plutosdr_sweepTXLO

#!/bin/sh

# sweep the Pluto LO with a tone

while [ -n "$1" ]; do
  case "$1" in
    -s) s="$2"
	shift
	;;
    -e) e="$2"
	shift
	;;
    -i) inc="$2"
	shift
	;;
    -g) g="$2"
	shift
	;;
    -d) d="$2"
	shift
	;;
    -?) echo "plutosdr-sweep\n  options:\n   -s: start frequency\n   -e: end frequency"
	echo "   -i: increment frequency\n   -g: tx gain\n   -d: delay between changes"
	exit
  esac
  shift
done

 
# Find the range
r=$(iio_attr -a -q -c ad9361-phy TX_LO frequency_available | tail -1 | sed -e 's:\[::g' -e 's:\]::g')
s_c=$(echo $r| awk '{print $1}')
e_c=$(echo $r| awk '{print $3}')
if [ -z "$s" ] ; then
  s=${s_c}
fi
if [ -z "$e" ] ; then
  e=${e_c}
fi
if [ "$s" -gt "$e" ] ; then
  echo starting frequency $s must be less than end frequency $e
  exit
fi
if [ "$s" -lt "$s_c" ] ; then
  echo start frequency $s too low, capable of $s_c
  exit
fi
if [ "$e_c" -lt "$e" ] ; then
  echo end frequency $e too high, capable of $e_c
  exit
fi
if [ -z "$g" ] ; then
  g=$(iio_attr -a -q -c -o ad9361-phy voltage0 hardwaregain  | tail -1 | awk '{print $1}')
fi
if [ -z "$inc" ] ; then
  inc=$(expr \( $e - $s \) \/ 1024)
fi
if [ -z "$d" ] ; then
  d=0.1
fi

echo start $s to end $e in $inc increments with gain $g

# sample rate 30.72 MSPS
iio_attr -a -q -c ad9361-phy voltage0 sampling_frequency 30720000

# set the DDS to full scale
iio_attr -a -q -c cf-ad9361-dds-core-lpc TX1_I_F1 frequency 1000000
iio_attr -a -q -c cf-ad9361-dds-core-lpc TX1_Q_F1 frequency 1000000
iio_attr -a -q -c cf-ad9361-dds-core-lpc TX1_I_F1 scale 0.707947
iio_attr -a -q -c cf-ad9361-dds-core-lpc TX1_Q_F1 scale 0.707947

#set the Tx attenuation
iio_attr -a -q -c -o ad9361-phy voltage0 hardwaregain $g

for i in $(seq $s $inc $e)
do
	sleep $d
	echo $i | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta'
	iio_attr -a -q -c ad9361-phy TX_LO frequency $i >/dev/null
done