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pirip
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prototyping frame repeater service, starts and stops OK :-)

pull/4/head
David Rowe 2020-11-16 20:27:49 +00:00
parent bb9af64722
commit 7e5f741a67
2 changed files with 54 additions and 3 deletions
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5
README.md
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@ -254,7 +254,7 @@ $ ./build_rtlsdr.sh
$ ./src/rtl_fsk -g 49 -f 144490000 - -a 200000 -r 10000 --code H_256_512_4 --mask 10000 --filter 0x1 | hexdump $ ./src/rtl_fsk -g 49 -f 144490000 - -a 200000 -r 10000 --code H_256_512_4 --mask 10000 --filter 0x1 | hexdump
``` ```
Then send test frames from HackRF on laptop, e.g. bursts of 3 frames: Then send test frames from HackRF on laptop, e.g. bursts of 3 frames:
``` ```
$ ./src/freedv_data_raw_tx --source 0x1 -c --testframes 3 --burst 1 --Fs 100000 --Rs 10000 --tone1 10000 --shift 10000 -a 30000 FSK_LDPC /dev/zero - | ./misc/tlininterp - - 40 -d -f | hackrf_transfer -t - -s 4E6 -f 143.5E6 $ ./src/freedv_data_raw_tx --source 0x1 -c --testframes 3 --burst 1 --Fs 100000 --Rs 10000 --tone1 10000 --shift 10000 -a 30000 FSK_LDPC /dev/zero - | ./misc/tlininterp - - 40 -d -f | hackrf_transfer -t - -s 4E6 -f 143.5E6
``` ```
This uses a source addressing scheme to filter out locally transmitted frames. In the example above, the laptop has This uses a source addressing scheme to filter out locally transmitted frames. In the example above, the laptop has
@ -264,8 +264,7 @@ $ ./build_rtlsdr.sh
# Reading Further # Reading Further
1. [Open IP over VHF/UHF 1](http://www.rowetel.com/?p=7207) - Blog post introducing this project 1. Open IP over VHF/UHF [Part 1](http://www.rowetel.com/?p=7207) [Part 2](http://www.rowetel.com/?p=7334) [Part 3](http://www.rowetel.com/?p=7567)
1. [Open IP over VHF/UHF 2](http://www.rowetel.com/?p=7334) - Second blog post on uncoded OTA tests
1. [FSK_LDPC Data Mode](http://www.rowetel.com/?p=7467) - Physical layer design and testing 1. [FSK_LDPC Data Mode](http://www.rowetel.com/?p=7467) - Physical layer design and testing
1. [Codec 2 FSK Raw Data Modes](https://github.com/drowe67/codec2/blob/master/README_data.md) 1. [Codec 2 FSK Raw Data Modes](https://github.com/drowe67/codec2/blob/master/README_data.md)
1. [Codec 2 FSK Modem](https://github.com/drowe67/codec2/blob/master/README_fsk.md) 1. [Codec 2 FSK Modem](https://github.com/drowe67/codec2/blob/master/README_fsk.md)

52
script/pirip 100755
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@ -0,0 +1,52 @@
#!/bin/bash -x
# pirip service script
# TODO
# [X] way to send stderr to log file
# [ ] way to set freq at start up
# [ ] way to set Rs and M at start up
# [ ] way to start as frame repeater or beacon
TERM_ADDR=0x2
RS=10000
DATA_BITS_PER_FRAME=256
CODE=H_${DATA_BITS_PER_FRAME}_512_4
TR_SWITCH_GPIO=21
PIRIP_PATH=/home/pi/pirip
NAME=pirip
PIDFILE=/var/run/${NAME}.pid
LOGFILE=/var/log/${NAME}.log
PATH=${PIRIP_PATH}/tx:${PIRIP_PATH}/librtlsdr/build_rtlsdr/src:${PATH}
case "$1" in
start)
( rtl_fsk -g 49 -f 144490000 - -a 200000 -r ${RS} --code ${CODE} --mask ${RS} --filter ${TERM_ADDR} -q -b | \
frame_repeater ${DATA_BITS_PER_FRAME} ${TERM_ADDR} | \
rpitx_fsk - --code ${CODE} -r ${RS} -s ${RS} -g ${TR_SWITCH_GPIO} -- ) >>${LOGFILE} 2>&1 &
RETVAL=$?
echo $!>${PIDFILE}
[ $RETVAL = 0 ] && echo -ne '\t\t\t\t\t[ \033[32mOK\033[0m ]\n'
;;
stop)
parent=$(cat ${PIDFILE})
children=$(ps -o pid= --ppid ${parent})
kill ${children}
rm ${PIDFILE}
;;
restart)
$0 stop
$0 start
;;
status)
if [ -e ${PIDFILE} ]; then
echo ${NAME} is running, pid=`cat ${PIDFILE}`
else
echo$ {NAME} is NOT running
exit 1
fi
;;
*)
echo "Usage: $0 {start|stop|status|restart}"
esac
exit 0