1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
#!/usr/bin/env bash
# tnc4_high_snr_ping.sh
#
# HF TNC use case test 4
# + Terminal 1 sends frames to Terminal 2
# + Terminal 2 receives frames and re-transmits them back to Terminal 1
# + Terminal 1 and 2 count number of frames received (see logfiles)
# + The modem samples are sent over virtual sound cards, this runs in real time, which
# can be slow for tests involving many packets. Therefore this test is implemented as a
# service script.
NAME=tnc4
CODEC2_PATH=${HOME}/codec2
PIDFILE_TX1=/tmp/${NAME}_tx1.pid
PIDFILE_RX1=/tmp/${NAME}_rx1.pid
PIDFILE_RX2=/tmp/${NAME}_rx2.pid
LOGFILE1=${NAME}_1.log
LOGFILE2=${NAME}_2.log
PATH=${CODEC2_PATH}/build_linux/src:${PATH}
DELAY="${DELAY:-500}"
MAX_RUN_TIME=3600
# in this version we use single frame bursts, so BURSTS==FRAMES
BURSTS=$2
MODE=DATAC0
function tx1 {
freedv_data_raw_tx ${MODE} /dev/zero - --testframes ${BURSTS} --bursts ${BURSTS} --delay ${DELAY} | aplay --device="plughw:CARD=CHAT2,DEV=1" -f S16_LE
}
function rx2_background {
# re-transmit any frames we receive
( arecord --device="plughw:CARD=CHAT2,DEV=0" -f S16_LE -d $MAX_RUN_TIME | \
freedv_data_raw_rx ${MODE} - - --framesperburst 1 --vv --testframes | \
freedv_data_raw_tx ${MODE} - - --delay ${DELAY} | \
aplay --device="plughw:CARD=CHAT1,DEV=1" -f S16_LE ) 2>${LOGFILE2} &
# killing arecord kills the entire pipeline
echo $(pidof arecord)>${PIDFILE_RX2}
}
function rx1_background {
arecord --device="plughw:CARD=CHAT1,DEV=0" -f S16_LE -d $MAX_RUN_TIME | freedv_data_raw_rx ${MODE} - /dev/null --framesperburst 1 --vv --testframes &
echo $!>${PIDFILE_RX1}
}
function stop_process {
if [ -e ${1} ]; then
pid=$(cat ${1})
rm ${1}
kill ${pid}
fi
}
function stop_service {
echo "service stopping - bye!" 1>&2
stop_process ${PIDFILE_RX1}
stop_process ${PIDFILE_RX2}
stop_process ${PIDFILE_TX1}
}
function check_running {
if [ -e ${PIDFILE_TX1} ]; then
echo "Tx already running... pid: ${PIDFILE_TX1}"
exit 1
fi
if [ -e ${PIDFILE_RX1} ]; then
echo "Rx1 already running... pid: ${PIDFILE_RX1}"
exit 1
fi
if [ -e ${PIDFILE_RX2} ]; then
echo "Rx2 already running... pid: ${PIDFILE_RX2}"
exit 1
fi
}
function check_alsa_loopback {
lsmod | grep snd_aloop >> /dev/null
if [ $? -eq 1 ]; then
echo "ALSA loopback device not present. Please install with:"
echo
echo " sudo modprobe snd-aloop index=1,2 enable=1,1 pcm_substreams=1,1 id=CHAT1,CHAT2"
exit 1
fi
}
case "$1" in
start)
check_running
check_alsa_loopback
rx2_background
( rx1_background && sleep 1 && tx1 && sleep 5 && stop_service ) 2>${LOGFILE1} &
echo $!>${PIDFILE_TX1}
echo "Results for terminal 1 in ${LOGFILE1} and terminal 2 in ${LOGFILE2}"
;;
stop)
stop_service
;;
restart)
$0 stop
$0 start
;;
status)
if [ -e ${PIDFILE_TX1} ]; then
echo ${NAME} is running, pid=`cat ${PIDFILE_TX1}`
else
echo ${NAME} is NOT running
exit 1
fi
;;
*)
echo "Usage: $0 {start|start_verbose|stop|restart|status} NumFrames"
echo " $0 start 5 - test ping over 5 frames; logs sent to ${LOGFILE1} and ${LOGFILE2}"
esac
exit 0
|
