

	echo "Please specify a bitrate in the range of 10Kbits to 1Mbits"

	echo "in a numerical format. (EX: 500Kbits is 500000)"

	exit 1

fi

echo "CAN Bus loopback test script - V1"

echo

echo "Configuring devices with bitrate $BITRATE..."

echo

canconfig can0 stop

canconfig can1 stop

canconfig can0 bitrate $BITRATE

canconfig can1 bitrate $BITRATE

canconfig can0 start

canconfig can1 start

echo

echo "Test 1: can1 -> can0"

echo "============================"

#read from can0, write from can1

candump can0 > can0.out &

CAN0_PID=$!

cansend can1 -i 0x00 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88 --loop=15

sleep 2

cansend can1 -i 0x88 0x88 0x77 0x66 0x55 0x44 0x33 0x22 0x11 --loop=15

sleep 2

kill $CAN0_PID

#send one last message to ensure candump is closed (odd)

cansend can1 -i 0xAA

WC=`wc -l can0.out | awk '{print $1}'`

LOOP1COUNT=0

LOOP2COUNT=0

while read LINE

do

	if [ "$LINE" == "<0x000> [8] 11 22 33 44 55 66 77 88" ]

	then

		LOOP1COUNT=`expr $LOOP1COUNT + 1`

	fi

	if [ "$LINE" == "<0x088> [8] 88 77 66 55 44 33 22 11" ]

	then

		LOOP2COUNT=`expr $LOOP2COUNT + 1`

	fi

	if [ "$LINE" == "<0x0aa> [0]" ]

	then

		WC=`expr $WC - 2`

	fi

done < can0.out

if [ $WC -eq `expr $LOOP1COUNT + $LOOP2COUNT` ]

then

	CAN0R="PASS"

	CAN1W="PASS"

else

	CAN0R="FAIL"

	CAN1W="FAIL"

fi

if [ $WC -eq 0 ]

then

	CAN0R="FAIL"

	CAN1W="FAIL"

fi

echo

echo "Test 2: can0 -> can1"

echo "============================"

#read from can1, write from can0

candump can1 > can1.out &

CAN1_PID=$!

cansend can0 -i 0xFF 0x99 0xAA 0xBB 0xCC 0xDD 0xEE 0xFF 0x00 --loop=15

sleep 2

cansend can0 -i 0x22 0x00 0xFF 0xEE 0xDD 0xCC 0xBB 0xAA 0x99 --loop=15

sleep 2

kill $CAN1_PID

#send one last message to ensure candump is closed

cansend can0 -i 0x33

WC=`wc -l can1.out | awk '{print $1}'`

LOOP1COUNT=0

LOOP2COUNT=0

while read LINE

do

        if [ "$LINE" == "<0x0ff> [8] 99 aa bb cc dd ee ff 00" ]

        then

                LOOP1COUNT=`expr $LOOP1COUNT + 1`

        fi

        if [ "$LINE" == "<0x022> [8] 00 ff ee dd cc bb aa 99" ]

        then

                LOOP2COUNT=`expr $LOOP2COUNT + 1`

        fi

        if [ "$LINE" == "<0x033> [0]" ]

        then

                WC=`expr $WC - 2`

        fi

done < can1.out

if [ $WC -eq `expr $LOOP1COUNT + $LOOP2COUNT` ]

then

	CAN1R="PASS"

	CAN0W="PASS"

else

	CAN1R="FAIL"

	CAN0W="FAIL"

fi

if [ $WC -eq 0 ]

then

	CAN1R="FAIL"

	CAN0W="FAIL"

fi

echo 

echo "Test results:"

echo "can0: Read - $CAN0R | Write - $CAN0W"

echo "can1: Read - $CAN1R | Write - $CAN1W"

#cleanup

rm can[0-1].out

echo

echo done.