Commit | Line | Data |
---|---|---|
4eb6c240 | 1 | #!/bin/sh |
cab857a9 | 2 | # |
4257d52f | 3 | #Serial line tester v0.3 |
4eb6c240 | 4 | #(c) Tomas Mudrunka 2022-2024 |
cab857a9 TM |
5 | # |
6 | #Tested in: busybox ash, bash | |
55d43182 | 7 | |
4eb6c240 TM |
8 | trylimit=0 |
9 | seconds=0 | |
10 | baudrate=115200 | |
11 | workaround_rs485=false | |
12 | ||
13 | while getopts ":t:r:b:l:s:w" OPT; do | |
14 | #echo "$OPT ==> $OPTARG"; | |
15 | case $OPT in | |
16 | t) port_tx=$OPTARG;; | |
17 | r) port_rx=$OPTARG;; | |
18 | b) baudrate=$OPTARG;; | |
19 | l) trylimit=$OPTARG;; | |
20 | s) seconds=$OPTARG;; | |
21 | w) workaround_rs485=true;; | |
22 | ||
23 | '?') echo "Usage: $0 -t /dev/ttyTX [-r /dev/ttyRX] [-b 9600] [-l 10] [-s 10] [-w]" >&2; exit 250;; | |
24 | ':') echo "Missing option argument for -$OPTARG" >&2; exit 251;; | |
25 | * ) echo "Unimplemented option: -$OPT" >&2; exit 252;; | |
26 | esac | |
27 | done | |
28 | ||
29 | [ -z "$port_tx" ] && port_tx="$port_rx" | |
30 | [ -z "$port_rx" ] && port_rx="$port_tx" | |
31 | [ -z "$port_rx" ] && { echo Port not specified; exit 253; } | |
55d43182 | 32 | |
55d43182 TM |
33 | |
34 | testdata="${RANDOM}d82b2ae45432e7c80699852ab557b279c42180a379711aae85487bda0cc58602f65c0ab5af0d510d6ac1606c52f887f3332052f67c45212dbbf2730${RANDOM}" | |
35 | ||
4eb6c240 TM |
36 | echo "Running $baudrate baud loopback test on $port_tx -> $port_rx" |
37 | echo "Limiting to $trylimit iterations and $seconds seconds (0 = no limit)" | |
55d43182 | 38 | |
4eb6c240 TM |
39 | stty -F "$port_tx" raw -echo "$baudrate" |
40 | stty -F "$port_rx" raw -echo "$baudrate" | |
55d43182 TM |
41 | |
42 | exec 5>"$port_tx" | |
43 | exec 6<"$port_rx" | |
44 | ||
4eb6c240 TM |
45 | $workaround_rs485 && { |
46 | echo "Deasserting RTS on buggy RS485 drivers by writing to RX port" | |
47 | echo>"$port_rx" | |
48 | read -rst 1 -u 6 | |
49 | } | |
50 | ||
55d43182 | 51 | errcnt=0 |
4eb6c240 TM |
52 | trycnt=0 |
53 | datestart="$(date +%s)" | |
54 | dateend="$(($datestart+$seconds))" | |
55d43182 TM |
55 | while true; do |
56 | echo "$testdata" >&5 | |
57 | unset line | |
58 | read -rst 1 -u 6 line | |
59 | #echo "LINE: $line" | |
4257d52f | 60 | [ "$line" != "$testdata" ] && errcnt=$((errcnt+1)) && |
55d43182 | 61 | echo -e "$(date +'%D %T')\t$errcnt\tError receiving data $port_tx -> $port_rx" |
4eb6c240 TM |
62 | trycnt=$((trycnt+1)) |
63 | #echo "try $trycnt err $errcnt lim $trylimit" | |
64 | [ $trylimit -gt 0 -a $trycnt -gt $trylimit ] && break | |
65 | [ $seconds -gt 0 ] && [ $(date +%s) -gt $dateend ] && break | |
55d43182 TM |
66 | done |
67 | ||
68 | exec 5>&- | |
69 | exec 6<&- | |
4eb6c240 TM |
70 | |
71 | echo TRANSMITTED: $trycnt, ERRORS: $errcnt, SECONDS: $(($(date +%s)-$datestart)) | |
72 | [ "$errcnt" = "0" -a "$trycnt" -gt 0 ] && exit 0 | |
73 | exit 255 |