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#!/bin/sh
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#CAN Bus loopback test script
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#Gregory Dias
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#Last modified 5/14/2014
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if [ $# -lt 1 ]
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then
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echo "Please specify a bitrate (bits/second)"
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exit 1
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fi
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case $1 in
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''|*[!0-9]*) echo "Please specify an integer bitrate";exit 1;;
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*) BITRATE=$1 ;;
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esac
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#BITRATE=$1
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if [[ $BITRATE -lt 10000 && $BITRATE -gt 1000000 ]]
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then
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echo "Please specify a bitrate in the range of 10Kbits to 1Mbits"
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echo "in a numerical format. (EX: 500Kbits is 500000)"
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exit 1
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fi
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echo "CAN Bus loopback test script - V1"
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echo
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echo "Configuring devices with bitrate $BITRATE..."
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echo
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canconfig can0 stop
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canconfig can1 stop
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canconfig can0 bitrate $BITRATE
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canconfig can1 bitrate $BITRATE
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canconfig can0 start
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canconfig can1 start
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echo
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echo "Test 1: can1 -> can0"
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echo "============================"
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#read from can0, write from can1
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candump can0 > can0.out &
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CAN0_PID=$!
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cansend can1 -i 0x00 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88 --loop=15
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sleep 2
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cansend can1 -i 0x88 0x88 0x77 0x66 0x55 0x44 0x33 0x22 0x11 --loop=15
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sleep 2
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kill $CAN0_PID
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#send one last message to ensure candump is closed (odd)
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cansend can1 -i 0xAA
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WC=`wc -l can0.out | awk '{print $1}'`
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LOOP1COUNT=0
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LOOP2COUNT=0
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while read LINE
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do
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if [ "$LINE" == "<0x000> [8] 11 22 33 44 55 66 77 88" ]
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then
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LOOP1COUNT=`expr $LOOP1COUNT + 1`
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fi
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if [ "$LINE" == "<0x088> [8] 88 77 66 55 44 33 22 11" ]
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then
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LOOP2COUNT=`expr $LOOP2COUNT + 1`
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fi
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if [ "$LINE" == "<0x0aa> [0]" ]
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then
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WC=`expr $WC - 2`
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fi
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done < can0.out
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if [ $WC -eq `expr $LOOP1COUNT + $LOOP2COUNT` ]
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then
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CAN0R="PASS"
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CAN1W="PASS"
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else
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CAN0R="FAIL"
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CAN1W="FAIL"
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fi
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if [ $WC -eq 0 ]
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then
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CAN0R="FAIL"
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CAN1W="FAIL"
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fi
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echo
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echo "Test 2: can0 -> can1"
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echo "============================"
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#read from can1, write from can0
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candump can1 > can1.out &
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CAN1_PID=$!
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cansend can0 -i 0xFF 0x99 0xAA 0xBB 0xCC 0xDD 0xEE 0xFF 0x00 --loop=15
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sleep 2
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cansend can0 -i 0x22 0x00 0xFF 0xEE 0xDD 0xCC 0xBB 0xAA 0x99 --loop=15
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sleep 2
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kill $CAN1_PID
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#send one last message to ensure candump is closed
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cansend can0 -i 0x33
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WC=`wc -l can1.out | awk '{print $1}'`
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LOOP1COUNT=0
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LOOP2COUNT=0
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while read LINE
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do
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if [ "$LINE" == "<0x0ff> [8] 99 aa bb cc dd ee ff 00" ]
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then
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LOOP1COUNT=`expr $LOOP1COUNT + 1`
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fi
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if [ "$LINE" == "<0x022> [8] 00 ff ee dd cc bb aa 99" ]
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then
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LOOP2COUNT=`expr $LOOP2COUNT + 1`
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fi
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if [ "$LINE" == "<0x033> [0]" ]
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then
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WC=`expr $WC - 2`
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fi
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done < can1.out
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if [ $WC -eq `expr $LOOP1COUNT + $LOOP2COUNT` ]
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then
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CAN1R="PASS"
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CAN0W="PASS"
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else
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CAN1R="FAIL"
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CAN0W="FAIL"
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fi
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if [ $WC -eq 0 ]
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then
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CAN1R="FAIL"
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CAN0W="FAIL"
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fi
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echo
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echo "Test results:"
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echo "can0: Read - $CAN0R | Write - $CAN0W"
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echo "can1: Read - $CAN1R | Write - $CAN1W"
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#cleanup
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rm can[0-1].out
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echo
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echo done.
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