Lepsi tester seriovky

diff --git a/bash/serial_loopback_test.sh b/bash/serial_loopback_test.sh
old mode 100644 (file)
new mode 100755 (executable)
index 6e24309..f160b2d
--- a/bash/serial_loopback_test.sh
+++ b/bash/serial_loopback_test.sh
@@ -1,35 +1,71 @@
-#!/bin/bash
-#(c) Tomas Mudrunka 2022
+#!/bin/sh
+#Serial line tester, should work in busybox ash
+#(c) Tomas Mudrunka 2022-2024
 
-[ -z "$1" ] && {
-       echo "Usage: $0 /dev/ttyTX [/dev/ttyRX]"
-       exit 1
-}
+trylimit=0
+seconds=0
+baudrate=115200
+workaround_rs485=false
+
+while getopts ":t:r:b:l:s:w" OPT; do
+       #echo "$OPT ==> $OPTARG";
+       case $OPT in
+               t) port_tx=$OPTARG;;
+               r) port_rx=$OPTARG;;
+               b) baudrate=$OPTARG;;
+               l) trylimit=$OPTARG;;
+               s) seconds=$OPTARG;;
+               w) workaround_rs485=true;;
+
+               '?') echo "Usage: $0 -t /dev/ttyTX [-r /dev/ttyRX] [-b 9600] [-l 10] [-s 10] [-w]"      >&2; exit 250;;
+               ':') echo "Missing option argument for -$OPTARG"                                        >&2; exit 251;;
+               *  ) echo "Unimplemented option: -$OPT"                                                 >&2; exit 252;;
+       esac
+done
+
+[ -z "$port_tx" ] && port_tx="$port_rx"
+[ -z "$port_rx" ] && port_rx="$port_tx"
+[ -z "$port_rx" ] && { echo Port not specified; exit 253; }
 
-port_tx="${1:-/dev/ttyUSB0}"
-port_rx="${2:-$port_tx}"
 
 testdata="${RANDOM}d82b2ae45432e7c80699852ab557b279c42180a379711aae85487bda0cc58602f65c0ab5af0d510d6ac1606c52f887f3332052f67c45212dbbf2730${RANDOM}"
 
-echo "Running loopback test on $port_tx -> $port_rx"
+echo "Running $baudrate baud loopback test on $port_tx -> $port_rx"
+echo "Limiting to $trylimit iterations and $seconds seconds (0 = no limit)"
 
-stty -F "$port_tx" raw -echo
-stty -F "$port_rx" raw -echo
+stty -F "$port_tx" raw -echo "$baudrate"
+stty -F "$port_rx" raw -echo "$baudrate"
 
 exec 5>"$port_tx"
 exec 6<"$port_rx"
 
+$workaround_rs485 && {
+       echo "Deasserting RTS on buggy RS485 drivers by writing to RX port"
+       echo>"$port_rx"
+       read -rst 1 -u 6
+}
+
 errcnt=0
+trycnt=0
+datestart="$(date +%s)"
+dateend="$(($datestart+$seconds))"
 while true; do
        echo "$testdata" >&5
        unset line
        read -rst 1 -u 6 line
        #echo "LINE: $line"
        [ "$line" != "$testdata" ] && {
-               ((errcnt=errcnt+1))
                echo -e "$(date +'%D %T')\t$errcnt\tError receiving data $port_tx -> $port_rx"
-       }
+       } && errcnt=$((errcnt+1))
+       trycnt=$((trycnt+1))
+       #echo "try $trycnt err $errcnt lim $trylimit"
+       [ $trylimit -gt 0 -a $trycnt -gt $trylimit ] && break
+       [ $seconds -gt 0 ] && [ $(date +%s) -gt $dateend ] && break
 done
 
 exec 5>&-
 exec 6<&-
+
+echo TRANSMITTED: $trycnt, ERRORS: $errcnt, SECONDS: $(($(date +%s)-$datestart))
+[ "$errcnt" = "0" -a "$trycnt" -gt 0 ] && exit 0
+exit 255