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

#!/bin/sh

#CAN Bus echo test script

#Gregory Dias

#Last modified 5/22/2014

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 echo test script - V1"

echo

echo "Configuring can0 with bitrate $BITRATE..."

echo

canconfig $2 stop

canconfig $2 bitrate $BITRATE

canconfig $2 start

echo

echo "Testing can1..."

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

#using canecho on another devkit (or similar device) this script

#will be witing to see identical messages with an incremented id

#set up canread for file output

candump $2 > can1.out &

CAN1_PID=$!

sleep 1

cansend $2 -i 0x00 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88 --loop=15

sleep 2

cansend $2 -i 0x88 0x88 0x77 0x66 0x55 0x44 0x33 0x22 0x11 --loop=15

sleep 2

kill $CAN1_PID

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

#canread must block when waiting for a read)

cansend $2 -i 0xAA

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

let WC=($WC-2)/2

LOOP1COUNT=0

LOOP2COUNT=0

while read LINE

do

	if [ "$LINE" == "<0x001> [8] 11 22 33 44 55 66 77 88" ]

	then

		LOOP1COUNT=`expr $LOOP1COUNT + 1`

	fi

	if [ "$LINE" == "<0x089> [8] 88 77 66 55 44 33 22 11" ]

	then

		LOOP2COUNT=`expr $LOOP2COUNT + 1`

	fi

done < can1.out

echo $WC

echo $LOOP1COUNT $LOOP2COUNT

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

then

	CAN1="PASS"

else

	CAN1="FAIL"

fi

echo "Test results:"

echo "can1: $CAN1"

#cleanup

#rm can1.out

echo

echo done.