Commit | Line | Data |
---|---|---|
4eb6c240 | 1 | #!/bin/sh |
4257d52f TM |
2 | #Serial line tester v0.3 |
3 | #Tested in busybox ash | |
4eb6c240 | 4 | #(c) Tomas Mudrunka 2022-2024 |
55d43182 | 5 | |
4eb6c240 TM |
6 | trylimit=0 |
7 | seconds=0 | |
8 | baudrate=115200 | |
9 | workaround_rs485=false | |
10 | ||
11 | while getopts ":t:r:b:l:s:w" OPT; do | |
12 | #echo "$OPT ==> $OPTARG"; | |
13 | case $OPT in | |
14 | t) port_tx=$OPTARG;; | |
15 | r) port_rx=$OPTARG;; | |
16 | b) baudrate=$OPTARG;; | |
17 | l) trylimit=$OPTARG;; | |
18 | s) seconds=$OPTARG;; | |
19 | w) workaround_rs485=true;; | |
20 | ||
21 | '?') echo "Usage: $0 -t /dev/ttyTX [-r /dev/ttyRX] [-b 9600] [-l 10] [-s 10] [-w]" >&2; exit 250;; | |
22 | ':') echo "Missing option argument for -$OPTARG" >&2; exit 251;; | |
23 | * ) echo "Unimplemented option: -$OPT" >&2; exit 252;; | |
24 | esac | |
25 | done | |
26 | ||
27 | [ -z "$port_tx" ] && port_tx="$port_rx" | |
28 | [ -z "$port_rx" ] && port_rx="$port_tx" | |
29 | [ -z "$port_rx" ] && { echo Port not specified; exit 253; } | |
55d43182 | 30 | |
55d43182 TM |
31 | |
32 | testdata="${RANDOM}d82b2ae45432e7c80699852ab557b279c42180a379711aae85487bda0cc58602f65c0ab5af0d510d6ac1606c52f887f3332052f67c45212dbbf2730${RANDOM}" | |
33 | ||
4eb6c240 TM |
34 | echo "Running $baudrate baud loopback test on $port_tx -> $port_rx" |
35 | echo "Limiting to $trylimit iterations and $seconds seconds (0 = no limit)" | |
55d43182 | 36 | |
4eb6c240 TM |
37 | stty -F "$port_tx" raw -echo "$baudrate" |
38 | stty -F "$port_rx" raw -echo "$baudrate" | |
55d43182 TM |
39 | |
40 | exec 5>"$port_tx" | |
41 | exec 6<"$port_rx" | |
42 | ||
4eb6c240 TM |
43 | $workaround_rs485 && { |
44 | echo "Deasserting RTS on buggy RS485 drivers by writing to RX port" | |
45 | echo>"$port_rx" | |
46 | read -rst 1 -u 6 | |
47 | } | |
48 | ||
55d43182 | 49 | errcnt=0 |
4eb6c240 TM |
50 | trycnt=0 |
51 | datestart="$(date +%s)" | |
52 | dateend="$(($datestart+$seconds))" | |
55d43182 TM |
53 | while true; do |
54 | echo "$testdata" >&5 | |
55 | unset line | |
56 | read -rst 1 -u 6 line | |
57 | #echo "LINE: $line" | |
4257d52f | 58 | [ "$line" != "$testdata" ] && errcnt=$((errcnt+1)) && |
55d43182 | 59 | echo -e "$(date +'%D %T')\t$errcnt\tError receiving data $port_tx -> $port_rx" |
4eb6c240 TM |
60 | trycnt=$((trycnt+1)) |
61 | #echo "try $trycnt err $errcnt lim $trylimit" | |
62 | [ $trylimit -gt 0 -a $trycnt -gt $trylimit ] && break | |
63 | [ $seconds -gt 0 ] && [ $(date +%s) -gt $dateend ] && break | |
55d43182 TM |
64 | done |
65 | ||
66 | exec 5>&- | |
67 | exec 6<&- | |
4eb6c240 TM |
68 | |
69 | echo TRANSMITTED: $trycnt, ERRORS: $errcnt, SECONDS: $(($(date +%s)-$datestart)) | |
70 | [ "$errcnt" = "0" -a "$trycnt" -gt 0 ] && exit 0 | |
71 | exit 255 |